Krill Hotspot Formation and Phenology in the California Current Ecosystem.
California Current
biophysical model
coastal upwelling
ecosystem hotspots
krill
top predators
Journal
Geophysical research letters
ISSN: 0094-8276
Titre abrégé: Geophys Res Lett
Pays: United States
ID NLM: 9882887
Informations de publication
Date de publication:
16 Jul 2020
16 Jul 2020
Historique:
received:
21
03
2020
revised:
28
05
2020
accepted:
04
06
2020
entrez:
31
7
2020
pubmed:
31
7
2020
medline:
31
7
2020
Statut:
ppublish
Résumé
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.
Identifiants
pubmed: 32728303
doi: 10.1029/2020GL088039
pii: GRL60762
pmc: PMC7380319
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e2020GL088039Informations de copyright
©2020. The Authors.
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