Microevolution can have consequences at higher levels of ecological organization. Although divergence among populations be rapid and driven by anthropogenic changes to the environment, relevance evolution induced human activities remains poorly understood. A frequent way in which drive microevolution is increase supply nutrients such as phosphorus (P) that are required for fitness-relevant trai...

Due to drought, low soil fertility, little rain fall, elevated levels of evapotranspiration, salinization the and a lack ground water, problem desertion agricultural areas has developed in KSA recent years (e.g. Tabuk region). In Saudi Arabia, land abandonment’s negative impact on composition perennial vegetation, quality, structure population was investigated. several abandoned fields research...