Reconstructing Baselines for Caribbean Predatory Reef Fishes Valdivia Et Al
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Reef Fish Biodiversity in the Florida Keys National Marine Sanctuary Megan E
University of South Florida Scholar Commons Graduate Theses and Dissertations Graduate School November 2017 Reef Fish Biodiversity in the Florida Keys National Marine Sanctuary Megan E. Hepner University of South Florida, [email protected] Follow this and additional works at: https://scholarcommons.usf.edu/etd Part of the Biology Commons, Ecology and Evolutionary Biology Commons, and the Other Oceanography and Atmospheric Sciences and Meteorology Commons Scholar Commons Citation Hepner, Megan E., "Reef Fish Biodiversity in the Florida Keys National Marine Sanctuary" (2017). Graduate Theses and Dissertations. https://scholarcommons.usf.edu/etd/7408 This Thesis is brought to you for free and open access by the Graduate School at Scholar Commons. It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Scholar Commons. For more information, please contact [email protected]. Reef Fish Biodiversity in the Florida Keys National Marine Sanctuary by Megan E. Hepner A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science Marine Science with a concentration in Marine Resource Assessment College of Marine Science University of South Florida Major Professor: Frank Muller-Karger, Ph.D. Christopher Stallings, Ph.D. Steve Gittings, Ph.D. Date of Approval: October 31st, 2017 Keywords: Species richness, biodiversity, functional diversity, species traits Copyright © 2017, Megan E. Hepner ACKNOWLEDGMENTS I am indebted to my major advisor, Dr. Frank Muller-Karger, who provided opportunities for me to strengthen my skills as a researcher on research cruises, dive surveys, and in the laboratory, and as a communicator through oral and presentations at conferences, and for encouraging my participation as a full team member in various meetings of the Marine Biodiversity Observation Network (MBON) and other science meetings. -
Fish Biomass in Tropical Estuaries: Substantial Variation in Food Web Structure, Sources of Nutrition and Ecosystem-Supporting Processes
Estuaries and Coasts DOI 10.1007/s12237-016-0159-0 Fish Biomass in Tropical Estuaries: Substantial Variation in Food Web Structure, Sources of Nutrition and Ecosystem-Supporting Processes Marcus Sheaves1,2 & Ronald Baker1,2 & Kátya G. Abrantes1 & Rod M. Connolly3 Received: 22 January 2016 /Revised: 1 June 2016 /Accepted: 27 August 2016 # Coastal and Estuarine Research Federation 2016 Abstract Quantification of key pathways sustaining ecosys- sources of nutrition and probably unequal flow of productivity tem function is critical for underpinning informed decisions into higher levels of the food web in different parts of the on development approvals, zoning and offsets, ecosystem res- estuary. In turn, this suggests substantial qualitative and quan- toration and for meaningful environmental assessments and titative differences in ecosystem-supporting processes in dif- monitoring. To develop a more quantitative understanding of ferent estuary reaches. the importance and variation in food webs and nutrient flows in tropical estuaries, we investigated the spatio-temporal dis- Keywords Mangrove . Nekton . Penaeid . Spatial tribution of biomass of fish across 28 mangrove-lined estuar- prioritisation . Restoration . Offset ies in tropical Australia. We evaluated the extent to which nekton biomass in tropical estuaries responded to spatial and temporal factors and to trophic identity. Biomass was domi- Introduction nated by two trophic groups, planktivores and macrobenthos feeders. Contributions by other trophic groups, such as Although their high productivity and nursery-ground values detritivores and microbenthos feeders, were more variable. make estuaries and their associated wetlands among the most Total biomass and the biomass of all major trophic groups valuable ecosystems on the planet (Choi and Wang 2004; were concentrated in downstream reaches of estuaries. -
Size-Based Responses of Prey to Piscivore Exclusion in a Species-Rich Neotropical River
