Tree composition mitigates the negative effects of urbanization on specialist and generalist forest moth communities

Changes at local and landscape scales impact forests embedded in urban and urbanizing landscapes. In the Northeast USA, urban forest fragments are characterized by smaller sizes, low connectivity, and novel plant assemblages relative to intact natural areas. Disruptions of connectivity from landscape-scale development can negatively impact habitat suitability and colonization by terrestrial insects, but managing local tree compositions may offset negative impacts, especially for phytophagous taxa specialized to host plants.
Here, we surveyed nocturnal moth community diversity using light traps deployed within forest fragments that varied in surrounding urban development, tree floristics, and tree structure.
We found that local and landscape-scale factors interact to affect temperate forest moth communities. In most cases, impervious surface (as a proxy for urbanization) negatively impacted moth communities, whereas the basal area of Lepidoptera-rich host plants positively affected moth ..., , # Tree composition mitigates the negative effects of urbanization on specialist and generalist forest moth communities

R script, JAGS model, and data used to test relationships between moth community metrics, urbanization and forest characteristics in Delaware and Pennsylvania, USA.

Missing data is indicated by NA.

Description of the data and file structure
File 1: JAGS_moth_analysis.txt-

* JAGS model used to test relationships between moth community metrics, urbanization, and forest characteristics.

File 2: JAGS_moth_specializationDistance_analysis.txt

* JAGS model used to test relationships between moth specialization distance, urbanization, and forest characteristics.

File 3: JAGS_moth_richness_rarefied.txt

* JAGS model used to test relationships between moth rarefied richness, urbanization, and forest characteristics.

File 4: moth_bayesian_analysis.Rmd

* R script that loads datasets and formats data for the JAGS model. Has code for summarizing and visualizing posterior dis...,

局域与景观尺度的变化会对嵌入城市及城市化景观中的森林产生影响。在美国东北部，相较于完整自然区域，城市森林片段具有斑块面积更小、连通性更低以及植物群落新颖独特的特征。景观尺度开发引发的连通性中断，会对陆生昆虫的栖息地适宜性与定殖过程产生负面影响，但通过调控局域林木组成可抵消此类负面影响，对于专性寄主植食性类群（phytophagous taxa）而言效果尤为显著。

本研究依托布设于周边城市化程度、植物区系组成与林木结构各异的森林片段内的诱虫灯，对夜行性蛾类群落多样性开展调查。

研究结果表明，局域与景观尺度的因子会共同作用影响温带森林蛾类群落。多数情况下，不透水面（impervious surface，作为城市化水平的替代指标）会对蛾类群落产生负面影响，而富含鳞翅目（Lepidoptera）寄主植物的胸高断面积则会对蛾类群落产生正向影响……

# 林木组成可缓解城市化对专性与广适性森林蛾类群落的负面影响

本数据集包含用于检验美国特拉华州与宾夕法尼亚州内蛾类群落指标、城市化水平与森林特征之间关联的R脚本、JAGS模型及相关数据。

缺失数据以NA标识。

## 数据与文件结构说明
文件1: JAGS_moth_analysis.txt
* 用于检验蛾类群落指标、城市化水平与森林特征间关联的JAGS模型文件。
文件2: JAGS_moth_specializationDistance_analysis.txt
* 用于检验蛾类特化距离、城市化水平与森林特征间关联的JAGS模型文件。
文件3: JAGS_moth_richness_rarefied.txt
* 用于检验蛾类抽平物种丰富度、城市化水平与森林特征间关联的JAGS模型文件。
文件4: moth_bayesian_analysis.Rmd
* 用于加载数据集并为JAGS模型格式化数据的R脚本，包含后验分布汇总与可视化代码……