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RESEARCH PRODUCT

Multiple-stressor effects of warming and acidification on the embryonic development of an estuarine fiddler crab

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Made available in DSpace on 2021-06-25T10:56:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-06-05 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Predicted effects of anthropogenic climate change on estuarine and coastal organisms are complex, and early life history stages of calcified ectotherms are amongst the most sensitive groups. Despite the importance of understanding their vulnerability, we lack information on the effects of multiple stressors on the embryonic development of estuarine and burrowing organisms, mainly mangrove-associated species. Here, we determined the combined effects of elevated temperature and decreased pH on the embryonic development of the estuarine fiddler crab Leptuca thayeri. Initially, the microhabitat (burrow) of ovigerous (egg-bearing) females was measured for temperature, pH, and salinity, which provided control values in our laboratory experiment. Embryos at the early stage of development were subjected to cross-factored treatments of predicted temperature and pH and evaluated for development rate, survivorship, and volume until their later embryonic stage. Embryo development was faster at early and later stages of development, and survivorship was lower under elevated temperature. Embryos under reduced pH showed advanced embryonic stages at their late development stage. Higher egg volume was observed in a warmer and acidified environment, and lower volume in warmer and non-acidified conditions, indicating that embryo development is synergistically affected by warming and acidification. More than 70% of embryos developed until late stages under the multiple-stressors treatment, giving insights on the effects of a warm and acidified environment on burrowing estuarine organisms and their early stages of development. Laboratório de Ecologia e Comportamento Animal (LABECOM) - Universidade Estadual Paulista (UNESP) Instituto de Biociências Campus do Litoral Paulista Praça Infante Dom Henrique s/n° Parque Bitaru, PO Box 73601 Programa de Pós-graduação em Ciências Biológicas (Zoologia) - Universidade Estuadual Paulista (UNESP) Instituto de Biociências Campus de Botucatu, Rua Prof. Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior Center for Coastal Research (CCR) Department of Natural Sciences University of Agder (UiA), P.O. Box 422 Norwegian Institute for Water Research (NIVA), Jon Lilletuns vei 3 Laboratório de Ecologia e Comportamento Animal (LABECOM) - Universidade Estadual Paulista (UNESP) Instituto de Biociências Campus do Litoral Paulista Praça Infante Dom Henrique s/n° Parque Bitaru, PO Box 73601 Programa de Pós-graduação em Ciências Biológicas (Zoologia) - Universidade Estuadual Paulista (UNESP) Instituto de Biociências Campus de Botucatu, Rua Prof. Dr. Antônio Celso Wagner Zanin, 250, Distrito de Rubião Junior FAPESP: 92017/00802-0