35 surface soil samples and 28 profile soil samples were collected in Longitudinal Range-Gorge Region, Southwest China. The distribution of pollen and spores and their relationship with the environment are analyzed. T...35 surface soil samples and 28 profile soil samples were collected in Longitudinal Range-Gorge Region, Southwest China. The distribution of pollen and spores and their relationship with the environment are analyzed. The results show that there are significant differences in pollen and spores taxa, amounts, dominant taxa and florae between the eastern and western flanks of the Ailao Mountain. There are more pollen and spores taxa, a greater amount and complexity on the western flank of the mountain than those on the eastern flank, while the dominant taxa are more centralized and prominent on the eastern flank of the Ailao Mountain. As for the plant florae distribution, there are significant differences in the number of taxa and composition between the eastern and the western flanks. The analysis of profile pollen and spores assemblage shows that its trends of variation are basically in accordance with the surface pollen and spores, which are also indicators of the environmental differences between the two flanks of the mountain. These significant spatial differences of pollen and spores are very close to the regional topography and climate difference. The mountain running perpendicular to the moisture-laden air flow serves as a barrier and the monsoon circulations the east and the west of the mountain result in different energy-moisture characteristics. We conclude that the main patterns of the pollen and spores can be attributed to the environmental differences.展开更多
The mountainous hydrological process usually shows high variation to climate change and human action. In the Longitudinal Range-Gorge Region（LRGR）, Southwestern China and Southeast Asian, the transboundary runoff va...The mountainous hydrological process usually shows high variation to climate change and human action. In the Longitudinal Range-Gorge Region（LRGR）, Southwestern China and Southeast Asian, the transboundary runoff variations are much more sensitive and complex under the interaction of climate change, ＂corridor-barrier＂ functions in LRGR,and dams building. In this paper, based on the long hydrological records（1956-2013） from three mainstream hydrological stations in Nu River,Lancang River, and Red River, the region runoff variations were analyzed. The results show out： i） the regional runoff changes were strongly influenced by the ＂Corridor-Barrier＂ functions in LRGR from west to east, the variability extent of annual runoff increased, but tended to decrease after 2009 and the reduced extents also increased; ii） the annual runoff change in the three rivers had high concentration degrees; iii） there were periodicities of 33 years of runoff change in Nu River and Lancang River, and 30 years in Red River, and the lower flow period would continue for 8-9 years in Nu River and Lancang River but only for 4 years in Red River; iv） since 2010, as the two mega dams of Xiaowan and Nuozhadu built in Lancang River mainstream, their variations of annual runoff were quite different. The research results could offer a scientific base for sustainable utilization,conservation, and management of the regional water resources展开更多
The major features of different road sections were identified.Methods quantitatively determining the ecological impact of highway construction were discussed,and a demonstration was presented.The Dabao highway(from Da...The major features of different road sections were identified.Methods quantitatively determining the ecological impact of highway construction were discussed,and a demonstration was presented.The Dabao highway(from Dali to Baoshan)and the Sixiao highway(from Simao to Xiaomengyang)passing through the Longitudinal Range-Gorge Region were used as examples in this paper.For the normal road sections having no important species to protect,a method of ecosystem health assessment was introduced to calculate the overall range of the ecological impact of highway construction.For the road sections having plants or soils of interest,indexes were selected and the range of impact was determined using mathematical methods such as regression analysis and variance analysis.The range of impact on animal populations was also discussed in terms of the minimum living areas required by animal populations and the fragmentation caused by highway construction.The results indicate that the zones impacted by highway construction were composed of both regular and anomalous figures,the range of impacts for different landforms of the two sample highways were substantially different;highway construction had dramatic effects on roadside ecosystem health;the impact on soil factors of farmland was greater than 200 m,and the distance may exceed 1000 m when important large animals were considered.展开更多
Taking Dabao （from Dali City to Baoshan City, Yunnan Province, China） and Sixiao （from Simao City to Xiaomengyang Town, Yunnan Province, China） highways in Longitudinal Range-Gorge Region as examples. Biomass, cov...Taking Dabao （from Dali City to Baoshan City, Yunnan Province, China） and Sixiao （from Simao City to Xiaomengyang Town, Yunnan Province, China） highways in Longitudinal Range-Gorge Region as examples. Biomass, coverage and photosynthesis rate of different plant types on sampling points （at the distances from road of 5, 20, 40, 80, 120 and 200 m） and their control points were estimated on ground. The relations among biomass, coverage, photosynthesis rate were analyzed with an aim to explore the mechanism of the effect caused by highway construction on plant biomass. The results show, i） the impacts of highway construction on plant biomass are both positive and negative. Arbor is mainly negatively impacted, while shrub and herbage are mainly positively impacted. The effect of highway construction decrease with the increase of distance from the road; ii） highway construction exert obvious influence on plant biomass through altering the physiologic processes （reflected by the plant number） and photosynthesis, iii） highway construc- tion will result in the decrease of arbor number, photosynthesis rate and biomass, and increase of plant number, photosynthesis rate and biomass of shrub and herbage.展开更多
基金National Basic Research Program of China, No.2003CB415101
文摘35 surface soil samples and 28 profile soil samples were collected in Longitudinal Range-Gorge Region, Southwest China. The distribution of pollen and spores and their relationship with the environment are analyzed. The results show that there are significant differences in pollen and spores taxa, amounts, dominant taxa and florae between the eastern and western flanks of the Ailao Mountain. There are more pollen and spores taxa, a greater amount and complexity on the western flank of the mountain than those on the eastern flank, while the dominant taxa are more centralized and prominent on the eastern flank of the Ailao Mountain. As for the plant florae distribution, there are significant differences in the number of taxa and composition between the eastern and the western flanks. The analysis of profile pollen and spores assemblage shows that its trends of variation are basically in accordance with the surface pollen and spores, which are also indicators of the environmental differences between the two flanks of the mountain. These significant spatial differences of pollen and spores are very close to the regional topography and climate difference. The mountain running perpendicular to the moisture-laden air flow serves as a barrier and the monsoon circulations the east and the west of the mountain result in different energy-moisture characteristics. We conclude that the main patterns of the pollen and spores can be attributed to the environmental differences.
