Floristic Diversity of Recruits in Plantations of Eucalyptus Deglupta B., 1863, Pinus Caribeae M., 1851, And Gmelina Arborea R., 1814: Case of Cellucam Plantations Near Edea (Litoral, Republic of Cameroon) (Published)
Floristic diversity is the set of plant species of an ecosystem or a given environment. Recruits are species regenerated after a disturbance in an environment. In this study it is a natural regeneration different from the artificial regeneration. The main objective of this study is to assess the level of natural regeneration under the artificial plantations. The strip sounding method is used over approximately two (2) hectares per type of plantation. Parameters measured are the abundance of recruits, the specific richness, the abundance of genera and families and the diameters of the stems. The floristic diversity was assessed through five indices. These are the Shannon indices, Simpson indices, Hill indices, regularity indices and generic diversity indices. . The results of the inventory show that the abundance of recruits is significantly different in the plantations and the surrounding forest. Species richness varies by type of plantation. Almost all of the three types of vegetation in the plantations have a Shannon index significantly greater than 1 and testifies to the very high diversity. The 1-Hill difference reached the value 0.97, 0.94 and 0.9 which values very close to 1. The regularity index shows that the taxa of plant communities of the recruits are not regularly distributed and have a low taxonomic richness. The lowest value of the generic diversity indices is 1.07. This shows that generic diversity is low in the three plantations. The floristic affinity between the 3 plantations is greater than 50%. According to Sørensen, these results demonstrate that the three plantations have the same floristic composition and constitute the same biological unit.
INTEGRATED SOLAR GREEN HOUSE FOR WATER DESALINATION AND PLANTATION IN REMOTE ARID EGYPTIAN COMMUNITIES: MODELING AND ANALYSIS (Published)
Solar desalination is considered as one of the promising renewable energy-powered technology for producing fresh water. The Seawater greenhouse (SWGH) system uses the solar desalination principle and works by saturating the air with moisture vaporizing from saline water inside a greenhouse and later dehumidifying, thus, causing freshwater condensation. The SWGH is a unique concept which combines natural processes, simple construction techniques to provide a low-cost solution to one of the world’s greatest needs-fresh water. It is a method of cultivation that provides desalination, cooling and humidification in an integrated system. Self-sufficiency in water production combined with low internal irrigation requirements mean that the SWGH offers significant water saving by reducing agricultural demand on main and groundwater. Its purpose is to provide a sustainable means of agriculture in arid coastal areas where the scarcity of freshwater and expense of desalination threaten the viability of agriculture.