Ecology, 85(5), 2004,pp. 1311-1320 @ 2004 by the Ecological Society of America SIZE-BASED RESPONSES OF PREY TO PISCIVORE EXCLUSION IN A SPECIES-RICH NEOTROPICAL RIVER CRAIG A. LAYMAN! AND KIRK O. WINEMILLER Section of Ecology and Evolutionary Biology, Department of Wildlife and Fisheries Sciences, 210 Nagle Hall, Texas A&M University, College Station, Texas 77843-2258 USA Abstract. Characteristics used to group species, and thus generalize ecological inter': actions, can aid in constructing predictive models in species-rich food webs. We tested whether size could be used to predict a behavioral response of multiple prey species (n > 50) to exclusion of large-bodied fishes, including seven abundant piscivore species, in a lowland Neotropical river. A randomized block design (n = 6) included three experimental treatments constructed on sandbank habitats: large fish exclusion, cage control (barrier with gaps), and natural reference plot (no barrier). Exclosures prevented passage of all large- bodied fishes, but the mesh size allowed passage of prey fishes. After two weeks, exper- imental areas were sampled once during the day and once at night. Total abundance of prey fishes was not significantly different among treatments, and effects on specie~density were variable. Analyses based on fish size class, however, demonstrated significant size- based effects of large-fish exclusion. Abundance of medium fishes (40-110 mm) in exclu. sion treatments increased significantly relative to controls in day (248%) and night (91 %) samples, and this trend was apparent for many species (n > 13). Species density of medium fishes increased significantly in exclusion treatments. There was evidence of an intraspecific, size-dependent response for the three most common species. -
A Review of Planktivorous Fishes: Their Evolution, Feeding Behaviours, Selectivities, and Impacts
Hydrobiologia 146: 97-167 (1987) 97 0 Dr W. Junk Publishers, Dordrecht - Printed in the Netherlands A review of planktivorous fishes: Their evolution, feeding behaviours, selectivities, and impacts I Xavier Lazzaro ORSTOM (Institut Français de Recherche Scientifique pour le Développement eri Coopération), 213, rue Lu Fayette, 75480 Paris Cedex IO, France Present address: Laboratorio de Limrzologia, Centro de Recursos Hidricob e Ecologia Aplicada, Departamento de Hidraulica e Sarzeamento, Universidade de São Paulo, AV,DI: Carlos Botelho, 1465, São Carlos, Sï? 13560, Brazil t’ Mail address: CI? 337, São Carlos, SI? 13560, Brazil Keywords: planktivorous fish, feeding behaviours, feeding selectivities, electivity indices, fish-plankton interactions, predator-prey models Mots clés: poissons planctophages, comportements alimentaires, sélectivités alimentaires, indices d’électivité, interactions poissons-pltpcton, modèles prédateurs-proies I Résumé La vision classique des limnologistes fut de considérer les interactions cntre les composants des écosystè- mes lacustres comme un flux d’influence unidirectionnel des sels nutritifs vers le phytoplancton, le zoo- plancton, et finalement les poissons, par l’intermédiaire de processus de contrôle successivement physiqucs, chimiques, puis biologiques (StraSkraba, 1967). L‘effet exercé par les poissons plaiictophages sur les commu- nautés zoo- et phytoplanctoniques ne fut reconnu qu’à partir des travaux de HrbáEek et al. (1961), HrbAEek (1962), Brooks & Dodson (1965), et StraSkraba (1965). Ces auteurs montrèrent (1) que dans les étangs et lacs en présence de poissons planctophages prédateurs visuels. les conimuiiautés‘zooplanctoniques étaient com- posées d’espèces de plus petites tailles que celles présentes dans les milieux dépourvus de planctophages et, (2) que les communautés zooplanctoniques résultantes, composées d’espèces de petites tailles, influençaient les communautés phytoplanctoniques. -
Cascading Effects of Predator Richness
REVIEWS REVIEWS REVIEWS Cascading effects of predator richness John F Bruno1* and Bradley J Cardinale2 Biologists have long known that predators play a key role in structuring ecological communities, but recent research suggests that predator richness – the number of genotypes, species, and functional groups that com- prise predator assemblages – can also have cascading effects on communities and ecosystem properties. Changes in predator richness, including the decreases resulting from extinctions and the increases resulting from exotic invasions, can alter the composition, diversity, and population dynamics of lower trophic levels. However, the magnitude and direction of these effects are highly variable and depend on environmental con- text and natural history, and so are difficult to predict. This is because species at higher trophic levels exhibit many indirect, non-additive, and behavioral interactions. The