Evaluation of the disturbance of forest ecosystems and their recovery after wildfire events in the Olekminsky reserve (Russia) using interpretation of Landsat satellite images
https://doi.org/10.31242/2618-9712-2021-26-2-6
Abstract
For the purposes of monitoring the state of forest ecosystems, it is most effective to use the capabilities of remote sensing methods. Fragments of 27.562 km2 (scale 1: 16000) of Gmelin larch (Larix gmelinii Rupr.) with various disturbances caused by fire were identified on the Landsat ETM + multispectral satellite images of the Olekminsky State Nature Reserve. Then polygons were saved at three levels of detail-4, 16.64 with scales 1: 8000, 1: 4000, 1: 2000. When decrypting, an uncontrolled classification of a fragment and polygons was carried out using the ISODATA method (Iterative Self-Organizing Data Analysis Technigue) into 2.4 classes. Distribution curves of the values of forest cover and productivity indices were constructed for the polygons of the 3rd level of detail. The nature of the distribution curves of the values of disturbed polygons differ from the normal one, while in the undisturbed ones they are close to the normal distribution of the values. Calculation of the correlation coefficient between the series of values of the indices by year showed that at all three levels of detailing the correlation coefficient of an undisturbed polygon is 2–3 times higher than that of a disturbed one. According to the results of classification into 4 classes, statistic processing was carried out with the calculation of indicators of the difference and similarity of polygons the variance of the general population and the Fisher test (F-test). The results of changes in the variance of the general population and the F-test at different levels of detail are considered.
About the Authors
Yu. F. Rozhkov
State Nature Reserve «Olekminsky»
Russian Federation
Russian Federation
ROZHKOV Yurii Filippovich, Cand. Sci. (Chemistry), Deputy Director for Scientific Research
6 Filatova ul., Olekminsk 678100
M. Yu. Kondakova
Hydrochemical Institute
Russian Federation
Russian Federation
KONDAKOVA Maria Yuryevna, Cand. Sci. (Biology), Senior Researcher
1983 Stachki pr., Rostov-on-Don 344090
Researcher ID: Z-2288-2019; Scopus ID: 36499623700
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Review
For citations:
Rozhkov Yu.F., Kondakova M.Yu. Evaluation of the disturbance of forest ecosystems and their recovery after wildfire events in the Olekminsky reserve (Russia) using interpretation of Landsat satellite images. Arctic and Subarctic Natural Resources. 2021;26(2):94-107. (In Russ.) https://doi.org/10.31242/2618-9712-2021-26-2-6
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