کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4378041 | 1617532 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spatial autocorrelation in masting phenomena of Quercus serrata detected by multi-spectral imaging
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A significant correlation was found between logarithmic acorn yield and the multi-spectral data observed on June 6, 2003 (R2 = 0.37, p < 0.05) and on May 26, 2004 (R2 = 0.44, p < 0.01); these relationships were also confirmed by leave-one-out cross-validation (p < 0.05). Through an image segmentation procedure, approximately 5700 canopies were identified. The acorn yields of these canopies were estimated by applying the model developed. The correlation coefficients calculated from the estimated spatial distributions of yield decreased as distance increased. Our experimentally estimated spatial distribution agrees with the patterns of the correlograms of spatial pattern derived from Sakate and Iwasa's models. Combinations of our findings and their simulation results suggest that an endogenous mechanism may drive the masting of Q. serrata.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Modelling - Volume 215, Issues 1â3, 10 July 2008, Pages 217-224
Journal: Ecological Modelling - Volume 215, Issues 1â3, 10 July 2008, Pages 217-224
نویسندگان
Tetsuya Akita, Kenshi Sakai, Yuko Iwabuchi, Yoshinobu Hoshino, Xujun Ye,