کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9480808 | 1326777 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantification of vertical density variations of salt-marsh vegetation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Density and structure of salt-marsh canopies control the reduction of water flow by the vegetation, which may cause inter alia increased accretion. This paper presents and evaluates two methods that quantify the vertical density variations of salt-marsh canopies: the vertical biomass distribution and the lateral obstruction ratio obtained from a binarised picture. The former provides accurate results and is well adapted to define canopy heights; the second reflects the flow hindrance better, but is unsuitable for dense canopies. Both methods are used to illustrate density variation over short distances in Spartina marshes and to monitor two English salt-marshes over one year. The results demonstrate the great seasonal variability in the vegetation, which must be taken into account when long-term predictions are extrapolated from short-term measurements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 63, Issue 4, June 2005, Pages 489-496
Journal: Estuarine, Coastal and Shelf Science - Volume 63, Issue 4, June 2005, Pages 489-496
نویسندگان
Urs Neumeier,