Patterns of Species Distribution in Britain Elucidated by Canonical Correspondence Analysis

1991 ◽  
Vol 18 (3) ◽  
pp. 247 ◽  
Author(s):  
M. O. Hill
Keyword(s):  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Species Distribution

Multivariate analysis of the effects of edaphic and topographical factors on plant distribution in the Yilong Lake Basin of Yun-Gui Plateau, China

2009 ◽  
Vol 89 (1) ◽  
pp. 211-221 ◽  
Author(s):  
B. S. Cui ◽  
H. J. Zhai ◽  
S. K. Dong ◽  
B. Chen ◽  
S. L. Liu
Keyword(s):  
Environmental Factors ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Species Distribution ◽  
Native Species ◽  
Plant Distribution ◽  
Slope Aspect ◽  
Lake Basin ◽  
Shrub Species ◽  
Herb Species

The relationships between environmental factors (soil and topography) and plant (shrub and herb) distribution on different hillside habitats in the Yilong Lake basin, southwest China, are examined. Surveys of 31 shrub sites and 31 herb sites, as well as seven edaphic and four topographic factors, on the northern and southern slopes around the Yilong Lake were performed monthly in October and November, 2004, and in November and December, 2005. Two-way indicator species analysis (TWINSPAN) was used to classify the plant communities, showing that the shrub community types on the northern and southern slopes were different, in contrast with the herb communities. Canonical correspondence analysis was conducted to clarify the relationships between vegetation and environmental factors in order to interpret the distribution of the communities and compare the relative importance among the environmental factors to the vegetation. The results showed that: (1) the combined effects of topography and soil explained 30.3% of the variability of shrub species distribution and 28.4% of the variability of herb species distribution; (2) the single effects of soil and topography explained 23.8 and 23.5% of shrub species distribution and 22.1 and 17.6% of herb species distribution, respectively; (3) slope aspect was the most important factor influencing shrub and herb distribution; and (4) specific site characteristics have important implications for effective vegetation management strategies and restoration of native species communities. Key words: Canonical correspondence analysis, ecology, soil, topography, vegetation distribution

Environmental factors including management practices as correlates of weed community composition in spring seeded crops

1992 ◽  
Vol 70 (10) ◽  
pp. 1931-1939 ◽  
Author(s):  
M. R. T. Dale ◽  
A. G. Thomas ◽  
E. A. John
Keyword(s):  
Community Composition ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Environmental Variables ◽  
Management Practices ◽  
Geographic Region ◽  
Climatic Conditions ◽  
Weed Species ◽  
Weed Communities ◽  
Seed Crops

The relationship between the weed communities and environmental variables such as soil, crop, and management was investigated in two provinces of Canada. The frequencies of weed species were recorded in cereal and oilseed fields in Saskatchewan (2244 fields over 4 years) and Manitoba (864 fields over 3 years), Canada. Information on some of the physical characteristics of the fields and on the management practices imposed on them was also collected, in part by questionnaire. The two kinds of data were ordinated together using canonical correspondence analysis to assess the relationships between the species and the environmental variables. In the Saskatchewan data, there was a clear and consistent separation of the species into groups along an axis correlated with soil zone and the associated climatic gradient. In the Manitoba data, the same groups of species did not separate as clearly or as consistently, although geographic region was a major determinant of the weed communities. The greater variability may be due to the fact that the gradient of soil types is much more restricted in Manitoba and not as closely correlated with climatic conditions. In both provinces, culture practices were less important as correlates of the weed community composition than soil type or, to a certain extent, the previous crop. Key words: canonical correspondence analysis, cereal crops, oil seed crops.

scholarly journals Desmid algae (Charophyta: Conjugatophyceae) of Ekaterinburg, Middle Urals, Russia

2018 ◽  
Vol 55 ◽  
pp. 7-15
Author(s):  
Andrei S. Shakhmatov ◽  
Evgeniy V. Pavlovskiy ◽  
Alexander G. Paukov
Keyword(s):  
Species Composition ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Habitat Preferences ◽  
Water Bodies ◽  
Middle Urals ◽  
The Middle Urals

Species composition of desmid algae and their habitat preferences in water bodies of Ekaterinburg city were studied during the 2013–2017. Thirty-seven species and subspecific taxa which belong to 12 genera and 2 families were identified, of which 17 species are new for the eastern macroslope of the Middle Urals. Canonical correspondence analysis, which was performed to reveal habitat preferences, demonstrates that the majority of analyzed species prefer quarry lakes, ponds and overgrown lake shores, contrary to fens and rivers.

scholarly journals On the Use of Selected Ordination Techniques to Analyze the Parliamentary Election Results

2016 ◽  
Vol 3 (322) ◽  
Author(s):  
Małgorzata Misztal
Keyword(s):  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Redundancy Analysis ◽  
Social Research ◽  
Economic Research ◽  
Parliamentary Election ◽  
Ecological Research ◽  
Parliamentary Elections ◽  
Ordination Techniques ◽  
Election Results

Ordination techniques such as CCA (Canonical Correspondence Analysis) or RDA (Redundancy Analysis) are very popular in ecological research but almost completely unknown in, for example, socio-economic research. The goal of this paper is to concisely organize the concepts and terminology associated with ordination and to present the possibilities of its application in social research with an example of the analysis of the 2015 parliamentary elections results.

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