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

Canopy Effects of Octocoral Communit...

Cerpovicz, Alexandria Fay.

FindBook

Google Book

Amazon

博客來

Canopy Effects of Octocoral Communities on Sedimentation: Modern Baffles on the Shallow-Water Reefs of St. John, USVI.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Canopy Effects of Octocoral Communities on Sedimentation: Modern Baffles on the Shallow-Water Reefs of St. John, USVI./
作者:	Cerpovicz, Alexandria Fay.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	74 p.
附註:	Source: Masters Abstracts International, Volume: 81-04.
Contained By:	Masters Abstracts International81-04.
標題:	Marine geology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22584473
ISBN:	9781088367544

Canopy Effects of Octocoral Communities on Sedimentation: Modern Baffles on the Shallow-Water Reefs of St. John, USVI.
Cerpovicz, Alexandria Fay.

Canopy Effects of Octocoral Communities on Sedimentation: Modern Baffles on the Shallow-Water Reefs of St. John, USVI. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 74 p.

Source: Masters Abstracts International, Volume: 81-04.

Thesis (M.S.)--State University of New York at Buffalo, 2019.

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

Recent shifts in the presence and abundance of species on shallow Caribbean coral reefs have left octocorals as some of the dominant species. This transition has created a physical change in the reef profile affecting the hydrodynamics on the reef. Research was conducted to determine if the octocoral canopy changes water flow and sedimentation in and around the canopy. Research took place over 10 weeks in Grootpan Bay, along the southern shore of the island of St. John, USVI. Fifteen paired sampling locations with and without octocoral canopy were selected based on the density of octocorals. The sites were classified further by depth and the height and genera of octocorals present. The effects of water flow and turbulence at the locations were compared based on dissolution of clod cards. The effect of the octocoral canopy on deposition was measured using sediment traps. Sedimentation rate and sediment composition in areas with and without an octocoral canopy were compared based on sediment dry weight, organic content (loss on ignition) and grain size analysis. Mass loss from clod cards was greatest in the canopy suggesting an effect of increased turbulence within the upper part of the canopy. Areas of dense octocoral canopy had greater amounts of sedimentation and coarser, more rounded grains. The deposition of organic material was greatest in canopy areas across the reef system. The increase in turbulence in the canopy was likely due to wave driven oscillatory flow interacting with the density and morphology of the colonies making up the canopy. Sediment traps in the canopy likely had greater sediment accumulation due to both increased turbulence resuspending and subsequently depositing sediments, and suspended sediments depositing out of flow when moving onto the reef system. The presence of octocoral canopies and the reworking of sediment within them may affect the success of settling larvae and potential for reef building within these depositional environments.

ISBN: 9781088367544Subjects--Topical Terms:

3173821
Marine geology.
Subjects--Index Terms:

Coral reef

Canopy Effects of Octocoral Communities on Sedimentation: Modern Baffles on the Shallow-Water Reefs of St. John, USVI.
LDR:03102nmm a2200337 4500 001 2280181
005 20210830065506.5
008 220723s2019 ||||||||||||||||| ||eng d
020 $a 9781088367544
035 $a (MiAaPQ)AAI22584473
035 $a AAI22584473
040 $a MiAaPQ $c MiAaPQ
100 1 $a Cerpovicz, Alexandria Fay. $0 (orcid)0000-0002-7772-6219 $3 3558686
245 1 0 $a Canopy Effects of Octocoral Communities on Sedimentation: Modern Baffles on the Shallow-Water Reefs of St. John, USVI.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 74 p.
500 $a Source: Masters Abstracts International, Volume: 81-04.
500 $a Advisor: Lasker, Howard.
502 $a Thesis (M.S.)--State University of New York at Buffalo, 2019.
506 $a This item must not be sold to any third party vendors.
520 $a Recent shifts in the presence and abundance of species on shallow Caribbean coral reefs have left octocorals as some of the dominant species. This transition has created a physical change in the reef profile affecting the hydrodynamics on the reef. Research was conducted to determine if the octocoral canopy changes water flow and sedimentation in and around the canopy. Research took place over 10 weeks in Grootpan Bay, along the southern shore of the island of St. John, USVI. Fifteen paired sampling locations with and without octocoral canopy were selected based on the density of octocorals. The sites were classified further by depth and the height and genera of octocorals present. The effects of water flow and turbulence at the locations were compared based on dissolution of clod cards. The effect of the octocoral canopy on deposition was measured using sediment traps. Sedimentation rate and sediment composition in areas with and without an octocoral canopy were compared based on sediment dry weight, organic content (loss on ignition) and grain size analysis. Mass loss from clod cards was greatest in the canopy suggesting an effect of increased turbulence within the upper part of the canopy. Areas of dense octocoral canopy had greater amounts of sedimentation and coarser, more rounded grains. The deposition of organic material was greatest in canopy areas across the reef system. The increase in turbulence in the canopy was likely due to wave driven oscillatory flow interacting with the density and morphology of the colonies making up the canopy. Sediment traps in the canopy likely had greater sediment accumulation due to both increased turbulence resuspending and subsequently depositing sediments, and suspended sediments depositing out of flow when moving onto the reef system. The presence of octocoral canopies and the reworking of sediment within them may affect the success of settling larvae and potential for reef building within these depositional environments.
590 $a School code: 0656.
650 4 $a Marine geology. $3 3173821
653 $a Coral reef
653 $a Fringing reef
653 $a Modern reef
653 $a Sedimentology
690 $a 0556
710 2 $a State University of New York at Buffalo. $b Geology. $3 3276846
773 0 $t Masters Abstracts International $g 81-04.
790 $a 0656
791 $a M.S.
792 $a 2019
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22584473