Wetland communities are shaped by high levels of stress, disturbance and competition. Using South African palmiet wetlands as a case study (Prionium serratum dominated valley-bottom wetlands), we explore whether autogenic or allogenic succession is the dominant process driving community dynamics in drylands. Several wetland rehabilitation programmes Africa use species (P. serratum) pioneer to f...

Asymptotic properties of robust regression estimators are well known. However, it is not always clear what the best strategy for confidence intervals and hypothesis testing when sample size very large, since distribution residuals coming from estimates has unknown small samples. In present work we propose an analysis various strategies estimating variance-covariance matrix S at variation n p, c...

The global sea ice-ocean model ORCA2-LIM is used to investigate the impact of the thermal and mechanical forcing associated with the Southern Annular Mode (SAM) on the Antarctic sea ice-ocean system. The model is driven by idealized forcings based on regressions between the wind stress and the air temperature at one hand and the SAM index the other hand. The wind-stress component strongly affec...

the two-spotted spider mite, tetranychus urticae koch (acari: tetranychidae), is an economically important pest of ornamental plant in iran. the population abundance and spatial distribution were studied on five rosa cultivars including maroussia, wendela, elderado, wenedetta, and hot lady during two growing seasons of 2011 and 2012 in greenhouse. the k parameter, index of dispersion, lloyd’s m...

Recently Galashin, Grinberg, and Liu introduced the refined dual stable Grothendieck polynomials, which are symmetric functions in $x=(x_1,x_2,\dots)$ with additional parameters $t=(t_1,t_2,\dots)$. The polynomials defined as a generating function for reverse plane partitions of given shape. They interpolate between Schur by Lam Pylyavskyy 2007. Flagged more version where lower upper bounds ent...

In this study we simultaneously manipulated the patchiness of complex organic resources and the composition of microfaunal populations (protozoa and nematodes) in soil, to influence microbial mineralization processes and to elucidate the underlying mechanisms of nutrient acquisition from decomposing plant residues by ryegrass plants. Hotspot treatments of decreasing patchiness were established ...