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Digital Mapping and Spatial Analysis of Quarries Using GIS – A Case Study of Settat Province, Morocco

Nabil Aouichaty, Yahya Koulali, Yassine Bouslihim, Said Hilali

Ecological Engineering & Environmental Technology

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2021

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Vol. 22, iss. 1

83--91

EN

The province of Settat plays a key role in supplying the building materials that meet the needs of the province as well as the provincial construction and public work sectors. Indeed, the province is full of natural potential in raw materials and counts more than 109 quarries. This study aimed to build a quarrying database in the province of Settat to both characterize the materials mined and map the quarries through the Geographic Information System (GIS). This mapping allowed conducting the geographical distribution analysis of quarries by territorial unit and type of materials. The results revealed a predominance of carbonate quarries, especially in the Ben Ahmed circle. This distribution can be explained by natural, economic, and logistical factors characterizing the study area.

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Rapid expansion of the Asian clam Corbicula fluminea (O. F. Müller, 1774) : a new alien species in the mollusk community of the Vistula

Bonk M., Zając K., Lipińska A. M.

Oceanological and Hydrobiological Studies

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2018

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Vol. 47, No. 1

75--86

EN

A new large population of the Asian clam Corbicula fluminea (O. F. Müller, 1774) was found within a reach (ca 210 km long) of one of the largest European rivers, the Vistula. The largest population and the largest individuals were found at the outlet of a channel collecting heated water from the cooling process at the Połaniec power station and adjacent parts of the river. In the northern part of the study area, bivalves occurred at the channel margins, in groyne fields, and in the shallows of sand banks or sandbars. The clams were less numerous in places where the river was regulated with straightened banks and stone ripraps. Twenty-five other taxa of mollusks were found altogether at the sampling stations where Corbicula was observed, including other non-indigenous mollusk species.

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Chemotypes and geographic distribution of the Fusarium graminearum species complex

Przemieniecki S. W., Kurowski T. P., Korzekwa K.

Environmental Biotechnology

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2014

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Vol. 10, No. 2

45--59

EN

The Fusarium graminearum species complex (FGSC) consists of phylogenetically distinct pathogenic species. Isolates from various regions display genetic variety worldwide. Three type B trichothecene chemotypes have been identified within the FGSC: nivalenol, 3-deoxynivalenol and 15-deoxynivalenol. The variations in morphological, genetic and virulence traits of FGSC fungi can be attributed mainly to their geographic boundaries. The geographic range of host plants, type of farming system and weather conditions also influence the prevalence of FGSC taxa. The geographic distribution of FGSC members may reflect not only their chemotype but also adaptive traits. While 15-acetyl-deoxynivalenol (15-ADON) chemotype is prevalent in most of Europe, the 3-acetyl-deoxynivalenol (3-ADON) chemotype has achieved greater prevalence in parts of North America. The Asian species F. asiaticum has spread into new territories. Isolates of F. asiaticum have been identified in North America and Europe, and the species has recently been reported to be infecting cereal crops in South America. The occurrence of numerous members of the FGSC in those regions and the introduction of F. asiaticum into new areas raise significant food safety concerns and indicate the need for monitoring mycotoxin concentrations in harvested grain.