Divergent Responses of Soil Fungi Functional Groups to Short-term Warming
Divergent Responses of Soil Fungi Functional Groups to Short-term Warming
复制标题
土壤真菌功能群对短期变暖的不同反应
DOI：
10.1007/s00248-014-0385-6
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发表时间：
2014-11-01
影响因子：
3.6
通讯作者：
Chu, Haiyan
中科院分区：
文献类型：
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作者：
Xiong, Jinbo;Peng, Fei;Chu, Haiyan
土壤真菌在土壤地球化学过程中起着重要的生态作用，特别是在木质素的分解过程中起着主导作用。然而，人们对不同真菌群体对细菌对气候变暖的反应知之甚少。在这项研究中，使用条形码焦磷酸测序，我们表明，短期（15个月）的高寒草甸的野外暴露于变暖（升高1和2摄氏度）没有显着改变青藏高原的整体土壤真菌群落结构和α多样性，但平均β多样性显着下降，以应对变暖。土壤呼吸速率在生长季受到刺激，且与土壤温度呈极显著（P < 0.001）相关。特别是，气候变暖引发了优势子囊菌门和稀有类群（相对丰度<0.1%）群落结构的急剧变化。此外，丰富的特定的担子菌附属成员显着增加，而子囊菌门显示了一系列的变暖的反应。总的来说，我们得出结论，真菌群落是耐短期变暖，虽然在某些物种和稀有类群的变化。这份报告表明，在一个相对较小的子集的土壤真菌群落的变化足以产生实质性的功能变化，如CO2排放率。
Soil fungi fill pivotal ecological roles in biogeochemical processes, particularly dominating decomposition of lignin. Little is known, however, about the responses of different fungal groups to climate warming with respect to bacteria. In this study, using barcode pyrosequencing, we showed that short-term (15 months) of field exposure of an alpine meadow to warming (elevated 1 and 2 A degrees C) did not markedly alter the overall soil fungal community structures and alpha-diversity on Tibetan Plateau, but the average beta-diversity dramatically decreased in response to warming. However, soil respiration rates were stimulated in the growing season, which significantly (P < 0.001) correlated with soil temperature. Particularly, warming triggered dramatic shifts in the community structure of dominate Ascomycota and rare taxa (relative abundance < 0.1 %). In addition, the abundances of specific Basidiomycota-affiliated members significantly increased, while Ascomycota showed a range of responses to warming. Collectively, we conclude that the fungal communities are resistant to short-term warming, though variations are observed in certain species and rare taxa. This report indicates that changes in a relatively small subset of the soil fungal community are sufficient to produce substantial changes in function, such as CO2 efflux rates.