Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. ogtr epne fbnhcivrertst oeoetreatment Kjærstad rotenone Gaute to invertebrates benthic of responses Long-term at Kjærstad invertebrates Gaute benthic on effects treatment Rotenone rotenone title: to Running invertebrates benthic will of and responses long-term re-colonization However, Long-term for potential treatment. thus and after connectivity months habitat eight taxa. on among fauna depending and vary lotic locations and the among taxa-specific on differ be effects to and likely severe control are between but effects and invertebrates, time (i.e. benthic over short-term on both minor turnover considerably treatment indicates of varied Species study effects taxa Our lake. override invertebrate fauna variation upstream locations. of environmental lotic treatment an abundance natural the from the that However, Likewise, exposure indicating treated treatment. rotenone locations, locations. a rotenone treatment of lotic and and measured period and control control turnover, lentic a a between species following in markedly both co-varied on affected both in treatment negatively observed year the severely were per after temporarily invertebrates times were immediately was benthic four invertebrates effects of to benthic short-term beta-diversity, two minor of temporal stations relatively as samples lotic only Kick-net two general, communities and invertebrate In design. stations on watershed. rotenone Before-After-Control-Impact sampling piscicide lentic a the three of using po- from effects detect course on collected whole to water study needed involving six-year parasites Norwegian are a methods non-native a surveys report indiscriminate of we long-term from Here, using documented, eradication abundantly when effects. The are ecosystem particularly biodiversity. effects wider strategy, tential short-term native conservation While to controversial damage. threats a collateral largest are ecosystem the hosts of of one culling as by regarded are invasions Biological Abstract 2021 20, July 2 Naturhistorie 1 at jrtd eateto aua itr,NN nvriyMsu,NreinUiest of University Acknowledgements Norwegian Museum, University [email protected] NTNU Email: History, Norway. Natural Trondheim, Technology, of and Science Department Kjærstad, Gaute Correspondence 3 2 Norway Trondheim, logy, 1 eateto ilgclSine,Uiest fBre,Bre,Norway Bergen, Bergen, of University Sciences, Biological of Norway Department Bergen, LFI, Centre, Techno- Research and Norwegian Science NORCE of University Norwegian Museum, University NTNU History, Natural of Department OC owga eerhCnr AS Centre Research Norwegian NORCE for Institutt Vitenskapsmuseet universitet teknisk-naturvitenskapelige Norges 1 1 oArnekleiv Jo , | oVgrArnekleiv Vegar Jo 1 at Velle Gaute , 1 | at Velle Gaute 2 1 n nesGabø Finstad Gravbrøt Anders and , < n ot)o ogtr ie oryas ffcso rotenone of effects years) four (i.e. long-term or month) one 2,3 | nesGabø Finstad Gravbrøt Anders 1 1 Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. hr-emipcso o-agtognss iebnhcivrertsi eldcmne eg Koksvik (e.g. documented well fauna. aquatic is wider invertebrates the on benthic impacts like indiscriminate organisms, its populations. to non-target host In due of on largely fish. culling invasive is impacts through the This of parasites Short-term controversial. of fish populations is one of rotenone eradicating is eradication of for It for Use measure 2005). used accepted 2000, widely (McClay, fish been widely manipulating ponds has and abundances, rearing rotenone cost-effective almost fish addition, of only, for quantifying treatment tool the naturally of or management are or purpose fish fisheries plants the few, a these sport with as where maintain used either areas to been 2010), in also and populations al., fish has birds et capturing It to (Finlayson of 1973). toxicity century Leguminosae Meadows, mean low the a 1961, a has in Price, as but species & centuries rotenone. invertebrates plant (Brooks for is from certain occurring used originating to species been invasive compound and have botanical of fish and a eradication to family is toxic for Rotenone highly measures 2003). is used (Ling, which mammals widely piscicide most a the small, is of but This in one anything often ecosystems, in as are aquatic species such measures aquatic In 1999). invasive corridors, reliable al., eradicate environmental et to and (Holdich impossible through cost-effective species virtually waterbodies move invasive for become enclosed may to options alien may it However, approach required Such since Early This 2009). limited are establishment. 2009). method. (Hulme, following species management Epifanio, regional ecosystems effective when & to freshwater only effective local (Dittel the from therefore particularly impacts often escalate be economic are that 2000), actions problems major eradication al., cause properties as targeted et and invasive well display rapidly (Kumschick (Mack may interactions spread as biodiversity ecological species may indirect native Alien 2015), and 2014). to direct al., al., both threats et et through largest Caffrey consequences 2000, ecological the al., serious of et inducing (Sala one freshwater as in regarded including are invasions Biological recolonization piscicide, 1 diversity, beta and invertebrates, treatment. connectivity benthic species, after habitat taxa. alien on months among and depending eight locations vary fauna among and differ lotic Keywords taxa-specific will the and be re-colonization on to for effects likely potential are thus severe effects but long-term invertebrates, However, locations. benthic treatment (i.e. and on short-term