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Competitive abilities and ecological...

University of Nevada, Las Vegas.

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Competitive abilities and ecological impacts of Tamarix aphylla in southern Nevada.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Competitive abilities and ecological impacts of Tamarix aphylla in southern Nevada./
Author:	Hayes, Willard E., II.
Description:	43 p.
Notes:	Adviser: Lawrence R. Walker.
Contained By:	Masters Abstracts International45-06.
Subject:	Biology, Botany. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1443762
ISBN:	9780549078845

Competitive abilities and ecological impacts of Tamarix aphylla in southern Nevada.
Hayes, Willard E., II.

Competitive abilities and ecological impacts of Tamarix aphylla in southern Nevada. - 43 p.

Adviser: Lawrence R. Walker.

Thesis (M.S.)--University of Nevada, Las Vegas, 2007.

Tamarix aphylla, an evergreen tree that hybridizes with the more widespread deciduous shrub T. ramosissima, has invaded the drawdown zone of Lake Mead in the southwestern U.S. To determine the ecological impacts and the invasive potential of T. aphylla, vegetative and soil characteristics of habitats dominated by either T. aphylla or T. ramosissima were measured, and competition experiments between T. aphylla and T. ramosissima , and between T. aphylla and the native Salix gooddingii were performed. Stands of both Tamarix species were similar in density and cover of vegetation, with each species tending to have higher density and cover values at one of the two sites measured. Tamarix aphylla plants were significantly taller than T. ramosissima, and tended to have larger basal diameters and canopies. Salinity was significantly higher in soils collected under the canopy of T. aphylla than in soils collected under T. ramosissima, whereas soil total Kjeldahl nitrogen, pH, and organic matter in soil varied between species by site. In the competition experiments, increases in T. aphylla density had a greater negative effect on relative growth rates of both T. aphylla and the native S. gooddingii when the two species were paired. However, T. ramosissima had a greater negative effect on the relative growth rate of both Tamarix species when the two species were paired. Because of the competitive abilities and ecological impacts of T. aphylla, action should be taken to ensure that this plant does not further invade riparian ecosystems in the southwestern U.S.

ISBN: 9780549078845Subjects--Topical Terms:

1017825
Biology, Botany.

Competitive abilities and ecological impacts of Tamarix aphylla in southern Nevada.
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020 $a 9780549078845
035 $a (UMI)AAI1443762
035 $a AAI1443762
040 $a UMI $c UMI
100 1 $a Hayes, Willard E., II. $3 1017866
245 1 0 $a Competitive abilities and ecological impacts of Tamarix aphylla in southern Nevada.
300 $a 43 p.
500 $a Adviser: Lawrence R. Walker.
500 $a Source: Masters Abstracts International, Volume: 45-06, page: 3039.
502 $a Thesis (M.S.)--University of Nevada, Las Vegas, 2007.
520 $a Tamarix aphylla, an evergreen tree that hybridizes with the more widespread deciduous shrub T. ramosissima, has invaded the drawdown zone of Lake Mead in the southwestern U.S. To determine the ecological impacts and the invasive potential of T. aphylla, vegetative and soil characteristics of habitats dominated by either T. aphylla or T. ramosissima were measured, and competition experiments between T. aphylla and T. ramosissima , and between T. aphylla and the native Salix gooddingii were performed. Stands of both Tamarix species were similar in density and cover of vegetation, with each species tending to have higher density and cover values at one of the two sites measured. Tamarix aphylla plants were significantly taller than T. ramosissima, and tended to have larger basal diameters and canopies. Salinity was significantly higher in soils collected under the canopy of T. aphylla than in soils collected under T. ramosissima, whereas soil total Kjeldahl nitrogen, pH, and organic matter in soil varied between species by site. In the competition experiments, increases in T. aphylla density had a greater negative effect on relative growth rates of both T. aphylla and the native S. gooddingii when the two species were paired. However, T. ramosissima had a greater negative effect on the relative growth rate of both Tamarix species when the two species were paired. Because of the competitive abilities and ecological impacts of T. aphylla, action should be taken to ensure that this plant does not further invade riparian ecosystems in the southwestern U.S.
590 $a School code: 0506.
650 4 $a Biology, Botany. $3 1017825
650 4 $a Biology, Ecology. $3 1017726
690 $a 0309
690 $a 0329
710 2 $a University of Nevada, Las Vegas. $3 1017627
773 0 $t Masters Abstracts International $g 45-06.
790 $a 0506
790 1 0 $a Walker, Lawrence R., $e advisor
791 $a M.S.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1443762