Species Diversity and Community Organization in Desert Seed-Eating Ants

Ecology ◽  
1977 ◽  
Vol 58 (4) ◽  
pp. 711-724 ◽  
Author(s):  
Diane W. Davidson
Keyword(s):  
Species Diversity ◽  
Community Organization ◽  
Seed Eating

scholarly journals Phytosociological studies on natural establishment of vegetation in an unreclaimed limestone mining

2003 ◽  
Vol 46 (2) ◽  
pp. 259-269 ◽  
Author(s):  
Rita de Cássia Frenedozo-Soave
Keyword(s):  
Species Diversity ◽  
Plant Diversity ◽  
Environmental Conditions ◽  
Community Organization ◽  
Diversity Indices ◽  
Sao Paulo ◽  
Vegetation Community ◽  
Floristic Similarity ◽  
Number Of Species ◽  
Natural Establishment

Phytosociological structure was studied in limestone mining quarries at Rio Claro, São Paulo, Brazil. Quarries presented a chronosequence, ranging 1 to 40 years old, with focus on vegetation community organization, floristic similarity and plant diversity of three areas in different successive stages, devastated by limestone mining. A total of 1957 individuals distributed in 32 botanical families and 91 species were sampled. Low species diversity was obtained, ranged among quarries ages. In the early-established quarries, Leguminosae, Malvaceae and Sterculiaceae were the families most representative in number of species, while for the age 27, Asteraceae and Poaceae were the most representative. Diversity indices indicated that species diversity changed with the time and was function of environmental conditions.

Comparison of Niche-Packing and Community Organization in Desert Rodents in Asia and North-America

1994 ◽  
Vol 42 (4) ◽  
pp. 479 ◽  
Author(s):  
GI Shenbrot ◽  
KA Rogovin ◽  
EJ Heske
Keyword(s):  
Species Diversity ◽  
North American ◽  
Chihuahuan Desert ◽  
Community Organization ◽  
Alpha Diversity ◽  
Mean Annual Precipitation ◽  
Spatial Organisation ◽  
Feeding Modes ◽  
Desert Rodents ◽  
Desert Rodent

We compared patterns of species diversity, locomotory morphology, feeding modes, and spatial organisation for rodent communities in four Asian deserts (Kyzylkum, Gobi, ?Thar, Negev) and one North American (Chihuahuan) desert. Deserts were similar in gamma and alpha diversity. A positive relationship between regional species diversity (and biomass) and mean annual precipitation was found. The Asian deserts showed a greater degree of divergence and specialisation between bipedal and quadrupedal forms. The range of feeding modes was similar in deserts on both continents, but the Negev was the only Asian desert in which granivory was as important as in the Chihuahuan. Temperate Asian desert rodents were organised into spatial guilds, separated primarily by characteristics of the soil and perennial vegetation. North American desert rodent species overlapped more extensively in habitat use. The similarities and differences between these deserts can be explained by their biogeographic histories.

Community Organization Curriculum Development

1967 ◽  
Author(s):  
Arnulf M. Pins ◽  
Arnold Gurin ◽  
Wyatt C. Jones ◽  
Joan Levin ◽  
Robert Perlmam
Keyword(s):  
Curriculum Development ◽  
Community Organization

Diatoms in the Early Valdai (Weichselian) sediments in Lake Ladoga basin

2019 ◽  
pp. 225-228
Author(s):  
Anna V. Ludikova
Keyword(s):  
Species Diversity ◽  
High Energy ◽  
Lake Ladoga ◽  
Diatom Assemblages ◽  
Marine Diatoms ◽  
Selective Preservation

The pioneer diatom study of the Early Weichselian (Valdai) sediments in Lake Ladoga basin was performed. The specifics of the diatom assemblages (co-occurrence of ecologically incompatible taxa, poor species diversity, low diatom concentration and selective preservation) suggest that during the Early Weichselian time intense erosion of previously deposited marine Eemian (Mikulino) sediments prevailed, which resulted in re-deposition of marine diatoms. The sedimentation took place in high-energy environments unfavorable for diatom accumulation and preservation.

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