Krill Hotspot Formation and Phenology in the California Current Ecosystem

Fiechter, Jerome; Santora, Jarrod A.; Chavez, Francisco; Northcott, Devon; Messié, Monique

doi:10.1029/2020GL088039

i

Krill Hotspot Formation and Phenology in the California Current Ecosystem

2020
By Fiechter, Jerome ; Santora, Jarrod A. ; Chavez, Francisco
Source Geophysical Research Letters 47(13): e2020GL088039, 2020

Details

Journal Title:

Geophysical Research Letters
Personal Author:

Fiechter, Jerome ; Santora, Jarrod A. ; Chavez, Francisco ; Northcott, Devon ; Messié, Monique
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center)
Description:

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.
Source:

Geophysical Research Letters 47(13): e2020GL088039, 2020
DOI:

https://doi.org/10.1029/2020GL088039
Pubmed Central ID:

PMC32728303
Document Type:

Journal Article
Place as Subject:

California Current
Rights Information:

CC BY
Compliance:

PMC
Download URL:

https://repository.library.noaa.gov/view/noaa/28582/noaa_28582_DS1.pdf
File Type:

[PDF - 4.24 MB]
Collection(s):

National Marine Fisheries Service (NMFS)
Main Document Checksum:

urn:sha256:0aed9172928c64381ee8f9435b52b4c2bcff5e97893198d5c57ec8d9bd545371

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