Shift in fungal communities and associated enzyme activities along an age gradient of managed Pinus sylvestris stands
Shift in fungal communities and associated enzyme activities along an age gradient of managed Pinus sylvestris stands
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DOI：
10.1038/ismej.2016.184
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发表时间：
2017-04-01
期刊：
影响因子：
11
通讯作者：
Lindahl, Bjorn D.
中科院分区：
文献类型：
--
作者：
Kyaschenko, Julia;Clemmensen, Karina E.;Lindahl, Bjorn D.
林业在树龄结构、土壤性质和植被组成方面重塑了生态系统。这些变化可能与微生物群落组成的变化并行，并可能对生态系统功能产生反馈。在这里，我们评估了真菌群落在一个时间序列的管理松sylvestris林分，并研究了分类组成和细胞外酶活性之间的相关性。毫不奇怪，采伐对外生菌根真菌的丰度和多样性有负面影响。相反，滥伐有利于腐坏真菌的增殖，这些真菌与参与纤维素分解的酶有关。在林分发育过程中，重建的外生菌根真菌群落组成由幼龄林分中athelaceae的优势向高龄林分中Cortinarius和Russula的优势转变。后期演替外生菌根类群与参与从有机质中调动养分的酶相关，表明养分限制加剧。我们的研究结果表明，维持外生菌根真菌群落的功能多样性可能通过保持共生驱动的有机养分池循环的能力来维持长期的森林生产。
Forestry reshapes ecosystems with respect to tree age structure, soil properties and vegetation composition. These changes are likely to be paralleled by shifts in microbial community composition with potential feedbacks on ecosystem functioning. Here, we assessed fungal communities across a chronosequence of managed Pinus sylvestris stands and investigated correlations between taxonomic composition and extracellular enzyme activities. Not surprisingly, clear-cutting had a negative effect on ectomycorrhizal fungal abundance and diversity. In contrast, clear-cutting favoured proliferation of saprotrophic fungi correlated with enzymes involved in holocellulose decomposition. During stand development, the re-establishing ectomycorrhizal fungal community shifted in composition from dominance by Atheliaceae in younger stands to Cortinarius and Russula species in older stands. Late successional ectomycorrhizal taxa correlated with enzymes involved in mobilisation of nutrients from organic matter, indicating intensified nutrient limitation. Our results suggest that maintenance of functional diversity in the ectomycorrhizal fungal community may sustain long-term forest production by retaining a capacity for symbiosis-driven recycling of organic nutrient pools.