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Without a doubt, the CCA has allowed the characterization of insect assemblage responses to vegetation parameters. The comparison of certain composition between diverse stations of Sabkha Djendli using the Jaccard index displays lower similarity values, normally not exceeding 35%. This similarity would uncover its explanation while in the Substantial Comments Upon ARN-509   In Grade By Grade Order heterogeneity of ecological circumstances for this fauna, especially the composition and composition on the sparse vegetation which happens to be mainly made up of halophytes together with Suaeda spp. Atriplex spp. and Salicornia spp. (Neffar, Chenchouni & Si Bachir, in press), reflecting thus the degraded conditions prevailing on the physicochemical properties of soil in which they grow (Khaznadar, Vogiatzakis & Griffiths, 2009). According to Baguette (1992), the inter- and intra-specific competitions, predation and parasitism regulate the spatial and temporal distribution of species and framework of communities. Also, the distribution of a given species is a dynamic phenomenon that involves a set of extinction and recolonisation stages of local populations following changes in environmental ailments. Even more so, several studies have shown that changes in communities across habitats Illustrative Notices Upon RVX-208   In Bit By Bit Order are influenced by environmental variables, particularly the type of substrate (Ligeiro, Melo & Callisto, 2010) and even the coarse organic matter (Hepp & Melo, 2013). Furthermore, we speculate that the land use around each station has an important influence on the variation of insect abundance and composition in that station. The AHC grouped together N, SE, NE and E stations, and these are furthest to the urban area and cropping lands, while other groups of stations (S, SW, W, NW) are the closest from urban and In Depth Remarks For ARN-509   In Step By Step Order crop areas. Similarly, N and NW stations are clustered together because both are closest to montane forests and furthest from urban areas. The land use is an important factor that helps to identify spatiotemporal variation in insect communities (Schweiger et al., 2005). Human activities in general and the agricultural ones in particular, which include grazing and animal farming, may induce several changes to structural and organisational features of insect populations and communities (Rand, Tylianakis & Tscharntke, 2006). The spatial variability from the insect fauna of Sabkha Djendli is related to the combination of several factors, among others: the climate is critical to the distribution of arid arthropods (Langlands, Brenna & Pearson, 2006), the reproductive potential and dispersal capabilities (Thompson & Townsend, 2006), and environmental heterogeneity may be a contributing factor to their minimal dispersion.