Seasonal Dynamics of Primary Production in the Southeastern Bering Sea Assessed Using Continuous Temporal and Vertical Dissolved Oxygen and Chlorophyll‐a Measurements

Nielsen, Jens M.; Pelland, Noel A.; Bell, Shaun W.; Lomas, Michael W.; Eisner, Lisa B.; Stabeno, Phyllis; Harpold, Colleen; Stalin, Scott; Mordy, Calvin W.

doi:10.1029/2022JC019076

i

Seasonal Dynamics of Primary Production in the Southeastern Bering Sea Assessed Using Continuous Temporal and Vertical Dissolved Oxygen and Chlorophyll‐a Measurements

2023
By Nielsen, Jens M. ; Pelland, Noel A. ; Bell, Shaun W. ; ...

Details

Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Nielsen, Jens M. ; Pelland, Noel A. ; Bell, Shaun W. ; Lomas, Michael W. ; Eisner, Lisa B. ; Stabeno, Phyllis ; Harpold, Colleen ; Stalin, Scott ; Mordy, Calvin W.
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; OAR (Oceanic and Atmospheric Research) ; AFSC (Alaska Fisheries Science Center) ; CICOES (Cooperative Institute for Climate, Ocean and Ecosystem Studies) ; PMEL (Pacific Marine Environmental Laboratory)
Description:

The Bering Sea and other high-latitude systems are experiencing unprecedented changes related to climate warming and the consequent loss of sea ice. Understanding how such changes influence primary production is a pressing question. Here, we quantify primary production rates in the southeastern Bering Sea over 4 years (2016–2019) at daily to weekly time resolution. A moored high-resolution Profiling Crawler was used in combination with in situ sampling to collect physical and biological data in the ocean's upper 50 m. We used dissolved oxygen (O2) data to estimate gross and net primary production (NPP), and chlorophyll-a (Chl-a), temperature, and irradiance data to model NPP rates. We then assessed seasonal variation in phytoplankton production rates, phytoplankton community growth rates (urn:x-wiley:21699275:media:jgrc25461:jgrc25461-math-0001) and explored to what extent summer phytoplankton community growth rates may be influenced by nitrogen limitation. Our analyses revealed that the majority of gross primary production (GPP) and net community production occurs in association with the spring phytoplankton bloom. After the bloom, the water column generally experienced low GPP and net biological carbon consumption. Phytoplankton growth rates were commonly suppressed in late summer due to apparent nitrogen depletion. Using high temporal resolution vertically resolved measurements of O2 and Chl-a, our analyses provides important insight into how biogeochemical cycles, phytoplankton community growth rates, and carbon available for export vary seasonally in the southeastern Bering Sea.
Keywords:

Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Geophysics Oceanography Space And Planetary Science Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Space And Planetary Science Earth And Planetary Sciences (miscellaneous) Geochemistry And Petrology Space And Planetary Science
Source:

Journal of Geophysical Research: Oceans, 128(5)
DOI:

https://doi.org/10.1029/2022JC019076
ISSN:

2169-9275 ; 2169-9291
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

urn:sha256:140e09e583260bbafe50181de1c1ac5142e9f0176dc26f5ba06d5eed0c8e9082
Download URL:

https://repository.library.noaa.gov/view/noaa/51165/noaa_51165_DS1.pdf
File Type:

[PDF - 1.48 MB ]

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