control treatment minor between indicates and abundance time study the over Likewise, indi- Our both treatment. locations, considerably rotenone treatment varied of and taxa effects control locations. invertebrate override between exposure variation of lotic markedly rotenone environmental and co-varied of natural turnover lentic period that a Species in cating following lake. both affected upstream negatively observed severely an were temporarily from mea- invertebrates was turnover, fauna species both benthic lotic on in of treatment the However, year beta-diversity, the after per temporal immediately times as effects four short-term sured minor to relatively two only stations general, In lotic watershed. two treated invertebrates and Nor- a benthic a stations and of from sampling control communities samples lentic invertebrate a Kick-net three on design. rotenone from Before-After-Control-Impact piscicide collected the a were of using effects course on water effects. study of wegian ecosystem six-year using a eradication wider report potential when The we detect particularly biodiversity. Here, to strategy, native needed abundantly conservation are are to controversial effects surveys short-term threats a While long-term damage. are largest documented, collateral ecosystem hosts the whole involving of of methods indiscriminate culling one by as parasites regarded non-native are P. Antti invasions work. Biological field the manuscript. assisting the for of Sjursen draft D. support. earlier Abstract Aslak financial an and for on Rønning Nordland comments Lars valuable of Daverdin, gave Governor County Mark Eloranta the to and grateful Agency are We Environment Norwegian the thank We | INTRODUCTION < n ot)o ogtr ie oryas ffcso rotenone of effects years) four (i.e. long-term or month) one 2 Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. h rtrtnn ramn n ne nAtm 06 noeve ftmso apigadrotenone and sampling of times of overview An one 2016. before as 2011 Autumn well August as The in in started 2016, ended Sampling lotic to and time. two 2011 treatment. treatment lake at from third the conducted rotenone autumn after a was the first months Sampling eight treated during the 2013, watercourse 1). be June upstream each (Figure in in the to sampling site stations spring of Fusta control sampling treatment a River lentic with subsequent as three downstream watercourse, one used and the the and was in watercourse 2012) causing Drevja conducted and 2012), neighboring were 2011 treatments (August (October Fusta rotenone Fustvatnet River Three Lake the was fish. of Rotenone salmonid treatments parasite invasive two 2020). of the al., populations eradicate et host to (Josefsson its watercourse design Fusta Before-After-Control-Impact the a in using used study the performed We ohwtrore r uruddb preyvgttdmuti ra,src oiae oet and forests dominated spruce areas, mountain 2.2 mean vegetated a has sparsely river by The farmlands. surrounded sea. scattered the are to drains watercourses and Both long km m 17.7 12 is Drevvatn of Lake discharge of annual of outlet the area 55 is of catchment which 2014 Drevjaelva, a August has in taken watercourse, samples Fusta km m the 34 5 bordering of of discharge is annual which km mean km 8.5 (untreated), a 178 is has watercourse Fustvatnet, 70 river Lake Drevja of The of 2014 The sea. outlet August the the in to is taken which drains Fusta, samples and River water long km from conditions. 11 phosphorus oligotrophic of indicate total area respectively, and surface nitrogen a km total has 1). 538 of a.s.l.), (Figure of m Norway area Northern (38 catchment in Fustvatnet situated a Lake are has courses watercourse water Fusta (control) Drevja The and treated) (rotenone Fusta The sites by Study watercourse. taxa control 2.1 key nearby we of a turnover Specifically, and temporal communities. watercourse and treated invertebrate abundance 2 rotenone benthic long-term consequences a the lentic long-term from on the series and treatment on time lotic rotenone comparing focused caused of on effects study impact treatment ecosystem this for long-term rotenone Therefore, tested assessing 2010). intensive studies al., be of rotenone an lack et of may of a (Vinson consequences currently parasites treatments long-term and is However, or rotenone It expected, damage. by accepted. are fish collateral less ecosystem invasive the appropriate be of may to as treatment disturbances spread accepted, Short-term continuous degree services. certain towards ecosystem years to and act several ecosystem take to the potentially to failing severe may of taxa 1999). consequences single (Kjærstad rotenone Madrigal, of year Long-term & recovery to a Mangum However, within sensitive 1997, 2018). occur particularly al., can al., density et are et invertebrate (Arnekleiv Pham benthic Ephemeroptera total closely 2004, breathing the among Arnekleiv, lentic of gill tolerance & Recovery in in of 2001). et differences al. abundant species Arnekleiv et species-specific often 1987, example, (Arnekleiv also al., For are are et which There taxa. Holocombe 2011). taxa-specific 1982, related Gastropoda, 2001, Arnekleiv, Marking, by al., and & & et explained Kjærstad (Chandler Odonata Arnekleiv tolerant al.,1997, be 1999, Coleoptera, rotenone may Madrigal, considered whereas & variation lotic are 2009), (Mangum rich habitats, the sensitive oxygen al., of rotenone 2019) in et be abundant Part al., to are Eriksen et 2009). in reported which Bellingan Trichoptera, al., reduction generally 1990, and large are include et Dudgeon, Plecoptera habitats, are often 1969, (Hamilton Ephemeroptera, there rotenone. Moore, effects reduction However, to & observed 95% levels. tolerance (Cook The to pre-treatment reduction 2015). to no up al., or comparted to little et invertebrates from Dalu benthic ranging 2001, of variations al., abundance et total Melaas the 1984, Aagaard, & | METHODS | td design Study 2 2 aeDevt 4 ...,telretadlwrotlk ntecthet a ufc area surface a has catchment, the in lake lowermost and largest the a.s.l.), m (47 Drevvatn Lake . n aiu et f4 .Cnetain fttlntoe n hshrsfo water from phosphorus and nitrogen total of Concentrations m. 40 of depth maximum a and 3 s -1 . μ / and g/L < 2 μ /,rsetvl,idct lgtohccniin.River conditions. oligotrophic indicate respectively, g/L, 3 2 h ags n oems aeo h catchment, the of lake lowermost and largest The . 