Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/53802
Title: ADAPTATION OF MICROBIAL COMMUNITIES AND THEIR FUNCTIONS TO ENVIRONMENTAL PRESSURES IN AN URBAN WATERWAYS SYSTEM
Authors: GOURVENDU SAXENA
Keywords: Urban waterways, Sediment , Water, Microbial communities, Structure and functions, Metagenomics
Issue Date: 24-Jan-2014
Source: GOURVENDU SAXENA (2014-01-24). ADAPTATION OF MICROBIAL COMMUNITIES AND THEIR FUNCTIONS TO ENVIRONMENTAL PRESSURES IN AN URBAN WATERWAYS SYSTEM. ScholarBank@NUS Repository.
Abstract: Network of stormwater canals are critical to meet the growing demands of water resources in megacities. Microbial communities in urban waterways, with their self-cleaning capacities can play a major role in fulfilling the growing demand for clean water. This PhD project was designed to understand the associations of microbial community structure and functions to the local environmental factors in well-managed urban waterways. Here we show how land-use impacts the structure and function of urban aquatic microbial communities. Ecogenomics revealed differential impacts of residential and industrial land-use on the sedimentary and suspended microbial communities. While, most of the tested contaminants were below their allowable limits, soft metals appeared to be the key drivers of the structure and functional potential of these microbial communities. Rain perturbation, which appeared to influence the structure of microbial communities in site specific manner, also initiated successional response. Despite the differences, taxa and functional succession after rain were conserved in the different land-use types. Microbial communities with conserved successional trends in both, taxa structure and functions can be useful in developing waterways management practices with optimization of few environmental parameters. Such practices will enhance the ecological services from resident microbial communities and thereby self-water-purification capacity of the urban canal networks using.
URI: http://scholarbank.nus.edu.sg/handle/10635/53802
Appears in Collections:Ph.D Theses (Open)

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