Results 141 to 150 of about 43,983 (161)
Some of the next articles are maybe not open access.
Water Scarcity on the Abundance: Political Ecology Perspective
SSRN Electronic Journal, 2015The situation of relative water scarcity becomes a classic problem in developing countries. This issue is not about the absence of water, but rather about the inequality with regard to access to water. Scarcity of water is a part of daily life for some though the area of abundant water resources.
Kris Lulofs +2 more
openaire +2 more sources
The discovery of species–abundance distribution in an ecological community
Oikos, 2012Species–abundance distribution (SAD) is one of the most basic descriptions of an ecological community. Vigorous controversy surrounded SAD from the 1940s to 1960s, and has since persisted. Isao Motomura first published a notable paper in 1932 to describe findings on SAD, and to provide an empirical model; nevertheless, this work has often been ...
Terutaka Mori, Hideyuki Doi
openaire +2 more sources
Self and Agency in Context: Ecologies of Abundance and Scarcity
International Perspectives in Psychology, 2012This work considers sociocultural foundations of self and agency in material affordances associated with affluence and poverty. We first review work that links independent self-construal and disjoint agency to material abundance. We then report an experiment among students at North American ( n = 52) and West African ( n = 60) universities, in which ...
Glenn Adams +2 more
openaire +2 more sources
Exploitative competition and ecological effective abundance
Ecological Modelling, 1997Abstract This study analyzes the effect of exploitative competition and density dependence by using an individual-based simulation model. There are two components of exploitative competition (leftovers and resource-recovery competition). In leftovers competition, individuals compete for food resources that have been left by others.
openaire +2 more sources
1978
As we mentioned in Section 1.1. there can be little doubt that ecology was responsible for the development of the theory of diversity and that it is still the main field of application. Throughout this chapter, the classes C1,C2,…,C S refer to the various species of some taxonomic group of animals or plants.
openaire +2 more sources
As we mentioned in Section 1.1. there can be little doubt that ecology was responsible for the development of the theory of diversity and that it is still the main field of application. Throughout this chapter, the classes C1,C2,…,C S refer to the various species of some taxonomic group of animals or plants.
openaire +2 more sources
Abundance models in ecology—examples
1978A generating process In Chapter 2 we made some general assumptions concerning the distribution of X = (X1,X2,…,XS) stating that the probability generating function of X was $$ {{G}_{x}}\left( z \right) = {{M}_{v}}\left( {\Sigma {{p}_{i}}{{z}_{i}} - 1} \right), $$ where Mv( ) denotes some moment-generating function.
openaire +2 more sources
Ecological Interactions and the Distribution, Abundance, and Diversity of Sponges
2012Although abiotic factors may be important first-order filters dictating which sponge species can thrive at a particular site, ecological interactions can play substantial roles influencing distribution and abundance, and thus diversity. Ecological interactions can modify the influences of abiotic factors both by further constraining distribution and ...
openaire +3 more sources
Variations in cone photoreceptor abundance and the visual ecology of birds
Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology, 2001The relative abundance and topographical distribution of retinal cone photoreceptors was measured in 19 bird species to identify possible correlations between photoreceptor complement and visual ecology. In contrast to previous studies, all five types of cone photoreceptor were distinguished, using bright field and epifluorescent light microscopy, in ...
openaire +4 more sources
Abundance Inequality in Freshwater Communities Has an Ecological Origin
The American Naturalist, 2016The hollow-shaped species abundance distribution (SAD) and its allied rank abundance distribution (RAD)-showing that abundance is unevenly distributed among species-are some of the most studied patterns in ecology. To explain the nature of abundance inequality, I developed a novel framework identifying environmental favorability, which controls the ...
openaire +3 more sources
Latent Block Model for ecological abundance data
2015Latent Block Model for ecological abundance data. 30.
Aubert, Julie +3 more
openaire +6 more sources