کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6299045 1617910 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Medium-term dynamics of tree species composition in response to silvicultural intervention intensities in a tropical rain forest
ترجمه فارسی عنوان
دینامیک متوسط ​​ترکیب ترکیبات درخت در پاسخ به تداوی مداخلات جنگلی در یک جنگل بارانی گرمسیری
کلمات کلیدی
آمازون برزیل، بازیابی جنگل، ورودی انتخابی، تنوع گونه ها، نازک شدن پایه، خوشه بندی محدود زمانی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
Managed forests are important landscape components in tropical regions and may contribute to biodiversity conservation. Yet, managing tropical forests sustainably requires an understanding of ecosystem responses to silvicultural interventions. We investigated how silvicultural intervention intensity affects tree species composition and diversity over 30 years in the Brazilian Amazon by comparing them to pre-logging conditions and to an unlogged control. The interventions comprised logging in 1982 and thinning in 1993-1994 and ranged in intensity from 19 to 53% reduction in the original basal area (BA). Trees with a diameter at breast height (DBH) ≥ 5 cm were measured on eight occasions in 41 permanent sample plots of 0.25 ha each. Silvicultural intervention intensity influenced both tree species composition and its trajectory within 30 years. In contrast, tree species diversity was not impaired. High intervention intensities (with BA reduction > 6.6 m2 ha− 1) had a substantial influence on the community of trees (DBH ≥ 10 cm), which did not show signs of return to pre-logging species composition. The reduction of BA through harvesting damage and thinning had a stronger effect on species composition than logging of mature trees itself. Thus, damage should be kept to a minimal level and strong thinning interventions should be avoided. This may enhance ecosystem recovery and maintenance of biodiversity at other trophic levels. Since current permitted harvesting intensities in the Brazilian Amazon are lower than the lowest intensity examined in our study, legal harvesting practices are unlikely to cause substantial, long-term changes in tree species composition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biological Conservation - Volume 191, November 2015, Pages 577-586
نویسندگان
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