next steps in predator biodiversity research will be to increase experimental realism and to incorporate current knowledge about the functional role of preda- tor richness into ecosystem management. Front Ecol Environ 2008; 6, doi:10.1890/070136 e know that predators play a vital role in maintain- the effects of changing biological richness at higher Wing the structure and stability of communities and trophic levels, and BEF research is rapidly expanding into that their removal can have a variety of cascading, indi- a more realistic, multi-trophic context (Duffy et al. 2007). rect effects (Terborgh et al. 2001; Duffy 2003; Figure 1). Here, we review the emerging field of predator biodi- But how important is predator richness? Are the numbers versity research, as well as the underlying mechanisms of predator genotypes, species, and functional groups eco- through which predator richness can affect lower trophic logically important properties of predator assemblages? levels and ecosystem properties. -
Identifying and Quantifying Environmental Thresholds for Ecological Shifts in a Large Semi- Regulated River
Journal of Freshwater Ecology ISSN: 0270-5060 (Print) 2156-6941 (Online) Journal homepage: http://www.tandfonline.com/loi/tjfe20 Identifying and quantifying environmental thresholds for ecological shifts in a large semi- regulated river Shawn M. Giblin To cite this article: Shawn M. Giblin (2017) Identifying and quantifying environmental thresholds for ecological shifts in a large semi-regulated river, Journal of Freshwater Ecology, 32:1, 433-453, DOI: 10.1080/02705060.2017.1319431 To link to this article: http://dx.doi.org/10.1080/02705060.2017.1319431 © 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group Published online: 19 May 2017. Submit your article to this journal Article views: 5 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=tjfe20 Download by: [Wisconsin Dept of Natural Resources] Date: 23 May 2017, At: 09:02 JOURNAL OF FRESHWATER ECOLOGY, 2017 VOL. 32, NO. 1, 433–453 https://doi.org/10.1080/02705060.2017.1319431 Identifying and quantifying environmental thresholds for ecological shifts in a large semi-regulated river Shawn M. Giblin Wisconsin Department of Natural Resources, La Crosse, Wisconsin, USA ABSTRACT ARTICLE HISTORY Ecological shifts, between a clear macrophyte-dominated state and a Received 23 January 2017 turbid state dominated by phytoplankton and high inorganic suspended Accepted 6 April 2017 solids, have been well described in shallow lake ecosystems. While few KEYWORDS documented examples exist in rivers, models predict regime shifts, Aquatic macrophytes; especially in regulated rivers with high water retention time. -
The Role of Threespot Damselfish (Stegastes Planifrons)
THE ROLE OF THREESPOT DAMSELFISH (STEGASTES PLANIFRONS) AS A KEYSTONE SPECIES IN A BAHAMIAN PATCH REEF A thesis presented to the faculty of the College of Arts and Sciences of Ohio University In partial fulfillment of the requirements for the degree Masters of Science Brooke A. Axline-Minotti August 2003 This thesis entitled THE ROLE OF THREESPOT DAMSELFISH (STEGASTES PLANIFRONS) AS A KEYSTONE SPECIES IN A BAHAMIAN PATCH REEF BY BROOKE A. AXLINE-MINOTTI has been approved for the Program of Environmental Studies and the College of Arts and Sciences by Molly R. Morris Associate Professor of Biological Sciences Leslie A. Flemming Dean, College of Arts and Sciences Axline-Minotti, Brooke A. M.S. August 2003. Environmental Studies The Role of Threespot Damselfish (Stegastes planifrons) as a Keystone Species in a Bahamian Patch Reef. (76 pp.) Director of Thesis: Molly R. Morris Abstract The purpose of this research is to identify the role of the threespot damselfish (Stegastes planifrons) as a keystone species. Measurements from four functional groups (algae, coral, fish, and a combined group of slow and sessile organisms) were made in various territories ranging from zero to three damselfish. Within territories containing damselfish, attack rates from the damselfish were also counted. Measures of both aggressive behavior and density of threespot damselfish were correlated with components of biodiversity in three of the four functional groups, suggesting that damselfish play an important role as a keystone species in this community. While damselfish density and measures of aggression were correlated, in some cases only density was correlated with a functional group, suggesting that damselfish influence their community through mechanisms other than behavior. -