基金funded by the National Key Research and Development Program of China(Grant No.2016YFA0601600)the Key Project of National Natural Science Foundation of China(Grant No.U1202232)
文摘The mountainous hydrological process usually shows high variation to climate change and human action. In the Longitudinal Range-Gorge Region（LRGR）, Southwestern China and Southeast Asian, the transboundary runoff variations are much more sensitive and complex under the interaction of climate change, ＂corridor-barrier＂ functions in LRGR,and dams building. In this paper, based on the long hydrological records（1956-2013） from three mainstream hydrological stations in Nu River,Lancang River, and Red River, the region runoff variations were analyzed. The results show out： i） the regional runoff changes were strongly influenced by the ＂Corridor-Barrier＂ functions in LRGR from west to east, the variability extent of annual runoff increased, but tended to decrease after 2009 and the reduced extents also increased; ii） the annual runoff change in the three rivers had high concentration degrees; iii） there were periodicities of 33 years of runoff change in Nu River and Lancang River, and 30 years in Red River, and the lower flow period would continue for 8-9 years in Nu River and Lancang River but only for 4 years in Red River; iv） since 2010, as the two mega dams of Xiaowan and Nuozhadu built in Lancang River mainstream, their variations of annual runoff were quite different. The research results could offer a scientific base for sustainable utilization,conservation, and management of the regional water resources
基金the National Natural Science Foundation of China(Grant No.40701173)the Public Benefit Project of Scientific Research on Environmental Protection(Grant No.200809072)。
文摘The major features of different road sections were identified.Methods quantitatively determining the ecological impact of highway construction were discussed,and a demonstration was presented.The Dabao highway(from Dali to Baoshan)and the Sixiao highway(from Simao to Xiaomengyang)passing through the Longitudinal Range-Gorge Region were used as examples in this paper.For the normal road sections having no important species to protect,a method of ecosystem health assessment was introduced to calculate the overall range of the ecological impact of highway construction.For the road sections having plants or soils of interest,indexes were selected and the range of impact was determined using mathematical methods such as regression analysis and variance analysis.The range of impact on animal populations was also discussed in terms of the minimum living areas required by animal populations and the fragmentation caused by highway construction.The results indicate that the zones impacted by highway construction were composed of both regular and anomalous figures,the range of impacts for different landforms of the two sample highways were substantially different;highway construction had dramatic effects on roadside ecosystem health;the impact on soil factors of farmland was greater than 200 m,and the distance may exceed 1000 m when important large animals were considered.
文摘Taking Dabao （from Dali City to Baoshan City, Yunnan Province, China） and Sixiao （from Simao City to Xiaomengyang Town, Yunnan Province, China） highways in Longitudinal Range-Gorge Region as examples. Biomass, coverage and photosynthesis rate of different plant types on sampling points （at the distances from road of 5, 20, 40, 80, 120 and 200 m） and their control points were estimated on ground. The relations among biomass, coverage, photosynthesis rate were analyzed with an aim to explore the mechanism of the effect caused by highway construction on plant biomass. The results show, i） the impacts of highway construction on plant biomass are both positive and negative. Arbor is mainly negatively impacted, while shrub and herbage are mainly positively impacted. The effect of highway construction decrease with the increase of distance from the road; ii） highway construction exert obvious influence on plant biomass through altering the physiologic processes （reflected by the plant number） and photosynthesis, iii） highway construc- tion will result in the decrease of arbor number, photosynthesis rate and biomass, and increase of plant number, photosynthesis rate and biomass of shrub and herbage.
基金Supported by the National Basic Research Program of China(Grant No.2003CB415101)Key Project of Yunnan Natural Science Foundation of China(Grant No.2003C0002Z)
基金Supported by the National Basic Research Program of China(Grant No.2003CB415100)the Climate Change Program of China Meteorological Administration(Grant No.CCSF2007-23)High Performance Computer Center of Yunnan University
基金This work was supported by the National Basic Research Program of China （973） （Grant No. 2003CB415104） and the Science Foundation of Post Doctors in China （Grant No. 2005038321）
基金Supported by the National Basic Research Program of China(Grant No.2003CB415104)the National Natural Science Foundation of China(Grant Nos.40501067 and 40701173)
基金Supported by the National Basic Research Program of China(Grant No.2003CB415100)the Key Project of Natural Science Foundation of Yunnan Province(Grant No.2003C0002Z)
