DOCSLIB.ORG

The Spatio-Temporal Dynamics of Epigaeic Predators and Insect Pests in Different Oilseed Rape Management Systems

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Spatio-Temporal Dynamics of Epigaeic Predators and Insect Pests in Different Oilseed Rape Management Systems The spatio-temporal dynamics of epigaeic predators and insect pests in different oilseed rape management systems Von der Fakultät für Lebenswissenschaften der Technischen Universität Carolo-Wilhelmina zu Braunschweig zur Erlangung des Grades einer Doktorin der Naturwissenschaften (Dr. rer. nat.) genehmigte Dissertation von Daniela Simone Felsmann aus Kiel 1. Referent: apl. Professor Dr. Stefan Schrader 2. Referent: Professor Dr. Otto Larink eingereicht am: 28.03.2007 mündliche Prüfung (Disputation) am: 04.10.2007 Druckjahr 2008 Teilergebnisse aus dieser Arbeit wurden mit Genehmigung der Fakultät für Lebenswissenschaften, vertreten durch den Mentor der Arbeit, in folgenden Beiträgen vorab veröffentlicht: Publikationen Felsmann, D.; Büchs, W. (2006): Epigäische Raubarthropoden in zwei unterschiedlichen Rapsanbausystemen. - Mitteilungen der Biologischen Bundesanstalt für Land- und Forstwirtschaft, 403, 90-101. Felsmann, D.; Büchs, W. (2006): Assessment of staphylinid beetle larvae from oilseed rape flower stands and their influence on pollen beetle larvae. – IOBC/wprs Bulletin, in press. Tagungsbeiträge Felsmann, D.; Büchs, W. (2004): Einfluss epigäischer Raubarthropoden auf Rapsschädlinge in zwei Rapsanbausystemen. - DGaaE-Nachrichten, 18 (3), 91. Felsmann, D.; Büchs, W. (2004): Vergleichende Untersuchungen von zwei Rapsanbausystemen hinsichtlich des Schädlingsbefalls und des Auftretens von epigäischen Prädatoren. - 54. Deutsche Pflanzenschutztagung in Hamburg, 20.-23. September. Mitteilungen der Biologischen Bundesanstalt für Land- und Forstwirtschaft 396, 278-279. Felsmann, D.; Büchs, W. (2005): Untersuchungen in zwei Rapsanbausystemen zum Auftreten von epigäischen Raubarthropoden und Rapsschädlingen. - Dresdner Entomologentagung, 21.-24. März, 220. Felsmann, D.; Büchs, W. (2005): Spatio-temporal relationships between epigaeic predators and insect pests in winter oilseed rape. - Verhandlungen der Gesellschaft für Ökologie 35, 164. Felsmann, D. & Büchs, W. (2006): The spatio-temporal within-field distribution of pest larvae and key predators in Germany and the predators' effect on the emergence of new pest generations. – International Symposium on Integrated Pest Management in Oilseed Rape, University of Göttingen, 3.-5. April. Felsmann, D., Schlein, O. & Büchs, W. (2006): Management-related web densities, predation rates and prey composition of spiders (Linyphiidae and Theridion impressum) in oilseed rape fields. – International Symposium on Integrated Pest Management in Oilseed Rape, University of Göttingen, 3.-5. April. Felsmann, D. & Büchs, W. (2006): Predation rates and assessment of staphylinid beetle larvae from oilseed rape flower stands and their role in the regulation of pollen beetle larvae. - International Symposium on Integrated Pest Management in Oilseed Rape, University of Göttingen, 3.-5. April. The spatio-temporal dynamics of epigaeic predators and insect pests in different oilseed rape management systems Daniela S. Felsmann Thanks to Eva for the loan of her stable event, You-know-who for a number of unstable events, my family for being stable through all events. The spatio-temporal dynamics of epigaeic predators and insect pests in different oilseed rape management systems List of contents Introduction ................................................................................................................ 1 1. Comparison of different winter oilseed rape management systems regarding the infestation of the crop with insect pests and the effects on the epigaeic predators - Introduction ............................................................................................................ 6 - Material and methods ............................................................................................ 7 - The oilseed rape management systems ..................................................... 7 - Experimental site....................................................................................... 7 - Experimental design.................................................................................. 9 - Plant dissections...................................................................................... 11 - Analytical statistics ................................................................................. 13 - Descriptive statistics................................................................................ 13 - Results ................................................................................................................... 15 Results of the plant dissections......................................................................... 15 - Plant architecture..................................................................................... 15 - Psylliodes chrysocephala........................................................................ 15 - Ceutorhynchus pallidactylus and C. napi ............................................... 16 - Dasineura brassicae and C. assimilis ..................................................... 17 Pest numbers in the oilseed rape management systems ................................... 25 - D. brassicae............................................................................................. 25 - Meligethes spp......................................................................................... 26 - C. assimilis, C. pallidactylus and C. napi ............................................... 27 Yield levels....................................................................................................... 29 Activity density of the epigaeic predators in the different oilseed rape management systems ................................................................................ 