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Drivers of Intertidal Oyster Reef and Tidal Creek Accretion over the Last Century.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Drivers of Intertidal Oyster Reef and Tidal Creek Accretion over the Last Century./
Author:	Bost, Molly Chapin.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
Description:	141 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-11, Section: B.
Contained By:	Dissertations Abstracts International83-11B.
Subject:	Marine geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29068368
ISBN:	9798438781288

Drivers of Intertidal Oyster Reef and Tidal Creek Accretion over the Last Century.
Bost, Molly Chapin.

Drivers of Intertidal Oyster Reef and Tidal Creek Accretion over the Last Century. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 141 p.

Source: Dissertations Abstracts International, Volume: 83-11, Section: B.

Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2022.

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

Salt marshes and intertidal oyster reefs provide valuable ecosystem services but are being lost or altered due to human modifications at the coast. Restoration projects intend to recover ecosystem services, but little is known about the conditions that promote longevity in restoration projects which requires vertical accretion to keep pace with sea-level rise. Furthermore, while there is documentation of the impacts of land-use change on sediment loads in large river systems and sedimentation in estuaries, small coastal tidal creeks have been largely ignored. To address these issues, this work 1. Quantified intertidal oyster reef growth and identified optimal restoration settings across tidal ranges, atmospheric temperatures, and landscape settings, 2. Evaluated land-use change since 1950 CE and associated impacts on tidal creek sedimentation, and 3. Determined how land-use changes affected sediment and carbon accumulation rates of saltmarshes. Chapter one compared the growth of 12 natural intertidal oyster reefs of varying age across two tidal ranges and landscape settings in coastal North Carolina. Peak growth rates were similar among landscape and tidal settings, but flow baffling associated with fringing reefs and higher summer air temperatures contributed to a lower position of the optimal growth zone in the tidal frame. Chapters 2 and 3 were addressed by comparing sediment accumulation rates before and after a land-use change in 12 tidal creeks across two distinct regions in North Carolina, one region of low relief tidal-creek watersheds where land-use change was dominated by fluctuations in forest, silviculture, and agriculture, and another region of high relief tidal-creek watersheds where land-use change was dominated by suburban development. While accumulation rates accelerated within the creek bottom and adjacent fringing marsh sites after a land-use change, the magnitude of the acceleration differed depending on the morphology of the creek basin. There was faster acceleration in accumulation rates at creek sites within coastal prism incised valleys, but slower acceleration for their adjacent fringing salt marshes. Results from this work will provide guidance for oyster reef restoration and coastal watershed management for sedimentation in tidal creeks and salt marshes.

ISBN: 9798438781288Subjects--Topical Terms:

3173821
Marine geology.
Subjects--Index Terms:

Coastal geology

Drivers of Intertidal Oyster Reef and Tidal Creek Accretion over the Last Century.
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245 1 0 $a Drivers of Intertidal Oyster Reef and Tidal Creek Accretion over the Last Century.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2022
300 $a 141 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-11, Section: B.
500 $a Advisor: Rodriguez, Antonio.
502 $a Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a Salt marshes and intertidal oyster reefs provide valuable ecosystem services but are being lost or altered due to human modifications at the coast. Restoration projects intend to recover ecosystem services, but little is known about the conditions that promote longevity in restoration projects which requires vertical accretion to keep pace with sea-level rise. Furthermore, while there is documentation of the impacts of land-use change on sediment loads in large river systems and sedimentation in estuaries, small coastal tidal creeks have been largely ignored. To address these issues, this work 1. Quantified intertidal oyster reef growth and identified optimal restoration settings across tidal ranges, atmospheric temperatures, and landscape settings, 2. Evaluated land-use change since 1950 CE and associated impacts on tidal creek sedimentation, and 3. Determined how land-use changes affected sediment and carbon accumulation rates of saltmarshes. Chapter one compared the growth of 12 natural intertidal oyster reefs of varying age across two tidal ranges and landscape settings in coastal North Carolina. Peak growth rates were similar among landscape and tidal settings, but flow baffling associated with fringing reefs and higher summer air temperatures contributed to a lower position of the optimal growth zone in the tidal frame. Chapters 2 and 3 were addressed by comparing sediment accumulation rates before and after a land-use change in 12 tidal creeks across two distinct regions in North Carolina, one region of low relief tidal-creek watersheds where land-use change was dominated by fluctuations in forest, silviculture, and agriculture, and another region of high relief tidal-creek watersheds where land-use change was dominated by suburban development. While accumulation rates accelerated within the creek bottom and adjacent fringing marsh sites after a land-use change, the magnitude of the acceleration differed depending on the morphology of the creek basin. There was faster acceleration in accumulation rates at creek sites within coastal prism incised valleys, but slower acceleration for their adjacent fringing salt marshes. Results from this work will provide guidance for oyster reef restoration and coastal watershed management for sedimentation in tidal creeks and salt marshes.
590 $a School code: 0153.
650 4 $a Marine geology. $3 3173821
650 4 $a Sedimentary geology. $3 3173828
650 4 $a Physical oceanography. $3 3168433
650 4 $a Biological oceanography. $3 2122748
653 $a Coastal geology
653 $a Pb-210
653 $a Saltmarsh
653 $a Sedimentation
690 $a 0556
690 $a 0415
690 $a 0416
690 $a 0594
710 2 $a The University of North Carolina at Chapel Hill. $b Marine Sciences. $3 1670010
773 0 $t Dissertations Abstracts International $g 83-11B.
790 $a 0153
791 $a Ph.D.
792 $a 2022
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29068368