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Characterization of benthic habitat settings in a lagoonal ecosystem using free-living nematodes as proxy

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Abstract

Free-living nematodes are sensitive to most of the disturbances and therefore have ability to reflect direct structural and functional changes in an ecosystem. We studied nematode assemblages of Chilika Lagoon, the largest lagoon of Asia, across spatio-temporal scales in link with environmental variables and evaluated nematode assemblages as a proxy to characterize lagoonal benthic habitat settings. Our results revealed that nematode communities showed significant variation spatially and temporally in terms of mean density (16–854/10 cm2) and mean number of species (7–74). Salinity is the key factor that controls nematode community structure across this lagoon and was strongly supported by statistical analyses. The observed nematode assemblages were further used as a proxy to assign benthic habitats of Chilika into distinct biological, topographical and hydrological settings. This study showed that nematode assemblages could be effectively used for long term ecological monitoring of dynamic sedimentary environment of lagoons globally.

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Acknowledgements

This work is supported by a grant awarded to Punyasloke Bhadury by Chilika Development Authority (CDA) through the financial support received from the World Bank supported Integrated Coastal Zone Management Project (ICZMP) of Odisha. We are also grateful to Integrative Taxonomy and Microbial Ecology Research Group members for helping us during field work.

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  1. Integrative Taxonomy and Microbial Ecology Research Group, Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata (IISERK), Mohanpur, Nadia, West Bengal, India

    Kapuli Gani Mohamed Thameemul Ansari & Punyasloke Bhadury

  2. Integrated Coastal Zone Management Project, Suryanagar, Bhubaneswar, Odisha, India

    Ajit Kumar Pattnaik

  3. Wetland Research and Training Centre, Chilika Development Authority, Barkul, Balugaon, Odisha, India

    Gurdeep Rastogi

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  1. Kapuli Gani Mohamed Thameemul Ansari
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  4. Punyasloke Bhadury
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Ansari, K.G.M.T., Pattnaik, A.K., Rastogi, G. et al. Characterization of benthic habitat settings in a lagoonal ecosystem using free-living nematodes as proxy. Wetlands Ecol Manage 26, 175–194 (2018). https://doi.org/10.1007/s11273-017-9564-9

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