Patterns of shade plant diversity in four agroforestry systems across Central America: a meta-analysis.
Patterns of shade plant diversity in four agroforestry systems across Central America: a meta-analysis.
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中美洲四个农林线系统中植物多样性的阴影模式：一项荟萃分析。
DOI：
10.1038/s41598-023-35578-7
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发表时间：
2023-05-26
影响因子：
4.6
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中科院分区：
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农林复合系统可以潜在地增加农业景观中的树木多样性，但到目前为止，在大的空间尺度上，不同的农林复合系统（AFS）内的遮荫植物多样性的模式知之甚少。使用汇编的植物库存数据（来自23个来源，2517个地块和148，255个个体），包括中美洲六个国家的四个AFS（阴影咖啡;阴影可可;分散在牧场上的树木;和活栅栏），我们估计了不同的多样性指标，以评估不同AFS对遮荫植物的保护价值。共记录到458种阴生植物。原生林物种占记录的阴生物种的28%，但只有6%的记录的个人。考虑到稀有物种丰富度，没有一个AFS在各国之间始终是最多样化的。牧场上的树木可能达到与可可和咖啡系统相似的物种丰富度，但需要7-30倍的采样面积。就组成而言，不同国家的农林系统共有29个物种，说明农民对提供木材、木柴和水果的物种有很大的选择压力。我们的研究强调了不同AFS对农业景观中树木多样性保护的潜在贡献和局限性。
Agroforestry systems can potentially increase tree diversity within agricultural landscapes, but to date, there is little understanding of the patterns of shade plant diversity within different agroforestry systems (AFS) at large spatial scales. Using compiled plant inventory data (from 23 sources, 2517 plots, and 148,255 individuals) encompassing four AFS (shaded coffee; shaded cocoa; dispersed trees on pastures; and live fences) across six countries in Central America we estimated different metrics of diversity to assess the conservation value of different AFS for shade plants. 458 shade plant species were recorded across the four agroforestry systems. Primary forest species accounted for 28% of the shade species recorded, but only 6% of the recorded individuals. No single AFS was consistently the most diverse across countries when considering rarefied species richness. Trees on pastures can potentially reach a similar species richness as cocoa and coffee systems but require sampled areas 7–30 times larger. In terms of composition, 29 species were shared across the agroforestry systems in different countries, illustrating the strong selection pressure of farmers for species that provide timber, firewood, and fruit. Our study highlights the potential contribution and limitations of different AFS for tree diversity conservation within agricultural landscapes.