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Spatial patterns in Texas lotic fish...

Lane, Michael S.

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Spatial patterns in Texas lotic fish communities.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Spatial patterns in Texas lotic fish communities./
作者:	Lane, Michael S.
面頁冊數:	61 p.
附註:	Source: Masters Abstracts International, Volume: 55-05.
Contained By:	Masters Abstracts International55-05(E).
標題:	Aquatic sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10133500
ISBN:	9781339920757

Spatial patterns in Texas lotic fish communities.
Lane, Michael S.

Spatial patterns in Texas lotic fish communities. - 61 p.

Source: Masters Abstracts International, Volume: 55-05.

Thesis (M.S.)--University of Houston-Clear Lake, 2016.

Spatial patterns in Texas lotic fish communities have been influenced and restructured by anthropogenic modification. These modifications and pursuant changes are well documented in the literature. The need for a statewide (and national) assessment to evaluate the status of freshwater streams using fish communities and their habitats was most recently addressed by the EPA National Rivers and Streams Assessment (NRSA). During the summers of 2013 and 2014, the Environmental Institute of Houston (EIH) used a probabilistic sampling design to survey various reaches of rivers and streams across Texas, sampling fish at nearly all sites through electrofishing. Utilizing GIS software (ArcMap), a watershed analysis was conducted relative to these sites. The relationship between major river basins, land use/land cover type and fish communities was examined. Fish communities exhibited distinct patterns with regards to richness and diversity gradients across Texas, however the number of sample sites in some basins was insufficient to conduct an analysis of factors affecting fish communities within these watersheds. Land use patterns across the major basins were reflected by delineated watersheds relatively well, with some bias associated with specific watersheds. Relationships between fish communities and land use/land cover did provide significant evidence (P < 0.05) that diversity was lower in drainages with higher agricultural and developed land use, but higher in drainages with more forested land. Broad scale spatial analysis of Texas lotic fish communities indicated that land use was as much as 33.9% correlated with fish community structure. The data further suggests that other variables such as physical habitat, water quality, and flow should be incorporated into future analyses in order to better predict variability in fish community structure not captured by land use/land cover data. Additionally, expanding the number of sample sites in some basins and including additional sampling gear (such as seines) would improve the ability to accurately assess fish community structure in future surveys.

ISBN: 9781339920757Subjects--Topical Terms:

3174300
Aquatic sciences.

Spatial patterns in Texas lotic fish communities.
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