2 n aiu et f6 .Concentrations m. 68 of depth maximum a and yoatlssalaris Gyrodactylus 3 s -1 . hog exterminating through μ / and g/L < 2 μ g/L, Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. n21.I oh21 n 06 200Alni amnsot eerlae,a ela 8,0 on of young 384,000 as well as released, eggs were salmon Atlantic smolts 187,000 salmon of Atlantic planting 12,000 by followed 2016, 2014) and Holthe, 2015 & both (Lo In 2013 in 2014. river in the in 2014). released al., were ( et salmon the (Adolfsen Atlantic in alpinus 2013 of linus ppm mid-October stocking by in 0.3-0.4 reestablished detected and rotenone was was ppm Fish of rotenone 0.1 breakdown No ( was the depths. parts CFT-Legumine all temperatures, deeper of at water the concentration ppm low in average depths to and the different layers Due 2013, Measurements at surface ppm. April 2010). and In 0.68 water al., slow. was surface et was concentration the (Finlayson 21 average 2014). in October fish the On sites Bardal, to and treatment. scattered & the not since over after (Moen and N-metylpyrrolidone and performed solvent rotenone invertebrates, during were the 2.5% to concentration and toxicity with rotenone piperonylbutoxid surface the L of synergist the except increases 25,800 the for used, contain former included was used not rotenone treatment the were 3.3% did L the of formula formula 96,600 where 3.3% CFT-Legumine which layer The A of areas. surface deeper L, the for 139,200 used 16 for was were Fustvatnet October L Lake 42,600 between and in minimum place waters desired CFT-Legumine took the of Fustvatnet was use 2014). Lake which total al., of hours, and et treatment several 2011 (Adolfsen rotenone of ppm in The period 7 L a to over 573 up ppm and reaching In 0.5 754 periodically than station. concentration, was higher Fusta sampling was River CFT-Legumine lowermost treated in of 15 our m rotenone CFT-Legumine approximately 12 were of was of was streams temperature downstream use flow sampling and water total just uppermost lakes (Stensli The The oxbow part respectively. our was middle releases. ponds, 2012, of part the adjacent point upstream in middle areas, local km and flowing the with 1 upper slow approximately in the of in situated riverbanks release river, was addition, the the release in and upper rotenone stations of station The two release from 2014). the period Wist, treatments 7-hour both & In a gradient. over 18 active place August 2.5% on took a performed with were CFT-Legumine Fusta formulation River rotenone of treatments rotenone The l pcmn ftermiigsml htdffrdmrhlgclyfo h pcmn ntesbsample, sub the counted. in and specimens taxon and the possible 2.4 from Coleoptera lowest morphologically for to differed identified (1995) that out, sample Holmen picked remaining were & the of Nilsson & specimens and Rinne All Plecoptera, (1987) for stereo Holmen All (1988) a Trichoptera, Lillehammer using Gl laboratory. unit for Ephemeroptera, the taxonomic for in (2017) possible (1996) lowest (1/10) Wiberg-Larsen the Engblom mm. sample to following each 0.25 identified samples and of and of The sorted microscope subsampling size were taken. subsequent subsample were mesh before the samples a in replicate ethanol invertebrates and five 96% station, frame in sampling cm preserved and m 25x25 were occasion 0.5 a sampling approximately of with of combination net area each kick an a sample, each using For collected were invertebrates Benthic h ttosi ahlk a iutdi hlee ra ihasbtaedmntdb nriogncand of inorganic One finer by 2.3 substrate. dominated the substrate lake dominated a each with mm) in 1. areas stations Table 4-64 sheltered the of in of size size Two situated (particle (particle was alga. substrate lake pebbles and organic pebbles each moss were and in river mm) areas stations of 64-256 exposed the patches of size scattered in (particle with situated cobbles and were by mm) dominated 4-64 areas size riffle (particle in situated were stations Riverine 1 Figure 1. Table in given is treatments e 20)frGsrpd.Tenme fseiesfo h u apewr hnmlile y10. by multiplied then were sample sub the from specimens of number The Gastropoda. for (2002) ¨ oer | | oeoetetetadfihreestablishment fish and treatment Rotenone apigadsml processing sample and Sampling n rw ru ( trout brown and ) 3 s -1 n21 n 1m 11 and 2011 in < am trutta Salmo m)adwt iteo oautcvegetation. aquatic no or little with and 2mm) 3 s -1 > n21.I h oe ato ie ut,tetetconcentration treatment Fusta, River of part lower the In 2012. in 0) epciey nJn 03 h ocnrto a eo 0.1 below was concentration the 2013, June In respectively. 