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[交流] Climate change and the cost-of-living squeeze in desert lizards

Climate change and the cost-of-living squeeze in desert lizards

气候变化和沙漠蜥蜴的生存压力

▲ 作者:KRISTOFFER H. WILD, RAYMOND B. HUEY, ERIC R. PIANKA, SUSANA CLUSELLA-TRULLAS, ANTHONY L. GILBERT, DONALD B. MILES, AND MICHAEL R. KEARNEY

▲链接:

https://www.science.org/doi/10.1126/science.adq4372

▲摘要:

气候变暖可能导致变温动物的生活成本“挤压”,因为它增加了能量消耗,同时减少了觅食收益。研究者使用生物物理模型对非洲和澳大利亚沙漠中的10种生态多样性蜥蜴进行了验证,发现历史上的变暖(1950—2020年)在非洲比在澳大利亚更强烈,转化为对非洲昼夜活动物种的能量挤压。

虽然没有观察到对澳大利亚昼夜活动物种的净影响,但研究发现,变暖对夜间活动物种产生了能量“缓解”。未来变暖对非洲的影响将比澳大利亚更严重,需要增加食物摄取率(白天活动的物种每小时增加10%)。因此,气候变暖对沙漠蜥蜴能量收支的影响将是特定物种的,但可能是可预测的。

▲ Abstract:

Climate warming can induce a cost-of-living “squeeze” in ectotherms by increasing energetic expenditures while reducing foraging gains. We used biophysical models (validated by 2685 field observations) to test this hypothesis for 10 ecologically diverse lizards in African and Australian deserts. Historical warming (1950–2020) has been more intense in Africa than in Australia, translating to an energetic squeeze for African diurnal species. Although no net impact on Australian diurnal species was observed, warming generated an energetic “relief” (by increasing foraging time) for nocturnal species. Future warming impacts will be more severe in Africa than in Australia, requiring increased rates of food intake (+10% per hour active for diurnal species). The effects of climate warming on desert lizard energy budgets will thus be species-specific but potentially predictable.
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