Warming overcomes dispersal-limitation to promote non-native expansion in Lake Baikal
Warming overcomes dispersal-limitation to promote non-native expansion in Lake Baikal
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DOI：
10.1016/j.jglr.2022.07.006
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发表时间：
2022-09-17
影响因子：
2.2
通讯作者：
Post，David M.
中科院分区：
文献类型：
--
作者：
Bowman Jr，Larry L.;Wieczynski，Daniel J.;Post，David M.
非本地物种和气候变化对全球生物多样性构成严重威胁。然而，气候，扩散和竞争的作用是很难解开异质景观。我们结合联合收割机的经验数据和理论来研究这些力量如何影响贝加尔湖的非本地物种的传播。我们分析了潜在的forDaphnia longispinato建立在贝加尔湖，潜在的威胁地方性，嗜冷桡足Epischurella baikalensis。我们收集了现场样本，以建立当前的社区组成，并将其与流速，现今温度和温度预测的模型预测进行比较。我们的数据和模型一致认为，扩张目前受到扩散的限制。然而，预计温度的上升逆转了这种影响，使长刺杜父鱼能够在贝加尔湖的主要盆地建立。气候变化和扩散之间的相互作用产生了强烈的负面影响，超过了它们各自的影响。气候、扩散和竞争对扩张有着复杂的、相互作用的影响，对全球生物多样性有着重要的影响。
Non-native species and climate change pose serious threats to global biodiversity. However, the roles of climate, dispersal, and competition are difficult to disentangle in heterogeneous landscapes. We combine empirical data and theory to examine how these forces influence the spread of non-native species in Lake Baikal. We analyze the potential forDaphnia longispinato establish in Lake Baikal, potentially threatening an endemic, cryophillic copepodEpischurella baikalensis. We collected field samples to establish current community composition and compared them to model predictions informed by flow rates, present-day temperatures, and temperature projections. Our data and model agree that expansion is currently limited by dispersal. However, projected increases in temperature reverse this effect, allowingD.longispinato establish in Lake Baikal’s main basin. A strong negative impact emerges from the interaction between climate change and dispersal, outweighing their independent effects. Climate, dispersal, and competition have complex, interactive effects on expansion with important implications for global biodiversity.