Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas
It has been hypothesized that climate change will reduce the strength and episodic nature of vernal phytoplankton blooms, increase heterotrophy of microbes and zooplankton, and weaken the tight coupling between pelagic and benthic production that is characteristic of Arctic continental shelves. As a...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
University of Alaska Fairbanks
2019
|
Subjects: | |
Online Access: | http://pqdtopen.proquest.com/#viewpdf?dispub=27548863 |
id |
ftproquest:oai:pqdtoai.proquest.com:27548863 |
---|---|
record_format |
openpolar |
spelling |
ftproquest:oai:pqdtoai.proquest.com:27548863 2023-05-15T14:50:54+02:00 Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas O'Daly, Stephanie Hicks 2019-01-01 00:00:01.0 http://pqdtopen.proquest.com/#viewpdf?dispub=27548863 ENG eng University of Alaska Fairbanks http://pqdtopen.proquest.com/#viewpdf?dispub=27548863 Chemical Oceanography|Biogeochemistry thesis 2019 ftproquest 2021-03-13T17:37:25Z It has been hypothesized that climate change will reduce the strength and episodic nature of vernal phytoplankton blooms, increase heterotrophy of microbes and zooplankton, and weaken the tight coupling between pelagic and benthic production that is characteristic of Arctic continental shelves. As a part of the Arctic Shelf Growth, Advection, Respiration, and Deposition rates measurement (ASGARD) project, I quantified sinking particle fluxes and incubated sinking particles to measure the rate of microbial respiration associated with those particles. These measurements were used to characterize the strength of the pelagic-benthic connection. After a record-breaking year of warm temperatures and low-ice conditions in the northern Bering and southern Chukchi Seas, we observed massive vernal fluxes of sinking particulate organic carbon, ranking amongst the highest observed in the global oceans. Moreover, low rates of particle-associated microbial respiration indicate negligible recycling of sinking organic matter within the water column. These results suggest that the strength of the biological carbon pump may be maintained or enhanced in a warming Arctic, supporting strong benthic and upper trophic level productivity and carbon export. Thesis Arctic Chukchi Climate change Phytoplankton Zooplankton PQDT Open: Open Access Dissertations and Theses (ProQuest) Arctic |
institution |
Open Polar |
collection |
PQDT Open: Open Access Dissertations and Theses (ProQuest) |
op_collection_id |
ftproquest |
language |
English |
topic |
Chemical Oceanography|Biogeochemistry |
spellingShingle |
Chemical Oceanography|Biogeochemistry O'Daly, Stephanie Hicks Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas |
topic_facet |
Chemical Oceanography|Biogeochemistry |
description |
It has been hypothesized that climate change will reduce the strength and episodic nature of vernal phytoplankton blooms, increase heterotrophy of microbes and zooplankton, and weaken the tight coupling between pelagic and benthic production that is characteristic of Arctic continental shelves. As a part of the Arctic Shelf Growth, Advection, Respiration, and Deposition rates measurement (ASGARD) project, I quantified sinking particle fluxes and incubated sinking particles to measure the rate of microbial respiration associated with those particles. These measurements were used to characterize the strength of the pelagic-benthic connection. After a record-breaking year of warm temperatures and low-ice conditions in the northern Bering and southern Chukchi Seas, we observed massive vernal fluxes of sinking particulate organic carbon, ranking amongst the highest observed in the global oceans. Moreover, low rates of particle-associated microbial respiration indicate negligible recycling of sinking organic matter within the water column. These results suggest that the strength of the biological carbon pump may be maintained or enhanced in a warming Arctic, supporting strong benthic and upper trophic level productivity and carbon export. |
format |
Thesis |
author |
O'Daly, Stephanie Hicks |
author_facet |
O'Daly, Stephanie Hicks |
author_sort |
O'Daly, Stephanie Hicks |
title |
Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas |
title_short |
Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas |
title_full |
Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas |
title_fullStr |
Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas |
title_full_unstemmed |
Carbon Flux and Particle-Associated Microbial Remineralization Rates in the Northern Bering and Southern Chukchi Seas |
title_sort |
carbon flux and particle-associated microbial remineralization rates in the northern bering and southern chukchi seas |
publisher |
University of Alaska Fairbanks |
publishDate |
2019 |
url |
http://pqdtopen.proquest.com/#viewpdf?dispub=27548863 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Chukchi Climate change Phytoplankton Zooplankton |
genre_facet |
Arctic Chukchi Climate change Phytoplankton Zooplankton |
op_relation |
http://pqdtopen.proquest.com/#viewpdf?dispub=27548863 |
_version_ |
1766321960456814592 |