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Autotrophic-heterotrophic coupling i...

Stets, Edward G.

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Autotrophic-heterotrophic coupling in lake ecosystems: The importance of organic carbon and food web interactions.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Autotrophic-heterotrophic coupling in lake ecosystems: The importance of organic carbon and food web interactions./
作者:	Stets, Edward G.
面頁冊數:	132 p.
附註:	Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 0751.
Contained By:	Dissertation Abstracts International68-02B.
標題:	Biology, Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3250165

Autotrophic-heterotrophic coupling in lake ecosystems: The importance of organic carbon and food web interactions.
Stets, Edward G.

Autotrophic-heterotrophic coupling in lake ecosystems: The importance of organic carbon and food web interactions. - 132 p.

Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 0751.

Thesis (Ph.D.)--University of Minnesota, 2007.

Net production in lakes depends upon the balance of autotrophic and heterotrophic processes. Bacterial metabolism is a major portion of total planktonic metabolism so factors influencing bacteria will affect total net productivity. In particular, the sources and supply rate of dissolved organic carbon have a major impact on bacterial metabolism and therefore overall ecosystem productivity. This dissertation focuses on dissolved organic carbon sources to lake ecosystems, heterotrophic response to DOC inputs and the potential influence of DOC on planktonic foodweb interactions. Dissolved organic carbon supply to lakes depends upon factors such as lake size, littoral zone area and phytoplankton production. Resident bacteria have a large capacity to respire excess organic carbon so DOC inputs directly stimulate heterotrophic metabolism. Additionally, DOC inputs can influence the outcome of nutrient competition between phytoplankton and bacteria and can further encourage heterotrophic dominance of lakes. Use of DOC by heterotrophic bacteria therefore provides a connection between physical properties and net production of lakes.Subjects--Topical Terms:

1017726
Biology, Ecology.

Autotrophic-heterotrophic coupling in lake ecosystems: The importance of organic carbon and food web interactions.
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520 $a Net production in lakes depends upon the balance of autotrophic and heterotrophic processes. Bacterial metabolism is a major portion of total planktonic metabolism so factors influencing bacteria will affect total net productivity. In particular, the sources and supply rate of dissolved organic carbon have a major impact on bacterial metabolism and therefore overall ecosystem productivity. This dissertation focuses on dissolved organic carbon sources to lake ecosystems, heterotrophic response to DOC inputs and the potential influence of DOC on planktonic foodweb interactions. Dissolved organic carbon supply to lakes depends upon factors such as lake size, littoral zone area and phytoplankton production. Resident bacteria have a large capacity to respire excess organic carbon so DOC inputs directly stimulate heterotrophic metabolism. Additionally, DOC inputs can influence the outcome of nutrient competition between phytoplankton and bacteria and can further encourage heterotrophic dominance of lakes. Use of DOC by heterotrophic bacteria therefore provides a connection between physical properties and net production of lakes.
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