fronhofer_2015_ELE_dryad_data

Data for Fronhofer, Klecka, Melian & Altermatt (2015): Condition-dependent movement and dispersal in experimental metacommunities, Ecology Letters. Data files: 1) dispersal_data.txt: This file contains the dispersal data recored as manual counts at the end of the experiment. "treatment" refers to the experimental community composition. "density" is reported in individuals/ml. patch: "S" (starting conditions, i.e., at the beginning of the experiment), "P1" (start/origin patch), "P2" (target patch) 2) movement_data.txt: contains the individual-level movement and morphology data from the video analysis. The file contains information on: velocity ("velocity_metric") measured in mm/s, turning angle distribution width ("sd_turning") measured as the standard devidation, the net distance travelled ("euclidean_metric") measured in mm, as well as morphological parameters, specifically the length along the major axis in µm and the aspect ratio (major/minor). 3) growthCurves_data.txt: Sample-level density data from video analysis for determining r0 and K of all three species (see Fig. S1). "time" is reported in hours and captures the time since the beginning of the growth experiment. 4) communityDynamics_data_interactionCoefficients.txt: Sample-level data from video analysis of all 2-species communities used to determine interaction coefficients (see Fig. S3).本数据集对应Fronhofer、Klecka、Melian与Altermatt（2015）的研究：实验集合群落（experimental metacommunities）中依赖于状态的移动与扩散，发表于《Ecology Letters》（《生态学通讯》）。 数据文件如下： 1. dispersal_data.txt：包含实验结束时经人工计数记录的扩散数据。其中"treatment（处理组）"指代实验群落组成；"density（密度）"单位为个体/毫升；"patch（斑块）"分为三类："S"（初始状态，即实验开始时）、"P1"（起始/源斑块）、"P2"（目标斑块）。 2. movement_data.txt：包含来自视频分析的个体水平移动与形态学数据。文件记录的参数包括：以mm/s为单位的移动速率（"velocity_metric"，速度指标）、以标准差衡量的转向角分布宽度（"sd_turning"，转向标准差）、以mm为单位的净移动距离（"euclidean_metric"，欧氏距离指标），以及形态学参数：沿长轴的长度（单位：µm，微米）和长宽比（长轴/短轴）。 3. growthCurves_data.txt：来自视频分析的样本水平密度数据，用于确定三个物种种群的内禀增长率$r_0$和环境容纳量$K$（详见补充图S1）。其中"time（时间）"单位为小时，记录自生长实验启动以来的时长。 4. communityDynamics_data_interactionCoefficients.txt：来自所有双物种种群群落的视频分析样本水平数据，用于计算种间相互作用系数（详见补充图S3）。