Assessing Bald Cypress (Taxodium Distichum) Tree Dynamic Change in USF Forest Preserve Area Using Mixture-tuned Matched Filtering and Multitemporal Satellite Imagery

Author: Yujia Wang

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Category: Baldcypress

Page: 63

View: 902

Wetlands are the most important and valuable ecosystems on Earth. They are called “kidneys of the Earth”. Vegetation change detection is necessary to understand the condition of a wetland and to support ecosystem sustainable management and utilization. It has been a great challenge to estimate vegetation (including bald cypress trees) coverage of the wetland because it is difficult to access directly. Satellite remote sensing technology can be one important feasible method to map and monitor changes of wetland forest vegetation and land cover over large areas. Remote sensing mapping techniques have been applied to detect and map vegetation changes in wetlands. To address spectral mixture issues associated with moderate resolution remote sensing images, many spectral mixture methods have been developed and applied to unmix the mixed pixels in order to accurately map endmembers (e.g., different land cover types and different materials within pixels) fractions or abundance. Of them, Mixture Tuned Matched Filtering (MTMF) is an advanced spectral unmixing method that has attracted many researchers to test it for mapping land cover types including mapping tree species with medium or coarse remote sensing image data. MTMF is a partial unmixing method that suppresses background noise and estimates the subpixel abundance of a single target material. In this study, to understand impacts of anthropogenic (e.g., urbanization) and natural forces/climate change on the bald cypress tree dynamic change, the bald cypress trees cover change in University of South Florida Forest Preserve Area was mapped and analysed by using MTMF tool and multitemporal Landsat imagery over 30 years from 1984 to 2015. To evaluate the MTMFs performance, a tradition spectral unmixing method, Linear Spectral Unmixing (LSU), was also tested. The experimental results indicate that (1) the bald cypress tree cover percentage in the study area has generally increased during the 30 years from 1984 to 2015, but over the time period from 1994 to 2005, the bald cypress tree cover percentage reduced; (2) MTMF tool outperformed the LSU method in mapping the change of the bald cypress trees over the 30 years to demonstrate its powerful capability; and (3) there potentially exists an impact of human activities on the change of the bald cypress trees although a further quantitative analysis is needed in the future research.

Plant Science Catalog

Botany Subject Index

Author: National Agricultural Library (U.S.)

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Category: Botany

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View: 579

Journal of the Arnold Arboretum

Author: Arnold Arboretum

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Category: Arboretum

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View: 514

Includes annual "Bibliography of the published writings of the staff and students..."

Howard Garrett's Plants for Texas

Author: Howard Garrett

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Category: Gardening

Page: 170

View: 216

Type of bloom and fruit; how propagated; habit and culture; recommended uses; problems; tips and notes. To help gardeners avoid costly mistakes, Garrett also specifically notes which plants grow very well or very poorly in Texas. In addition to the species descriptions (which are beautifully illustrated with color photos), the book includes reliable, easy-to-follow instructions for planting design, soil preparation, planting techniques, and plant maintenance. Garrett.

Bulletin

Author:

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Category: Agriculture

Page:

View: 357

Bonsai

Journal of the American Bonsai Society

Author:

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Category: Bonsai

Page:

View: 530