Re-vegetation plays a fundamental role for erosion control and plant recovery in lands affected by gully erosion. Bioengineered practices facilitate the gullies rehabilitation. Objectives of the research were: 1) Iden...Re-vegetation plays a fundamental role for erosion control and plant recovery in lands affected by gully erosion. Bioengineered practices facilitate the gullies rehabilitation. Objectives of the research were: 1) Identify taxonomically the pioneer vegetation on each gully section; 2) Characterize vegetation distribution preferences and 3) Assess structural/functional traits to recognize erosion control key species. Bioengineering was applied in a watershed belonging to Sierra Madre del Sur, at Oaxaca, Mexico, on eight gullies, with local support and minimal investment. "La Mixteca" is a poor ecological and socio-economic region, comparable to other regions of the world. The Initial Floristic Composition(IFC) inventory is the baseline of the successional process. The transect method was used to determine the colonization of species. Cover abundance of registered species was estimated using the semi-quantitative scale of Braun-Blanquet. This procedure was repeated in five different positions(floor, hillslopes and tops), in the cross section of the gully. Throughcorrespondence analysis and clustering, the distribution of species was analyzed. Adequate responses were obtained in soil retention(quantity) and plant cover(existence and diversity); as measurable indicators of the bioengeneering works efficiency. Occupation of soil by native species from the Tropical Deciduous Forest was favored using live barriers. We detected species guilds with spatial distribution preferences in the gullies cross section. Plant cover characterization includes: native colonizer species, herbaceous, shrubby and trees of the forest community bordering the gully area, with cover abundance and structural/functional traits, useful to protect degraded areas. This spatial occupation process of plants responds to a secondary succession in gullies, where the proposed IFC model is correctly represented through bioengineering. Natural establishment of plants was successful by traits of species such as extensive root system and sexual/vegetative reproduction.展开更多
In Western culture, the symbol of the tree which divides into branches and has a foliage of the same lineage as its roots is the best symbol for describing identity and also for describing the Cartesian reasoning whic...In Western culture, the symbol of the tree which divides into branches and has a foliage of the same lineage as its roots is the best symbol for describing identity and also for describing the Cartesian reasoning which proceeds by eliminating misconceptions and following thesingle true idea. In the West Indies culture, it is the rhizome that is the best symbol to describe the identity of these peoples. The rhizome as explained by Deleuze and Gattari in their Introduction Rhizome of the book .4 thousand plateaus, is a tuber that makes roots after being cut off from its original plant. In this respect, it is most appropriate to describe the people of the Caribbean who have been cut off from their African roots by slavery but who have thrived on the island, re-establishing links with the different peoples who came to work there. The rhizome is similar to the mangrove that protects the island from marine erosion, it intertwines with other plants so that it is impossible to distinguish the source plant. In this respect, it is the best symbol to describe the creole identity and the refusal of the West Indians to return to a racial and social system that promulgated the white race as superior to the black race during colonialism. The structure of the books of Maryse Cond6 is itself rhizomatic since it does not present the theme of its stories through the view point of an omnipotent author but through the view points of all the characters of the novel who by their discussions letthe reader discover their terrible history of slavery, and transform himinto a new man who would seek diversity.展开更多
The local plant resources adapted to the desert harsh geomorphologicl environment are a landmark that characterizes the Saharan region： erg, dunes, and wadis. This work emphasizes on some results obtained through a s...The local plant resources adapted to the desert harsh geomorphologicl environment are a landmark that characterizes the Saharan region： erg, dunes, and wadis. This work emphasizes on some results obtained through a study conducted in 2011, based on surveys and field observations in the Tidikelt oases （in Salah, wilaya of Tamenrasset） which is implanted in the south of Algeria. The objective was the study of traditional herbal medicine using the spontaneous medicinal herbs, which constitute one of the socio-cultural aspects of Saharan society in Algeria. Traditional medicine is one reflect of the knowledge and how to live of the local population. Desert people know the various herbs ＇Achebe＇, and its nomenclature. They indicated their site or places of local presence, as well as its own peculiarities and their uses. Our goal is to contribute in enhancing the interest of valorization of these plants in the therapeutic and eventually industrial uses. For that, we need to integrate this perspective into local economic development policies valuing the diversity of plant resources from Tidikelt in the Algerian Sahara.展开更多
This research study was conducted to review the environmental and social impact of mini hydropower plants （run-of-the-river type） by selecting Denawaka Ganga mini hydropower plant, which is located in Ratnapura dist...This research study was conducted to review the environmental and social impact of mini hydropower plants （run-of-the-river type） by selecting Denawaka Ganga mini hydropower plant, which is located in Ratnapura district, Sri Lanka. Field visits and discussions among the authors, authorities and the residents were carried out. Then, the environmental and social impacts were scientifically analysed using regulation degree （RD） and environmental impact value （EIV） scores. It was found out that the Denawaka Ganga mini hydropower plant has induced some environmental concerns; however, significant positive social impact to the society. This is in addition to the green energy generation. Therefore, it can be concluded herein that the Denawaka Ganga mini hydropower is an asset to the country, Sri Lanka.展开更多
