東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Nutrient and Organic Matter Cycling ...

Lowman, Heili Eileen.

FindBook

Google Book

Amazon

博客來

Nutrient and Organic Matter Cycling in the Nearshore Ocean and Marine Sediment of the Santa Barbara Channel.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Nutrient and Organic Matter Cycling in the Nearshore Ocean and Marine Sediment of the Santa Barbara Channel./
作者:	Lowman, Heili Eileen.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	191 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-04, Section: B.
Contained By:	Dissertations Abstracts International82-04B.
標題:	Biogeochemistry. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27998516
ISBN:	9798678120946

Nutrient and Organic Matter Cycling in the Nearshore Ocean and Marine Sediment of the Santa Barbara Channel.
Lowman, Heili Eileen.

Nutrient and Organic Matter Cycling in the Nearshore Ocean and Marine Sediment of the Santa Barbara Channel. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 191 p.

Source: Dissertations Abstracts International, Volume: 82-04, Section: B.

Thesis (Ph.D.)--University of California, Santa Barbara, 2020.

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

Coastal regions lie along a dual ecotone: the boundary of terrestrial and marine ecosystems and at the convergence of fresh and saltwater aquatic ecosystems. These ecotones are biogeochemically active regions that are stimulated by the supply and transport of organic material by way of their aquatic linkages. My dissertation addresses questions of organic matter and nutrient supply, retention, and transformation in the coastal regions of the Santa Barbara Channel with a focus on maintaining sufficiently high nitrogen concentrations to support primary production of kelp forests during low nutrient periods. To examine fluctuations of nitrogen concentrations in nearshore marine waters, and their relationships with physical and biological factors, I conducted intensive sampling for ammonium concentrations during the summer season and found a distinct periodicity in concentrations throughout the full water column in relationship to the tidal cycle. To determine if permeable marine sediment is a source of dissolved inorganic nitrogen to the overlying water column, I conducted a multi-year series of nutrient flux measurements using flow-through sediment bioreactors containing sediment collected near kelp forests and found that they are a source of ammonium and total dissolved nitrogen during the summer season. To investigate organic matter supply to marine sediment, I analyzed coastal sediment samples for evidence of terrestrial organic matter input before, during, and after a period with considerable rainfall that followed a 5 year drought, and I found evidence in both stream and marine sediment of terrestrial organic matter inputs becoming increasingly varied and less degraded over time. Using a Santa Barbara Coastal LTER dataset, I examined carbon and nitrogen in giant kelp tissue to evaluate patterns in nutritional content as they relate to changes in seawater temperature and larger oceanographic indices. I found that the nutritional content of giant kelp tissue collected in the Santa Barbara Channel has declined over the past 17 years, and this decline is correlated with increasing seawater temperatures and fluctuations of the North Pacific Gyre Oscillation index.

ISBN: 9798678120946Subjects--Topical Terms:

545717
Biogeochemistry.
Subjects--Index Terms:

Coastal

Nutrient and Organic Matter Cycling in the Nearshore Ocean and Marine Sediment of the Santa Barbara Channel.
LDR:03401nmm a2200385 4500 001 2280241
005 20210830065522.5
008 220723s2020 ||||||||||||||||| ||eng d
020 $a 9798678120946
035 $a (MiAaPQ)AAI27998516
035 $a AAI27998516
040 $a MiAaPQ $c MiAaPQ
100 1 $a Lowman, Heili Eileen. $3 3558748
245 1 0 $a Nutrient and Organic Matter Cycling in the Nearshore Ocean and Marine Sediment of the Santa Barbara Channel.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 191 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-04, Section: B.
500 $a Advisor: Melack, John M.
502 $a Thesis (Ph.D.)--University of California, Santa Barbara, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Coastal regions lie along a dual ecotone: the boundary of terrestrial and marine ecosystems and at the convergence of fresh and saltwater aquatic ecosystems. These ecotones are biogeochemically active regions that are stimulated by the supply and transport of organic material by way of their aquatic linkages. My dissertation addresses questions of organic matter and nutrient supply, retention, and transformation in the coastal regions of the Santa Barbara Channel with a focus on maintaining sufficiently high nitrogen concentrations to support primary production of kelp forests during low nutrient periods. To examine fluctuations of nitrogen concentrations in nearshore marine waters, and their relationships with physical and biological factors, I conducted intensive sampling for ammonium concentrations during the summer season and found a distinct periodicity in concentrations throughout the full water column in relationship to the tidal cycle. To determine if permeable marine sediment is a source of dissolved inorganic nitrogen to the overlying water column, I conducted a multi-year series of nutrient flux measurements using flow-through sediment bioreactors containing sediment collected near kelp forests and found that they are a source of ammonium and total dissolved nitrogen during the summer season. To investigate organic matter supply to marine sediment, I analyzed coastal sediment samples for evidence of terrestrial organic matter input before, during, and after a period with considerable rainfall that followed a 5 year drought, and I found evidence in both stream and marine sediment of terrestrial organic matter inputs becoming increasingly varied and less degraded over time. Using a Santa Barbara Coastal LTER dataset, I examined carbon and nitrogen in giant kelp tissue to evaluate patterns in nutritional content as they relate to changes in seawater temperature and larger oceanographic indices. I found that the nutritional content of giant kelp tissue collected in the Santa Barbara Channel has declined over the past 17 years, and this decline is correlated with increasing seawater temperatures and fluctuations of the North Pacific Gyre Oscillation index.
590 $a School code: 0035.
650 4 $a Biogeochemistry. $3 545717
650 4 $a Ecology. $3 516476
650 4 $a Aquatic sciences. $3 3174300
653 $a Coastal
653 $a Marine
653 $a Nitrogen
653 $a Nutrients
653 $a Organic matter
653 $a Sediment
690 $a 0425
690 $a 0329
690 $a 0792
710 2 $a University of California, Santa Barbara. $b Ecology, Evolution & Marine Biology. $3 1683731
773 0 $t Dissertations Abstracts International $g 82-04B.
790 $a 0035
791 $a Ph.D.
792 $a 2020
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27998516