Bøger af Khadidja Bouzid

This course introduces the principles of ecology that enable us to understand how ecosystems function, a prerequisite for understanding the main factors behind their dysfunction. The concept of an ecosystem results from and is presented as an integrated unit with its various abiotic and biotic components. Every living thing is a source of food for another living organism, which constitutes what is known as the trophic chain or food chain, and consists in the transfer of matter and energy from one trophic level to another. Climate change and the intensive use of habitats by mankind are at the root of many environmental upheavals. These disturbances are causing a loss of biodiversity. A number of research studies have demonstrated the negative impact of biodiversity loss on ecosystem functioning. The study of ecosystem functioning and the importance of diversity in maintaining ecological processes are taking on new importance.

Arbutus unedo L, commonly known as Arbutus, is a species known for its ecological and economic importance throughout its range, particularly in Algeria. It is of great interest in maintaining biodiversity, which is why its preservation is so important today. However, its wealth of active ingredients and natural substances, which confer therapeutic virtues on it, deserves to be studied and valorized, by characterizing its phytochemical compounds, and identifying their chemical profiles and antioxidant activities. Such a study would highlight the plant's ethnobotanical and industrial interest, and we therefore propose its domestication and cultivation as an industrial crop. In this context, the present work makes a contribution to the development of the species Arbutus unedo L, an Ericaceae from western Algeria.