scholarly journals Canonical correspondence analysis of relationship between characteristics of phytoplankton community and environmental factors in Wolong Lake

2021 ◽  
Vol 621 ◽  
pp. 012107
Author(s):  
Shanshan Ma ◽  
Xingchen Lv ◽  
Shicong Geng ◽  
Guofeng Wang ◽  
Shuo Yang ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Phytoplankton Community

scholarly journals Oligochaete (Annelida, Clitellata) сommunities in lakes of the Ural Mountains (Russia)

Zoosymposia ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 77-94 ◽  
Author(s):  
MARIA BATURINA ◽  
TARMO TIMM ◽  
OLGA LOSKUTOVA
Keyword(s):  
Environmental Factors ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Species Abundance ◽  
Species Level ◽  
The Other ◽  
Ural Mountains ◽  
Factors Influencing ◽  
The Relationship

The oligochaete fauna of 25 lakes located in the Polar and Subpolar regions of the Ural Mountains in Russia was studied. In total, 46 oligochaete taxa were collected, 32 of them identified to species level. Naididae had the highest number of taxa (19); the other taxa belonged to Pristinidae (2), Enchytraeidae (6), Tubificidae (10), Lumbriculidae (8) and Lumbricidae (1). Canonical correspondence analysis (CCA) was used to characterize the relationship between abundance of oligochaete species, abundance and biomass of all oligochaetes, abundance of separate families and environmental factors. Latitude, elevation, silt, detritus, moss and algal periphyton and depth were found to be factors influencing the distribution of oligochaetes.

scholarly journals Autumn ichthyoplankton assemblage in the Yangtze Estuary shaped by environmental factors

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1922 ◽  
Author(s):  
Hui Zhang ◽  
Weiwei Xian ◽  
Shude Liu
Keyword(s):  
Environmental Factors ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Environmental Changes ◽  
Yangtze Estuary ◽  
Environmental Data ◽  
The Yangtze Estuary ◽  
Annual Variations ◽  
Trichiurus Lepturus ◽  
Seawater Salinity

This study investigated the response of the ichthyoplankton community to environmental changes in the Yangtze Estuary using canonical correspondence analysis. Ichthyoplankton community and environmental data were recorded during the autumns of 1998, 2000, 2002, 2003, 2004, 2007 and 2009. Among the ichthyoplankton, the dominant larval and juvenile families were the Engraulidae, Gobiidae and Salangidae, and the most common eggs were fromTrichiurus lepturus. The ichthyoplankton was identified via canonical correspondence analysis to three assemblages: an estuary assemblage dominated byChaeturichthys stigmatias, a coastal assemblage dominated byEngraulis japonicusandStolephorus commersonii, and an offshore assemblage dominated byTrichiurus lepturus. Regarding environmental factors in the Yangtze Estuary, suspended matter and surface seawater salinity were the main factors influencing the distributions of the different assemblages, while sediment from the Yangtze River during the rainy season and chlorophyllawere the principle drivers of the annual variances in the distribution of ichthyoplankton assemblages. Our aims in this study were to provide detailed characterizations of the ichthyoplankton assemblage in the autumns of seven years, examine the long-term dynamics of autumn ichthyoplankton assemblages, and evaluate the influence of environmental factors on the spatial distribution and inter-annual variations of ichthyoplankton assemblages associated with the Yangtze Estuary.

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

scholarly journals Are Bacterio- and Phytoplankton Community Compositions Related in Lakes Differing in Their Cyanobacteria Contribution and Physico-Chemical Properties?

Genes ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 855
Author(s):  
Mikołaj Kokociński ◽  
Dariusz Dziga ◽  
Adam Antosiak ◽  
Janne Soininen
Keyword(s):  
Environmental Factors ◽  
Community Composition ◽  
Phytoplankton Community ◽  
Heterotrophic Bacteria ◽  
Bacterial Community Composition ◽  
Physical Factors ◽  
Research Attention ◽  
Phytoplankton Community Composition ◽  
The Impact ◽  
Bacteria Communities

Bacterioplankton community composition has become the center of research attention in recent years. Bacteria associated with toxic cyanobacteria blooms have attracted considerable interest. However, little is known about the environmental factors driving the bacteria community, including the impact of invasive cyanobacteria. Therefore, our aim has been to determine the relationships between heterotrophic bacteria and phytoplankton community composition across 24 Polish lakes with different contributions of cyanobacteria including the invasive species Raphidiopsis raciborskii. This analysis revealed that cyanobacteria were present in 16 lakes, while R. raciborskii occurred in 14 lakes. Our results show that bacteria communities differed between lakes dominated by cyanobacteria and lakes with minor contributions of cyanobacteria but did not differ between lakes with R. raciborskii and other lakes. Physical factors, including water and Secchi depth, were the major drivers of bacteria and phytoplankton community composition. However, in lakes dominated by cyanobacteria, bacterial community composition was also influenced by biotic factors such as the amount of R. raciborskii, chlorophyll-a and total phytoplankton biomass. Thus, our study provides novel evidence on the influence of environmental factors and R. raciborskii on lake bacteria communities.

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