Dominant community mycorrhizal types influence local spatial structure between adult and juvenile temperate forest tree communities
Dominant community mycorrhizal types influence local spatial structure between adult and juvenile temperate forest tree communities
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DOI：
10.1111/1365-2435.13674
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发表时间：
2020-09-26
影响因子：
5.2
通讯作者：
Blackwood, Christopher B.
中科院分区：
文献类型：
--
作者：
Eagar, Andrew C.;Cosgrove, Colleen R.;Blackwood, Christopher B.
植物-土壤反馈（PSF）是已知的影响植物群落组成，最近的工作表明，这些影响可能是由相关的菌根协会和系统发育关系的性状。然而，有一个关键的需要，以测试这些特性在预测PSF结果在自然植物群落的有用性。要测试的证据，菌根和系统发育控制PSF在物种和社区水平，我们研究了成年和幼年树木之间的空间关系，干映射硬木林地块使用点模式分析和线性混合效应模型。我们发现，空间格局的成年和少年树木，以及整体成年树招聘，显着影响我们的森林群落的优势菌根类型，但不受成年和少年树木之间的系统发育关系。此外，个别物种所经历的PSF依赖于周围社区的菌根优势。丛枝菌根树占主导地位的社区的空间格局反映了成年和幼年树木（暗示负PSF）之间的过度分散，而外生菌根树占主导地位的社区反映集群（暗示正PSF）。我们的研究结果表明，PSFs是由优势树木的菌根协会驱动的，优势社区成员性状对土壤微生物和土壤地球化学的影响“溢出”到社区中不太丰富的个人。我们的研究支持使用整个社区，菌根为基础的框架研究PSF在植物群落中存在多种菌根类型。在本文的支持信息中可以找到一个免费的简明语言摘要。
Plant-soil feedback (PSF) is known to influence plant community composition, and recent work suggests that these effects may be regulated by traits related to mycorrhizal associations and phylogenetic relationships. However, there is a critical need to test the usefulness of these traits in predicting PSF outcomes in natural plant communities. To test for evidence of mycorrhizal and phylogenetic controls over PSF at both the species and community level, we examined the spatial relationship between adult and juvenile trees in stem-mapped hardwood forest plots using point pattern analyses and linear mixed-effect models. We found that spatial patterns of adult and juvenile trees, as well as overall adult tree recruitment, were significantly affected by the dominant mycorrhizal type of our forested communities, but were not influenced by the phylogenetic relationship between adult and juvenile trees. Additionally, PSF experienced by individual species was dependent on the mycorrhizal dominance of the surrounding community. Spatial patterns in communities dominated by arbuscular mycorrhizal trees reflected overdispersion between adult and juvenile trees (suggestive of negative PSF), while communities dominated by ectomycorrhizal trees reflected clustering (suggestive of positive PSF). Our findings indicate that PSFs are driven by the mycorrhizal associations of dominant trees, with effects of dominant community member traits on soil microorganisms and biogeochemistry 'spilling over' onto less abundant individuals in the community. Our research supports the use of whole-community, mycorrhizal-based frameworks for studying PSF in plant communities where multiple mycorrhizal types are present. A freePlain Language Summarycan be found within the Supporting Information of this article.