کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4376196 1617493 2013 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Land-cover changes of biome transition zones in Loess Plateau of China
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Land-cover changes of biome transition zones in Loess Plateau of China
چکیده انگلیسی

The Holdridge life zone (HLZ) model has been improved to help classify the biome transition zone (BTZ) in China's Loess Plateau. A positive and negative transformation index of land-cover (PNTIL) was developed to quantitatively evaluate the land-cover changes in every type of BTZ. Three bioclimatic datasets, with a spatial resolution of 1 km × 1 km, were used to classify the BTZ type in Loess Plateau. These include the mean annual biotemperature (MAB), average total annual precipitation (TAP) and potential evapotranspiration ratio (PER). In 1985, 1995 and 2005 land cover data was used to analyze the changes within BTZs. The results show that there are 14 BTZ types, which account for 25.21% of the total land-cover area in Loess Plateau. From 1985 to 2005, cultivated land decreased 0.93% per decade; on average wetland and water areas, woodland and grassland increased 3.47%, 0.24% and 0.06% respectively per decade. During this period the total rate of whole BTZ land-cover transformation decreased from 28.53% to 21.91%. Overall the total positive and negative transformed areas of land cover in BTZs displayed a decreasing trend. Moreover, the results indicate that the transition zones may have exhibited a greater change and landscape diversity than the adjacent biomes in Loess Plateau from 1985 to 2005.


► We improved the Holdridge life zone model to classify the biome transition zones.
► There are 14 biome transition zone types within Loess Plateau.
► The transformed areas of land cover in transition zones have a decreasing trend.
► Transition zones may be changed more than the adjacent biomes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Modelling - Volume 252, 10 March 2013, Pages 129–140
نویسندگان
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