О некоторых неопределённостях в оценке биологической продуктивности лесов в контексте биогеографии

Abstract

Дан анализ проблемы оценки биологической продуктивности лесов в современном освещении с позиций биогеографии, развитие регрессионных (аллометрических) моделей в связи с переходом на весовую таксацию деревьев. Показаны неопределённости, связанные с применением «всеобщих» аллометрических моделей биомассы и их аддитивностью.

The problems of assessing the biological productivity of forests in the modern lighting from the standpoint of biogeography, the development of the regression (allometric) models in connection with the transition to the weight mensuration of trees. Some uncertainties associated with the local use of "generic" allometric models and their additivity have been shown. As additivity of tree biomass equations requires statistical analysis and software beyond the ordinary least squares method, but does not give higher indicators of equation adequacy compared to traditional methods, some questions arise: 1) what advantages give additive equations compared to conventional ones in theoretical and applied aspects, 2) do they have greater statistical meaning, rather than providing the estimates consistency only, 3) do additive systems of equations calculated at the levels of tree and forest give more correct distribution of tree biomass, as well as stand biomass and NPP, according to the main transcontinental climatic gradients, compared with existing patterns obtained with conventional methods using traditional equations? If positive answers of these questions will be received, this will create preconditions for the development of regional systems of taxation standards in the volume and biomass indicators, compatible in their structure and a wide range of determinants, including climatic and ecological ones, and further - for geographically positioned speciesspecific mapping of biological productivity of Eurasian forests.