30 - Ground beetles (Carabidae)..................................................................... 30 - Rove beetles (Staphylinidae)................................................................... 39 - Spiders (Araneae).................................................................................... 43 Activity density of the epigaeic predators in the autumn ................................. 44 Emergence of the epigaeic predators in the winter wheat following the different oilseed rape management systems ..................................................... 45 Temporal coincidence between pest larval dropping and the activity density of the epigaeic predators in the different oilseed rape management systems... 47 - D. brassicae............................................................................................. 47 - Meligethes spp......................................................................................... 48 I The spatio-temporal dynamics of epigaeic predators and insect pests in different oilseed rape management systems - C. assimilis .............................................................................................. 49 - Discussion.............................................................................................................. 53 - Conclusions ........................................................................................................... 60 - Summary............................................................................................................... 61 - References ............................................................................................................. 62 - Appendix ............................................................................................................... 69 2. Assessment of the spatio-temporal within-field distribution of pest larvae and epigaeic predators in different oilseed rape management systems - Introduction .......................................................................................................... 70 - Material and methods .......................................................................................... 71 - Results ................................................................................................................... 73 Temporal coincidence between pest larval dropping and the activity density of the epigaeic predators................................................................................... 73 - D. brassicae............................................................................................. 73 - Meligethes spp......................................................................................... 78 - C. assimilis .............................................................................................. 83 Spatial distribution of pest larvae and epigaeic predators ................................ 88 Spatial association between predators and prey ............................................... 94 - between D. brassicae and the epigaeic predators ................................... 94 - between Meligethes spp. and the epigaeic predators............................... 97 - between C. assimilis and the epigaeic predators..................................... 98 - Discussion............................................................................................................ 100 - Conclusions ......................................................................................................... 104 - Summary............................................................................................................. 104 - References ........................................................................................................... 105 - Appendix ............................................................................................................
Load more

Recommended publications
  • Variations in Carabidae Assemblages Across The
    Original scientific paper DOI: /10.5513/JCEA01/19.1.2022 Journal of Central European Agriculture, 2018, 19(1), p.1-23 Variations in Carabidae assemblages across the farmland habitats in relation to selected environmental variables including soil properties Zmeny spoločenstiev bystruškovitých rôznych typov habitatov poľnohospodárskej krajiny v závislosti od vybraných environmentálnych faktorov vrátane pôdnych vlastností Beáta BARANOVÁ1*, Danica FAZEKAŠOVÁ2, Peter MANKO1 and Tomáš JÁSZAY3 1Department of Ecology, Faculty of Humanities and Natural Sciences, University of Prešov in Prešov, 17. novembra 1, 081 16 Prešov, Slovakia, *correspondence: [email protected] 2Department of Environmental Management, Faculty of Management, University of Prešov in Prešov, Slovenská 67, 080 01 Prešov, Slovakia 3The Šariš Museum in Bardejov, Department of Natural Sciences, Radničné námestie 13, 085 01 Bardejov, Slovakia Abstract The variations in ground beetles (Coleoptera: Carabidae) assemblages across the three types of farmland habitats, arable land, meadows and woody vegetation were studied in relation to vegetation cover structure, intensity of agrotechnical interventions and selected soil properties. Material was pitfall trapped in 2010 and 2011 on twelve sites of the agricultural landscape in the Prešov town and its near vicinity, Eastern Slovakia. A total of 14,763 ground beetle individuals were entrapped. Material collection resulted into 92 Carabidae species, with the following six species dominating: Poecilus cupreus, Pterostichus melanarius, Pseudoophonus rufipes, Brachinus crepitans, Anchomenus dorsalis and Poecilus versicolor. Studied habitats differed significantly in the number of entrapped individuals, activity abundance as well as representation of the carabids according to their habitat preferences and ability to fly. However, no significant distinction was observed in the diversity, evenness neither dominance.
