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Warming Temperatures Increase Microbial Consumption of Marine Organic Matter.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Warming Temperatures Increase Microbial Consumption of Marine Organic Matter./
作者:	Benson, Sarah H.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	52 p.
附註:	Source: Masters Abstracts International, Volume: 83-02.
Contained By:	Masters Abstracts International83-02.
標題:	Chemical oceanography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28494472
ISBN:	9798516964077

Warming Temperatures Increase Microbial Consumption of Marine Organic Matter.
Benson, Sarah H.

Warming Temperatures Increase Microbial Consumption of Marine Organic Matter. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 52 p.

Source: Masters Abstracts International, Volume: 83-02.

Thesis (M.S.)--University of New Hampshire, 2021.

This item must not be sold to any third party vendors.

Marine microbes are vital to oceanic ecosystems and influence the global climate through their paramount role in Earth's biogeochemical cycles. With this intricate role in ecosystems, it is important to understand the effect of increasing ocean temperatures on the cycling of organic matter (OM), which is hypothesized to contribute a positive feedback to future warming via an acceleration in microbial respiration of OM to CO2. We experimentally investigated the temperature sensitivity of microbial consumption of marine particulate OM focused in the rapidly warming Gulf of Maine during the 2019 and 2020 Fall phytoplankton bloom. The overall rate and quantity of microbial OM (C, N, and P pools) consumption at in situ versus elevated temperatures were quantified within bottle incubations over the course of two weeks. The results indicate that OM incubated at warmer temperatures (+5 - 6°C) was consumed at a faster rate with an overall larger quantity consumed compared to cooler temperatures (12 - 14°C). Additionally, nitrate that initially accumulated from the consumption of particulate organic nitrogen (PON), was readily consumed at later time points at both temperatures, possibly related to the carbon-rich, nitrogen-poor quality of the in situ OM. In 2020, more nitrogen-rich OM was preferentially consumed at cooler temperatures, leaving behind carbon-rich OM. Whereas at warmer temperatures, carbon-rich OM was preferentially consumed presumably due to it being a bioavailable energy source to fuel elevated metabolic rates. The empirically estimated temperature coefficient (Q10) ranged from 2.66 - 3.42 in 2019 versus 0.94 - 1.21 in 2020, dependent on the OM elemental pool, suggesting temperature plays an important role in OM consumption, but is not the only factor contributing to the rates and magnitude of OM consumption by marine microbes.

ISBN: 9798516964077Subjects--Topical Terms:

516760
Chemical oceanography.
Subjects--Index Terms:

Marine

Warming Temperatures Increase Microbial Consumption of Marine Organic Matter.
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500 $a Source: Masters Abstracts International, Volume: 83-02.
500 $a Advisor: Letscher, Robert T.
502 $a Thesis (M.S.)--University of New Hampshire, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a Marine microbes are vital to oceanic ecosystems and influence the global climate through their paramount role in Earth's biogeochemical cycles. With this intricate role in ecosystems, it is important to understand the effect of increasing ocean temperatures on the cycling of organic matter (OM), which is hypothesized to contribute a positive feedback to future warming via an acceleration in microbial respiration of OM to CO2. We experimentally investigated the temperature sensitivity of microbial consumption of marine particulate OM focused in the rapidly warming Gulf of Maine during the 2019 and 2020 Fall phytoplankton bloom. The overall rate and quantity of microbial OM (C, N, and P pools) consumption at in situ versus elevated temperatures were quantified within bottle incubations over the course of two weeks. The results indicate that OM incubated at warmer temperatures (+5 - 6°C) was consumed at a faster rate with an overall larger quantity consumed compared to cooler temperatures (12 - 14°C). Additionally, nitrate that initially accumulated from the consumption of particulate organic nitrogen (PON), was readily consumed at later time points at both temperatures, possibly related to the carbon-rich, nitrogen-poor quality of the in situ OM. In 2020, more nitrogen-rich OM was preferentially consumed at cooler temperatures, leaving behind carbon-rich OM. Whereas at warmer temperatures, carbon-rich OM was preferentially consumed presumably due to it being a bioavailable energy source to fuel elevated metabolic rates. The empirically estimated temperature coefficient (Q10) ranged from 2.66 - 3.42 in 2019 versus 0.94 - 1.21 in 2020, dependent on the OM elemental pool, suggesting temperature plays an important role in OM consumption, but is not the only factor contributing to the rates and magnitude of OM consumption by marine microbes.
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650 4 $a Chemical oceanography. $3 516760
650 4 $a Biogeochemistry. $3 545717
650 4 $a Biological oceanography. $3 2122748
650 4 $a Plankton. $3 1299572
650 4 $a Nitrates. $3 914879
650 4 $a Regression analysis. $3 529831
650 4 $a Hypoxia. $3 3561738
650 4 $a Photosynthesis. $3 518350
650 4 $a Data analysis. $2 bisacsh $3 3515250
650 4 $a Ratios. $3 3561161
650 4 $a Metabolism. $3 541349
650 4 $a Respiration. $3 610890
650 4 $a Ecosystems. $3 595401
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Bioavailability. $3 875104
650 4 $a Nitrogen. $3 1314426
650 4 $a Phosphorus. $3 671778
650 4 $a Experiments. $3 525909
650 4 $a Carbon. $3 604057
650 4 $a Seawater. $3 1532690
650 4 $a Nutrients. $3 3562665
650 4 $a Satellites. $3 924316
650 4 $a Chlorophyll. $3 1004345
650 4 $a Water temperature. $3 2131767
653 $a Marine
653 $a Microbial consumption
653 $a Organic matter
653 $a Temperature
653 $a Warming
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