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

Mixotrophy in freshwater foodwebs.

DeVaul, Sarah B.

FindBook

Google Book

Amazon

博客來

Mixotrophy in freshwater foodwebs.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Mixotrophy in freshwater foodwebs./
作者:	DeVaul, Sarah B.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	124 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-10(E), Section: B.
Contained By:	Dissertation Abstracts International77-10B(E).
標題:	Aquatic sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10111316
ISBN:	9781339745251

Mixotrophy in freshwater foodwebs.
DeVaul, Sarah B.

Mixotrophy in freshwater foodwebs. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 124 p.

Source: Dissertation Abstracts International, Volume: 77-10(E), Section: B.

Thesis (Ph.D.)--Temple University, 2016.

Environmental heterogeneity in both space and time has significant repercussions for community structure and ecosystem processes. Dimictic lakes provide examples of vertically structured ecosystems that oscillate between stable and mixed thermal layers on a seasonal basis. Vertical patterns in abiotic conditions vary during both states, but with differing degrees of variation. For example, during summer thermal stratification there is high spatial heterogeneity in temperature, nutrients, dissolved oxygen and photosynthetically active radiation. The breakdown of stratification and subsequent mixing of the water column in fall greatly reduces the stability of the water column to a vertical gradient in light. Nutrients and biomass that were otherwise constrained to the depths are also suspended, leading to a boom in productivity.

ISBN: 9781339745251Subjects--Topical Terms:

3174300
Aquatic sciences.

Mixotrophy in freshwater foodwebs.
LDR:03518nmm a2200313 4500 001 2116704
005 20170508081318.5
008 180830s2016 ||||||||||||||||| ||eng d
020 $a 9781339745251
035 $a (MiAaPQ)AAI10111316
035 $a AAI10111316
040 $a MiAaPQ $c MiAaPQ
100 1 $a DeVaul, Sarah B. $3 3278442
245 1 0 $a Mixotrophy in freshwater foodwebs.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 124 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-10(E), Section: B.
500 $a Adviser: Robert W. Sanders.
502 $a Thesis (Ph.D.)--Temple University, 2016.
520 $a Environmental heterogeneity in both space and time has significant repercussions for community structure and ecosystem processes. Dimictic lakes provide examples of vertically structured ecosystems that oscillate between stable and mixed thermal layers on a seasonal basis. Vertical patterns in abiotic conditions vary during both states, but with differing degrees of variation. For example, during summer thermal stratification there is high spatial heterogeneity in temperature, nutrients, dissolved oxygen and photosynthetically active radiation. The breakdown of stratification and subsequent mixing of the water column in fall greatly reduces the stability of the water column to a vertical gradient in light. Nutrients and biomass that were otherwise constrained to the depths are also suspended, leading to a boom in productivity.
520 $a Freshwater lakes are teeming with microbial diversity that responds to the dynamic environment in a seemingly predictable manner. Although such patterns have been well studied for nanoplanktonic phototrophic and heterotrophic populations, less work has been done to integrate the influence of mixotrophic nutrition to the protistan assemblage. Phagotrophy by phytoplankton increases the complexity of nutrient and energy flow due to their dual functioning as producers and consumers. The role of mixotrophs in freshwater planktonic communities also varies depending on the relative balance between taxon-specific utilization of carbon and energy sources that ranges widely between phototrophy and heterotrophy. Therefore, the role of mixotrophy in the microbial food web is difficult to predict because functional types of mixotrophs along a gradient of nutritional strategies contribute differently to nutrient cycling and carbon sequestration.
520 $a The overall objective of this work was to advance existing knowledge of the abundance and activity of phagotrophy phytoplankton in lacustrine systems. The incorporation of mixotrophy into the microbial food web requires the complement of physiological studies in culture (as described in chapter 2) and quantification of activity (including abundance and bacterivory) in relation to strict phototrophs and heterotrophs in situ (as described in chapter 3 and 4). Information on the physiological ecology of mixotrophic protists is crucial to understanding their role in planktonic food webs and influence on the dynamic microbial community structure in lake ecosystems. An understanding of the ecological functioning of lakes has ultimate consequences for management of water resources, particularly in the face of global climate change.
590 $a School code: 0225.
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Ecology. $3 516476
690 $a 0792
690 $a 0329
710 2 $a Temple University. $b Biology. $3 3181577
773 0 $t Dissertation Abstracts International $g 77-10B(E).
790 $a 0225
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10111316