代謝性狀多樣性影響海洋生物地理學
作者:
小柯機器人發布時間:2020/9/18 13:48:39
美國華盛頓大學Curtis Deutsch及其研究組發現代謝性狀多樣性塑造海洋生物地理學。相關論文於2020年9月16日在線發表於國際學術期刊《自然》雜誌。
研究人員評估了物種的地理邊界範圍是否與海洋動物生物多樣性有氧能量獲取的生態生理極限一致。研究人員觀察到新陳代謝速率與氧氣供應效率之間以及這些特性的溫度敏感性之間存在緊密的相關性,這表明海洋動物處於對低氧耐受的強烈選擇之下。由此產生的海洋動物生理耐受性的廣度可預測各種地理生態位-從熱帶到高緯度、從淺水到深水-這比僅基於溫度或氧氣的模型能更好地與物種分布保持一致。
對於所有研究的物種,由於生態活動的旺盛需求,熱和低氧的極限值大大降低,這種特徵在海洋和陸生類群中變化相似。因此,激活溫度依賴性缺氧將各種海洋物種的生物地理環境與整個動物界共享的基本能量需求聯繫在一起。
據悉,氣候和生理學影響生物地理學,但物種範圍的限制很少歸因於物種的數量特徵。
附:英文原文
Title: Metabolic trait diversity shapes marine biogeography
Author: Curtis Deutsch, Justin L. Penn, Brad Seibel
Issue&Volume: 2020-09-16
Abstract: Climate and physiology shape biogeography, yet the range limits of species can rarely be ascribed to the quantitative traits of organisms1,2,3. Here we evaluate whether the geographical range boundaries of species coincide with ecophysiological limits to acquisition of aerobic energy4 for a global cross-section of the biodiversity of marine animals. We observe a tight correlation between the metabolic rate and the efficacy of oxygen supply, and between the temperature sensitivities of these traits, which suggests that marine animals are under strong selection for the tolerance of low O2 (hypoxia)5. The breadth of the resulting physiological tolerances of marine animals predicts a variety of geographical niches—from the tropics to high latitudes and from shallow to deep water—which better align with species distributions than do models based on either temperature or oxygen alone. For all studied species, thermal and hypoxic limits are substantially reduced by the energetic demands of ecological activity, a trait that varies similarly among marine and terrestrial taxa. Active temperature-dependent hypoxia thus links the biogeography of diverse marine species to fundamental energetic requirements that are shared across the animal kingdom.
DOI: 10.1038/s41586-020-2721-y
Source: https://www.nature.com/articles/s41586-020-2721-y