Legume abundance along successional and rainfall gradients in Neotropical forests
Legume abundance along successional and rainfall gradients in Neotropical forests
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DOI：
10.1038/s41559-018-0559-6
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发表时间：
2018-07-01
影响因子：
16.8
通讯作者：
Powers, Jennifer S.
中科院分区：
文献类型：
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作者：
Gei, Maga;Rozendaal, Danae M. A.;Powers, Jennifer S.
再生热带森林的养分需求部分由固氮豆科植物满足，但我们对这些物种丰富度的了解偏向于潮湿的热带地区。在这里，我们通过综合 42 个新热带森林时间序列网络的森林清查图，展示了豆科植物的丰度如何受到干扰恢复和大规模降雨梯度的影响。在天然林再生的前三十年中，干燥的豆科植物断面积是潮湿的次生林的两倍。豆科植物在最近受到干扰、水资源有限的森林中取得的巨大生态成功可能与它们的小叶尺寸减小和固定 N-2 的能力有关，这两者共同增强了豆科植物的耐旱性和水分利用效率。地球系统模型应纳入豆科植物优势的大规模演替和气候模式，以更准确地估计热带森林自然固氮的最大潜力。
The nutrient demands of regrowing tropical forests are partly satisfied by nitrogen-fixing legume trees, but our understanding of the abundance of those species is biased towards wet tropical regions. Here we show how the abundance of Leguminosae is affected by both recovery from disturbance and large-scale rainfall gradients through a synthesis of forest inventory plots from a network of 42 Neotropical forest chronosequences. During the first three decades of natural forest regeneration, legume basal area is twice as high in dry compared with wet secondary forests. The tremendous ecological success of legumes in recently disturbed, water-limited forests is likely to be related to both their reduced leaflet size and ability to fix N-2, which together enhance legume drought tolerance and water-use efficiency. Earth system models should incorporate these large-scale successional and climatic patterns of legume dominance to provide more accurate estimates of the maximum potential for natural nitrogen fixation across tropical forests.