Search Results

You are looking at 131 - 140 of 3,758 items for :

  • "community" x
  • All content x
Clear All

Biondini, M. E., C. D. Bonham and E. F. Redente. 1985. Secondary successional patterns in a sagebrush ( Artemisia tridentata ) community as they relate to soil disturbance and soil biological activity. Vegetatio 60: 25

Restricted access

218 Barbiero. D.C., I.M. Macedo. B.P. Masi and I.R. Zalmon. 2011. Comparative study of the estimated sample size for benthic intertidal species and communities. Lat. Am. J. Aquat. Res. 39

Restricted access

European Commission, 1992. Council Directive 92/43/EEC of May 1992 on the Conservation of Natural Habitats and of Wild Fauna and Flora . Commission of the European Communities, Brussels. http://ec.europa.eu/ (last access July 2008

Restricted access

. , Ticehurst , J. R. , Carroll , K. , Thomas , D. L. , Nuermberger , E. , Bartlett , J. G. : Severe community-onset pneumonia in healthy adults caused by methicillinresistant Staphylococcus aureus carrying the Panton-Valentine leukocidin genes. Clin

Restricted access
Acta Biologica Hungarica
Authors: Neda Haddadderafshi, Tímea Borbála Pósa, Gábor Péter, László Gáspár, Márta Ladányi, Károly Hrotkó, Noémi Lukács, and Krisztián Halász

. Lamit , L. J. , Lau , M. K. , Schultz , C. M. , Wooley , S. C. , Whitham , T. G. , Gehring , C. A. ( 2014 ) Tree genotype and genetically based growth traits structure twig endophyte communities . Am. J. Botany 11 , 464 – 478

Restricted access

The contribution of local (e.g., competition) and regional (e.g., dispersal) processes in the structure of communities remains an unresolved issue. In general, a tendency to assume local processes to be deterministic and regional to be stochastic dominates, although it is challenged. Fortunately, it can be cast as a testable proposition: if correct, the degree of determinism in the final community structure might indicate which process is more prominent in the control of community structure. However, recent findings have also suggested that stochastic patterns can arise from local processes and that dispersal can homogenize communities, which would make them appear deterministic irrespective of the mechanism involved. To evaluate these competing expectations we conducted an experiment where the initial communities had the same composition and species abundances. We hypothesized that if local processes dominate, then arrays of communities will show divergence of community structures whether connected by dispersal or not (i.e., being fully isolated). Alternatively, if regional processes dominate, the dispersal connected communities should converge while isolated ones should not. We found, however, that both groups of experimental communities showed similar patterns of change - a decline in similarity and a tendency to diverge. This suggests that biological interactions, demographic stochasticity, or both, exert noticeable control over community structure such that they reduce similarity among replicate communities and diversify their final states. We speculate that these mechanisms enhance potential for species additions, particularly in conjunction with factors such as dispersal and the size of the regional species pool.

Restricted access

management, so far little is known about the spatial and temporal variability of bacterial communities of reservoir lakes used for temporal storage of geothermal water. Therefore, the aim of this study was to gain insight into the seasonal changes of the

Restricted access
Scientometrics
Authors: Luka Kronegger, Franc Mali, Anuška Ferligoj, and Patrick Doreian

networks are for whole scientific communities within one specific small country. In addition to having smaller networks, they are bounded by national borders and organizational structure of science on the national level. Both raise the probability of

Restricted access

Linusson, A.C., G.A.I. Berlin and E.G.A. Olsson. 1998. Reduced community diversity in semi-natural meadows in southern Sweden, 1965–1990. Plant Ecol. 136:77–94. Olsson E.G.A. Reduced

Restricted access

Abstract  

The objective of this paper is to show that various bibliometric indicators are a good departure point to describe a national research community, as well as the linkages between research institutions, the users of the research and the funders of the research community. We profile the Canadian coal and petroleum research communities. The role of CANMET, a government research laboratory, is examined as example of how our analysis can be useful to policy-makers and decision-makers.

Restricted access