Tree diversity patterns along the latitudinal gradient in the northwestern Russia
Posted on 2017-12-15 - 05:00
Abstract Background One of the key forest characteristics is the biodiversity, particularly the diversity of trees which are forest ecosystem engineers. Nowadays the most worldwide common approach for assessment of forest conditions and dynamics is based on the systematic monitoring, performed at a set of regularly structured plots. To fulfill the existing gap in this sort of knowledge on the Russian forests, an extensive study of tree species diversity on a regular network was conducted in north-west of Russia. Methods The study used the ICP Forests monitoring network that spans over 1700Â km along the western Russian border from forest-tundra in the north to broadleaved-coniferous forests in the south. Tree data were collected at 710 sites that were assigned along a regular grid. We performed series of statistical analyses of the tree species distribution and diversity in relation to environmental and anthropogenic factors. Results According to the Maxent species distribution modelling results only Pinus sylvestris, Betula sp. and Picea abies have the potential to grow throughout the study area. The locally maximum tree species diversity varies along the latitudinal gradient from 1 to 3 species in the north to 5â7 species in the south. Monocultural stands are relatively abundant across the study area, being especially common in the south taiga. The prevailing part of the monocultural stands is represented by Scots pine (72%). The age distribution of dominant trees has a clear connection with the intensity of forest use. We found that recent wildfire events had only little effect on tree diversity in the study area. Conclusions We demonstrated that ICP Forests monitoring network enables to successfully establish the main qualitative and quantitative relations of the spatial variation of tree species diversity to climatic, landscape, soil and anthropogenic factors. Analysis of the influence of these factors on tree species distribution allowed us to conclude that with the continuing trend of reducing the frequency and intensity of fires, Norway spruce will further replace Scots pine and Betula sp. in the north-western Russia. Extending the monitoring network, especially adding the time-series context, could provide novel appealing opportunities for forest dynamics projection and sustainable management.
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Tikhonova, Elena; Tikhonov, Gleb; Shevchenko, Nikolay; Knyazeva, Svetlana; Plotnikova, Alexandra; Lukina, Natalia; et al. (2017). Tree diversity patterns along the latitudinal gradient in the northwestern Russia. figshare. Collection. https://doi.org/10.6084/m9.figshare.c.3954934.v1
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AUTHORS (7)
ET
Elena Tikhonova
GT
Gleb Tikhonov
NS
Nikolay Shevchenko
SK
Svetlana Knyazeva
AP
Alexandra Plotnikova
NL
Natalia Lukina
MS
Maxim Shashkov