A strategy of selecting tree species for ecological restoration in Qinghai Lake Basin Based on the Holocene vegetation records of pollen and wood charcoals in the Qinghai Lake
Under the global warming and human activity enhancing, the ecological environment in Qinghai Lake Basin is gradually deteriorated. As an important area for maintaining ecological security in the northeastern Qinghai-Tibetan Plateau, the problem of local ecological environment in Qinghai Lake is severe, and the necessarity of restoring local ecological system is very urgent. Thus, it is very important and economical to select suitable tree species which will adapt to the future climate warming. In this study, based on the dynamic evolution perspective from the theory of Quaternary science, wood charcoal and pollen records of Qinghai Lake during Holocene were comprehensively analyzed, and the vegetation variations of Qinghai Lake Basin during Holocene were reconstructed. The results show that willow, spruce, pinus, and betula existed a long time in the Qinghai Lake Basin during the entire Holocene. Combined with the modern climate condition and future warming trends of Qinghai Lake Basin, spruce can be selected to be the most suitable species for local ecological restoration in future; willow and betula can be taken as important alterative species.