科學家預測溫度對果蠅種群死亡率的影響
作者:
小柯機器人發布時間:2020/9/4 20:05:35
智利天主教大學生物科學學院Enrico L. Rezende組在研究中取得進展。他們的最新研究揭示了預測溫度對自然界果蠅種群死亡率的影響和選擇。相關論文於2020年9月4日發表於《科學》。
他們根據耐熱實驗室的測量結果,使用動態模型預測了可變溫度下的死亡率。在不同的變暖條件下,11種果蠅的理論致死溫度與經驗結果幾乎沒有區別。對於野生果蠅而言,根據環境溫度記錄預測的每日死亡率,將在數周或數月內累積,這與自然界中觀察到的季節性波動和種群減少相一致。
他們的模型量化了自然界中由溫度引起的死亡率,這對於研究全球變暖對自然種群的影響至關重要,分析表明,臨界溫度不能可靠地預測死亡率。
據悉,在不久的將來,平均溫度和極端溫度將上升,但是這種變化將如何影響自然種群的死亡率仍不清楚。
附:英文原文
Title: Predicting temperature mortality and selection in natural Drosophila populations
Author: Enrico L. Rezende, Francisco Bozinovic, András Szilágyi, Mauro Santos
Issue&Volume: 2020/09/04
Abstract: Average and extreme temperatures will increase in the near future, but how such shifts will affect mortality in natural populations is still unclear. We used a dynamic model to predict mortality under variable temperatures on the basis of heat tolerance laboratory measurements. Theoretical lethal temperatures for 11 Drosophila species under different warming conditions were virtually indistinguishable from empirical results. For Drosophila in the field, daily mortality predicted from ambient temperature records accumulate over weeks or months, consistent with observed seasonal fluctuations and population collapse in nature. Our model quantifies temperature-induced mortality in nature, which is crucial to study the effects of global warming on natural populations, and analyses highlight that critical temperatures are unreliable predictors of mortality.
DOI: 10.1126/science.aba9287
Source: https://science.sciencemag.org/content/369/6508/1242
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037