Results 161 to 170 of about 486,429 (206)

Succession: Similarities of Species Turnover Rates

Science, 1973
The rate coefficients for species turnover (the proportion of species lost per unit time) for successional communities decrease as the communities approach some equilibrium state. This observation makes it possible to determine the parameters of a two-parameter model which quantifies the time variation of successional changes in the second derivative.
H H, Shugart, J M, Hett
openaire   +2 more sources

Species richness and species turnover in a successional heathland

Applied Vegetation Science, 2001
Abstract. Changes in species richness and species turnover during secondary succession following experimental disturbance were studied in eight permanent plots in a species‐rich dry heathland in the southern part of the Czech Republic. The treatments applied were sod‐cutting, burning, cutting of above‐ground biomass, and control.
Milan Chytrý, Iva Sedláková, Lubomír Tichý   +2 more
openaire   +1 more source

Temporal species turnover in amphibian and reptile species assemblages

2022
Es ist gut dokumentiert, dass Ölpalmplantagen durch einen deutlich geringeren Artenreichtum gekennzeichnet sind und eine deutlich differenzierte Artenzusammensetzung aufweisen als tropische Regenwälder. Über die zeitliche Dynamik oder Stabilität von Artengemeinschaften in Ölpalmplantagen, im Vergleich zu Wäldern, ist jedoch sehr wenig bekannt.
openaire   +1 more source

Species Dynamics During Early Secondary Forest Succession: Recruitment, Mortality and Species Turnover

Biotropica, 2007
ABSTRACTThe “Initial Floristic Composition” hypothesis is applied to secondary tropical rain forest succession in abandoned agricultural fields with light previous land‐use and close to seed sources. This hypothesis predicts that both pioneer and shade‐tolerant species colonize a site directly after abandonment, and as the canopy closes, the ...
van Breugel, M., Bongers, F.J.J.M., Martínez-Ramos, M.   +2 more
openaire   +2 more sources

Are there latitudinal gradients in species turnover?

Global Ecology and Biogeography, 2003
ABSTRACTAim  To examine the effect on the observed relationship between spatial turnover and latitude of both the measure of beta diversity used and the method of analysis.Location  The empirical analyses presented herein are for the New World.Methods  We take the spatial distributions of the owls of the New World as an exemplar data set to investigate
Koleff, P, Lennon, JJ, Gaston, KJ
openaire   +1 more source

Species turnover in deciduous forest vegetation

Vegetatio, 1978
Permanent quadrats were marked out in two areas of hardwood forest vegetation in 1969, and listings of their vascular plant species were taken on several occasions over the snow-free seasons of 1969, 1970, 1971 and 1976. Over the period of study, mean numbers of species per m2 remained virtually constant, but variations in the species compositions of ...
openaire   +1 more source

Species Turnover Rates on Islands: Dependence on Census Interval

Science, 1977
Measurements of species turnover in island bird communities demonstrate two trends with increasing census interval t : (i) Apparent turnover rates T decrease greatly with t , and (ii) the coefficient of variation of T decreases asymptotically to
J M, Diamond, R M, May
openaire   +2 more sources

Plant Traits and Species Turnover

1991
Density. Individuals of many species multiply their shoots every year. In the first period of their life shoots grow close to one another, and are as a rule tall and covered with a large number of leaves. Increased shoot densities, and the resultant shading of the polycormonal areas impede the production of renewal buds, and thereby restrict the ...
openaire   +1 more source

Evolution: Morphological complexity fuels rapid species turnover

Current Biology
Some animal lineages, such as mammals or trilobites, show particularly high rates of evolution - that is, of species origination and extinction. What makes such lineages special is not clear. A new study shows that, in fossil ammonoid cephalopods, more complex shell ornaments are associated with higher evolutionary rates.
openaire   +2 more sources