Biodiversity recovery of Neotropical secondary forests
Biodiversity recovery of Neotropical secondary forests
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DOI：
10.1126/sciadv.aau3114
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发表时间：
2019-03-01
期刊：
影响因子：
13.6
通讯作者：
Poorter, Lourens
中科院分区：
文献类型：
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作者：
Rozendaal, Danae M. A.;Bongers, Frans;Poorter, Lourens
古老的热带森林拥有巨大的树种多样性，但正在迅速被清除，而在废弃的农业用地上重新生长的次生林的范围也在增加。我们评估了树种丰富度和组成如何恢复在二次演替过程中的环境条件和人为干扰的梯度在一个前所未有的多站点分析新热带区。次生林物种丰富度恢复快，但物种组成恢复慢。根据稀疏分析，次生林恢复原始林物种丰富度的中位时间为50年（20年后恢复80%）。物种组成的完全恢复需要几个世纪的时间（20年后只有34%的恢复）。因此，在人类改变的热带景观中，采取既维护原始森林又维护物种丰富的次生林的双重战略对于保护生物多样性至关重要。
Old-growth tropical forests harbor an immense diversity of tree species but are rapidly being cleared, while secondary forests that regrow on abandoned agricultural lands increase in extent. We assess how tree species richness and composition recover during secondary succession across gradients in environmental conditions and anthropogenic disturbance in an unprecedented multisite analysis for the Neotropics. Secondary forests recover remarkably fast in species richness but slowly in species composition. Secondary forests take a median time of five decades to recover the species richness of old-growth forest (80% recovery after 20 years) based on rarefaction analysis. Full recovery of species composition takes centuries (only 34% recovery after 20 years). A dual strategy that maintains both old-growth forests and species-rich secondary forests is therefore crucial for biodiversity conservation in human-modified tropical landscapes.