10m), nLk utant he huadAlni amnsmolts salmon Atlantic thousand Three Fustvatnet. Lake in ) st 02n esrmnswr eo . p CFT-Legumine, ppm 0.5 below were measurements no 2012 2 a oee ihasmln uaino n iue At minute. one of duration sampling a with covered was 4 am salar Salmo ° uigbt ramnsadtewater the and treatments both during C nRvrFsaadAci hr ( charr Arctic and Fusta River in ) th 01adAgs 17 August and 2011 th n coe 20 October and th th 02uiga using 2012 02 The 2012. Salve- Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. b.Ti a lofudi h nrae ie fe h rtrvrtreatment river first the after river untreated the (Figure treatments Baetis in river two found and to the also after rhodani response shortly was decreased in This river differences treated 2013 the 2b). distinct June in in Ephemeroptera taxa. masks of river invertebrate abundance abundance treated benthic The total the riverine treated in in of the decline treatment response both pronounced rotenone observed from a lake samples the by the in However, followed observed 2012, taxa 3a). October of abundance in (Figure the river in untreated increase the marked and a was 3c). there (figure contrast, In respectively) -37%, in and strongly whereas (+17% decreased respectively), river 3 92%, Plecoptera untreated and Figure of the (89% treatment abundance in river rotenone smaller the second two were and exception, the first changes following an the taxa the As after most immediately were on river 3). There abundance treated (Figure the the 3a). Fusta or (Figure abundance River indices total of turnover the treatments temporal on the effects reflects short-term invertebrates clear to benthic no 2013 of abundance June total from The found highest 2). were its and occurrence was 1 at species river Appendix gain-rate or 2 treated b, abundance and Figure the 2a, in 2e) changes (Figure of (Figure significant river loss-rate No 2013 untreated species the 2). June a The in Appendix to was 2f, 2). 2012 there (Figure treatment Appendix October 2013 data, lake 2d, August the from presence-absence (Figure after For highest 2015 immediately its from August 2b). signifi- to at river until (Figure changed 2012 treated 2012 Fusta losses the October October River in to in in occurrences treated due treatment species mainly rotenone rotenone of abun- lake 1), the dissimilarity for the significant of Appendix especially after 2a, abundances river, period invertebrate (Figure untreated the cantly benthic and was where treated exception the 2013 The in summer 2). co-vary (Figure to data appeared dance turnover species temporal The Rivers site. specimens of each number at to average Results as expected period expressed is sampling is treatment each taxon rotenone invertebrate for to each kick-sample al., of Responses per et abundance separately. The (Dray habitat “adespatial” lake habitats. package among and vary R riverine from the data The in analyzed done correction. We were Holm tests using (based significance rate p-values D% and error The the indices family-wise t-test. 2019). for the TBI paired for the as a data controlled of with same presence-absence were calculations significance and the permutations) for abundances random is tested in 9999 data, were Differences upon occasions details). presence-absence more sampling using for subsequent index, (2019) among higher Sorensen Legendre is (see the that above taxa for outlined common equation the The of higher periods. abundance is of that period part abundance sampling the the is both (D B in at difference periods. samples found sampling in ab- percentage taxa two The all form the of between data. difference similarity abundance presence-absence percentage beta- the ( on the of temporal periods based using sum as sampling index indices, two measured Sorensen TBI between was the different ) period two and sampling data calculated subsequent We undance each (TBI). between index composition diversity taxa in trout Fustvatnet Changes brown Lake 93,000 In as 2018). well 2015). as al. al., 2014, et et of 2.5 (Holthe Holthe spring 2016 2014, the during in Holthe, released YOY & were (Lo 120,00 old, YOY and 2-year mainly 2015 charr, in Arctic salmon 35,000 Atlantic (YOY) year the | aaanalyses Data t i hnat than p erae ntetetdrvratrbt ramns n nteutetdriver untreated the in and treatments, both after river treated the in decreased sp. t i+1 n steusae u ftaxa of sum unscaled the is and t i+1 t hnat than i and t t i+1 i n steusae u ftaxa of sum unscaled the is and a enda D as defined was ) 5 losses %diff t ewe apigpros stepr of part the is C periods. sampling between i and BC/2++) hr sthe is A where (B+C)/(2A+B+C), = t i+1 gains hsrpeet h unscaled the represents This . . h Ephemeroptera The ewe h w sampling two the between Baetis %diff diff Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. ewe h ae,wt ihrvle ntetetdlk nAgs 03 uutadOtbr21,October 2014, October a and treatment, August differed 2013, the abundance August after in in variations lake months the treated eight onwards the 2013, and in values 2013 June higher decreased, August both In with From lakes in lakes, both lakes. Fustvatnet. 2012 the in both between Lake August abundance in to total treated occurred the 2011 rotenone decrease treatment, August the minor the from after in in shortly rotenone stronger 2012, the from October before but 50% In even about variations 5a). by major (Figure decreased showed lakes lakes abundances the the in i.e., invertebrates were treatment, benthic periods of abundances sampling total between The 5). indices abundance and 2015 occurrence for 4 August especially (Appendix species 4 in lake 4f), Figure or lake untreated and or abundance treated 4c treated of the (Figures in the terms lake for changes in in treated and and significant found losses the 2012 highest abundances for No August The highest taxa in generally 4d). in data. lake were and dissimilarity Gains untreated 4a as the 4b). (Figure measured (Figure in period study both occurred untreated the The turnover, abundance of 4). species temporal most (Figure greater throughout lakes untreated a occurrences