Groundwater in Egypt plays an important role in the country＇s water budget. South Western desert represent an arid of desert biome within world＇s net-work of the biosphere reserves. In this study, the plant wild veg...Groundwater in Egypt plays an important role in the country＇s water budget. South Western desert represent an arid of desert biome within world＇s net-work of the biosphere reserves. In this study, the plant wild vegetation were surveyed in Abu Tartur mining area located in the Southern part of Western depending essentially on the seepage from water line tubes which supplies water demands at Abu Tartur. The vegetation-environment relationships in Abu Tartur are described. Data sets （42 species in 38 plots） beside the pip-line enriched from 13 wells were analyzed, using multivariate procedures, i.e., two-way indicator species analysis （TW1NSPAN）, detrended correspondence analysis （DCA） and detrended canonical correspondence analysis （CCA）, to produce a classification of plant communities in the studied areas and to examine the relationships of that plant communities to certain edaphic factors. Five plant communities were identified. Astragalus vogelii, Chenopodium murale, Citrullus colocynthis, Fagonia arabica, Farsetia aegyptia, Hyoscyamus muticus, Morettia philaeana, Cynodon dactylon, Trichodesma africana, Tarnarix nilotica, Senna italica, Schouwia purpurea, Salsola volkensii and Phragmites australis were common in the study area. Phytochemical survey for nitroprpionic compounds in some taxa belonging to Fabaceae family showed the absence of these toxic compounds by using GC/MS analysis. Also some phytochemical components ofAstragalus vogalii were extracted and identified by GC/MS spectra. A biological activity, in this regard was the screening of methanol extracts for some wild taxa of Abu Tartur against natural Tetranychus urticae as acricidal activity and the methanol extracts of some taxa give high mortality results, like Farsetia aegyptia （86.6%） and Fagonia arabica Burm. f. （70.0%）.展开更多
The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipela...The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipelago represents the ongoing ecological and biological processes in the evolution and development of Asia＇s characteristic marine and insular ecosystems, both tropical and subtropic. The nominated property is a high biodiversity center with 3,860 species of plants and animals on islands and in the sea, of which 130 species are recorded on the Red Lists of Nationally and Internationally Threatened Species, and 76 species on the IUCN Red List of Globally Threatened Species. The iconic Cat Ba white-headed langur （Trachypithecus poliocephalus） is an endemic species indigenous to Cat Ba Archipelago where at present one population of 63 individuals only survives but nowhere else in the world. The Cat Ba white-headed langur is recognized as a critically endangered species facing an extremely high risk of extinction in the wild, thus needing urgent protection. The existence of another 20 endemic species in Cat Ba Archipelago shows that the process of evolution are on-going here, as new species continue to emerge in this unique archipelagic habitat.展开更多
文摘Groundwater in Egypt plays an important role in the country＇s water budget. South Western desert represent an arid of desert biome within world＇s net-work of the biosphere reserves. In this study, the plant wild vegetation were surveyed in Abu Tartur mining area located in the Southern part of Western depending essentially on the seepage from water line tubes which supplies water demands at Abu Tartur. The vegetation-environment relationships in Abu Tartur are described. Data sets （42 species in 38 plots） beside the pip-line enriched from 13 wells were analyzed, using multivariate procedures, i.e., two-way indicator species analysis （TW1NSPAN）, detrended correspondence analysis （DCA） and detrended canonical correspondence analysis （CCA）, to produce a classification of plant communities in the studied areas and to examine the relationships of that plant communities to certain edaphic factors. Five plant communities were identified. Astragalus vogelii, Chenopodium murale, Citrullus colocynthis, Fagonia arabica, Farsetia aegyptia, Hyoscyamus muticus, Morettia philaeana, Cynodon dactylon, Trichodesma africana, Tarnarix nilotica, Senna italica, Schouwia purpurea, Salsola volkensii and Phragmites australis were common in the study area. Phytochemical survey for nitroprpionic compounds in some taxa belonging to Fabaceae family showed the absence of these toxic compounds by using GC/MS analysis. Also some phytochemical components ofAstragalus vogalii were extracted and identified by GC/MS spectra. A biological activity, in this regard was the screening of methanol extracts for some wild taxa of Abu Tartur against natural Tetranychus urticae as acricidal activity and the methanol extracts of some taxa give high mortality results, like Farsetia aegyptia （86.6%） and Fagonia arabica Burm. f. （70.0%）.
文摘The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipelago represents the ongoing ecological and biological processes in the evolution and development of Asia＇s characteristic marine and insular ecosystems, both tropical and subtropic. The nominated property is a high biodiversity center with 3,860 species of plants and animals on islands and in the sea, of which 130 species are recorded on the Red Lists of Nationally and Internationally Threatened Species, and 76 species on the IUCN Red List of Globally Threatened Species. The iconic Cat Ba white-headed langur （Trachypithecus poliocephalus） is an endemic species indigenous to Cat Ba Archipelago where at present one population of 63 individuals only survives but nowhere else in the world. The Cat Ba white-headed langur is recognized as a critically endangered species facing an extremely high risk of extinction in the wild, thus needing urgent protection. The existence of another 20 endemic species in Cat Ba Archipelago shows that the process of evolution are on-going here, as new species continue to emerge in this unique archipelagic habitat.