    [Show full text]
  • Fauna Coleoptera Des Kreises Altenburg“ Vorgelegt Werden
    ©Mauritianum, Naturkundliches Museum Altenburg Mauritiana (Altenburg) 14 (1993) 3, S. 243-254 Fauna Coleóptera des Kreises Altenburg Zweite Ergänzung Erwin Naumann Zusammenfassung: Seit 1987 wurden im Kreis Altenburg 147 Käferarten erstmals nachgcwicscn und in die vorliegende Übersicht neben weiteren aufgenommen. Damit ergibt sich, daß in der Zeit 1838 — 1990 im untersuchten Gebiet ca. 1 800 Käferarten registriert wurden. Nach der Veröffentlichung der ersten Ergänzung im Jahre 1989 mit dem Stand der faunistischen Erfassung bis zum 31. 12. 1986 kann nun die zweite Ergänzung der „Fauna Coleoptera des Kreises Altenburg“ vorgelegt werden. Ich halte es für sinnvoll, auch für die zweite Ergänzung die bisherige Form bcizubchaltcn. Wenn bei verschiedenen Arten die Fundjahre noch in die Zeit der vorangegangenen Zusammenstellungen gehören, ist das darin begründet, daß die Determination dieser Exemplare erst später erfolgte oder die Fundmeldungen vorher nicht bekannt waren. Wie bisher weisen die Abkürzungen im Anschluß an die Fundort-Angabe daraufhin, daß Erwin Naumann (N) oder U lrich Poller (P) diese Art nachwiesen. Gehen Fundnachweise auf andere Personen zurück, ist das namentlich oder in Fußnoten vermerkt. Zwei Kreuze (+ + ) weisen darauf hin, daß diese Art erstmals im Kreisgebiet nachgewiesen wurden. Ein Kreuz (-(-) deutet einen neuen Fundort an, ohne Kreuz sind die Arten vermerkt, die seit längerer Zeit wieder nachgewiesen wurden. In dieser zweiten Ergänzung1) sind nur die Arten aufgenommen, die nach dem gegenwärtig gültigen und bekannten nomenklatorischen Stand bzw. von Koleopterologen determiniert wurden, deren fachliche Kompetenz anerkannt ist. So bedanke ich mich für die Determina­ tion der Käfer verschiedener Familien bei Herrn Dr. Scholz , Herrn Dr. Müller - Motzfeld , Herrn Dr. Hieke, Herrn Dr.
