Elevated temperatures interact with habitat quality to undermine survival of ectotherms in climatic refugia

摘要: Aim Large-scale effects of climatic fluctuations can be masked by local microclimatic variability, allowing species to retain fragments their original ranges. However, downscaling predicted ecological climate change scales and individual comprises a key knowledge gap. As temperature modifies both abiotic biotic processes, the fate refugial populations may depend on interactions with susceptibility organisms other factors, rather than impact alone. To explore this, we examined whether regulates sensitivity hypoxia an aquatic glacial relict, Mysis salemaai, opossum shrimp. Location Loughs Oughter, Allen Derg (field surveys) Dublin (laboratory experiments), Ireland. Methods We used laboratory experiments determine thermal M. salemaai quantify effect survival regulation aerobic metabolism in progressive hypoxia. The resulting oxygen thresholds were then validated field. Results Survival reduced conditions was significantly lower at higher temperatures, even though tested range did not cause mortality its own. Results respiration assays suggest that this consequence impaired capacity elevated temperatures for regulating uptake hypoxic conditions. Main conclusions Our findings demonstrate biological warming more strongly factors Understanding species-specific responses such is essential predict future distribution patterns, mitigate threats prioritize conservation measures aimed preserving global biodiversity.