基金World Wildlife Fund (WWF) for providing financial support for the conduction of the research through Oaxaca Community Foundationthe National Council for Science and Technology supported the first author through grant for two years
文摘Re-vegetation plays a fundamental role for erosion control and plant recovery in lands affected by gully erosion. Bioengineered practices facilitate the gullies rehabilitation. Objectives of the research were: 1) Identify taxonomically the pioneer vegetation on each gully section; 2) Characterize vegetation distribution preferences and 3) Assess structural/functional traits to recognize erosion control key species. Bioengineering was applied in a watershed belonging to Sierra Madre del Sur, at Oaxaca, Mexico, on eight gullies, with local support and minimal investment. "La Mixteca" is a poor ecological and socio-economic region, comparable to other regions of the world. The Initial Floristic Composition(IFC) inventory is the baseline of the successional process. The transect method was used to determine the colonization of species. Cover abundance of registered species was estimated using the semi-quantitative scale of Braun-Blanquet. This procedure was repeated in five different positions(floor, hillslopes and tops), in the cross section of the gully. Throughcorrespondence analysis and clustering, the distribution of species was analyzed. Adequate responses were obtained in soil retention(quantity) and plant cover(existence and diversity); as measurable indicators of the bioengeneering works efficiency. Occupation of soil by native species from the Tropical Deciduous Forest was favored using live barriers. We detected species guilds with spatial distribution preferences in the gullies cross section. Plant cover characterization includes: native colonizer species, herbaceous, shrubby and trees of the forest community bordering the gully area, with cover abundance and structural/functional traits, useful to protect degraded areas. This spatial occupation process of plants responds to a secondary succession in gullies, where the proposed IFC model is correctly represented through bioengineering. Natural establishment of plants was successful by traits of species such as extensive root system and sexual/vegetative reproduction.
文摘In Western culture, the symbol of the tree which divides into branches and has a foliage of the same lineage as its roots is the best symbol for describing identity and also for describing the Cartesian reasoning which proceeds by eliminating misconceptions and following thesingle true idea. In the West Indies culture, it is the rhizome that is the best symbol to describe the identity of these peoples. The rhizome as explained by Deleuze and Gattari in their Introduction Rhizome of the book .4 thousand plateaus, is a tuber that makes roots after being cut off from its original plant. In this respect, it is most appropriate to describe the people of the Caribbean who have been cut off from their African roots by slavery but who have thrived on the island, re-establishing links with the different peoples who came to work there. The rhizome is similar to the mangrove that protects the island from marine erosion, it intertwines with other plants so that it is impossible to distinguish the source plant. In this respect, it is the best symbol to describe the creole identity and the refusal of the West Indians to return to a racial and social system that promulgated the white race as superior to the black race during colonialism. The structure of the books of Maryse Cond6 is itself rhizomatic since it does not present the theme of its stories through the view point of an omnipotent author but through the view points of all the characters of the novel who by their discussions letthe reader discover their terrible history of slavery, and transform himinto a new man who would seek diversity.
文摘The local plant resources adapted to the desert harsh geomorphologicl environment are a landmark that characterizes the Saharan region： erg, dunes, and wadis. This work emphasizes on some results obtained through a study conducted in 2011, based on surveys and field observations in the Tidikelt oases （in Salah, wilaya of Tamenrasset） which is implanted in the south of Algeria. The objective was the study of traditional herbal medicine using the spontaneous medicinal herbs, which constitute one of the socio-cultural aspects of Saharan society in Algeria. Traditional medicine is one reflect of the knowledge and how to live of the local population. Desert people know the various herbs ＇Achebe＇, and its nomenclature. They indicated their site or places of local presence, as well as its own peculiarities and their uses. Our goal is to contribute in enhancing the interest of valorization of these plants in the therapeutic and eventually industrial uses. For that, we need to integrate this perspective into local economic development policies valuing the diversity of plant resources from Tidikelt in the Algerian Sahara.
文摘This research study was conducted to review the environmental and social impact of mini hydropower plants （run-of-the-river type） by selecting Denawaka Ganga mini hydropower plant, which is located in Ratnapura district, Sri Lanka. Field visits and discussions among the authors, authorities and the residents were carried out. Then, the environmental and social impacts were scientifically analysed using regulation degree （RD） and environmental impact value （EIV） scores. It was found out that the Denawaka Ganga mini hydropower plant has induced some environmental concerns; however, significant positive social impact to the society. This is in addition to the green energy generation. Therefore, it can be concluded herein that the Denawaka Ganga mini hydropower is an asset to the country, Sri Lanka.
