Influence of Post‐Clearing Treatment on the Recovery of Herbaceous Plant Communities in Amazonian Secondary Forests
Influence of Post‐Clearing Treatment on the Recovery of Herbaceous Plant Communities in Amazonian Secondary Forests
复制标题
砍伐后处理对亚马逊次生林草本植物群落恢复的影响
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
W. Mantovani
中科院分区：
文献类型：
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作者：
M. Ribeiro;E. Bruna;W. Mantovani
次生林在世界各地的热带景观中越来越普遍，了解它们的更新对于设计有效的恢复战略是必要的。以往的研究表明，次生林中的木本植物群落可以根据该地区过去人类活动的性质而遵循不同的演替路径，但对不同土地利用历史的次生林中草本植物物种多样性的格局知之甚少。我们比较了亚马逊中部两种次生林中草本植物群落的多样性和丰度--那些在砍伐和焚烧树木创造的牧场上再生的次生林，以及那些只砍伐树木的次生林。我们还测试了次生林中的植物密度和物种丰富度是否与接近原始林有关。与原始林地相比，在非火烧生境上更新的森林的草本植物密度和物种丰富度都低于在火烧生境上更新的林。但火烧林的物种组成和丰度与原始林较为接近，而火烧林有几种次生林特有种。无论是火烧林还是火烧林，距林缘的距离与草本植物密度和物种丰富度均不相关。总体而言，我们的结果表明，热带次生林中草本植物物种的自然更新取决于一个地点的后砍伐处理。我们建议在制定和实施恢复战略之前评估遗址的土地历史，因为这将影响覆盖恢复工作的生物模板。
Secondary forests are an increasingly common feature in tropical landscapes worldwide and understanding their regeneration is necessary to design effective restoration strategies. It has previously been shown that the woody species community in secondary forests can follow different successional pathways according to the nature of past human activities in the area, yet little is known about patterns of herbaceous species diversity in secondary forests with different histories of land use. We compared the diversity and abundance of herbaceous plant communities in two types of Central Amazonian secondary forests—those regenerating on pastures created by felling and burning trees and those where trees were felled only. We also tested if plant density and species richness in secondary forests are related to proximity to primary forest. In comparison with primary forest sites, forests regenerating on non‐burned habitats had lower herbaceous plant density and species richness than those on burned ones. However, species composition and abundance in non‐burned stands were more similar to those of primary forest, whereas several secondary forest specialist species were found in burned stands. In both non‐burned and burned forests, distance from the forest edge was not related to herbaceous density and species richness. Overall, our results suggest that the natural regeneration of herbaceous species in secondary tropical forests is dependent on a site's post‐clearing treatment. We recommend evaluating the land history of a site prior to developing and implementing a restoration strategy, as this will influence the biological template on which restoration efforts are overlaid.