3 results on '"Elisabeth Weingartner"'
Search Results
2. Exposing the structure of an Arctic food web
- Author
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Claus Rasmussen, Tomas Roslin, Peter A. Hambäck, Eero J. Vesterinen, Olivier Gilg, Jeroen Reneerkens, Elisabeth Weingartner, Helena Wirta, Niels Martin Schmidt, Department of Agricultural Sciences, Department of Biology, University of Turku, Department of Ecology, Environment and Plant Sciences, Stockholm University, Department of Bioscience, Aarhus University [Aarhus], Aarhus University [Aarhus]-Arctic Research Centre, Conservation Ecology Group, University of Groningen [Groningen]-Groningen Institute for Evolutionary Life Sciences, Groupe de recherche en écologie arctique (GREA), Biogéosciences [UMR 6282] [Dijon] (BGS), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Funding by INTERACT (projects QUANTIC and INTERPRED) under the European Community’s Seventh Framework Programme, by the University of Helsinki (grant number 788/51/2010), by the Academy of Finland (grant number 1276909), by Carl Tryggers Foundation for Scientific Research, by Kone Foundation, by World Wildlife Fund – the Netherlands, by the French Polar Institute – IPEV (program 'Interactions'), by Turku University Foundation, by Emil Aaltonen Foundation, by Carlsbergfondet, and by Aage V. JensenCharity Foundation., Spatial Foodweb Ecology Group, Groupe de recherche en écologie arctique ( GREA ), Biogéosciences [Dijon] ( BGS ), Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Centre National de la Recherche Scientifique ( CNRS ), and Piersma group
- Subjects
MUTUALISTIC NETWORKS ,Plectrophenax ,Trophic species ,Population ,Greenland ,POLLINATION NETWORKS ,DIVERSITY ,Biology ,specialism ,Predation ,[SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems ,generalism ,DNA barcoding ,education ,Predator ,Ecology, Evolution, Behavior and Systematics ,BEAR ISLAND ,Nature and Landscape Conservation ,Trophic level ,Pardosa ,Original Research ,education.field_of_study ,[ SDE.BE ] Environmental Sciences/Biodiversity and Ecology ,MOLECULAR-DETECTION ,GLOBAL PATTERNS ,Calidris ,Ecology ,15. Life on land ,HOST-SPECIFICITY ,biology.organism_classification ,Hymenoptera ,Food web ,[ SDV.EE.ECO ] Life Sciences [q-bio]/Ecology, environment/Ecosystems ,Arctic ,1181 Ecology, evolutionary biology ,molecular diet analysis ,APPARENT COMPETITION ,ta1181 ,Xysticus ,HERBIVOROUS INSECTS ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,TROPICAL FOREST - Abstract
15 pages; International audience; How food webs are structured has major implications for their stability and dynamics. While poorly studied to date, arctic food webs are commonly assumed to be simple in structure, with few links per species. If this is the case, then different parts of the web may be weakly connected to each other, with populations and species united by only a low number of links. We provide the first highly resolved description of trophic link structure for a large part of a high-arctic food web. For this purpose, we apply a combination of recent techniques to describing the links between three predator guilds (insectivorous birds, spiders, and lepidopteran parasitoids) and their two dominant prey orders (Diptera and Lepidoptera). The resultant web shows a dense link structure and no compartmentalization or modularity across the three predator guilds. Thus, both individual predators and predator guilds tap heavily into the prey community of each other, offering versatile scope for indirect interactions across different parts of the web. The current description of a first but single arctic web may serve as a benchmark toward which to gauge future webs resolved by similar techniques. Targeting an unusual breadth of predator guilds, and relying on techniques with a high resolution, it suggests that species in this web are closely connected. Thus, our findings call for similar explorations of link structure across multiple guilds in both arctic and other webs. From an applied perspective, our description of an arctic web suggests new avenues for understanding how arctic food webs are built and function and of how they respond to current climate change. It suggests that to comprehend the community-level consequences of rapid arctic warming, we should turn from analyses of populations, population pairs, and isolated predator-prey interactions to considering the full set of interacting species.
- Published
- 2015
- Full Text
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3. Species delimitation of the Hyphydrus ovatus complex in western Palaearctic with an update of species distributions (Coleoptera, Dytiscidae)
- Author
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Jiří Hájek, Johannes Bergsten, and Elisabeth Weingartner
- Subjects
0106 biological sciences ,0301 basic medicine ,Slovakia ,Insecta ,Biologisk systematik ,Arthropoda ,Turkey ,reciprocal monophyly ,Biodiversity ,Zoology ,Dytiscidae ,Biological Systematics ,GMYC ,010603 evolutionary biology ,01 natural sciences ,03 medical and health sciences ,Monophyly ,lcsh:Zoology ,Animalia ,Hyphydrus ,lcsh:QL1-991 ,Hyphydrus ovatus ,Hyphydrus ovatusAnimalia ,Ecology, Evolution, Behavior and Systematics ,biology ,Null model ,Ecology ,Hyphydrus anatolicus ,Western Palaearctic ,new records ,Palaearctic region ,biology.organism_classification ,Coleoptera ,030104 developmental biology ,species delimitation ,Animal Science and Zoology ,ColeopteraAnimalia ,Ukraine - Abstract
The species status of Hyphydrus anatolicus Guignot, 1957 and H. sanctus Sharp, 1882, previously often confused with the widespread H. ovatus (Linnaeus, 1760), are tested with molecular and morphological characters. Cytochrome c oxidase subunit 1 (CO1) was sequenced for 32 specimens of all three species. Gene-trees were inferred with parsimony, time-free bayesian and strict clock bayesian analyses. The GMYC model was used to estimate species limits. All three species were reciprocally monophyletic with CO1 and highly supported. The GMYC species delimitation analysis unequivocally delimited the three species with no other than the three species solution included in the confidence interval. A likelihood ratio test rejected the one-species null model. Important morphological characters distinguishing the species are provided and illustrated. New distributional data are given for the following species: Hyphydrus anatolicus from Slovakia and Ukraine, and H. aubei Ganglbauer, 1891, and H. sanctus from Turkey.
- Published
- 2017
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