Data and R scripts for analyses of declines in invertebrate species from the Gulf of Maine, USA, 1997 - 2018

Data files and R scripts are for the analyses that are presented in an article that is
under revision for Biology Communications. The title of the article is: Declines over the
last two decades of five key invertebrate species found on rocky intertidal shores
throughout the western North Atlantic. The three data files contain the abundances of four
gastropod species and the recruitment of barnacles and mussels from 1997 to 2018, monthly
temperature data from three buoys from 2001 to 2018, and pH and aragonite saturation state
from 1997 to 2014. R scripts include details of Bayesian estimates for Poisson regressions
of species over time, clean-up of environmental data, imputation of missing environmental
data and analyses of species versus environmental parameters.

本数据集配套的数据文件与R脚本，均用于支撑一篇已投稿至《Biology Communications》（生物学通讯）且处于审稿修订阶段的论文中的分析内容。
该论文的标题为：《西北大西洋岩质潮间带五种关键无脊椎动物在过去二十年中的种群衰退》。
本次配套的三份数据文件涵盖以下内容：1997年至2018年四种腹足类（gastropod）物种的种群丰度、藤壶与贻贝的种群补充量；2001年至2018年三个浮标（buoy）监测得到的逐月温度数据；以及1997年至2014年的海水pH值与文石饱和度（aragonite saturation state）参数。
配套的R脚本包含以下分析细节：物种时间序列泊松回归（Poisson regression）的贝叶斯估计（Bayesian estimates）流程、环境数据的清洗、缺失环境数据的插补（imputation）方法，以及物种与环境参数之间的关联分析。