Tropical wood stores substantial amounts of nutrients, but we have limited understanding why

Tropical wood stores substantial amounts of nutrients, but we have limited understanding why
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热带木材储存了大量的营养物质,但我们对其原因了解有限

DOI:
10.1111/btp.13069
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发表时间:
2022
期刊:
影响因子:
2.1
通讯作者:
Bauters M
Bauters M
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Bauters M

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岩石来源的营养素,如钙(Ca),镁(Mg),磷(P)和钾(K)是必不可少的植物资源,但在高度风化的热带土壤中耗尽,导致生产力或其他生态系统过程的营养限制。尽管如此,大量来自岩石的营养物质存在于木材中,这引发了关于木材营养物质在热带森林生态中所起作用的问题。使用来自热带森林的数据,我们量化了单个树木和生态系统水平的木材营养库存。在生态系统水平上,我们表明热带木材可以储存大量的岩石来源的营养物质。此外,在树的水平上,树种在木质养分浓度方面差异很大。这些观察结果提出了一些重要的问题,如导致这种变化的生物地球化学或生态驱动因素,以及木质组织在营养物质的缓冲和循环中所起的作用。我们为未来的研究提供了一些潜在的解释和方向,以探索热带生物质中这种未被重视但相当大的无机营养素储存。
Rock‐derived nutrients such as calcium (Ca), magnesium (Mg), phosphorus (P), and potassium (K) are essential plant resources, yet depleted in highly weathered tropical soils, leading to nutrient limitation of productivity or other ecosystem processes. Despite this, substantial amounts of rock‐derived nutrients occur within wood, which raises questions about the role that wood nutrients play in the ecology of tropical forests. Using data from forests across the tropics, we quantify wood nutrient stocks at individual tree and ecosystem levels. At the ecosystem level, we show that tropical wood can store substantial amounts of rock‐derived nutrients. Furthermore, on a tree level, tree species vary widely in woody nutrient concentrations. These observations raise important questions as to the biogeochemical or ecological drivers that lead to this variability, as well as the role that woody tissue plays in the buffering and cycling of nutrients. We offer some potential explanations and direction for future research to explore this under‐appreciated but sizable store of inorganic nutrients in tropical biomass.
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