Assessing avian diversity and community composition along a successional gradient in traditional Lacandon Maya agroforests

Evidence regarding the ability of agroforests to conserve
biological diversity has been mixed; they tend to maintain avian
communities with species richness similar to that of undisturbed forest
ecosystems but generally do not completely preserve community composition.
Using a combination of occupancy modeling and non-metric multidimensional
scaling on point-count data, we assessed changes in avian community
diversity and composition along a successional gradient in traditional
Lacandon Maya agroforests and compared them to protected areas in the
region. Bird species richness and diversity in Lacandon agroforests peaked
in early secondary forest stages. These agroforests’ mean Shannon-Weiner
diversity was 5% higher than that of nearby protected areas, but their
species richness was similar. Community composition in Lacandon agroforests
changed throughout succession, with earlier stages supporting communities
distinctly characterized by generalist species, while subsequent,
less-intensiv...

关于农林复合系统（agroforests）维持生物多样性能力的相关研究结论尚存分歧；此类系统通常可维持与未受干扰森林生态系统物种丰富度相近的鸟类群落，但通常无法完全保留群落组成结构。本研究结合占有模型（occupancy modeling）与非度量多维标度（non-metric multidimensional scaling）方法，基于样点计数数据，针对传统拉坎顿玛雅农林复合系统沿演替梯度的鸟类群落多样性与组成变化展开评估，并将其与该区域的保护区进行对比。拉坎顿玛雅农林复合系统的鸟类物种丰富度与多样性在早期次生林阶段达到峰值。此类农林复合系统的平均香农-威纳多样性指数（Shannon-Weiner diversity）较周边保护区高出5%，但其物种丰富度与保护区相近。拉坎顿玛雅农林复合系统的群落组成随演替进程持续变化：早期阶段的群落以广食性物种为显著特征，而后续低强度……