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Ben-Gurion University of the Negev (2010)

Impacts of single farms establishment on reptile and beetle diversity in the Ramat HaNegev Desert

Wamuyu Muithui Lucy

Titre : Impacts of single farms establishment on reptile and beetle diversity in the Ramat HaNegev Desert

Auteur : Lucy Wamuyu Muithui

Université de soutenance : Ben-Gurion University of the Negev

Grade : Master of Science 2010

Résumé
The HaNegev region has been a major focus due to development policies. With the rapid development of single farms and other settlements in the recent years this has lead to accelerated changes in the natural arid habitats. Single farms are now the common form of residence in the region. This form of settlement is increasing with emphasize of having more Jewish families establishing in the desert. Human developments such as the single farms and other land uses in arid lands such as the Negev are contributing to the modification of natural habitat, including the introduction of new disturbances. In the process this disturbances alter the distribution, change and to the extent lead to loss of biodiversity. With the different land use activities that are practiced, the impact they have on the surrounding areas is not known. With such changes both species abundance and species richness are affected. To investigate the impact these settlements have I did my study on 13 farms, whose main activities (farm type) were agriculture (cultivated and animal) and tourism. To measure the effects I used reptiles and beetles as my models species. Since both species are known to be particularly sensitive to changes due to their ecological constraints, and in particular the populations of reptiles are known to be globally affected by to land-use practices. Here, the impact of farm type and distance from farms was used to analyze the abundance, species richness and composition of reptiles and beetles. The study on the farms was done with the aim to test following predictions (i) that distances from the farm would have an effect on the abundance, species richness and composition and (ii) farm types would have different effects on abundance, species richness and composition at different distances on both reptiles and beetles. Pitfall traps were used for capture both species. This was done in summer and spring. My results shows that for beetle both abundance and species richness were not affected by distance ; however (farm type) had a significant effect. Seasonality also affected the abundance and species richness of beetles. Reptile abundance and richness was affected by both distance and activity (farm type). Cultivated agriculture affected both species richness and abundance of the reptiles.

Mots Clés : Beetles — Variation — Israel — Negev. - Desert ecology — Israel — Negev — Case studies. - Land use, Rural — Environmental aspects — Israel — Negev. - Reptiles — Variation — Israel — Negev

Présentation (BGU)

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Page publiée le 7 janvier 2012, mise à jour le 26 novembre 2018