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Responses of AM fungal abundance to the drivers of global climate change: A meta-analysis
Science of the Total Environment ( IF 8.2 ) Pub Date : 2021-09-16 , DOI: 10.1016/j.scitotenv.2021.150362
Han Hu 1 , Liyuan He 2 , Huanfei Ma 1 , Jieying Wang 1 , Yi Li 1 , Jun Wang 3 , Yaoxin Guo 4 , Chengjie Ren 5 , Hongying Bai 1 , Fazhu Zhao 1
Affiliation  

Arbuscular mycorrhizal fungi (AMF), playing critical roles in carbon cycling, are vulnerable to climate change. However, the responses of AM fungal abundance to climate change are unclear. A global-scale meta-analysis was conducted to investigate the response patterns of AM fungal abundance to warming, elevated CO2 concentration (eCO2), and N addition. Both warming and eCO2 significantly stimulated AM fungal abundance by 18.6% (95%CI: 5.9%–32.8%) and 21.4% (15.1%–28.1%) on a global scale, respectively. However, the response ratios (RR) of AM fungal abundance decreased with the degree of warming while increased with the degree of eCO2. Furthermore, in warming experiments, as long as the warming exceeded 4 °C, its effects on AM fungal abundance changed from positive to negative regardless of the experimental durations, methods, periods, and ecosystem types. The effects of N addition on AM fungal abundance are −5.4% (−10.6%–0.2%), and related to the nitrogen fertilizer input rate and ecosystem type. The RR of AM fungal abundance is negative in grasslands and farmlands when the degree of N addition exceeds 33.85 and 67.64 kg N ha−1 yr−1, respectively; however, N addition decreases AM fungal abundance in forests only when the degree of N addition exceeds 871.31 kg N ha−1 yr−1. The above results provide an insight into predicting ecological functions of AM fungal abundance under global changes.



中文翻译:

AM 真菌丰度对全球气候变化驱动因素的响应:荟萃分析

丛枝菌根真菌 (AMF) 在碳循环中发挥关键作用,容易受到气候变化的影响。然而,AM 真菌丰度对气候变化的响应尚不清楚。进行了全球范围的荟萃分析,以研究 AM 真菌丰度对变暖、CO 2浓度 (eCO 2 )升高和 N 添加的响应模式。在全球范围内,变暖和 eCO 2 均显着刺激 AM 真菌丰度分别增加了 18.6%(95%CI:5.9%–32.8%)和 21.4%(15.1%–28.1%)。然而,AM真菌丰度的响应比(RR)随着变暖程度的增加而降低,而随着eCO 2程度的增加而增加. 此外,在增温实验中,只要升温超过 4 °C,无论实验持续时间、方法、时期和生态系统类型如何,其对 AM 真菌丰度的影响都会从正面变为负面。N添加对AM真菌丰度的影响为-5.4%(-10.6%–0.2%),并与氮肥输入率和生态系统类型有关。当N添加程度分别超过33.85和67.64 kg N ha -1  yr -1 时,AM真菌丰度的RR在草地和农田中为负值;然而,只有当 N 添加程度超过 871.31 kg N ha -1  yr -1时,N 添加才会降低森林中 AM 真菌的丰度. 上述结果为预测全球变化下 AM 真菌丰度的生态功能提供了见解。

更新日期:2021-09-16
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