气候变化领域集成服务门户(CCPortal): Krill Hotspot Formation and Phenology in the California Current Ecosystem

CCPortal

DOI	10.1029/2020GL088039
	Krill Hotspot Formation and Phenology in the California Current Ecosystem
	Fiechter J.; Santora J.A.; Chavez F.; Northcott D.; Messié M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	In the California Current Ecosystem, krill represent a key link between primary production and higher trophic level species owing to their central position in the food web and tendency to form dense aggregations. However, the strongly advective circulation associated with coastal upwelling may decouple the timing, occurrence, and persistence of krill hotspots from phytoplankton biomass and nutrient sources. Results from a coupled physical-biological model provide insights into fundamental mechanisms controlling the phenology of krill hotspots in the California Current Ecosystem, and their sensitivity to alongshore changes in coastal upwelling intensity. The simulation indicates that dynamics controlling krill hotspot formation, intensity, and persistence on seasonal and interannual timescales are strongly heterogeneous and related to alongshore variations in upwelling-favorable winds, primary production, and ocean currents. Furthermore, regions promoting persistent krill hotspot formation coincide with increased observed abundance of top predators, indicating that the model resolves important ecosystem complexity and function. © 2020. The Authors.
英文关键词	Biology; Coastal engineering; Ocean currents; California Current; Coastal upwelling; Coupled physical-biological models; Fundamental mechanisms; Nutrient sources; Phytoplankton biomass; Primary production; Trophic level; Ecosystems; advection; annual variation; biomass; coastal circulation; complexity; crustacean; ecosystem function; food web; heterogeneity; phenology; phytoplasma; primary production; trophic level; upwelling; California Current; Pacific Ocean; Euphausiacea
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170152
作者单位	Ocean Sciences Department, University of California, Santa Cruz, CA, United States; Fisheries Ecology Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Santa Cruz, CA, United States; Department of Applied Mathematics, University of California, Santa Cruz, CA, United States; Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States; Now at Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Fiechter J.,Santora J.A.,Chavez F.,et al. Krill Hotspot Formation and Phenology in the California Current Ecosystem[J],2020,47(13).
APA	Fiechter J.,Santora J.A.,Chavez F.,Northcott D.,&Messié M..(2020).Krill Hotspot Formation and Phenology in the California Current Ecosystem.Geophysical Research Letters,47(13).
MLA	Fiechter J.,et al."Krill Hotspot Formation and Phenology in the California Current Ecosystem".Geophysical Research Letters 47.13(2020).