Influence of breeding habitat characteristics and landscape heterogeneity on anuran species richness and abundance in urban parks of Shanghai, China

2018 ◽  
Vol 32 ◽  
pp. 56-63 ◽  
Author(s):  
Ben Li ◽  
Wei Zhang ◽  
Xiaoxiao Shu ◽  
Enle Pei ◽  
Xiao Yuan ◽  
...  
Keyword(s):  
Species Richness ◽  
Landscape Heterogeneity ◽  
Urban Parks ◽  
Breeding Habitat ◽  
Habitat Characteristics ◽  
Anuran Species ◽  
Species Richness And Abundance

scholarly journals Transformation of upland meadow’s biogeocenosis during processes of overgrowth by the gray alder (Alnus inсаnа (L.) Moench)

2016 ◽  
Author(s):  
Tatiana Guzova ◽  
Marina Tikhodeyeva
Keyword(s):  
Species Richness ◽  
Environmental Factors ◽  
Vegetation Type ◽  
Habitat Characteristics ◽  
Soil Horizons ◽  
Herbaceous Vegetation ◽  
Indigenous Tree Species ◽  
Area Unit ◽  
Species Richness And Abundance ◽  
Vegetation Species

The article presents results of a study of the environmental conditions transformation during the formation of new phytocenoses by the grey alder. Processes of overgrowing meadows by alder entail a change of habitat characteristics, in particular, reduction of brightness and temperature, a significant increase in litter thickness. In addition, abundance and biomass of earthworms per area unit is reduced in upper soil horizons under the alders, compared to the meadow. Conversion of environmental factors significantly affects the development of herbaceous vegetation: species richness and abundance (cover) of herbaceous vegetation plummets under the influence of alder, as well as floristic heterogeneity of the cover. Undergrowth of spruce — indigenous tree species does not develop in the 60-year-old alder. Overgrowing meadows through the gray alder (compared with aspen and birch) inhibits the passage of autogenous succession, aimed at establishing indigenous vegetation type — spruce. Refs 29. Figs 5. Tables 3.

Consequences of organic farming and landscape heterogeneity for species richness and abundance of farmland birds

Oecologia ◽  
2010 ◽  
Vol 162 (4) ◽  
pp. 1071-1079 ◽  
Author(s):  
Henrik G. Smith ◽  
Juliana Dänhardt ◽  
Åke Lindström ◽  
Maj Rundlöf
Keyword(s):  
Species Richness ◽  
Organic Farming ◽  
Landscape Heterogeneity ◽  
Farmland Birds ◽  
Species Richness And Abundance

scholarly journals Salinity and freshwater discharge determine rotifer distribution at the Mossoró River Estuary (Semiarid Region of Brazil)

2010 ◽  
Vol 70 (3) ◽  
pp. 551-557 ◽  
Author(s):  
AMA. Medeiros ◽  
JEL. Barbosa ◽  
PR. Medeiros ◽  
RM. Rocha ◽  
LF. Silva
Keyword(s):  
Species Richness ◽  
Rainy Season ◽  
Salinity Gradient ◽  
River Estuary ◽  
Positive Influence ◽  
Freshwater Discharge ◽  
The Other ◽  
Semiarid Region ◽  
Inverse Estuary ◽  
Species Richness And Abundance

The present study aimed at evaluating differences in rotifer distribution in three estuarine zones in an inverse estuary located in the Semiarid Region of Brazil. Zones were chosen based on their proximity to the ocean and river border as a means of reflecting a horizontal salinity gradient. High freshwater discharge during the rainy season was the major determinant of rotifer composition. On the other hand, due to higher salinity values during the dry season, very low values of species richness and abundance were observed in all zones. Therefore, the study highlights the constraints of salinity and the positive influence of seasonality and river proximity on rotifer species in a semiarid estuarine environment.

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