    [Show full text]
  • Three New Anchomenus BONELLI, 1810 from the West Palaearctic (Coleoptera: Carabidae: Platynini)
    ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Koleopterologische Rundschau Jahr/Year: 2014 Band/Volume: 84_2014 Autor(en)/Author(s): Schmidt Joachim Artikel/Article: Three new Anchomenus Bonelli, 1810 from the West Palaearctic. 13- 29 ©Wiener Coleopterologenverein (WCV), download unter www.zobodat.at Koleopterologische Rundschau 84 13–29 Wien, September 2014 Three new Anchomenus BONELLI, 1810 from the West Palaearctic (Coleoptera: Carabidae: Platynini) J. SCHMIDT Abstract Two new species of Ground Beetles (Coleoptera: Carabidae: Platynini) are described: Anchomenus bellus sp.n. from southern and eastern Turkey, and A. alcedo sp.n. from northern Israel and Lebanon. In external characters they are very similar to the western Turkey endemic A. dohrnii FAIRMAIRE, 1866, but differ distinctly each in male genitalic characters. A third new species of Anchomenus BONELLI is described from eastern Afghanistan: A. kataevi sp.n. The relationships of the new species are briefly discussed, and a key to the Palaearctic representatives of the genus Anchomenus is pro- vided. Anchomenus dorsalis infuscatus CHEVROLAT, 1854, formerly considered a junior synonym of A. dorsalis PONTOPPIDAN, 1763, is here regarded as a good subspecies. Key words: Coleoptera, Carabidae, Platynini, Anchomenus, Afghanistan, Israel, Syria, Lebanon, Turkey, new species, key to species. Introduction Based on comprehensive morphological and phylogenetic analyses of adult and larval
    [Show full text]
  • Lessons from Genome Skimming of Arthropod-Preserving Ethanol Benjamin Linard, P
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Archive Ouverte en Sciences de l'Information et de la Communication Lessons from genome skimming of arthropod-preserving ethanol Benjamin Linard, P. Arribas, C. Andújar, A. Crampton-Platt, A. P. Vogler To cite this version: Benjamin Linard, P. Arribas, C. Andújar, A. Crampton-Platt, A. P. Vogler. Lessons from genome skimming of arthropod-preserving ethanol. Molecular Ecology Resources, Wiley/Blackwell, 2016, 16 (6), pp.1365-1377. 10.1111/1755-0998.12539. hal-01636888 HAL Id: hal-01636888 https://hal.archives-ouvertes.fr/hal-01636888 Submitted on 17 Jan 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 1 Lessons from genome skimming of arthropod-preserving 2 ethanol 3 Linard B.*1,4, Arribas P.*1,2,5, Andújar C.1,2, Crampton-Platt A.1,3, Vogler A.P. 1,2 4 5 1 Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 6 5BD, UK, 7 2 Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot 8 SL5 7PY, UK, 9 3 Department
    [Show full text]
  • Effects of Pitfall Trap Preservative on Collections of Carabid Beetles (Coleoptera: Carabidae)
    The Great Lakes Entomologist Volume 40 Numbers 3 & 4 - Fall/Winter 2007 Numbers 3 & Article 6 4 - Fall/Winter 2007 October 2007 Effects of Pitfall Trap Preservative on Collections of Carabid Beetles (Coleoptera: Carabidae) Kenneth W. McCravy Western Illinois University Jason E. Willand U.S. Geological Survey Follow this and additional works at: https://scholar.valpo.edu/tgle Part of the Entomology Commons Recommended Citation McCravy, Kenneth W. and Willand, Jason E. 2007. "Effects of Pitfall Trap Preservative on Collections of Carabid Beetles (Coleoptera: Carabidae)," The Great Lakes Entomologist, vol 40 (2) Available at: https://scholar.valpo.edu/tgle/vol40/iss2/6 This Peer-Review Article is brought to you for free and open access by the Department of Biology at ValpoScholar. It has been accepted for inclusion in The Great Lakes Entomologist by an authorized administrator of ValpoScholar. For more information, please contact a ValpoScholar staff member at [email protected]. McCravy and Willand: Effects of Pitfall Trap Preservative on Collections of Carabid Be 15 4 THE GREAT LAKES ENTOMOLOGIST Vol. 40, Nos. 3 & 4 EFFECTS OF PITFALL TRAP PRESERVATIVE ON COLLECTIONS OF CARABID BEETLES (COLEOPTERA: CARABIDAE) Kenneth W. McCravy1 and Jason E. Willand2 ABSTRACT Effects of six pitfall trap preservatives (5% acetic acid solution, distilled water, 70% ethanol, 50% ethylene glycol solution, 50% propylene glycol solution, and 10% saline solution) on collections of carabid beetles (Coleoptera: Carabidae) were studied in a west-central Illinois deciduous forest from May to October 2005. A total of 819 carabids, representing 33 species and 19 genera, were collected. Saline produced significantly fewer captures than did acetic acid, ethanol, eth- ylene glycol, and propylene glycol, while distilled water produced significantly fewer captures than did acetic acid.