Evidence for Ecosystem-Level Trophic Cascade Effects Involving Gulf Menhaden (Brevoortia Patronus) Triggered by the Deepwater Horizon Blowout
Journal of Marine Science and Engineering Article Evidence for Ecosystem-Level Trophic Cascade Effects Involving Gulf Menhaden (Brevoortia patronus) Triggered by the Deepwater Horizon Blowout Jeffrey W. Short 1,*, Christine M. Voss 2, Maria L. Vozzo 2,3 , Vincent Guillory 4, Harold J. Geiger 5, James C. Haney 6 and Charles H. Peterson 2 1 JWS Consulting LLC, 19315 Glacier Highway, Juneau, AK 99801, USA 2 Institute of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell Street, Morehead City, NC 28557, USA; [email protected] (C.M.V.); [email protected] (M.L.V.); [email protected] (C.H.P.) 3 Sydney Institute of Marine Science, Mosman, NSW 2088, Australia 4 Independent Researcher, 296 Levillage Drive, Larose, LA 70373, USA; [email protected] 5 St. Hubert Research Group, 222 Seward, Suite 205, Juneau, AK 99801, USA; [email protected] 6 Terra Mar Applied Sciences LLC, 123 W. Nye Lane, Suite 129, Carson City, NV 89706, USA; [email protected] * Correspondence: [email protected]; Tel.: +1-907-209-3321 Abstract: Unprecedented recruitment of Gulf menhaden (Brevoortia patronus) followed the 2010 Deepwater Horizon blowout (DWH). The foregone consumption of Gulf menhaden, after their many predator species were killed by oiling, increased competition among menhaden for food, resulting in poor physiological conditions and low lipid content during 2011 and 2012. Menhaden sampled Citation: Short, J.W.; Voss, C.M.; for length and weight measurements, beginning in 2011, exhibited the poorest condition around Vozzo, M.L.; Guillory, V.; Geiger, H.J.; Barataria Bay, west of the Mississippi River, where recruitment of the 2010 year class was highest. -
Why Pelagic Planktivores Should Be Unselective Feeders
J. theor. Biol. (1995) 173, 41-50 Why Pelagic Planktivores should be Unselective Feeders JARL GISKEt AND ANNE GRO VEA SALVANES University of Bergen, Department of Fisheries and Marine Biology, Hoyteknologisenteret, N-5020 Bergen and tlnstitute of Marine Research, Boks 1870 Nordnes, N-5024 Bergen, Norway (Received on 29 January 1994, Accepted in revised form on 18 July 1994) Diet width theory is a branch of optimal foraging theory, used to predict which fractions of the potential food encountered should be pursued. For pelagic fish, it is generally assumed that light is the dominant stimulus for both prey encounter rate and mortality risk. In order to achieve encounter rates allowing selective feeding, the pelagic predator exposes itself to enhanced predation risk for a prolonged time. The gain in growth obtained by diet selection may seldom outweigh the fitness cost of increased mortality risk. More generally, pelagic feeders will have a higher reproductive rate by searching the depth where feeding will be encounter-limited, and hence be opportunistic feeders. Literature reports of pelagic diet selection either fail to distinguish between the catchability of the prey in a gear and the encounter rate with its predator or neglects the vertical structure in pelagic prey distribution that may give differences in diets for unselective predators operating at different depths. The principal differences between the pelagic habitat and habitats where diet selection will be expected will include one or both of the following: (i) the continuous and steep local (i.e. vertical) gradients in mortality risk and (ii) the lack of local shelter where a newly ingested meal may safely be digested. -
The Role of Piscivores in a Species-Rich Tropical Food
THE ROLE OF PISCIVORES IN A SPECIES-RICH TROPICAL RIVER A Dissertation by CRAIG ANTHONY LAYMAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY August 2004 Major Subject: Wildlife and Fisheries Sciences THE ROLE OF PISCIVORES IN A SPECIES-RICH TROPICAL RIVER A Dissertation by CRAIG ANTHONY LAYMAN Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved as to style and content by: _________________________ _________________________ Kirk O. Winemiller Lee Fitzgerald (Chair of Committee) (Member) _________________________ _________________________ Kevin Heinz Daniel L. Roelke (Member) (Member) _________________________ Robert D. Brown (Head of Department) August 2004 Major Subject: Wildlife and Fisheries Sciences iii ABSTRACT The Role of Piscivores in a Species-Rich Tropical River. (August 