کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
9951699 1421190 2018 26 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Does insect induced defoliation affect anatomical structure of oak wood?
ترجمه فارسی عنوان
آیا اختلال القا شده حشره بر ساختار آناتومی چوب چوب بلوط تاثیر می گذارد؟
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
سفارش ترجمه تخصصی
با تضمین قیمت و کیفیت
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
چکیده انگلیسی
We counted the intra-annual density fluctuations (IADFs) of oak (Quercus robur) tree rings sampled in a deciduous broadleaf forest near Kozelsk (Kaluga region) in the Ugra National Park, Central Russia. Three sites in the same forest massif were sampled. We also sampled ash (Fraxinus excelsior) trees in one of these sites as a non-host species for the identification of insect outbreaks. In total, 49 oak and 21 ash trees were sampled and analyses were performed for the period 1878-2015. Within the selected time framework, we observed numerous cases with: 1) high percentage of IADFs, 2) decreased oak tree ring widths compared to that of ashes, 3) considerable quantity of oak trees with abrupt growth changes (AGC), and 4) statistically significant differences in counts of IADFs and AGC between the three sampling sites. These traits were characteristic for several consecutive years, and we interpret these as evidence of the insect herbivory causing growth interruptions during the period of the oak leaf expansion. Other external stress factors including summer droughts and late spring frosts can intensify IADFs manifestations during insect outbreaks, but did not affect oak growth strongly enough to cause growth interruptions without insect interference.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dendrochronologia - Volume 51, October 2018, Pages 66-75
نویسندگان
, ,
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
سفارش ترجمه تخصصی
با تضمین قیمت و کیفیت