    [Show full text]
  • General Methods Will Be Outlined in Chapter 2
    The Biodiversity of Abandoned Farmland Tom Fayle Gonville and Caius College April 2005 This dissertation is submitted for the degree of Master of Philosophy Mating Six-spot Burnet moths (Zygaena filipendulae) on the Roughs Declaration This dissertation is the result of my own work and includes nothing which is the outcome of work done in collaboration except where specifically indicated in the text. This dissertation does not exceed the limit of 15000 words in the main text, excluding figures, tables, legends and appendices. i Acknowledgements This work was carried out on the land of Miriam Rothschild, who sadly passed away before its completion. I would like to thank her for allowing me to stay at Ashton Wold during my fieldwork and making me feel welcome there. I would also like to thank the Eranda Foundation for funding this work. Various people have helped with the identification of my material and I am very grateful to them for their time. Brian Eversham was of great help in identifying my carabids and also took time out from his busy schedule to assist me for a day during my time in the field. Ray Symonds dedicated a great deal of time to identifying all the spiders I caught, a feat which would have undoubtedly taken me many weeks! Richard Preece identified all my gastropods, and I am grateful both to him and his student George Speller for passing on the material to him. Roger Morris verified the identification of voucher specimens of all the syrphids I caught, and Oliver Prŷs-Jones did the same for my bumblebees.
    [Show full text]
  • Ground Beetle Assemblages on Illinois Algific Slopes: a Rare Habitat Threatened by Climate Change
    Ground Beetle assemblages on Illinois algific slopes: a rare habitat threatened by climate change by: Steven J. Taylor, Ph.D. Alan D. Yanahan Illinois Natural History Survey Department of Entomology University of Illinois at Urbana-Champaign 320 Morrill Hall 1816 South Oak Street University of Illinois at Urbana-Champaign Champaign, IL 61820 505 S. Goodwin Ave [email protected] Urbana, IL 61801 report submitted to: Illinois Department of Natural Resources Office of Resource Conservation, Federal Aid / Special Funds Section One Natural Resources Way Springfield, Illinois 62702-1271 Fund Title: 375 IDNR 12-016W I INHS Technical Report 2013 (01) 5 January 2013 Prairie Research Institute, University of Illinois at Urbana Champaign William Shilts, Executive Director Illinois Natural History Survey Brian D. Anderson, Director 1816 South Oak Street Champaign, IL 61820 217-333-6830 Ground Beetle assemblages on Illinois algific slopes: a rare habitat threatened by climate change Steven J. Taylor & Alan D. Yanahan University of Illinois at Urbana-Champaign During the Pleistocene, glacial advances left a small gap in the northwestern corner of Illinois, southwestern Wisconsin, and northeastern Iowa, which were never covered by the advancing Pleistocene glaciers (Taylor et al. 2009, p. 8, fig. 2.2). This is the Driftless Area – and it is one of Illinois’ most unique natural regions, comprising little more than 1% of the state. Illinois’ Driftless Area harbors more than 30 threatened or endangered plant species, and several unique habitat types. Among these habitats are talus, or scree, slopes, some of which retain ice throughout the year. The talus slopes that retain ice through the summer, and thus form a habitat which rarely exceeds 50 °F, even when the surrounding air temperature is in the 90’s °F, are known as “algific slopes.” While there are numerous examples of algific slopes in Iowa and Wisconsin, this habitat is very rare in Illinois (fewer than ten truly algific sites are known in the state).
