CONSERVATION OF PLANT DIVERSITY AT SOME WADIS IN SOUTH WESTERN KSA
The conservation strategy goal is to strengthen plant communities with high biodiversity. Wadis are one of the important areas of Tehamah region (Saudi Arabia) sheltering a rich diversity of higher plants. The study area is extended into approximately100 km2 encompassing the commonest geomorphological features encountered in desertwadis. The studied wadis (Khedran, Rash, Maleil) support several rare plants, including a regionally endangered tree, Acacia ehrenbergiana Hayne, Atriplexhortensis L., Anisitusrisoolaus L. and Aervajavanica L., a rare shrub with restricted distribution.The present study aims to maintain their existence and health,a management system must be established. The vegetation type is fundamentally of chamaephytic nature with some phanerophytes, and distinguished into associations where the dominant perennial species givethe permanent character of plant cover in each habitat. Three vegetation groups above were identified by named with Chaudary book with main associates of Cassia acutifolia Mill.; Calotropisprocera L.and Aervajavanica L. These plant with associations demonstrate significant variation in soil texture, moisture, organicmatter, pH, EC, and minerals of Wadi Mangal. Many measurements and calculations were done. Pioneer data were recorded for these three wadis.