Development of habitat models for Nephtys species (Polychaeta: Nephtyidae) in the German Bight (North Sea) |
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| Institution: | 1. iES, Institute of Environmental Sciences, University of Koblenz Landau, Fortstraße 7, 76829 Landau, Germany;2. Faculty of Biology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitätsstrasse 5, 45141 Essen, Germany;3. IHCantabria - Instituto de Hidráulica Ambiental de la Universidad de Cantabria- Avda, Isabel Torres, 15, Parque Científico y Tecnológico de Cantabria, 39011 Santander, Spain;4. Finnish Environment Institute, Freshwater Centre, P.O. Box 413, Paavo Havaksen tie 3, FI-90014 Oulu, Finland;5. Grup de Recerca “Freshwater Ecology, Hydrology and Management” (FEHM), Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Diagonal 643, 08028 Barcelona, Catalonia, Spain;6. Serra Húnter fellow, “Freshwater Ecology, Hydrology, and Management” (FEHM), Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Institut de Recerca de l''Aigua (IdRA), Universitat de Barcelona (UB), Diagonal 643, 08028 Barcelona, Catalonia, Spain;7. National Administration “Apele Romane”, Edgar Quinet 6, 010017 Bucharest, Romania;8. Water Research Institute, Nábrežie arm. gen. L. Svobodu 5,81249 Bratislava, Slovakia;9. Forest Research Centre and Associate Laboratory TERRA, Instituto Superior de Agronomia, Tapada da Ajuda, 1349-017 Lisboa, Portugal;10. Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Clamecystrasse 12, Gelnhausen 65371, Germany;11. Department of Ecology and Genetics, University of Oulu, P.O. Box 3000, Pentti Kaiteran katu 1, FI-90014 Oulu, Finland;12. Department of Zoology, School of Biology, Aristotle University of Thessaloniki, P.O. Box 134, 54124 Thessaloníki, Greece;13. Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10000 Zagreb, Croatia;14. Oulanka Research Station, University of Oulu Infrastructure Platform, Liikasenvaarantie 134, FI-93900 Kuusamo, Finland;15. Department of Environmental Monitoring, Chief Inspectorate for Environmental Protection, Aleje Jerozolimskie 92, 00-807 Warszawa, Poland;p. Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic;q. Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands;r. T. G. Masaryk Water Research Institute, p. r. i., Mojmírovo náměstí 16, 612 00 Brno, Czech Republic;s. Norwegian Institute for Water Research, Økernveien 94, NO-0579 Oslo, Norway;t. Balaton Limnological Research Institute, Klebelsberg Kuno u. 3, 8237 Tihany, Hungary;u. Université de Lorraine, CNRS, UMR 7360, LIEC, Laboratoire Interdisciplinaire des Environnements Continentaux, Rue du Général Delestraint, 57070 Metz, France;v. Department of Ecology and Hydrology, University of Murcia, Murcia, 30100, Espinardo Campus, Spain;1. Interdisciplinary Center for Archaeology and Evolution of Human Behaviour (ICArEHB), Universidade do Algarve, Campus Gambelas, 80005-139 Faro, Portugal;2. Primate Models for Behavioural Evolution, Institute of Cognitive and Evolutionary Anthropology, University of Oxford, 64 Banbury Road, Oxford OX2 6PN, United Kingdom;3. GeoZentrum Nordbayern, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schlossgarten 5, 91054 Erlangen, Germany;4. Institut für Geowissenschaften, Christian-Albrechts-Universität zu Kiel, Ludewig-Meyn-Str. 10, 24118 Kiel, Germany;5. Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany;6. Department of Organismal Biology and Anatomy, University of Chicago, 1027 E. 57th St., Chicago, IL 60637, USA;7. Department of Archaeology, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa;8. Evolutionary Studies Institute and School of Geosciences, University of the Witwatersrand, P Bag 3, WITS 2050, South Africa;9. Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, United Kingdom;10. Center for the Advanced Study of Human Paleobiology, George Washington University, 800 22nd St NW, Washington, DC 20052, USA;11. Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal;12. Organisms and Environment Division, School of Biosciences, Cardiff University, Biomedical Sciences Building, Museum Avenue, Cardiff CF10 3AX, United Kingdom;13. CIBIO/InBio, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Rua Padre Armando Quintas 7, 4485-661 Vairão, Portugal;14. Senckenberg Biodiversity and Climate Research Centre, Senckenberganlage 25, 60325 Frankfurt, Germany;15. Department of Biomaterials and Biomimetics, New York University College of Dentistry, 345 East 24th Street, NY 10010, USA;p. Faculdade de Letras e Ciencias Sociais, Universidade Eduardo Mondlane, Av. Julius Nyerere, 3453 Maputo, Mozambique;q. Programa de Antropología, Instituto de Sociología, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 6904411, Chile;r. Gorongosa National Park, Sofala, Mozambique;s. AESDA - Associação de Estudos Subterrâneos e Defesa do Ambiente, Portugal;t. National Science Foundation, 2415 Eisenhower Ave., Alexandria, VA 22314, USA;2. Institute for Ecology, Evolution and Diversity, Goethe-University, Frankfurt am Main, Germany;3. GM Mosquitoes Confined Release Facilities, PoloGGB, Terni, Italy;4. Environmental Toxicology and Medical Entomology, Institute of Occupational, Social and Environmental Medicine, Goethe-University, Frankfurt am Main, Germany |
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| Abstract: | The aim of the study was the development of habitat models for Nephtys species (Polychaeta: Nephtyidae). The investigation area was the German Bight, the southeastern part of the North Sea. Models were developed based on field data collected between 2000 and 2006. In addition, data on environmental variables were retrieved from long-term monitoring data sets and from the sediment map by Figge Figge, K., 1981. Nordsee. Sedimentverteilung in der Deutschen Bucht. Map No. 2900. Publisher: Deutsches Hydrographisches Institut, Hamburg]. The statistical modelling technique used was multivariate adaptive regression splines (MARS). Models were fitted individually for each species. Evaluation of predictive discrimination and predictive accuracy of the developed models was by calculation of the area under the receiver operating curve (AUC) or sensitivity and specificity, respectively. Habitat models with best predictive fit were selected for the presentation of habitat suitability maps.Six Nepthys species were found: Nephtys assimilis, N. caeca, N. cirrosa, N. hombergii, N. incisa and N. longosetosa. N. hombergii was most common whereas N. incisa and N. longosetosa were rare. Habitat preferences varied considerably among the species. For all investigated Nephtys species except N. longosetosa a habitat model could be developed based on four predictor variables. The habitat models with best predictive fit were those for N. cirrosa and N. hombergii. The N. caeca habitat model was of limited predictive accuracy and only accept predictive discrimination. The number of predictors as well as the relative importance of the respective predictors in the model varied among the different species. Direct comparison of most suitable habitats for the different species based on modelling revealed that in the mostly sandy regions parallel to the German coast in water depths up to 20 m an overlap between N. caeca, N. hombergii and N. cirrosa exists. In the deeper central German Bight with mostly fine sands with increased mud contents N. hombergii, N. assimilis and, at least partially and rare in numbers, N. incisa co-occur. It can be concluded that important sediment characteristics like grain size median and mud content as well as water depth and mean salinity are useful parameters to describe the habitat requirements of most Nepthys species in the German Bight. However, additional variables need to be incorporated into such analyses. |
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