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yexuqing木蟲之王 (文學(xué)泰斗)
太陽(yáng)系系主任
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[交流]
Climate change and the cost-of-living squeeze in desert lizards
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Climate change and the cost-of-living squeeze in desert lizards 氣候變化和沙漠蜥蜴的生存壓力 ▲ 作者:KRISTOFFER H. WILD, RAYMOND B. HUEY, ERIC R. PIANKA, SUSANA CLUSELLA-TRULLAS, ANTHONY L. GILBERT, DONALD B. MILES, AND MICHAEL R. KEARNEY ▲鏈接: https://www.science.org/doi/10.1126/science.adq4372 ▲摘要: 氣候變暖可能導(dǎo)致變溫動(dòng)物的生活成本“擠壓”,因?yàn)樗黾恿四芰肯,同時(shí)減少了覓食收益。研究者使用生物物理模型對(duì)非洲和澳大利亞沙漠中的10種生態(tài)多樣性蜥蜴進(jìn)行了驗(yàn)證,發(fā)現(xiàn)歷史上的變暖(1950—2020年)在非洲比在澳大利亞更強(qiáng)烈,轉(zhuǎn)化為對(duì)非洲晝夜活動(dòng)物種的能量擠壓。 雖然沒有觀察到對(duì)澳大利亞晝夜活動(dòng)物種的凈影響,但研究發(fā)現(xiàn),變暖對(duì)夜間活動(dòng)物種產(chǎn)生了能量“緩解”。未來變暖對(duì)非洲的影響將比澳大利亞更嚴(yán)重,需要增加食物攝取率(白天活動(dòng)的物種每小時(shí)增加10%)。因此,氣候變暖對(duì)沙漠蜥蜴能量收支的影響將是特定物種的,但可能是可預(yù)測(cè)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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