The nutrient content of terrestrial plant leaves has recently been affected by phylogeny and environment. Zhang Shibao and Cao Kunfang of the Xishuangbanna Tropical Botanical Garden Research Group of the Chinese Academy of Sciences and other researchers in the top journal of biogeography Global Ecology and Biogeography The above article discusses how phylogeny and environment affect the leaf nutrient content of terrestrial plants. This is the second paper published by the research group in this journal.
The functions and biogeochemical cycles of terrestrial ecosystems are closely related to leaf element content, so it is important to understand the biological and ecological factors that affect leaf element content for simulating ecosystem productivity, nutrient flow, and their response to global changes. The author collected 10 leaf element contents and environmental factors of 702 terrestrial plants in China, used Partial Mantel test to exclude variable autocorrelation factors to analyze partial correlation coefficients of environmental factors on leaf element contents, and used phylogenetic comparison methods to exclude The impact of phylogenetic analysis on the correlation between leaf element content and environmental factors. It was found that phylogeny explained 40.2-43.9% of the S and SiO2 element content in leaves. On the contrary, latitude can explain 19.5-52.1% of the variation in leaf N, P, K, Fe, Al, Mn, Na, and Ca content, and its impact is greater than phylogeny. At the family level, leaf N, P, Al, Fe, and Na content is related to annual rainfall, while N, P, and Fe content is related to average annual temperature. Principal component analysis shows that the elements (N, P, K, S, Fe) related to plant protein synthesis and photosynthesis all fall on the first axis of the main component, which is closely related to latitude, annual rainfall and average annual temperature. Therefore, in the context of global change, changes in temperature and rainfall will directly change the spatial pattern of leaf elements in vegetation, as well as changes in nutrient cycles and functions of ecosystems.
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