Results 261 to 270 of about 2,448,084 (296)
Niche position drives interspecific variation in occupancy and abundance in a highly-connected lake system [PDF]
Ecological Indicators, 2019 We examined how niche position, niche breadth, biological traits and taxonomic relatedness affect interspecific variation in occupancy and abundance of two commonly-used biological indicator groups, i.e. diatoms and macroinvertebrates.
Annika Vilmi +2 more
exaly +2 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Market positioning: the shifting effects of niche overlap
Industrial and Corporate Change, 2012Organizational ecology models of market dynamics emphasize the competition-inducing role of inter-organizational niche overlap—targeting similar market niches increases competitive pressure and thus reduces organizations’ fitness. Recent studies, however, have suggested that moderate niche overlap may positively influence organizational viability by ...
Bruggeman, J. +4 more
openaire +6 more sources
Niches evolving the positioning of a mechanical arm in a 3D environment
Proceedings 5th Brazilian Symposium on Neural Networks (Cat. No.98EX209), 2002This paper presents an extension of the traditional genetic algorithms, called cooperative coevolutionary genetic algorithms (CCGA), which is used to evolve the angles of joints of a mechanical arm with N degrees of freedom in a 3D environment. Initially a brief introduction to this new approach will be presented.
Paulo Martins Engel +1 more
openaire +1 more source
Effects of range and niche position on
AbstractThe center‐periphery hypothesis predicts a decline in population performance toward the periphery of a species' range, reflecting an alteration of environmental conditions at range periphery. However, the rare demographic tests of this hypothesis failed to disentangle the role of geography from that of ecological niche and are biased toward ...
Jacob K. Moutouama, Orou G. Gaoue
openaire +2 more sources
Positioning Strategy for Credit Unions: Know Thy Niche
Services Marketing Quarterly, 1991The purpose of this paper is to examine the environment in which credit unions function and how they may position themselves in the tumultuous financial world of the 1990s. Credit unions should not try to be faithful to the old “full service" theme. Instead, they should offer specialized services to a narrow market.
Sandra Schmidt, Kathleen Debevec
openaire +1 more source
American Journal of Sociology, 1995
This paper aims to explain a major barrier to societal integration: the remarkable homogeneity of voluntary associations. The explanation derives from an ecological theory of voluntary affiliation that asserts that organizations compete for members in a property space defined by the sociodemographic characteristics of members.
Pamela A. Popielarz, J. Miller McPherson
openaire +1 more source
This paper aims to explain a major barrier to societal integration: the remarkable homogeneity of voluntary associations. The explanation derives from an ecological theory of voluntary affiliation that asserts that organizations compete for members in a property space defined by the sociodemographic characteristics of members.
Pamela A. Popielarz, J. Miller McPherson
openaire +1 more source
Latitudinal gradients in niche breadth and position—regional patterns in freshwater fish
Die Naturwissenschaften, 2006The latitudinal gradient in diversity is widely acknowledged, but the mechanisms contributing to this pattern are still poorly known. Given that the species have environmental optima, a central issue is how species' niche parameters, i.e. niche breadth and niche position, vary along the latitudinal gradient.
Janne Soininen
exaly +3 more sources
Niche position accounts for the positive occupancy–abundance relationship of lake fishes
Journal of BiogeographyAbstractAimIf the positive occupancy–abundance relationship prevails, locally abundant species are widely distributed. Although broadly supported, studies on lake fishes have thus far contributed little to this topic, especially at intermediate and small spatial scales.
Zhijun Xia +4 more
openaire +1 more source
Proceedings of the Royal Society B: Biological Sciences, 2018 Niche expansion is attained by adaptations in two generalized phenotypical traits - niche position and niche width. This gives room for a wide range of conceptual ways of niche filling.
Jörgen Ripa +2 more
exaly +3 more sources
Niche Position and Opportunities for Woody Biomass Conversion
2012For centuries, humans used plant biomass as food and heat, but use of biomass for fuel and chemicals was largely displaced by fossil sources after the commercial utilization of coal, and more recently petroleum and natural gas. Fossil sources have certain advantages over biomass in terms of energy density, shipping, and storage.
Thomas E. Amidon +4 more
openaire +1 more source