    [Show full text]
  • The Evolution and Genomic Basis of Beetle Diversity
    The evolution and genomic basis of beetle diversity Duane D. McKennaa,b,1,2, Seunggwan Shina,b,2, Dirk Ahrensc, Michael Balked, Cristian Beza-Bezaa,b, Dave J. Clarkea,b, Alexander Donathe, Hermes E. Escalonae,f,g, Frank Friedrichh, Harald Letschi, Shanlin Liuj, David Maddisonk, Christoph Mayere, Bernhard Misofe, Peyton J. Murina, Oliver Niehuisg, Ralph S. Petersc, Lars Podsiadlowskie, l m l,n o f l Hans Pohl , Erin D. Scully , Evgeny V. Yan , Xin Zhou , Adam Slipinski , and Rolf G. Beutel aDepartment of Biological Sciences, University of Memphis, Memphis, TN 38152; bCenter for Biodiversity Research, University of Memphis, Memphis, TN 38152; cCenter for Taxonomy and Evolutionary Research, Arthropoda Department, Zoologisches Forschungsmuseum Alexander Koenig, 53113 Bonn, Germany; dBavarian State Collection of Zoology, Bavarian Natural History Collections, 81247 Munich, Germany; eCenter for Molecular Biodiversity Research, Zoological Research Museum Alexander Koenig, 53113 Bonn, Germany; fAustralian National Insect Collection, Commonwealth Scientific and Industrial Research Organisation, Canberra, ACT 2601, Australia; gDepartment of Evolutionary Biology and Ecology, Institute for Biology I (Zoology), University of Freiburg, 79104 Freiburg, Germany; hInstitute of Zoology, University of Hamburg, D-20146 Hamburg, Germany; iDepartment of Botany and Biodiversity Research, University of Wien, Wien 1030, Austria; jChina National GeneBank, BGI-Shenzhen, 518083 Guangdong, People’s Republic of China; kDepartment of Integrative Biology, Oregon State
    [Show full text]
  • Open Research Online Oro.Open.Ac.Uk
    Open Research Online The Open University’s repository of research publications and other research outputs The effect of habitat creation for predatory arthropods on aphid populations in winter wheat Thesis How to cite: Collins, Katherine Lucy (1999). The effect of habitat creation for predatory arthropods on aphid populations in winter wheat. PhD thesis The Open University. For guidance on citations see FAQs. c 1999 Katherine Lucy Collins Version: Version of Record Link(s) to article on publisher’s website: http://dx.doi.org/doi:10.21954/ou.ro.0000ff4f Copyright and Moral Rights for the articles on this site are retained by the individual authors and/or other copyright owners. For more information on Open Research Online’s data policy on reuse of materials please consult the policies page. oro.open.ac.uk ^^uucbcKvv. \Jt3Z<ssrRi£t&E) THE EFFECT OF HABITAT CREATION FOR PREDATORY ARTHROPODS ON APHID POPULATIONS IN WINTER WHEAT KATHERINE LUCY COLLINS BSc. (Hons.) ZOOLOGY A thesis submitted in partial fulfillment of the requirements of The Open University for the degree of Doctor of Philosophy Discipline: Agriculture / Environment MAY 1999 Harper Adams University College SpOEESomg es&blÊsbmDmt: and Food A Merton Research and Educational Trust Leicestershire ProQuest Number: C801604 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a com plete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest ProQuest C801604 Published by ProQuest LLC (2019).
    [Show full text]
  • DNA Metabarcoding Diet Analysis Reveals Dynamic Feeding Behaviour and Biological Control Potential of Carabid Farmland Co
    bioRxiv preprint doi: https://doi.org/10.1101/332312; this version posted May 27, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 Title: DNA metabarcoding diet analysis reveals dynamic feeding behaviour and biological 2 control potential of carabid farmland communities 3 4 5 STEFANIYA KAMENOVA1,2,3, VINCENT BRETAGNOLLE2, MANUEL 6 PLANTEGENEST1 & ELSA CANARD1 7 8 1UMR 1349 IGEPP, INRA, Université de Rennes 1, Agrocampus Ouest Rennes, Domaine de 9 la Motte, 35650 Le Rheu, France 10 2Centre d'Etudes Biologiques de Chizé, 79360 Villiers-en-Bois, France 11 3CEES, University of Oslo, 1066 Blindern, 0316 Oslo, Norway 12 13 Corresponding author: Stefaniya Kamenova 14 CEES, University of Oslo, 1066 Blindern, 0316 Oslo, Norway 15 [email protected] 16 17 18 Key-words: DNA metabarcoding diet analysis, carabid beetles, agroecosystems, biological 19 control, food webs 20 21 Running title: Dynamic feeding behaviour of carabid beetles revealed by DNA 22 metabarcoding 23 24 25 Abstract 26 27 Maximizing the delivery of key ecosystem services such as biological control through the 28 management of natural enemy communities is one of the major challenges for modern 29 agriculture. The main obstacle lies in our yet limited capacity of identifying the factors that 30 drive the dynamics of trophic interactions within multi-species assemblages. Invertebrate 31 generalist predators like carabid beetles are known for their dynamic feeding behaviour.