2004) Craig Anthony Layman, B.S., University of Virginia; M.S., University of Virginia Chair of Advisory Committee: Dr. Kirk O. Winemiller Much of the world’s species diversity is located in tropical and sub-tropical ecosystems, and a better understanding of the ecology of these systems is necessary to stem biodiversity loss and assess community- and ecosystem-level responses to anthropogenic impacts. In this dissertation, I endeavored to broaden our understanding of complex ecosystems through research conducted on the Cinaruco River, a floodplain river in Venezuela, with specific emphasis on how a human-induced perturbation, commercial netting activity, may affect food web structure and function. I employed two approaches in this work: (1) comparative analyses based on descriptive food web characteristics, and (2) experimental manipulations within important food web modules. -
Interaction Between Top-Down and Bottom-Up Control in Marine Food Webs
Interaction between top-down and bottom-up control in marine food webs Christopher Philip Lynama, Marcos Llopeb,c, Christian Möllmannd, Pierre Helaouëte, Georgia Anne Bayliss-Brownf, and Nils C. Stensethc,g,h,1 aCentre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Lowestoft, Suffolk NR33 0HT, United Kingdom; bInstituto Español de Oceanografía, Centro Oceanográfico de Cádiz, E-11006 Cádiz, Andalusia, Spain; cCentre for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, NO-0316 Oslo, Norway; dInstitute of Hydrobiology and Fisheries Sciences, University of Hamburg, 22767 Hamburg, Germany; eSir Alister Hardy Foundation for Ocean Science, The Laboratory, Citadel Hill, Plymouth PL1 2PB, United Kingdom; fAquaTT, Dublin 8, Ireland; gFlødevigen Marine Research Station, Institute of Marine Research, NO-4817 His, Norway; and hCentre for Coastal Research, University of Agder, 4604 Kristiansand, Norway Contributed by Nils Chr. Stenseth, December 28, 2016 (sent for review December 7, 2016; reviewed by Lorenzo Ciannelli, Mark Dickey-Collas, and Eva Elizabeth Plagányi) Climate change and resource exploitation have been shown to from the bottom-up through climatic (temperature-related) in- modify the importance of bottom-up and top-down forces in fluences on plankton, planktivorous fish, and the pelagic stages ecosystems. However, the resulting pattern of trophic control in of demersal fish (11–13). Some studies, however, have suggested complex food webs is an emergent property of the system and that top-down effects, such as predation by sprat on zooplankton, thus unintuitive. We develop a statistical nondeterministic model, are equally important in what is termed a “wasp-waist” system capable of modeling complex patterns of trophic control for the (14). -
Emeraid Feeding Guidelines
Mixing Instructions for Various North American *Scoops of Emeraid Mixed Wild Animals *Use either the large end of the scoop with 60 cc of warm water (103-110°F) or the small end of the Adults Juveniles e e e † e e e r r r e r r r o o o r o o o v v v o v v v i i i v i i i n n b i n n b Taxa Natural foods of adults r r c r r m a e is m a e Aves O C H P O C H Blackbirds, Grackles, Cowbirds Seeds, insects 6 0 0 3 1 0 Bluebirds Insects, fruits 0 2 0 0 2 0 Chickadees, Titmouse Insects, seeds 1.5 1.5 0 0 2 0 Doves, Pigeons Seeds 6 0 0 4.5 0.5 0 Ducks–Mallard, Canvasback, Coots, Gadwall Vegetation, seeds, insects, molluscs 6 0 0 6 0 0 Ducks–Goldeneye, Bufflehead, Scoter Insects, crustacea, molluscs 0 2 0 3 0 2 0 Ducks–Scaup, Ruddy Aquatic vegetation, insects, crustacea 4.5 0.5 0 3 3 1 0 Finches, Siskins, Crossbills Seeds 6 0 0 6 0 0 Gamebirds–Grouse, Quail, Pheasant, Turkey Seeds, some insects 6 0 0 4.5 0.5 0 Grebes, Loons Fish, crustacea, molluscs 0 2 0 3 0 2 0 Geese Vegetation 3 0 2 4.5 0 1 TThehe FFirstirst S Elementalemi-Eleme nDiettal DSystemiet Syst eDesignedm Design fored Criticallyfor a Wid eIll VExoticsariety Gulls Fish, crustacea, molluscs 0 2 0 3 0 2 0 Jays, Magpies Seeds, insects 6 0 0 3 1 0 oWillf Cther nextitic severelyally debilitated Ill Exo animaltic beC ana amazon,rnivo a ferretres or, Han eiguana?rbi vExoticor eanimals a nd OmEmeraidnivo Omnivoreres Insects, fruits, seeds 1.5 1.5 0 0 2 0 Will the next severely debilitated animal be an Amazon, a ferret or an iguana? Exotic animal veterinarians are EProteinmera id Omnivore 20% ® Fat 9.5% Nuthatches Insects, seeds 1.5 1.5 0 0 2 0 pisre sdesignedented wit hto d quicklyifficult e mprovideergenci elife-savings every day elemental.