Long-term change in the tree community of a tropical forest remnant surrounded by human-modified landscapes

IF 1 4区 生物学 Q3 PLANT SCIENCES
Érica Rievrs Borges, Monize Altomare, Marcela Venelli Pyles, Marcelo Leandro Bueno, Rubens Manoel dos Santos, Marco Aurélio Leite Fontes, Ary Teixeira de Oliveira-Filho
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引用次数: 0

Abstract

Previous studies have demonstrated that the tree community of small and isolated forest fragments show persisting structural and functional attributes characteristic of early-successional systems. Yet, the impacts of forest small size and isolation on several tree community attributes have not been comprehensively quantified in long-term studies. Here we analysed permanent plots over 17 years to investigate the recovery of community attributes in a small tropical forest remnant surrounded by human-modified landscapes in the endangered Brazilian Atlantic Forest. We conducted analyses on community species richness, functional diversity and composition, and aboveground biomass for the overall, adult and juvenile communities. The analysis of the demographic rates indicates a self-thinning phase (reduction in stem density and increase in basal area) characteristic of late-succession stages. In general, we found a reduction in the proportion of simple leaves along with a gradual increase in wood density mostly for the adult tree community and a significant increase in aboveground biomass throughout the years. Despite its reduced size, the fragment studied does not show clear trends of altered forest structure and functional composition dynamics through time. Yet, it holds aboveground biomass values comparable to large undisturbed rainforests, thus indicating that the ecological value of small forest fragments should not be neglected.

Abstract Image

被人类改造地貌包围的热带森林残余树种群落的长期变化
以往的研究表明,小面积和孤立森林片段的树木群落显示出早期演替系统特有的持久结构和功能属性。然而,在长期研究中,尚未全面量化森林面积小和孤立性对树木群落属性的影响。在此,我们分析了 17 年来的永久性地块,以研究在濒危的巴西大西洋森林中,被人类改造景观所包围的小型热带森林残余群落属性的恢复情况。我们对整个群落、成年群落和幼年群落的物种丰富度、功能多样性和组成以及地上生物量进行了分析。对人口统计率的分析表明,晚期演替阶段的特点是自稀疏阶段(茎干密度减少,基部面积增加)。总体而言,我们发现单叶比例降低,木质密度逐渐增加,主要是成年树群落,地上生物量逐年显著增加。尽管面积缩小,但所研究的片段并没有显示出明显的森林结构和功能组成动态变化趋势。然而,它的地上生物量值却可与未受干扰的大型雨林相媲美,这表明小森林片段的生态价值不容忽视。
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来源期刊
Folia Geobotanica
Folia Geobotanica 生物-植物科学
CiteScore
2.40
自引率
0.00%
发文量
18
审稿时长
>12 weeks
期刊介绍: The journal Folia Geobotanica publishes articles in vegetation science, plant ecology and plant systematics, including the topics of temporal community patterns, population and ecosystem ecology, and invasion and conservation ecology. Within the field of plant systematics, Folia Geobotanica welcomes papers on systematic and evolutionary botany, including phylogenetic reconstructions, phylogeographic and biogeographic inferences, studies of microevolutionary processes, taxonomic studies, and broader taxonomic revisions.
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