東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Linked to FindBook

Google Book

Amazon

博客來

Warming Temperatures Increase Microbial Consumption of Marine Organic Matter.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Warming Temperatures Increase Microbial Consumption of Marine Organic Matter./
Author:	Benson, Sarah H.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	52 p.
Notes:	Source: Masters Abstracts International, Volume: 83-02.
Contained By:	Masters Abstracts International83-02.
Subject:	Chemical oceanography. -
Online resource:	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.
LDR:03012nmm a2200385 4500 001 2346204
005 20220620110443.5
008 241004s2021 ||||||||||||||||| ||eng d
020 $a 9798516964077
035 $a (MiAaPQ)AAI28494472
035 $a AAI28494472
040 $a MiAaPQ $c MiAaPQ
100 1 $a Benson, Sarah H. $3 3685260
245 1 0 $a Warming Temperatures Increase Microbial Consumption of Marine Organic Matter.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 52 p.
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.
590 $a School code: 0141.
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
690 $a 0403
690 $a 0425
690 $a 0416
690 $a 0404
710 2 $a University of New Hampshire. $b Oceanography. $3 3187702
773 0 $t Masters Abstracts International $g 83-02.
790 $a 0141
791 $a M.S.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28494472