کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
88561 159308 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reduced soil respiration in gaps in logged lowland dipterocarp forests
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Reduced soil respiration in gaps in logged lowland dipterocarp forests
چکیده انگلیسی

We studied the effects of forest composition and structure, and related biotic and abiotic factors on soil respiration rates in a tropical logged forest in Malaysian Borneo. Forest stands were classified into gap, pioneer, non-pioneer and mixed (pioneer, non-pioneer and unclassified trees) based on the species composition of trees >10 cm diameter breast height. Soil respiration rates did not differ significantly between non-gap sites (1290 ± 210 mg CO2 m−2 h−1) but were double those in gap sites (640 ± 130 mg CO2 m−2 h−1). Post hoc analyses found that an increase in soil temperature and a decrease in litterfall and fine root biomass explained 72% of the difference between gap and non-gap sites. The significant decrease of soil respiration rates in gaps, irrespective of day or night time, suggests that autotrophic respiration may be an important contributor to total soil respiration in logged forests. We conclude that biosphere-atmosphere carbon exchange models in tropical systems should incorporate gap frequency and that future research in tropical forest should emphasize the contribution of autotrophic respiration to total soil respiration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forest Ecology and Management - Volume 258, Issue 9, 10 October 2009, Pages 2007–2012
نویسندگان
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