Progress of Quaternary Paleoenvironmental Reconstruction Based on Chironomid

• 1、Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000

Abstract：Chironomidae (Diptera) becomes a rapid developing proxy in the international paleolimnology in recent 20 years for its short life cycle, strong ability to move and sensitive response to environmental change. The main progress of paleolimnological research based on chironomid can be summarized as the following four aspects: (1)the establishment of a large number of sample training sets and transfer functions, as well as the comparison and integration of regional databases; (2)more attention on the role of internal lacustrine factors in controlling of the chironomid population; (3)attention on finer time scales since the modern interglacial period; (4)improvement of the experimental technology and numerical methods, and constant development of new indicators. The domestic related research starts late, but has established databases in the middle and lower reaches of the Yangtze river and the Tibetan Plateau so far, and also has carried out some researches on the internal lacustrine factors on chironomid population; paleoenvironmental reconstruction is mainly concentrated in the northwest arid areas, and the research in eastern region is primarily focused on reflecting the effects of recent state of human activities on the lakes. Paleoenvironment and paleoclimate researches based on chironomid urgently need (1)doing more individual ecology work to accurately understand the relationship between the species and environmental factors, combined with the investigation of a broader area; (2)further improving the efficiency of experiments by new technology to enhance the resolution of identification; (3)paying attention to the application of the advanced quantitative ecology methods and the emerging indicators in the study; (4)attaching great importance to the role of chironomid in the definition of lake natural state and the ecological restoration.

Keywords： Subfossil chironomid Palaeoenvironment Palaeoclimate Research progress