Knowledge Resource Center for Ecological Environment in Arid Area
| Understanding Environmental Change and Biodiversity in a Dryland Ecosystem through Quantification of Climate Variability and Land Modification: The Case of the Dhofar Cloud Forest, Oman | |
| [null] | |
| 出版年 | 2015 |
| 学位授予单位 | Galletti, Christopher Stephen (Author), Turner, Billie L (Advisor), Fall, Patricia L (Committee member), Myint, Soe W (Committee member), Arizona State University (Publisher) |
| 英文摘要 | abstract: The Dhofar Cloud Forest is one of the most diverse ecosystems on the Arabian Peninsula. As part of the South Arabian Cloud Forest that extends from southern Oman to Yemen, the cloud forest is an important center of endemism and provides valuable ecosystem services to those living in the region. There have been various claims made about the health of the cloud forest and its surrounding region, the most prominent of which are: 1) variability of the Indian Summer Monsoon threatens long-term vegetation health, and 2) human encroachment is causing deforestation and land degradation. This dissertation uses three independent studies to test these claims and bring new insight about the biodiversity of the cloud forest. Evidence is presented that shows that the vegetation dynamics of the cloud forest are resilient to most of the variability in the monsoon. Much of the biodiversity in the cloud forest is dominated by a few species with high abundance and a moderate number of species at low abundance. The characteristic tree species include Anogeissus dhofarica and Commiphora spp. These species tend to dominate the forested regions of the study area. Grasslands are dominated by species associated with overgrazing (Calotropis procera and Solanum incanum). Analysis from a land cover study conducted between 1988 and 2013 shows that deforestation has occurred to approximately 8% of the study area and decreased vegetation fractions are found throughout the region. Areas around the city of Salalah, located close to the cloud forest, show widespread degradation in the 21st century based on an NDVI time series analysis. It is concluded that humans are the primary driver of environmental change. Much of this change is tied to national policies and development priorities implemented after the Dhofar War in the 1970’s. Dissertation/Thesis Doctoral Dissertation Geography 2015 |
| 英文关键词 | Geography Remote sensing Environmental studies Cloud forest Dhofar Indian Summer Monsoon Land change science National policies Remote sensing |
| 语种 | 英语 |
| URL | http://hdl.handle.net/2286/R.I.35412 |
| 来源机构 | Arizona State University |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/249126 |
| 推荐引用方式 GB/T 7714 | [null]. Understanding Environmental Change and Biodiversity in a Dryland Ecosystem through Quantification of Climate Variability and Land Modification: The Case of the Dhofar Cloud Forest, Oman[D]. Galletti, Christopher Stephen (Author), Turner, Billie L (Advisor), Fall, Patricia L (Committee member), Myint, Soe W (Committee member), Arizona State University (Publisher),2015. |
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