Titlebook: Vegetation dynamics in grasslans, heathlands and mediterranean ligneous formations; Symposium of the Wor P. Poissonet,F. Romane,W. Schmidt

推延

The spatial autocorrelation matrix, possesses remarkable properties. For any given variable (presence/absence, cover, quantitative measures of abundance) and random distribution of sampling points in space, this index tests the null hypothesis of absence of correlation for values recorded at two neighbouring points, using a non param

Cacophonous

The effect of fertilization and irrigation on the vegetation dynamics of a pine-heath ecosystem,ots pine (.) stand, subjected to experimental treatment. The treatments were: control (0), daily irrigation (I), fertilization once a year (F) and daily irrigation plus fertilization five days a week (IF). The cover of the total field layer of the 0-, I-, F- and IF-plots increased during the period

CRANK

Conservation of , heathland in the Belgian Ardennes, an experimental approach,s were conducted in the Hautes Fagnes region (Belgium). After the vegetation was mapped, plots were treated by mowing, burn-beating, and burning..The changing floristic composition was followed from 1972 to 1980 in permanent quadrats. Burn-beating is an excellent method of management for old heath,

盟军

Modelling ecological succession, with particular reference to Markovian models,Markovian models do appear to have predictive ability, and it is also considered that the patterns of probabilities in Markovian matrices may have a role to play in interpreting opposing views on the mechanisms of succession. Data from the Breckland grasslands (Watt, 1960b) are used as an example.

易改变

Towards the analysis of vegetation succession,processes and with the dynamic status of an area of lowland tropical rain forest. On the basis of these and other studies the conclusion is drawn that canonical analysis could contribute usefully in efforts to place the study of dynamic ecosystem processes on a more analytic footing.

CHYME

Development of flora, vegetation and grazing value in experimental plots of a , garrigue,types of results are obtained:.A method is suggested to calculate the grazing value and the corresponding sheep density, based on flora and vegetation knowledge. The results indicate that the stock can be multiplied by 3, at least, and by 7, at most, from the 3rd year after the beginning of the experiment.

联合

The spatial autocorrelation matrix,ling points in space, this index tests the null hypothesis of absence of correlation for values recorded at two neighbouring points, using a non parametric model for equiprobability of . ! attributions of . numerical values at . sampling points.

Astigmatism

homeostasis

An analysis of succession along an environmental gradient using data from a lawn,wever as accurate estimate of transition probabilities requires knowledge of the state of adjacent quadrats, i.e. individual observations of transition probabilities are not independent..Transition matrices are unlikely to be useful for predictive analysis of succession when spatial pattern is of significance in the community.

明智的人