کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4393589 1305492 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparison of methods to assess long-term changes in Sonoran Desert vegetation
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
A comparison of methods to assess long-term changes in Sonoran Desert vegetation
چکیده انگلیسی

Knowledge about the condition of vegetation cover and composition is critical for assessing the structure and function of ecosystems. To effectively quantify the impacts of a rapidly changing environment, methods to track long-term trends of vegetation must be precise, repeatable, and time- and cost-efficient. Measuring vegetation cover and composition in arid and semiarid regions is especially challenging because vegetation is typically sparse, discontinuous, and individual plants are widely spaced. To meet the goal of long-term vegetation monitoring in the Sonoran Desert and other arid and semiarid regions, we determined how estimates of plant species, total vegetation, and soil cover obtained using a widely-implemented monitoring protocol compared to a more time- and resource-intensive plant census. We also assessed how well this protocol tracked changes in cover through 82 years compared to the plant census. Results from the monitoring protocol were comparable to those from the plant census, despite low and variable plant species cover. Importantly, this monitoring protocol could be used as a rapid, “off-the shelf” tool for assessing land degradation (or desertification) in arid and semiarid ecosystems.


► Assessments of long-term changes in vegetation cover and composition are essential.
► We compare a widely-implemented vegetation monitoring protocol to a resource-intensive plant census.
► Results from the monitoring protocol were comparable to the plant census over 82 years.
► The monitoring protocol may be an effective tool for assessing land degradation in arid regions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Arid Environments - Volume 75, Issue 11, November 2011, Pages 1228–1231
نویسندگان
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