Résultat de la recherche
17 recherche sur le mot-clé
'Spatial pattern' 
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I. Badenhausser | 1994Spatial patterns of leaf-curling plum aphid, Brachycaudus helichrysi, aggregates and alate colonization of sunflower fields were studied over several years. Monte Carlo test procedures, based on indices of aggregation and spatial autocorrelation[...]article/chapitre/communication
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J. Perry | 1998SADIE (Spatial Analysis by Distance Indices) is a new methodology to detect and measure the degree of nonrandomness in the two-dimensional spatial patterns of populations. It applies the same principles to data in the form of maps as to data in [...]article/chapitre/communication
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F. Dessaint ; J. Caussanel | 1994article/chapitre/communication
B. Muller ; M. Reymond ; F. Tardieu | 2001Spatial and temporal analyses of elongation and cell length of monocotyledon leaves have most often been performed during the period when leaves are visible and elongate at a constant rate (steady-state), In the present study, the focus was on t[...]article/chapitre/communication
I. Badenhausser | 1989article/chapitre/communication
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R. Assuncao | 1994In this paper, a test is derived for the hypothesis of complete spatial randomness. Consider events occurring as points in a planar region. A sample of n locations is selected and the two nearest events to each of the sample points are found. Th[...]article/chapitre/communication
R. Engeman ; R. Sugihara | 1998An extensive simulation study was conducted to optimize the number, r, of population members to be encountered from each random starting point in variable area transect (VAT) sampling. The quality of estimation provided by the original calculati[...]article/chapitre/communication
J. Perry ; W. Parker ; L. Alderson ; S. Korie ; J. Bloodsmyth ; R. Mckinlay ; S. Ellis | 1998Populations of the mealy cabbage aphid, Brevicoryne brassicae (L.), on Brussels sprout plants, Brassica oleracea (L.) were sampled, fortnightly throughout the early season of 1996 in 2 ha(2) blocks. Sampling was done on two spatial scales, first[...]article/chapitre/communication
D. Allard ; A. Brix ; J. Chadoeuf | 2001Dependencies between two types of points in a spatial point process can be due either to a real dependence between the two types or to the dependence on common underlying variables. We propose a global test for dependence between two point proce[...]
