Diversity – volume relationships: adding structural arrangement and volume to species – area relationships across forest macrosystems
Diversity – volume relationships: adding structural arrangement and volume to species – area relationships across forest macrosystems
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多样性-蓄积量关系：在森林宏观系统中增加物种-面积关系的结构安排和蓄积量
DOI：
10.1111/ecog.06723
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发表时间：
2023-07
期刊：
影响因子：
5.9
通讯作者：
E. LaRue;Anna G. Downing;Sheila Saucedo;A. Rocha;S. V. Zesati;Vicente Mata-Silva;Michael G. Harvey
中科院分区：
文献类型：
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作者：
E. LaRue;Anna G. Downing;Sheila Saucedo;A. Rocha;S. V. Zesati;Vicente Mata-Silva;Michael G. Harvey
物种-面积关系（SAR）是一种常见的模式，多样性随采样面积的增加而增加，但生态系统是三维的（3D），多样性-体积关系（DVRs）可能存在于植被体积变化很大的生态系统中。我们测试了森林植被体积，作为区域的三维延伸，是否在国家生态观测站网络（NEON）中对五种生物的分类（物种）和结构（排列）多样性有重要的预测作用。利用NEON的离散返回激光雷达测量了NEON地块区域内的植被体积和四种结构布置指标。物种丰富度测量为在NEON样地取样区域内的林下植物、树木、繁殖陆鸟、小型哺乳动物和地面甲虫的物种数量。结果表明，在美国森林大系统中，体积对林下植物的丰富度有负预测，对乔木和甲虫的丰富度有正预测，而对鸟类和小型哺乳动物的丰富度没有正预测。此外，体积是描述整个美国森林宏观系统生态系统内森林植被内部和外部异质性（结构安排）的几个指标的重要预测因子。在生物类群中，体积与物种丰富度或结构排列之间存在一些显著的站点水平关系，但并非在所有站点上都存在。我们的研究表明，以往的工作主要集中在栖息地的二维概念上，可以扩展到三维栖息地空间，但dvr的强度和正负方向可能在分类学或地理上有所不同。
The species – area relationship (SAR) is a common pattern in which diversity increases with the area sampled, but ecosystems are three‐dimensional (3D) and diversity – volume relationships (DVRs) may exist in ecosystems that vary substantially in their vegetation volume. We tested whether forest vegetation volume, as a 3D extension of area in SARs, was a significant predictor of taxonomic (species) and structural (arrangement) diversity in five groups of organisms across the National Ecological Observatory Network (NEON). Vegetation volume and four structural arrangement metrics within the area of NEON plots were measured using NEON's discrete return lidar. Species richness was measured as the number of species within the respective NEON plot sampling area for understory plants, trees, breeding land birds, small mammals, and ground beetles. We found that volume negatively predicted understory plants and positively predicted tree and beetle species richness across the USA forest macrosystem, but not bird and small mammal species richness. Furthermore, volume was a significant predictor of several metrics that describe the internal and external heterogeneity of vegetation in forests (structural arrangement) within the ecosystem across the USA forest macrosystem. There were several significant within site‐level relationships, but not at all sites, between volume and species richness or structural arrangement in organism groups. Our study indicates that previous work that has focused on a 2D conceptualization of habitat can be expanded to 3D habitat space, but that the strength and the positive or negative direction of DVRs may vary taxonomically or geographically.