Knowledge Resource Center for Ecological Environment in Arid Area
| Modeling Suitable Habitat Under Climate Change for Chaparral Shrub Communities in the Santa Monica Mountains National Recreation Area, California | |
| [null] | |
| 出版年 | 2014 |
| 学位授予单位 | James, Jennifer (Author), Franklin, Janet (Advisor), Rey, Sergio (Committee member), Wentz, Elizabeth (Committee member), Arizona State University (Publisher) |
| 英文摘要 | abstract: Species distribution modeling is used to study changes in biodiversity and species range shifts, two currently well-known manifestations of climate change. The focus of this study is to explore how distributions of suitable habitat might shift under climate change for shrub communities within the Santa Monica Mountains National Recreation Area (SMMNRA), through a comparison of community level to individual species level distribution modeling. Species level modeling is more commonly utilized, in part because community level modeling requires detailed community composition data that are not always available. However, community level modeling may better detect patterns in biodiversity. To examine the projected impact on suitable habitat in the study area, I used the MaxEnt modeling algorithm to create and evaluate species distribution models with presence only data for two future climate models at community and individual species levels. I contrasted the outcomes as a method to describe uncertainty in projected models. To derive a range of sensitivity outcomes I extracted probability frequency distributions for suitable habitat from raster grids for communities modeled directly as species groups and contrasted those with communities assembled from intersected individual species models. The intersected species models were more sensitive to climate change relative to the grouped community models. Suitable habitat in SMMNRA's bounds was projected to decline from about 30-90% for the intersected models and about 20-80% for the grouped models from its current state. Models generally captured floristic distinction between community types as drought tolerance. Overall the impact on drought tolerant communities, growing in hotter, drier habitat such as Coastal Sage Scrub, was predicted to be less than on communities growing in cooler, moister more interior habitat, such as some chaparral types. Of the two future climate change models, the wetter model projected less impact for most communities. These results help define risk exposure for communities and species in this conservation area and could be used by managers to focus vegetation monitoring tasks to detect early response to climate change. Increasingly hot and dry conditions could motivate opportunistic restoration projects for Coastal Sage Scrub, a threatened vegetation type in Southern California. Dissertation/Thesis M.A. Geography 2014 |
| 英文关键词 | Climate change Conservation biology Natural resource management California Chaparral Climate Change Coastal MaxEnt |
| 语种 | 英语 |
| URL | http://hdl.handle.net/2286/R.I.24761 |
| 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/2XILL650/248533 |
| 推荐引用方式 GB/T 7714 | [null]. Modeling Suitable Habitat Under Climate Change for Chaparral Shrub Communities in the Santa Monica Mountains National Recreation Area, California[D]. James, Jennifer (Author), Franklin, Janet (Advisor), Rey, Sergio (Committee member), Wentz, Elizabeth (Committee member), Arizona State University (Publisher),2014. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [[null]]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [[null]]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [[null]]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
