کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6544167 159222 2013 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decreases in standing tree-based carbon stocks associated with repeated prescribed fires in a temperate mixed-species eucalypt forest
ترجمه فارسی عنوان
کاهش ذخایر کربن مبتنی بر درخت در ارتباط با آتش سوزی تکرار شده در یک جنگل اکالیپتوس گونه های معتدل مخلوط
کلمات کلیدی
آتش اعلام شده، سوختگی برنامه ریزی شده جنگل اوکالیپتوس، کربن، رشد درخت، مرگ و میر درخت،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
Total standing tree-based carbon stocks (live and dead) were significantly less in prescribed fire than control treatments. However, the mean carbon difference (25 Mg ha−1) had a wide 95% confidence interval (2-48 Mg ha−1), indicating a high degree of uncertainty about the magnitude of prescribed fire effects in these native forests. Overall decreases were consistent with detection of both direct and indirect effects of prescribed fire treatments. Direct combustion effects on bark were minimal (c. 0.2-0.4 Mg ha−1), but were also indicated by significantly less carbon in dead large stems in fire than control treatments despite evidence of marginally increased mortality of individual large stems in the former. Indirect effects of repeated prescribed fires were also detected as significantly decreased mean annual diameter increment of individual large Eucalyptus obliqua over 27 years (particularly of stems 20-50 cm diameter). With respect to prescribed fire type, small live stem densities and associated carbon stocks were greater in autumn than spring, and in Low than High frequency treatments, and carbon stocks in large dead stems were greater in High than Low frequency treatments. This suggested that c. 10-yearly fires in autumn provided the most scope for maintaining future capacity to fix carbon. Nonetheless, decreases in total standing tree-based carbon stocks were not significantly different among prescribed fire treatments, suggesting tree-based carbon stocks were more influenced by prescribed fire per se than by fire season or frequency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forest Ecology and Management - Volume 306, 15 October 2013, Pages 243-255
نویسندگان
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