A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Landscape-level tanglehead dynamics and the effects on Northern bobwhite habitat
Tanglehead (Heteropogon contortus) is a perennial bunchgrass native to Texas and much of the Southwestern U.S. rangelands; however, large monotypic stands of tanglehead have emerged over the past decade in Jim Hogg, Duval, and Kleberg counties, simplifying native vegetative communities. The aim of this research was to understand the spatial and temporal dynamics of tanglehead invasions and assess the impact of tanglehead stands on northern bobwhite habitat by merging the gradient concept of landscape structure with the concept of slack. To accomplish these objectives, I combined remote sensing data with spatial analysis and landscape metrics to quantify the spatial and temporal distribution of tanglehead. I developed and combined surface metrics relevant to northern bobwhite winter habitat to quantify habitat suitability and potential changes because of tanglehead. Tanglehead increased across the study area from 7.1% (2008) to 17.8% (2014), with most of the tanglehead present in the landscape (> 50%) occurring within the first 150 m from the road. The habitat suitability models developed for this study indicated a change in areas of low suitability (+1.7%; SE = 1.1), medium suitability (+1%; SE = 0.3) and high suitability (-2.7%; SE = 1.3) with the inclusion of tanglehead cover.
Landscape-level tanglehead dynamics and the effects on Northern bobwhite habitat
Tanglehead (Heteropogon contortus) is a perennial bunchgrass native to Texas and much of the Southwestern U.S. rangelands; however, large monotypic stands of tanglehead have emerged over the past decade in Jim Hogg, Duval, and Kleberg counties, simplifying native vegetative communities. The aim of this research was to understand the spatial and temporal dynamics of tanglehead invasions and assess the impact of tanglehead stands on northern bobwhite habitat by merging the gradient concept of landscape structure with the concept of slack. To accomplish these objectives, I combined remote sensing data with spatial analysis and landscape metrics to quantify the spatial and temporal distribution of tanglehead. I developed and combined surface metrics relevant to northern bobwhite winter habitat to quantify habitat suitability and potential changes because of tanglehead. Tanglehead increased across the study area from 7.1% (2008) to 17.8% (2014), with most of the tanglehead present in the landscape (> 50%) occurring within the first 150 m from the road. The habitat suitability models developed for this study indicated a change in areas of low suitability (+1.7%; SE = 1.1), medium suitability (+1%; SE = 0.3) and high suitability (-2.7%; SE = 1.3) with the inclusion of tanglehead cover.
Landscape-level tanglehead dynamics and the effects on Northern bobwhite habitat
Mata, Jose Manuel (author)
2017-12-01
Miscellaneous
Electronic Resource
English
DDC:
710
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