    [Show full text]
  • Dartington Report on Beetles 2015
    Report on beetles (Coleoptera) collected from the Dartington Hall Estate, 2015 by Dr Martin Luff 1. Introduction and Methods The majority of beetle recording in 2015 was concentrated on three sites and habitats: 1. Further sampling of moss on the Deer Park wall (SX794635), as mentioned in my 2014 report. This was done on two dates in March by MLL and again in October, aided by Messrs Tony Allen and Clive Turner, both experienced coleopterists. 2. Beetles associated with the decomposing body of a dead deer. The recently (accidentally) killed deer was acquired on 12th May by Mike Newby who pegged it out under wire netting in the small wood adjacent to 'Flushing Meadow', here referred to as 'Flushing Copse' (SX802625). The body was lifted regularly and beaten over a collecting tray, initially every week, then fortnightly and then monthly until early October. In addition, two pitfall traps were installed just beside the corpse, with a small amount of preservative in each. These were emptied each time the site was visited. 3. Water beetles sampled on 28th October, together with Tony Allen and Clive Turner, from the ponds and wheel-rut puddles on Berryman's Marsh (SX799615). Other work again included the contents of the nest boxes from Dartington Hills and Berrymans Marsh at the end of October, thanks to Mike Newby and his volunteer helpers. 2. Results In all, 203 beetle species were recorded in 2015, of which 85 (41.8%) were additions to the Dartington list. This increase over the 32% new in 2014 (Luff, 2015) results partly from sampling habitats (carrion, fresh-water) not previously examined.
    [Show full text]
  • Larval Omnivory in Amara Aenea (Coleoptera: Carabidae)
    Eur. J. Entomol. 100 : 329-335, 2003 ISSN 1210-5759 Larval omnivoryAmara in aenea (Coleoptera: Carabidae) Karel HŮRKA and V ojtěch JAROŠÍK Department ofZoology, Charles University, Viničná 7, CZ-128 44 Praha 2, Czech Republic; e-mail: [email protected] Key words. Carabids, Amara aenea, larval diet, life histories, seed predation Abstract. The duration of development, survivorship and adult size were compared for the larvae of Amara aenea reared in the first generation on pure diets of seeds ( Stellaria media, Capsella bursa-pastoris, Tussilago farfara, Plantago major, Urtica or dioica, Potentilla argentela), or a pure diet of yellow mealworms (Tenebrio molitor larvae), and on a mixed diet of seeds and mealworm larvae (T. molitor, S. media and C. bursa-pastoris). To ascertain any long-term effects of pure diets, the beetles were reared on the same pure diet for several generations, or on different pure diets in different generations. The hypothesis that the larvae are primary omnivorous was tested. The evidence that the larvae of A. aenea are primary omnivorous was obtained by revealing that the larvae reared on the mixed diet of insects and seeds survived better, and developed faster in larger adults than those reared on the pure diets of seeds or insects. When the beetles were reared on the same pure diet for several generations, survivorship, and in most cases also the duration of development, did not change. However, when the beetles were reared on a different pure diet each generation, survi­ vorship significantly decreased in successive generations. INTRODUCTION Recently, an investigation of nine closely related The adults of the genus Amara Bonelli (Coleoptera: Amara species suggested that their larvae can be divided Carabidae) are generally considered granivorous, since into granivorous, omnivorous and insectivorous forms many have been observed feeding on flower heads or (Saska & Jarošík, 2001).
    [Show full text]