and have species treated to the in tended co-vary lake to abundance, appeared highest turnover in species the treated decreased Temporal Fusta. the with also River treated in taxon and the decreased the occasions in Drevjaelva, (Elmidae) than Lakes sampling River beetles rate untreated lower all riffle much the the in a In of at recorded albeit abundance treatment. (Appendix was of 2013 the The in Hydrachnidia abundance following absent treatments. was the river, river taxon the treatment, untreated the and after lake the river abundances treated the In the after in Hydrachnidia months of 3). abundance eight river. low 2013, a treated and was treatment the June There river river in In treated second minimum the its the to at in 3f). subsequent was Oligochaeta increased (Figure Oligochaeta and of treatment treatment abundance lake river The first the abundance the The rivers. after 3e). among shortly (Figure river. treatment decreased considerably lake untreated the co-varied the after Chironomidae shortly in Chironomidae observed of of was abundance Trichoptera high (41%) of had months decline abundance rivers Eight Both the smaller of in but 3d). specimens (99%) corresponding (Figure few decrease the A a river dramatic was to only present. untreated a there Contrary and were was the river, there time in 3c). treated 2013, change river same the June (Figure treated not in in the river the did treatment in untreated at lake but decreased the the treatment while abundances after in Trichoptera lake river, minor, the Plecoptera were treated after of effect the immediately negative specimens the in 200 were than detected treatments, river more were of Plecoptera average specimens no an three treatment, only and lake 3c), the (Figure of included 2012 abundance September abundances to high reduced compared genus with 95% treatments, Taxa the with river decreased of both river river. after treated untreated river the the treated in the in in increase Plecoptera of an Isoperla abundance was the there in decrease whereas strong a river was treated There the in abundances in Ephemeroptera increase the an the years, to subsequent in the decline In of dramatic mainly present 2013. a increased, specimens June was few in there present a were treatment, only taxa lake with in 3b) the treatment (Figure after river lake months sp., treated in the eight the listed 2013, after in are June abundance Immediately Ephemeroptera In figures treatments. the river. river in treated the the presented after not shortly 2012, rivers high the October relatively like from was Ephemeroptera, taxa rivers other all both For of Abundances 3. Appendix treatment. first the after .rhodani B. p and sp. Nemoura .rhodani B. and Leuctra .muticus. B. .rhodani B. mhnmr borealis Amphinemura .dalecarlica H. eercre.Ms aawr rsn nteutetdrvradwt relatively a with and river untreated the in present were taxa Most recorded. were p hrl fe h aeteteti coe 02 h bnac fPlecoptera of abundance the 2012, October in treatment lake the after Shortly sp. a h nyEhmrpeawt eue bnac n a o eoddin recorded not was and abundance reduced with Ephemeroptera only the was and .dalecarlica H. oee,adciewsas on nteutetdrvr u eemost here but river, untreated the in found also was decline a However, . , Diura etgnadalecarlica Heptagenia iia nraeocre nutetdrvr naddition in river, untreated in occurred increase similar A . haohl nubila Rhyacophila p and sp. 6 Isoperla , and p nJn 03 ih otsafter months eight 2013, June In sp. Hydropsychidae Ephemerella p and sp. p,teaudnein abundance the sp., Micrasema Siphlonurus Diura sp., sp. Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. etoe aaaekont ertnn estv Egto-e ta. 98 reli ta. 01 Gladso 2001, above- al., the et Arnekleiv All 1978, lake. al., upstream et of the (Engstrom-Heg One sensitive of effect rotenone treatment immediate be minor. the to the was to known subsequently river are Still, Fusta taxa downstream River mentioned the lake. the from in the disappeared community from which Trichoptera invertebrate rotenone the benthic received was on also exception treatment Fusta rotenone treated River lake Ephemeroptera the treatment, the in the river abundance including in last decrease Drevjaelva, the marked River invertebrates a benthic showed untreated for genera taxa the minor few Plecoptera was a to 2012 Only compared and Fusta. 2011 river River August treated in rotenone treatments the rotenone in of impact immediate The Lake untreated in recorded was Corixidae Discussion No sporadically. treatment. occurred the Dytiscidae after Fustvatnet while genus lakes. Lake Drevvatnet, the both treated in of extent the similar especially in a and increased to varied Coleoptera, lake. generally and untreated Hydrachnidia and Corixidae the pre-treatment For 5f) in to (Figure 5e). higher compared Oligochaeta (Figure varied were of lakes abundance lake or The both treated change treatment. the in not the in treatment did after Chironomidae the it or of after whereas before abundances levels, changes Trichoptera the recorded minor few years, only only A subsequent were showed lake. In abundances, Chironomidae untreated 2016. low of the at in abundance in found peaked The treatment period all abundances treated same lake, the the the the treated in after lake, during the treatment untreated lake slightly lakes in the the increased treated taxa after both In Trichoptera family the in among the 2014. in decrease treatment whereas August pronounced abundances lake, change the in most highest not before the and The did had occurred 2013 Polycentropodidae October but August also 2012. lake In in abundance August treated recorded decreased and 5d). were the a 2011 (Figure