کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5538158 1552012 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tree diversity across different tropical agricultural land use types
ترجمه فارسی عنوان
تنوع درختان در انواع مختلف گونه های مختلف کشاورزی استوایی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی


- Perenial Areas with perennial crops had higher species richness of wood plants than grazing land or areas with annual crops.
- Among the perennial crops were more woody species associated with coffee than Eucalyptus or khat (a stimulant crop)
- The cover of Eucalyptus and khat is increasing and can erode country side biodiversity if that result in a decrease in coffee.
- Many tree species were found in the annual crop but the density is very low.
- More species richness was found in the plots high density of coffee plants compared to plots with khats (Catha edulis), a stimulant shrub.

A recent trend in conservation biology is not only to focus on protected areas of natural vegetation but also on the management of agricultural landscapes, since these landscapes are considered to be of vital importance for overall landscape biodiversity − both through the opportunity for species to thrive there and as conduits for inter-patch dispersal. Since trees are considered to be key structures to enhance biodiversity in agricultural landscapes, we need to understand what factors regulate their occurrences. Farmers choices will decide the composition of land-uses and the associated densities and composition of trees. We compared tree density and tree species composition across eight different land use types replicated in ten agricultural landscapes in relatively humid climates of mid-altitudes (1500-2500 m asl) in Ethiopia. In each landscape five transects of 1 km divided into 50 plots of 20 × 20 m were surveyed for woody plants. Annual crop plots had a low tree density (of trees >10 cm DBH) (6 per ha), but since it generally was the most abundant land use type altogether, many tree species were still found there (4-29 per transect in the different landscapes). Most tree species had their highest relative occurrence in the perenial crops land-use type and among the different perenial crop types, plots with coffee were more species rich than plots with khat (Catha edulis) (a stimulant crop increasing in frequency); plots with Eucalyptus trees were intermediate. A few species were more associated with grazing areas and homegardens indicating that a combination of land-uses enhances the overall species diversity in these agricultural landscapes. However, if the trend of increasing areas of khat and Eucalyptus would lead to decreases in shade coffee there is a risk for severe erosion of tree density and species richness across these landscapes with cascading effects on associated biodiversity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agriculture, Ecosystems & Environment - Volume 240, 1 March 2017, Pages 92-100
نویسندگان
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