Isolating the role of the matrix at patch and landscape scales

Global increases in habitat loss and fragmentation have resulted in non-habitat land cover, or the matrix, becoming an increasingly prominent feature of landscapes. The matrix can influence the population dynamics of species in fragments by modifying processes operating locally on individual patches (e.g., edge effects on survival) or at landscape scales (e.g., inter-patch dispersal). However, the relative magnitude of patch- vs. landscape-scale matrix effects on the populations found in patches remains unclear. We established 12 experimental landscapes in which we controlled for habitat amount and fragmentation while manipulating the quality of the matrix around (i) individual habitat patches and (ii) across the entire landscape in a factorial design. We then compared the magnitude of local- and landscape-scale matrix effects on a specialist herbivore, Chelinidea vittiger (Hemiptera: Coreidae). Population size in fragments was influenced by both patch- and landscape-scale treatments: p..., , # Isolating the role of the matrix at patch and landscape scales Dataset DOI: [10.5061/dryad.kprr4xhh6](10.5061/dryad.kprr4xhh6) ## Description of the data and file structure Data is from experimental landscapes set up to test the scale of matrix effects across fragmented landscapes. Forty patches of Opuntia cactus were experimentally planted in 50 by 50-meter landscapes. A total of twelve landscapes were constructed with each in a spatially blocked pair. The matrix vegetation was mechanically reduced at two scales: either a 1m directly surrounding a patch or the remaining landscape 1m away from all patches. Cactus bugs (Chelinidea vittiger) were released in these landscapes and then followed for 3 years across 11 sampling periods. Data set 1 corresponds to population surveys of adult and nymphs for C. vittiger, and data set 2 is the mark recapture histories for all adults in the experiment. ### Files and variables #### File: MatrixScale\_PopulationSurveys.csv **Description:**Â Ab...,# 分离基质在斑块与景观尺度下的作用 全球范围内的栖息地丧失与破碎化加剧，使得非栖息地土地覆盖（即景观基质（matrix））逐渐成为景观中愈发突出的组成部分。景观基质可通过调控单个生境斑块的局域过程（例如对存活产生影响的边缘效应）或景观尺度的过程（例如斑块间扩散），影响破碎化生境中物种的种群动态。但目前仍不清楚，斑块尺度与景观尺度的基质效应对斑块内种群的相对影响强度。本研究构建了12个实验景观，采用析因设计，在控制生境总量与破碎化程度的前提下，分别对（i）单个生境斑块周边以及（ii）整个景观范围内的基质质量进行操控。随后，研究比较了局域尺度与景观尺度的基质效应对专食性植食性昆虫仙人掌缘蝽（Chelinidea vittiger，半翅目：缘蝽科）的影响。破碎化生境中的种群大小同时受到斑块尺度与景观尺度处理的影响：内容未完整呈现（原文为p..., ,） 数据集数字对象标识符（DOI）：10.5061/dryad.kprr4xhh6 ## 数据与文件结构说明 本数据集的数据来源于为测试破碎化景观中基质效应尺度而搭建的实验景观。研究在50米×50米的实验景观中人工种植了40株团扇仙人掌（Opuntia cactus）。共构建12个实验景观，以空间配对的方式进行分组。基质植被通过两种尺度进行机械修剪：一是围绕单个斑块的1米范围，二是所有斑块外围1米以外的剩余景观区域。研究人员在这些景观中释放仙人掌缘蝽，并在3年内开展了11次采样监测。数据集1对应该昆虫成虫与若虫的种群调查数据，数据集2为实验中所有成虫的标记重捕历史记录。 ### 文件与变量 #### 文件：MatrixScale_PopulationSurveys.csv **描述：** 种群调查相关数据（原文此处内容截断为Ab...,）