Paleorecords reveal the increased temporal instability of species diversity under biodiversity loss
Paleorecords reveal the increased temporal instability of species diversity under biodiversity loss
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古记录揭示了生物多样性丧失下物种多样性的时间不稳定性增加
DOI：
10.1016/j.quascirev.2021.107147
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发表时间：
2021-08-19
影响因子：
4
通讯作者：
Stenseth, Nils Chr
中科院分区：
文献类型：
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作者：
Dong, Yajie;Wu, Naiqin;Stenseth, Nils Chr
持续的气候变化威胁着生物多样性，并直接影响动植物群落的稳定。然而，由于缺乏长期数据，生物群落的物种多样性如何响应自然气候变暖，以及生物多样性在气候变暖面前的时间稳定性是否随不同群落的环境梯度而变化，目前尚不清楚。我们提出了三个高分辨率的陆生软体动物化石记录，可追溯到25 kyr沿着气候和植被梯度从东南到西北横跨中国黄土高原。记录表明，冰消期变暖增加了软体动物多样性的物种贫乏草原社区的30%，但在高多样性的森林草原社区，影响较小，多样性的动态稳定性，甚至保持。高多样性群落通过以喜温、喜湿类群取代耐寒类群来调整其组成，组成周转率达到60%左右。物种贫乏的社区的软体动物多样性被证明是更敏感的末次冰消期变暖，并与东亚夏季风的加强比不同的社区。从长远来看，面对气候扰动，物种贫乏社区生物多样性的时间不稳定性和敏感性增加，凸显了未来人为生物多样性丧失导致土壤群落崩溃的潜在风险。(C)2021爱思唯尔有限公司保留所有权利。
Ongoing climate change threatens biodiversity and directly affects the stability of plant-animal communities. However, it is unclear how the species diversity of biological communities responds to natural climate warming, and whether the temporal stability of biodiversity in the face of climate warming varies with environmental gradients in different communities due to the lack of long-term data. We present three high-resolution records of terrestrial mollusk fossils dating back 25 kyr along a climatic and vegetation gradient from southeast to northwest across the Chinese Loess Plateau. The records show that deglacial warming increased the mollusk diversity by similar to 30% in species-poor steppe communities; however, in high-diversity forest-steppe communities, the effect was less, and diversity's dynamic stability was even maintained. The high-diversity communities adjusted their composition by substituting thermo-humidiphilous taxa for cold-tolerant taxa, with the compositional turnover reaching similar to 60%. The mollusk diversity of species-poor communities is shown to be more sensitive to the last deglacial warming and associated with the strengthening of the East Asian Summer monsoon than that of diverse communities. The increased temporal instability and sensitivity of biodiversity in species-poor communities in the face of climate disturbances, from a long-term perspective, highlights the potential risk of collapse of soil communities under future anthropogenic biodiversity loss. (C) 2021 Elsevier Ltd. All rights reserved.