in However, markedly August occasions lake. decreased between sampling untreated abundances across treatment, the varied the in lakes after both shortly no in 2012, treatment, abundances lake. untreated the the the Trichoptera, after in For months observed eight were of specimens 2013, few abundance genus June a the the In only whereas strong of and a lake. lake, was specimens untreated treated genus there few the The 2012, the a in October in recorded only in higher smaller were the treatment with much Plecoptera much the before generally 5c), was after just were shortly (Figure decline 2012 lake but abundances The October treated varied Plecoptera the in abundances In in except lake, lake. low decrease untreated treated generally the the was In in lake than 5c). treated (Figure the treatment in rotenone Plecoptera of abundance The lake. untreated treatment the the after from lake Except treated the in vulgata abundances increased with lake species included the samples after Ephemeroptera immediately to decreased lakes. compared In taxa lakes, untreated 2016. Ephemeroptera both August of in and abundance lower especially 2014 The was treatment, August abundances treatment. in the the the lake by treatment before treated lake just the caused taken the in mainly a after registered shortly abundances also was were 2012, pre-treatment There abundances October to High 5b). compared 6. (Figure 2013, Appendix lakes in June between in and lakes within Ephemeroptera both both in time abundance over high varied abundance Ephemeroptera The 5 Figure 2016. October and August and 2015 erae togyi uutadOtbr21 7%ad7% epciey,cmae o2014. to compared respectively), 71%, and (73% 2015 October and august in strongly decreased . etotlmluteolum Centroptilum Capnia Siphlonurus Siphlonurus Diura a h otmre eraei bnac ntetetdlk olwn h treatment, the following lake treated the in abundance in decrease marked most the had etotlmluteolum Centroptilum and p hr a omre eprlcag nteaudne fEhmrpeain Ephemeroptera of abundances the in change temporal marked no was there sp. Capnia p bnacso l aafo h ae o rsne ntefiue r listed are figures the in presented not lakes the from taxa all of Abundances sp. Isoperla haohl nubila, Rhyacophila , anshoraria Caenis ekdi oeo h er fe h ramn nteutetdlake. untreated the in treatment the after years the of some in peaked eas h ptemLk utantwstetdtomnh after months two treated was Fustvatnet Lake upstream the Because . ntetetdlk n etplbia nbt h rae and treated the both in Leptophlebiidae and lake treated the in and hc curda ihaudne nbt ies but rivers, both in abundances high at occurred which 7 peeavulgata Ephemera Callicorixa n yicdbels h abundances the beetles, dytiscid and oee,teaudneof abundance the However, . atsrhodani Baetis Nemoura n the and present. E. Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. h eooiaini em faudneo eti netbae ntetetdlk a at ecigpre- reaching fast, was lake treated the in invertebrates benthic of abundance of terms in recolonization The Ephemeroptera after the shortly both included luteolum abundances Drevvatnet, indicates C. Lake decreasing This untreated clearly lake. the with treated luteolum in Taxa untreated the not and in but rotenone. luteolum Fustvatnet, lake extent Centroptilum of Lake treated higher effect in the a negative treatment in to the a but both Thus, and treatment, observed changes lake was Hydrachnidia. unknown. natural the abundance and remain invertebrate after study Chironomidae benthic immediately this specious lake in total Trichoptera, the species of and as many recol- Plecoptera reduction such of to A Ephemeroptera, patterns level, species as recolonization all taxonomic such and before higher level, abundance longer a in species take Biodiversity to changes may to it data. taxa taxa while the some some fast, of identified and find- recolonize resolution have our will taxonomic pre-treatment We to level the to accordance genera onize. on in return and depend is family generally greatly This at abundances will measures. measured invertebrate recolonization composition Ephemeroptera overall the taxonomic However, the and the ings. biodiversity (2010), taxa, the than al. tolerant quicker et levels rotenone Vinson two to Also, According 2016. Plecoptera rotenone treatments. in last The the the appeared after after recolonized. and years avoided had four have recolonize Ephemerella almost swift- taxa may drift to took Oligochaeta of the from slowest It drift rapidly of eggs. the substratum. the colonized as most the likely survived in into before have deeper groups groups treatment may digging These abundant by some like most exposure although 1988). taxa, rotenone the streams, Eikeland, Several tributary among & This untreated be (Brittain extent. in to streams great river. known temperate a untreated are flowing to the Plecoptera recovered and and had treated Ephemeroptera river the treated presence-absence for the and borealis similar of abundance fauna rather of Ephemeroptera terms benthic were the rotenone in levels. the occasions, composition, lake pre-treatment that taxa exceeded sampling the indicates in abundances treated between after change total the the the taxa in months 2014 2016, occurrence of eight August October species in river of and Already terms August treated in some 2013. In gains the August and highest in in abundances The occurred river recorded low fast. relatively very impacts was Most to recolonization negative treatment, receive decreased strong impacts. may taxa, the major rivers tolerant have Despite that mussel. rotenone can indicates pearl due which including freshwater This mainly lakes, the river, was like upstream invertebrates