Secondary forests as biodiversity repositories in human-modified landscapes: insights from the Neotropics

M. Tabarelli, Bráulio A. Santos, V. Arroyo‐Rodríguez, Felipe Pimentel Lopes De Melo
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引用次数: 5

Abstract

In this essay we examine some of the processes affecting the composition and structure of tree species assemblages and, consequently, what we can expect from secondary-forest stands as an element of human-modified landscapes and as an opportunity for biodiversity persistence in this ecological context. Based on the available information, it is reasonable to predict that in some landscapes or biotas: (1) small forest remnants degenerate and support plant assemblages with attributes similar to those observed in early and intermediate-aged regenerating stands, while secondary-forest stands move from initial to more advanced successional stages; (2) collectively, remnant/stand attributes and landscape integrity define the pace through which degeneration proceeds, but also the potential for regeneration; (3) at the landscape spatial scale, remnants and stands tend to converge in terms of structure, but also in terms of taxonomic and functional composition. In other words, remnants degenerate and secondary-forest stands regenerate toward a sort of ‘climax community’, which is conditioned by the physical and biological integrity of both patch and landscape. Considering secondary forests in the conceptual, ecological and spatial framework of human-modified landscapes may help us to understand and maximize the conservation services provided by this habitat as it proliferates through human-modified landscapes.
人类改造景观中作为生物多样性储存库的次生林:来自新热带的见解
在这篇文章中,我们研究了一些影响树种组合组成和结构的过程,因此,我们可以期望从次生林林分作为人类改造景观的一个元素,并在这种生态背景下作为生物多样性持久性的机会。根据现有信息,可以合理地预测,在一些景观或生物区系中:(1)小森林残余物退化并支持与早期和中期再生林相似的属性的植物组合,而次生林则从初始演替阶段向更高级的演替阶段过渡;(2)总体而言,遗迹/林分属性和景观完整性决定了退化的速度,也决定了再生的潜力;(3)在景观空间尺度上,残余物和林分不仅在结构上趋于收敛,而且在分类和功能组成上也趋于收敛。换句话说,残余物退化和次生林林分向一种“顶极群落”再生,这是由斑块和景观的物理和生物完整性所决定的。在人类改造景观的概念、生态和空间框架中考虑次生林,可以帮助我们理解并最大限度地发挥这种栖息地在人类改造景观中增殖所提供的保护服务。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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33
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45 weeks
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