کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4392733 1618227 2016 8 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of past and present land use on vegetation cover and regeneration in a tropical dryland forest
ترجمه فارسی عنوان
اثرات استفاده از گذشته و حال زمین در پوشش گیاهی و بازسازی در یک جنگل دیم گرمسیری
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کلمات کلیدی
گاو نر. تاریخچه روشن و برش پوشش گیاهی، مدیریت زمین، بیابان زایی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• Caatinga vegetation is negatively affected by both past and current land use.
• Current vegetation structure is negatively impacted by past clear-cut.
• Past forest clear-cut promotes current grazing intensity.
• Regeneration is negatively affected by current grazing and past clear-cut.
• Increasing time since the last clear-cut increased negative effects.

Brazilian Caatinga is one of the most diverse dryland ecosystem of the world and is threatened by strong land use pressure and poor protection. In this study, we investigate the effects of past and present land use on plant community richness and structure. We used satellite information to identify 55 Caatinga forest plots with and without past vegetation clearing. We also quantified current land use, i.e. grazing by domestic animals, and selective logging. Caatinga vegetation structure, measured as vegetation cover, vegetation height, basal area and woody plant density, as well as recruitment, measured as woody plant seedling density and species richness, were negatively affected by both past and current land use. Past clear-cut not only had strong effects on most vegetation measures, but also increased current grazing which further negatively affected vegetation structure. Selective logging had little measurable effects but increased recruitment in plots previously clear-cut. Increasing time since the last clear-cut increased negative effects on vegetation, presumably because of a prolonged negative effect of grazing. Our results suggest that grazing needs to be prevented in areas degraded by clear-cut to allow vegetation restoration through natural succession and avoid further degradation and desertification.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Arid Environments - Volume 132, September 2016, Pages 26–33
نویسندگان
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