presence-absence. treated disappeared, of benthic The and the treatment in abundances in 2015). decline following significant, taxa (Larsen, This and taxa months of 2013 highest, several 2013. far terms of for June by spring in to rotenone were the 2012 both composition during October losses taxa died from to in river river changes treated treated the the the that in in confirms taxa diversity specimens several beta known and temporal all abundances 1995), ( low Ephemeroptera al., mussel very the untreatedet pearl at like the freshwater occurred species in the taxa tolerant occur that Chironomidae, rotenone Other by not dominated including did were beetles. missing, time decrease elmid this were similar at and river A lowest treated Nematoda the the river. recorded apparently in Oligochaeta, we community treated invertebrate exposure treatment, lake benthic the long the The in after the river. months decreases invertebrates 2015), eight rotenone benthic 2013, of al. June of effect In et toxic abundance the effect. Kjaerstad river negative though 1973, pronounced treated Even a (Meadows, the months. Consequently, had temperatures several light. water for limited lake decreasing Breakdown and the with temperatures from formed. low ice rotenone lake to to the due exposed before down was just slowed thus October, in was place rotenone took of Fustvatnet Lake of treatment expected. rotenone were The impacts negative and 2002) Raddum, & n lgcat ece uhhge bnacsi 03 scmae opetetetlevels. pre-treatment to compared as 2013, in abundances higher much reached Oligochaeta and sqietlrn Kartd&Ankev 01.Terao o h emnl ihsniiiyof sensitivity high seemingly the for reason The 2011). Arnekleiv, & (Kjaerstad tolerant quite is ortnn ntetetdlk sunknown. is lake treated the in rotenone to n li ete i o ece r-ramn bnacsi h rae ie oryears four river treated the in abundances pre-treatment reached not did beetles elmid and etgnadalecarlica Heptagenia n h Plecoptera the and agrtfr margaritifera Margaritifera Capnia and Ephemerella p While sp. 8 h Plecoptera the , Capnia skont ertnn oeat(Dolmen tolerant rotenone be to known is ) skont ertnn sensitive, rotenone be to known is anotrxnebulosa Taeniopteryx Ephemerella Isoperla oevr despite Moreover, . and Amphinemura eeamong were C. Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. dlsn . adi,M alr .(04.Rtnnnlsro euttr n ejmes av Bekjempelse In: resultater. og Rotenonanalyser (2014). T. 2-2014. Waaler, & salaris M. rodactylus Sandvik, P., cur- of Adolfsen, The effects the years. of recovery several investigation the for during References whereas lasting studies long-terms fast longer, de- invertebrates. performing much was where benthic of comparably communities treatment on importance invertebrate were lake rotenone the benthic species the underpins lake of after study on presence-absence rent abundance effects treatment. of invertebrate years) the terms of after four in months time eight (i.e. Recovery fauna long-term lotic or tected. the on short- effects major negative No temporary major community caused (i.e. the a treatment short-term etc., lake random our minor latitude how in found type, shows time. pattern study habitat given and same Our with any elsewhere the greatly at found vary see registered be will not be it certainly did may though We would for composition Even curve inclination river. accumulating present. little Utah taxa showed taxa a fewer genera rising of to invertebrate According sampling due benthic monthly 2012. perhaps for ten-year August curve data, to a invertebrate accumulation 2011 the during the August treatment, out (2010), from lake inver- flattening 50% the benthic al. approximately of before et by presence-absence Even Vinson reduced the to were localities. in lakes untreated and and both abundance when in treated the abundances sites both in of control fluctuations time large using over the of tebrates observe to treatment importance striking lake the the is the exception, illustrates It after an river This As untreated sites. the exposure. experiments. control in found time-series and rotenone than not impact stocking, river performing of removal/fish the treated was months in fish impacted species subsequent predation extent the the lower similar and The in and a a prominent treatments indicating to more rotenone fish. varied was treatment, the taxa from effect the Despite many predation after decrease of treatment. events to abundance The the sampling the due after all fish year. probably in from fish lake, previous occurred pressure but important treated the treatment, and the during the sized in stocked before large August 2015 fish of in in Abundance from invertebrates drastically predation benthic Ephemeroptera. to Ephemeroptera of to and contrary the abundances Chironomidae like lake, due prey, total for treated likely the high in most In particularly decrease was was river. strong treated levels, This a the the pre-treatment observed in in exceeded fish 2015. we fish and by lake, from was eaten abundances are pressure untreated fish in that predation if increased the taxa However, low taxa common relatively many other abundance. a of Instead, pre-treatment abundance indicating reach treatments. in not decrease the did a after expect taxa years 2010, would invertebrate we al., benthic driver, et few main Weyl the A ( ( 2014. (e.g. charr salmon in communities Arctic Atlantic lake invertebrate whereas of benthic 2016, Stocking and structuring 2013 2017). in Kraft, role & important Alexiades an of ”briefly play decline or may non-missing“ the Fish as” identified 1999). 