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Global thermal tolerance of freshwater invertebrates and fish

Bayat, H. S.; He, F.; Madariaga, G. M.; Escobar-Sierra, C.; Prati, S.; Jupke, J. F.; Peters, K.; Chen, X.; Spaak, J. W.; Manfrin, A.; Juvigny-Khenafou, N. P. D.; Schäfer, R. B.

2024-07-11 ecology
10.1101/2024.07.08.602306 bioRxiv
Show abstract

Scientists have investigated the thermal tolerance of organisms for centuries, yet the field has not lost relevance as the environmental threats of thermal pollution and global change sharpen the need to understand the thermal vulnerability of organisms in landscapes increasingly subjected to multiple stressors. Freshwater fish and especially invertebrates are greatly underrepresented in recent large-scale compilations of thermal tolerance, despite the importance of freshwater habitats as a crucial resource and biodiversity havens. This inspired us to create a thermal tolerance database for these organisms that includes literature from 1900 until the present day sourced from five languages to counteract geographic bias, and 395 thermal tolerance tests conducted with additional stressors present. The database contains over 5000 records for over 800 species, including 452 invertebrates, providing a valuable resource to test hypotheses on thermal risks to freshwater organisms in present and future environments, and how these might change in multiple stressor scenarios.

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