期刊
MARINE ECOLOGY PROGRESS SERIES
卷 525, 期 -, 页码 153-170出版社
INTER-RESEARCH
DOI: 10.3354/meps11251
关键词
Pacific herring; Surf smelt; Pacific sand lance; Three-spine stickleback; Gelatinous zooplankton; Human population density; Climate; Commercial harvest
资金
- US EPA's National Estuary Program
- Washington Department of Ecology's Intensively Monitored Watersheds Program
- Washington Department of Natural Re sources
- Northwest Fisheries Science Center
- Army Corps of Engineers
- Port of Bellingham
- NOAA Fisheries
- Washington Department of Fish and Wildlife (WDFW)
- NOAA Sustainable Fisheries
Coastal ecosystems face a variety of natural and anthropogenic influences, raising questions about mechanisms by which species abundance and composition change over time. We examined these questions by synthesizing 6 surface-trawling efforts in greater Puget Sound, Washington (USA), spanning 40 yr, and then determining changes in forage fish abundance and composition and jellyfish prevalence. We also assessed whether patterns were associated with potential anthropogenic pressures (human population density and commercial harvest) as well as large-scale climate signals. We found evidence for trends in abundance of all forage species in 4 sub-basins of Puget Sound. Cumulative distribution functions of catch per unit effort indicate that the historically dominant forage fishes (Pacific herring and surf smelt) have declined in surface waters in 2 sub-basins (Central and South Puget Sound) by up to 2 orders of magnitude. However, 2 other species (Pacific sand lance and three-spine stickleback) increased in all 4 sub-basins. Consequently, species composition diverged among sub-basins over the last 40 yr. In addition, jelly fish-dominated catches increased 3- to 9-fold in Central and South Puget Sound, and abundance positively tracked human population density across all basins. The strongest predictors of forage fish declines were human population density and commercial harvest. Climate signals offered additional explanatory power for forage fish but not jellyfish catch. These patterns suggest possible linkages between coastal anthropogenic activities (e.g. development, pollution) and the abundance of forage fish and jellyfish in pelagic waters. Our findings also provide a basis for improving indicators for assessment, monitoring, and spatial planning to rehabilitate pelagic ecosystems.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据