PDF(Pubmed)
Abstract：
Pollution has led to a decline of benthic invertebrate biodiversity of Narragansett Bay, raising questions about effects on ecosystem functions and services including shellfish production, energy flow to fishes, and biogeochemical cycles. Changes in community composition and taxonomic distinctness (biodiversity) were calculated from the 1950s-when quantitative benthic invertebrate data first became available-to 2015. Change in community composition of the bay was correlated with changes in dissolved inorganic nitrogen, dissolved oxygen, and sediment contaminants. A mid-bay reference site showed moderate changes in community composition but no change in biodiversity. In contrast, a more impacted site in the upper bay showed substantial differences in community composition over time and a decline in taxonomic distinctness. Bay-wide, as inputs of some stressors such as nutrients and sediment contaminants have declined, there are signs of recovery of benthic biodiversity but other stressors such as temperature and watershed development are increasing.
摘要：
污染导致纳拉甘西特湾底栖无脊椎动物生物多样性下降，提出对生态系统功能和服务的影响的问题，包括贝类生产，能量流向鱼类，和生物地球化学循环。从1950年代开始计算群落组成和分类学差异（生物多样性）的变化-当定量底栖无脊椎动物数据首次出现时-到2015年。海湾群落组成的变化与溶解无机氮的变化相关，溶解氧,和沉积物污染物。海湾中部参考地点显示，群落组成发生了适度变化，但生物多样性没有变化。相比之下,上湾受影响更大的地点随着时间的推移，群落组成存在很大差异，分类学差异也在下降。Bay-wide,随着养分和沉积物污染物等压力源的输入下降，海底生物多样性有恢复的迹象，但温度和流域发展等其他压力因素正在增加。
