語系:
繁體中文
English
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
Examining sources of primary product...
~
von Biela, Vanessa Rebeca.
FindBook
Google Book
Amazon
博客來
Examining sources of primary production and bottom-up limitations in nearshore ecosystems of the northeast Pacific Ocean using fish based indicators.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Examining sources of primary production and bottom-up limitations in nearshore ecosystems of the northeast Pacific Ocean using fish based indicators./
作者:
von Biela, Vanessa Rebeca.
面頁冊數:
165 p.
附註:
Source: Dissertation Abstracts International, Volume: 76-09(E), Section: B.
Contained By:
Dissertation Abstracts International76-09B(E).
標題:
Aquatic sciences. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3703622
ISBN:
9781321755206
Examining sources of primary production and bottom-up limitations in nearshore ecosystems of the northeast Pacific Ocean using fish based indicators.
von Biela, Vanessa Rebeca.
Examining sources of primary production and bottom-up limitations in nearshore ecosystems of the northeast Pacific Ocean using fish based indicators.
- 165 p.
Source: Dissertation Abstracts International, Volume: 76-09(E), Section: B.
Thesis (Ph.D.)--University of Alaska Fairbanks, 2015.
Our ability to forecast the fate of ecosystems and species hinges on an understanding of how biological systems respond to their environment. In this dissertation, natural indicators of diet (stable isotopes) and production (otolith growth increment width) in two common fishes were used to investigate energy pathways and biophysical relationships in nearshore kelp forests spanning two large marine ecosystems with contrasting oceanography, the upwelling system of the California Current and the downwelling system of the Alaska Coastal Current. Stable isotope analysis indicated high proportions of kelp-derived carbon in two common predatory fish, pelagic-feeding Black Rockfish and benthic-feeding Kelp Greenling. Routinely using both kelp and phytoplankton energy channels reflects strong benthic-pelagic coupling in nearshore marine food webs and may confer food web resilience to perturbations in either energy channel. A network of annual otolith growth chronologies were used to test bottom-up limits of production for nearshore systems and later explore other possible correlates of production. Results of hypothesis tests were consistent with bottom-up forcing of nearshore marine ecosystems, with light and nutrients constraining primary production in pelagic food webs and temperature constraining benthic food webs. A separate exploratory analysis indicated that biophysical relationships were common with (1-2 years) and without time lags and suggested that differences in the abundance and quality of prey influenced the growth of fish through bottom-up processes. The findings from the separate exploratory analysis were generally consistent with findings from hypothesis testing. Lagged relationships were consistent with increasing higher nearshore prey abundance during warm conditions in the Alaska Coastal Current and during cool conditions in the California Current in both pelagic and benthic food webs. Relationships without time lags indicated that benthic prey quality increased during warm conditions in both current systems, while the quality of pelagic nearshore prey increased during cool conditions in the California Current and warm conditions in the Alaska Current. Overall, results of this dissertation demonstrate that kelp provides a source of energy to higher trophic level predators and that continued warming will likely have a negative influence at lower latitudes first (e.g., California Current), while production in higher latitudes (e.g., Gulf of Alaska) may initially increase.
ISBN: 9781321755206Subjects--Topical Terms:
3174300
Aquatic sciences.
Examining sources of primary production and bottom-up limitations in nearshore ecosystems of the northeast Pacific Ocean using fish based indicators.
LDR
:03507nmm a2200289 4500
001
2074796
005
20161020134845.5
008
170521s2015 ||||||||||||||||| ||eng d
020
$a
9781321755206
035
$a
(MiAaPQ)AAI3703622
035
$a
AAI3703622
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
von Biela, Vanessa Rebeca.
$3
3190145
245
1 0
$a
Examining sources of primary production and bottom-up limitations in nearshore ecosystems of the northeast Pacific Ocean using fish based indicators.
300
$a
165 p.
500
$a
Source: Dissertation Abstracts International, Volume: 76-09(E), Section: B.
500
$a
Adviser: Gordon H. Kruse.
502
$a
Thesis (Ph.D.)--University of Alaska Fairbanks, 2015.
520
$a
Our ability to forecast the fate of ecosystems and species hinges on an understanding of how biological systems respond to their environment. In this dissertation, natural indicators of diet (stable isotopes) and production (otolith growth increment width) in two common fishes were used to investigate energy pathways and biophysical relationships in nearshore kelp forests spanning two large marine ecosystems with contrasting oceanography, the upwelling system of the California Current and the downwelling system of the Alaska Coastal Current. Stable isotope analysis indicated high proportions of kelp-derived carbon in two common predatory fish, pelagic-feeding Black Rockfish and benthic-feeding Kelp Greenling. Routinely using both kelp and phytoplankton energy channels reflects strong benthic-pelagic coupling in nearshore marine food webs and may confer food web resilience to perturbations in either energy channel. A network of annual otolith growth chronologies were used to test bottom-up limits of production for nearshore systems and later explore other possible correlates of production. Results of hypothesis tests were consistent with bottom-up forcing of nearshore marine ecosystems, with light and nutrients constraining primary production in pelagic food webs and temperature constraining benthic food webs. A separate exploratory analysis indicated that biophysical relationships were common with (1-2 years) and without time lags and suggested that differences in the abundance and quality of prey influenced the growth of fish through bottom-up processes. The findings from the separate exploratory analysis were generally consistent with findings from hypothesis testing. Lagged relationships were consistent with increasing higher nearshore prey abundance during warm conditions in the Alaska Coastal Current and during cool conditions in the California Current in both pelagic and benthic food webs. Relationships without time lags indicated that benthic prey quality increased during warm conditions in both current systems, while the quality of pelagic nearshore prey increased during cool conditions in the California Current and warm conditions in the Alaska Current. Overall, results of this dissertation demonstrate that kelp provides a source of energy to higher trophic level predators and that continued warming will likely have a negative influence at lower latitudes first (e.g., California Current), while production in higher latitudes (e.g., Gulf of Alaska) may initially increase.
590
$a
School code: 0006.
650
4
$a
Aquatic sciences.
$3
3174300
650
4
$a
Ecology.
$3
516476
650
4
$a
Biological oceanography.
$3
2122748
690
$a
0792
690
$a
0329
690
$a
0416
710
2
$a
University of Alaska Fairbanks.
$b
Fisheries.
$3
3169766
773
0
$t
Dissertation Abstracts International
$g
76-09B(E).
790
$a
0006
791
$a
Ph.D.
792
$a
2015
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3703622
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9307664
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入