Ants, Birds, and Tree Diversity: Coffee agroecosystem meta-analysis

Data on richness and abundance of three taxonomic groups (ants, birds, and trees) were collected in coffee agroecosystems (varying in management style) and nearby forest fragments in Mesoamerica and South America to assess the impact of coffee management intensification on biodiversity. Original data were collected in several regions/countries including Mexico (Veracruz, Chiapas, Soconusco), Guatemala, Peru, Colombia, and Nicaragua. Data were collected in several different projects by the co-owners of the data, but were generally collected between 1993-2006. Bird data come exclusively from 10min 25m radius point count observations. Tree data are species or mophospecies data from coffee or forest plots, and usually include complete enumeration of all trees in the plot. Ant data were collected with variable methods depending on project, but include pitfalls, Winkler traps, tuna baiting, and visual searches. Most projects also included data about the vegetation characteristics in their study sites including canopy cover, tree heights, shade strata, numbers of epiphytes, etc. These project datasets were complied with the extent of conducting a meta-analysis to examine the overall trends in biodiversity decline across coffee systems varying in management intensity.

为评估咖啡种植管理集约化对生物多样性的影响，研究人员在中美洲与南美洲的咖啡农业生态系统（管理模式各异）及邻近森林片段中，收集了蚂蚁、鸟类、树木3个分类群的物种丰富度与个体多度数据。原始数据采集于包括墨西哥（韦拉克鲁斯州、恰帕斯州、索科努斯科地区）、危地马拉、秘鲁、哥伦比亚及尼加拉瓜在内的多个国家与地区。该数据集由多位数据共同所有者依托多项不同研究项目整合而成，整体采集时段大致介于1993年至2006年之间。鸟类数据仅通过10分钟25米半径样点计数法获取；树木数据来自咖啡种植区或森林样地的物种/形态种记录，通常涵盖样地内所有树木的全计数统计；蚂蚁数据的采集方法因项目而异，涵盖陷阱法、温克勒诱集器（Winkler traps）法、金枪鱼诱饵法及目视搜寻法。多数研究项目还同步采集了样地的植被特征数据，包括冠层覆盖度、树高、荫蔽层结构、附生植物数量等。本次整合的项目数据集旨在开展元分析（meta-analysis），以探究不同管理强度咖啡农业系统中生物多样性下降的整体趋势。