1997), were Madrigal, rotenone al., Ephemeroptera, to & like tolerant (Mangun et groups, were sensitive missing“ that Arnekleiv rotenone Taxa to Trichoptera. belonged 1987, and most Plecoptera treatments, al., rotenone after et Considering years five treatment. (Holocombe missing the after tolerant years also acronicus four rotenone lake will G. treated are the Some in Gastropoda levels pre-treatment the the that their 1978). treatments, after reached the abundance not following al., years had invertebrate the et and in during increase abundance (Engstrom-Heg in general tolerant increased the Plecoptera taxa (Dytiscidae). rotenone most of beetles though very diving because Even the availability the in be recolonization. for prey treatment evident increased to the particularly from was after known benefit This abundance generally in lake. untreated increased are the few Beetles in A not treatment. but the lake, treated after months eight levels treatment Capnia ntetetdlk a upiig agn&Mdia 19)fudta fsvrltaxa several of that found (1999) Madrigal & Mangun surprising. was lake treated the in esaeinn Es .H tnl .Bra) eeiarntttesrapportserie Veterinaerinstituttets Bardal). H. & Stensli H. J. (Eds: Vefsnaregionen. i h rcotr oyetooia n h Gastropoda the and Polycentropodidae Trichoptera the , peeavulgata Ephemera .alpinus S. < n ot)eet ftervrrtnn ramns hra the whereas treatments, rotenone river the of effects month) one nrae oahg bnac n21-04 u decreased but 2013-2014, in abundance high a to increased , n rw ru ( trout brown and ) 9 .salar S. okpaei h rae ie between river treated the in place took ) .trutta S. yalsacronicus Gyraulus eesokdi h treated the in stocked were ) decreased Gy- Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. nbo,E 96 peeotr,Myis n qai net fNrhErp.Atxnmchandbook. taxonomic A Stenstrup. Books, Europe. North Apollo of Nilsson). insects A. Aquatic drift (Ed: In: invertebrate 1. 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No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. rtnn rae)adLk rvant(nrae)i h eid21-06 )Ttlaudne b) abundance, Total A) rotenone Fustvatnet the Lake of 2011-2016. Timing of arrow. Oligochaeta. period an invertebrates f) with the and benthic marked Chironomidae in is e) of Trichoptera, treatment (untreated) d) deviation) Drevvatnet Plecoptera, c) standard Lake Ephemeroptera, and (with minimum and treated) abundance gains maximum (rotenone indicate stations. and Average vertical bars sampling e) Dashed 5 Error individual and (untreated). at lake. (b FIGURE Drevvatnet indices the losses biodiversity Lake of components; treatment temporal black: its rotenone the treated), and the of d) of (rotenone values presence- Fustvatnet timing and for Lake the (a and indicate grey: occasions c) lines sampling – f). between (a and data f) (c abundance – for (d difference) data (% absence dissimilarity in changes marked Mean are treatments 4 rotenone FIGURE c) of Epemeroptera, Timing b) abundance, Oligochaeta. total (rotenone f) arrows. a) Fusta and with River Chironomidae 2011-2016. of e) period Trichoptera, invertebrates the d) benthic in Plecoptera, of (untreated) Drevjaelva deviation) River standard (c and (with indices treated) gains abundance diversity Average and in 3 the e) FIGURE differences of and values Significant minimum lines Drevjaelva). (b River and vertical losses stations. in maximum Dashed detected sampling indicate components; (p (untreated). bars individual its periods Drevjaelva Error sampling at and River between treatments. indices d) black: rotenone biodiversity and treated), the temporal (rotenone of (a presence-absence Fusta timing for occasions River and the c) sampling indicate Grey: the – between (a of data f). treatment f) in abundance and the Fusta for – of difference) River (d (% limit of dissimilarity upstream data treatment in the changes the position Mean indicates of the 2 bar FIGURE limit indicate black upstream Triangles single 2012. the a October and indicates Drevja. in 2012, bar and watercourse August black Fusta and double watercourses 2011 A studied August two stations. the sampling of of Overview 1 FIGURE captions Figure responses-of-benthic-invertebrates-to-rotenone-treatment image1.emf Lake Drevjaelva, River Fusta, River file in Hosted (black) treatments rotenone Drevvatnet and Lake (grey) and sampling Fustvatnet of Time 1 TABLE bass largemouth of Tables effect The 2010 Does Science Years, (2010). Aquatic O.L.F. 70 of Weyl, After & Journal M.P. Invertebrates: Hill, C., and salmoides F. Piscicides Moor, de P.S.R., (2010). Weyl, D.K. Bardal, & Vinson, J.H. & Know? Really Stensli, E.C. Anyone Dinger, In: M.R., Vefsnfjorden. Vinson, Indre sone i Behandlingene 2-2014. av naerinstituttetsrapportserie Bekjempelse (2014). A.N. (eds.). Wist, H. & J.H. Stensli, nautcmconetbaecmuiisi h i ie,EsenCp,SuhAfrica. South Cape, Eastern River, Wit the in communities macroinvertebrate aquatic on vial at available ihre 35 Fisheries yoatlssalaris Gyrodactylus < .5 nRvrFsaaemre ihge seik(osgicn differences signifcant (no asterisk grey with marked are Fusta River in 0.05) 5 7–8.https://doi.org/10.2989/16085914.2010.540776 273–281. 35, , https://authorea.com/users/426555/articles/531027-long-term- 17.https://doi.org/10.1577/1548-8446-35.2.61 61-71. , esaeinn Es .H tnl .Bra) Veteri- Bardal). H. & Stensli H. J. (Eds: Vefsnaregionen. i 13 Micropterus African Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. 14 Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. 15 Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. 16 Posted on Authorea 20 Jul 2021 — The copyright holder is the author/funder. All rights reserved. No reuse without permission. — https://doi.org/10.22541/au.162679471.13672315/v1 — This a preprint and has not been peer reviewed. Data may be preliminary. 17