Niche modelling predicts that soil fungi occupy a precarious climate in boreal forests
Niche modelling predicts that soil fungi occupy a precarious climate in boreal forests
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生态位模型预测土壤真菌在北方森林中占据不稳定的气候
DOI：
10.1111/geb.13684
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发表时间：
2023
影响因子：
6.4
通讯作者：
Zhu, Kai
中科院分区：
文献类型：
--
作者：
Qin, Clara;Pellitier, Peter T.;Van Nuland, Michael E.;Peay, Kabir G.;Zhu, Kai
关于真菌生态位如何在环境超空间中分布的信息有限，阻碍了预测土壤真菌群落对气候变化的反应。我们通过对数千种真菌物种的生态位进行建模来预测北美土壤真菌组合组成的气候敏感性。地点美国和加拿大的一百一十三个地点，涵盖除热带雨林之外的所有生物群落。研究真菌的主要分类单元。时间段2011-2018。方法我们将来自北美两个大陆规模采样网络的内部转录间隔区（ITS）序列结合起来，并将它们聚类成可操作的分类单元(OTU) 相似度为 97%。使用气候和土壤数据，我们根据逻辑岭回归对至少 10 个地点中存在的所有 OTU 进行生态位模型 (ENM) 拟合 (n= 8597)。为了描述土壤真菌组合在气候梯度上的组成更替，我们引入了一种新的基于生态位的气候敏感性指标，即索伦森气候敏感性指数。最后，我们绘制了整个北美地区的气候敏感性地图。结果ENM 的平均样本外预测准确度为 73.8%，其中温度变量是真菌分布的有力预测因子。土壤真菌气候生态位在环境空间中聚集在一起，这表明了共同的生理极限，并预测了气候变化引起的成分突然变化。北美气候下的土壤真菌更容易受到寒冷和干燥条件的限制，而不是受到温暖和潮湿条件的限制，外生菌根真菌通常比腐生真菌能耐受更低的温度。索伦森气候敏感性在整个环境空间中表现出多模态分布，其中与北方森林相对应的气候达到峰值。主要结论对于北美土壤真菌组合的组成而言，北方森林占据了一个特别不稳定的环境空间区域，因为即使是小程度的变暖也可能引发主要以适应温暖的物种涌入为特征的大的组成变化。
AimEfforts to predict the responses of soil fungal communities to climate change are hindered by limited information on how fungal niches are distributed across environmental hyperspace. We predict the climate sensitivity of North American soil fungal assemblage composition by modelling the ecological niches of several thousand fungal species.LocationOne hundred and thirteen sites in the United States and Canada spanning all biomes except tropical rain forest.Major Taxa StudiedFungi.Time Period2011–2018.MethodsWe combine internal transcribed spacer (ITS) sequences from two continental‐scale sampling networks in North America and cluster them into operational taxonomic units (OTUs) at 97% similarity. Using climate and soil data, we fit ecological niche models (ENMs) based on logistic ridge regression for all OTUs present in at least 10 sites (n= 8597). To describe the compositional turnover of soil fungal assemblages over climatic gradients, we introduce a novel niche‐based metric of climate sensitivity, the Sørensen climate sensitivity index. Finally, we map climate sensitivity across North America.ResultsENMs have a mean out‐of‐sample predictive accuracy of 73.8%, with temperature variables being strong predictors of fungal distributions. Soil fungal climate niches clump together across environmental space, which suggests common physiological limits and predicts abrupt changes in composition with respect to changes in climate. Soil fungi in North American climates are more likely to be limited by cold and dry conditions than by warm and wet conditions, and ectomycorrhizal fungi generally tolerate colder temperatures than saprotrophic fungi. Sørensen climate sensitivity exhibits a multimodal distribution across environmental space, with a peak in climates corresponding to boreal forests.Main ConclusionsThe boreal forest occupies an especially precarious region of environmental space for the composition of soil fungal assemblages in North America, as even small degrees of warming could trigger large compositional changes characterized mainly by an influx of warm‐adapted species.
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影响因子：
2.7
作者：
Querejeta, JI;Egerton-Warburton, LM;Allen, MF
通讯作者：
Allen, MF
DOI：
10.1002/joc.5086
发表时间：
2017-10-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Fick, Stephen E.;Hijmans, Robert J.
通讯作者：
Hijmans, Robert J.
群落生态学家可以从物种分布模型中学到什么？
影响因子：
2.7
作者：
S. J. Murphy;Adam B. Smith
通讯作者：
Adam B. Smith
影响因子：
30.7
作者：
Delgado-Baquerizo, Manuel;Guerra, Carlos A.;Maestre, Fernando T.
通讯作者：
Maestre, Fernando T.
影响因子：
2.9
作者：
Pauvert, Charlie;Buee, Marc;Vacher, Corinne
通讯作者：
Vacher, Corinne