Project Name: Longitudinal Range-Gorge Region (LRGR) Corridor-Barrier Function Rules and Maintaining Mechanism of Ecological System Diversity
Main Investigator: HE Daming (Yunnan University), WU Shaohong (Institute of Geographic Sciences and Natural Resources Research, CAS), PENG Hua (KIB), ZHANG Yaping (Kunming Institute of Zoology, CAS), YE Hui (Yunnan University), CHEN Yifeng (Institute of Hydrobiology, CAS), OU Xiaokun (Yunnan University).
Important scientific discoveries of the Project:
LRGR, refers to the ridge valley formed with the uplift of Qinghai-Tibet Plateau all through Southwest Peninsula and Indo-China Peninsula, characterized with interval landscapes, the main part of which is within Yunnan Province and its neighboring regions. LRGR features the richest biological diversity in the world, being a key region for the exploration of the major scientific propositions involving environmental heterogeneity and biological diversity. Academicians including WU Zhengyi, CHEN Yiyu, TU Guangzhi, WU Xinzhi and TENG Jiwen thought: LRGR is the ideal region for the investigation of coupling mechanism and interaction process of the global earth-air-water-biology-human system and its corresponding resource and environment effects would be signification strategic meanings and scientific research values to the cross-border resources and biological safety within the country, Southeast Asian and South Asian areas (Ministry of Science and Technology, CAS, People's Government of Yunnan Province, "Yunnan – Evolution from the Ancient" (comprehensive academic) Seminar, 2002).
Through integrated scientific survey, sampling analysis, numerical simulation and other systematic researches, the project has revealed the function rules and ecological effect of the 'Corridor – Barrier' as follows:
1. Defined the physiognomy pattern concept of "Longitudinal Range-Gorge Region", "corridor function and diffusion effect" and the function mechanism of "barrier function and barrier effect"; established the LRGR ecological system change and ecological security theory system; received the original results in terms of LRGR special environment features, corridor-barrier function rules & multi-scale correlation effects, evolution and maintaining mechanism of biological diversity, cross-border impact and security control of ecological changes;
2. Found that the special environment features of LRGR has dominated the circulation and the pattern of "water-heat-air" of this region, which showed the obvious corridor-barrier function rules: The water vapor of the wet season within this region is primarily caused from the effects of the Indian Ocean; in summer, airflow from the Bay of Bengal and the another airflow from the South China Sea controlled by the terrain of LRGR would from into two strong updrafts, featuring signification zonal variations and relatively uniform longitudinal variations; the high value line of NPP at north is consistent with the distribution area of "wet-tongue"; the tropical (ravine) rain forest is beyond 24°N and reaches 27-28°N; autocorrelation of the space of potential evaporation is significant;
3. Found the "corridor-barrier" function of LRGR is the key biological mechanism for the formation, evolution and maintenance of the biological diversity of this region; the investigation on the fish system structure has further proved the mutual isolation time orders of all the water systems within the region, e.g. Irrawaddy River and the Yarlung Zangbo River were isolated at 5.07~4.09 Ma, Lantsang and Salween River were isolated at 2.03~1.97 Ma. Besides, the "corridor-barrier" function mechanism has also dominated the path of the biological cross-border invasion, diffusion & migration process and distribution pattern, e.g. the temporal and spatial variation rules of Bactrocera dorsalis including "horizontal space, vertical communication, island distribution and season diffusion";
4. Found the signification cross-border impact of the biological system of LRGR is closely associated with its corridor function and diffusion effect; defined the main driving factors and the multi-scale cross-border ecological effect of the ecological hydrological process changes for the international river mainstreams (>3000 km) for the first time; put forward and created the comprehensive regulation pattern for the land-frontier cross-border ecological security.
It published in total 717 papers (including 175 papers in SCI journal, 13 EI papers; 135 papers cited by SCI journal for 616 times), 3 representative papers sited by SCI journal for 22 times, the total impact factor per paper is 73.68; published 6 monograph series; put forward 1 representative paper involving LRGR concept and corridor-barrier function rule mechanism, which was honored the title of "Top 100 Most Cited Chinese Papers Published in Domestic Journals 2007"; Ecology Top News commented that the establishment of the comprehensive regulation pattern for the land-frontier cross-border ecological security "has explored the new visions for the Asian researches"; 12 high level consulting reports including "Five Kinds of Cross-border Ecological Impacts" were published in the Domestic Dynamic Proof, providing scientific proofs for the stipulation of relative important national policies, playing an important role in the prevention of disorderly development activities within LRGR and offering the decision supports.