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The microbial ecology of a polluted,...

Fisher, Meredith Cope.

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The microbial ecology of a polluted, stratified lake: Methanotrophy, biodegradation, sulfate reduction, and methanogenesis.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The microbial ecology of a polluted, stratified lake: Methanotrophy, biodegradation, sulfate reduction, and methanogenesis./
Author:	Fisher, Meredith Cope.
Description:	192 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-05, Section: B, page: 2796.
Contained By:	Dissertation Abstracts International68-05B.
Subject:	Biology, Ecology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3264953
ISBN:	9780549035732

The microbial ecology of a polluted, stratified lake: Methanotrophy, biodegradation, sulfate reduction, and methanogenesis.
Fisher, Meredith Cope.

The microbial ecology of a polluted, stratified lake: Methanotrophy, biodegradation, sulfate reduction, and methanogenesis. - 192 p.

Source: Dissertation Abstracts International, Volume: 68-05, Section: B, page: 2796.

Thesis (Ph.D.)--Harvard University, 2007.

Permanently stratified bodies of water present a rare opportunity to examine the structure and function of native bacterial populations and their role in the distinct geochemical processes of these systems. Such sites maintain discreet layers: the epilimnion, hypolimnion, and metalimnion, and are characterized by steep physico-chemical gradients that create unique environments over sometimes surprisingly shallow depths. This thesis presents an in depth evaluation of the microbial communities in Lake Mishawum, a permanently stratified lake, that is significantly impacted by pollutants from nearby Superfund sites. The stratification of Lake Mishawum is due to inputs of saline and contaminated groundwater rich in methane and sulfate into the hypolimnion and inputs of freshwater from an inflowing stream into the epilimnion.

ISBN: 9780549035732Subjects--Topical Terms:

1017726
Biology, Ecology.

The microbial ecology of a polluted, stratified lake: Methanotrophy, biodegradation, sulfate reduction, and methanogenesis.
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020 $a 9780549035732
035 $a (UMI)AAI3264953
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100 1 $a Fisher, Meredith Cope. $3 1285758
245 1 4 $a The microbial ecology of a polluted, stratified lake: Methanotrophy, biodegradation, sulfate reduction, and methanogenesis.
300 $a 192 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-05, Section: B, page: 2796.
502 $a Thesis (Ph.D.)--Harvard University, 2007.
520 $a Permanently stratified bodies of water present a rare opportunity to examine the structure and function of native bacterial populations and their role in the distinct geochemical processes of these systems. Such sites maintain discreet layers: the epilimnion, hypolimnion, and metalimnion, and are characterized by steep physico-chemical gradients that create unique environments over sometimes surprisingly shallow depths. This thesis presents an in depth evaluation of the microbial communities in Lake Mishawum, a permanently stratified lake, that is significantly impacted by pollutants from nearby Superfund sites. The stratification of Lake Mishawum is due to inputs of saline and contaminated groundwater rich in methane and sulfate into the hypolimnion and inputs of freshwater from an inflowing stream into the epilimnion.
520 $a Linkages of aerobic and anaerobic biogeochemical processes to specific bacterial populations enable the integration of microbial ecology with environmental analyses and data. This work demonstrates that principle for a range of microbially-mediated processes in Lake Mishawum with a specific focus on aerobic methanotrophy and the biodegradation of aromatic contaminants as well as anaerobic sulfate reduction and methanogenesis. This was accomplished by evaluation of the community composition, abundance, and activity of microbial populations using quantitative and qualitative approaches and by coupling these data with physical and chemical measurements of the lake. In addition, it introduces combined measures for bacterial number and activity and reports the development of specific approaches to quantify these vast but unseen communities. The findings suggest the interface between the oxic and anoxic layers is the center of aerobic microbial activity, particularly for methanotrophy and the degradation of aromatic pollutants, and that the resident bacteria comprise active and dynamic populations in the metalimnion that vary with season and environmental condition. Though less dynamic, the hypolimnion is characterized by high cell numbers and evidence of signature anaerobic microorganisms including sulfate reducing bacteria and methanogenic archaea that benefit from the unique character of this layer. Taken in sum, these results serve to create a comprehensive evaluation of the number and function of microbial communities in Lake Mishawum which could serve in future biogeochemical modeling as well as the design of remediative strategies for polluted ecosystems.
590 $a School code: 0084.
650 4 $a Biology, Ecology. $3 1017726
650 4 $a Biology, Limnology. $3 1018638
650 4 $a Biology, Microbiology. $3 1017734
650 4 $a Biology, Molecular. $3 1017719
650 4 $a Environmental Sciences. $3 676987
690 $a 0307
690 $a 0329
690 $a 0410
690 $a 0768
690 $a 0793
710 2 $a Harvard University. $3 528741
773 0 $t Dissertation Abstracts International $g 68-05B.
790 $a 0084
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3264953