Forest community analysis in the Songshan national nature reserve of China using self-organizing map

Suriguga,; Zhang, J. T.; Zhang, B.; Cheng, Jiajia; Zhang, Q. D.; Tian, Song; Liu, S. J.

doi:10.1134/s1067413611030179

Cited by 8 publications

(7 citation statements)

References 13 publications

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“…Therefore, it can be also considered as an environmental factor affecting vegetation structure and organisation (Suriguga et al . 2011), consistent with this present study (Fig. 3, Table 3).…”

Section: Discussionsupporting

confidence: 93%

“…Although litter thickness can be considered as a response variable in terms of its response to the species composition of a stand and the age of a stand, litter also supplies nutrients, moisture and a subclimate to the area (explanatory variable) (Blagoveshchenskii et al 2006). Therefore, it can be also considered as an environmental factor affecting vegetation structure and organisation (Suriguga et al 2011), consistent with this present study (Fig. 3, Table 3).…”

Section: Discussionsupporting

confidence: 81%

“…Slope aspect (clockwise from south), which is a circular variable, was expressed as cos (aspect) (Suriguga et al . 2011); a greater value indicates a sunnier and drier condition. All hillslopes were divided into three positions from top to bottom, and the upper, middle and bottom positions were recorded as 1, 2 and 3 respectively.…”

Section: Study Area and Methodsmentioning

confidence: 99%

“…We also recorded elevation (by GPS), slope and aspect (by compass), slope position (by eye), litter thickness (by a ruler) and soil depth using an iron probe in each quadrat. Slope aspect (clockwise from south), which is a circular variable, was expressed as cos (aspect) (Suriguga et al 2011); a greater value indicates a sunnier and drier condition. All hillslopes were divided into three positions from top to bottom, and the upper, middle and bottom positions were recorded as 1, 2 and 3 respectively.…”

Section: Data Collectionmentioning

confidence: 99%

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Separation of environmental effects on community variation of a larch forest in north China

Zhang

Yang

et al. 2018

Earth and Environmental Science Transactions of the Royal Socie

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Pangquangou National Nature Reserve is well known as ‘the distribution centre of Prince Rupprecht's larch (Larix principis-rupprechtii)' in China. Community variation in Prince Rupprecht's larch forest provides habitat heterogeneity for animals, especially for the endemic and endangered brown-eared pheasant (Crossoptlon mantchuricum). In this study a total of 120 quadrats (each 10×10m) were established to measure and record species composition and six environmental variables to examine the underlying variables that control community variation. We applied a multivariate regression tree analysis to detect community variation, and used redundancy analysis-based variation partitioning to separate the effects of environmental variables on community variation. The results show that Prince Rupprecht's larch forest in the Pangquangou National Nature Reserve can be represented by eight community types. The amount of total species variability captured by all environmental variables was 20.6%, and the cumulative percentage variance of species–environment relationships was 95.8%. However, analyses with a conditional effect approach revealed that elevation, aspect and litter thickness contribute the most to community variation. The pure and joint effects of these three explanatory variables were separated with variation partitioning analyses. The results highlight that the effect of elevation accounts for the largest fraction of community variation in Prince Rupprecht's larch forest.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 81%

Section: Study Area and Methodsmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

See 2 more Smart Citations

Separation of environmental effects on community variation of a larch forest in north China

Zhang

Yang

et al. 2018

Earth and Environmental Science Transactions of the Royal Socie

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“…The SOM method has previously been used in vegetation studies (e.g. Luyssaert et al 2004;Zhang & Yang 2008;Adamczyk 2011;Suriguga et al 2011;Adamczyk et al 2012), but it was applied to contemporary investigations. It has never before been used to analyse historical data obtained by the classical Braun-Blanquet method.…”

Section: Discussionmentioning

confidence: 99%

Application of a Kohonen's self‐organizing map for evaluation of long‐term changes in forest vegetation

Adamczyk

Kurzac

Park

et al. 2012

J Vegetation Science

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Question Can a Kohonen's self‐organizing map, which is robust to non‐linear relationships between variables and their non‐normal distributions, be effective in patterning the data on plant communities investigated with the classical Braun‐Blanquet phytosociological method based on the ordinal scale? Does the application of the self‐organizing map make it possible to obtain new information from the analysed plant communities when compared to the Braun–Blanquet method alone? Location The Babsk nature reserve, Central Poland. Methods The analysed data were derived from two separate series of phytosociological studies on plant communities dating from periods 31 yr apart (1960 and 1991). The data consisted of 24 quantitative sampling lists of plant species (=phytosociological releves). The releves were analysed by the application of a Kohonen's self‐organizing map and the indicator value (IndVal). Results The transformations from Querco roboris–Pinetum to Tilio cordatae–Carpinetum betuli in the vegetation in the Babsk nature reserve over 31 yr were determined precisely. Valuable new data were also obtained on: (1) significant associations of individual plant species with the previous and recent phytocoenoses, i.e. diagnostic groups of plant species for each phytocoenosis; (2) abiotic conditions (determined retrospectively in the two study periods on the basis of ecological indicators for vascular plants); and (3) the concordance of phytocoenoses with the biotope. Conclusions The Kohonen's self‐organizing map method and the IndVal made it possible to efficiently identify abiotic and biotic patterns for plant communities on the basis of the data expressed in the conventional Braun‐Blanquet scale.

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Spatial patterns of the main trees in a plant micro-reserve constructed in the 2022 Beijing Winter Olympics mountainous competition zone

Wang

Zhang

2023

J. Mt. Sci.

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Forest community analysis in the Songshan national nature reserve of China using self-organizing map

Cited by 8 publications

References 13 publications

Separation of environmental effects on community variation of a larch forest in north China

Separation of environmental effects on community variation of a larch forest in north China

Application of a Kohonen's self‐organizing map for evaluation of long‐term changes in forest vegetation

Spatial patterns of the main trees in a plant micro-reserve constructed in the 2022 Beijing Winter Olympics mountainous competition zone

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