Monitoring recent and reconstructing Holocene vegetation change around Nam Co Lake,Tibet,using palynofloras
In the year 2005 there have been taken about 90 soil samples around Nam Co Lake,Tibet as well as one drill core (1.8 m,30 samples) out of a swamp for pollen analysis.Also a Burkard Pollen Trap was installed at Nam Co Station to catch airborne pollen at Nam Co Lake area with daily solution.Using the soil samples we have made a South to North transect at the eastern part of Nam Co Lake for the recognition of vegetation changings in this area.The more north the sample was taken the less number of different species (of pollen) were found in the sample.Using the drill samples we have made a reconstruction of the vegetation history of Nam Co area for the last 9,000 years.In the lower part of the drill samples there were a lot of charcoal particles and less pollen discovered.But at about 1,000 a BP there is visible a clear changing in vegetation history.At that time the amount of charcoal is decreasing and the amount of pollen is increasing.Also the amount of angiosperm pollen and fungal remains are strongly increasing.Using the airbome pollen we have evidence for pollen with long distance transport origin (eg.Alnus,Betula,Pinus,Tsuga) and hence we can recognise monsoonal activity at Nam Co Lake area.In a next step we try to find out the source regions of this long distance transported pollen.
Nam Co Lake Tibet Pollen Vegetation and Climate History
Mark Herrmann Xinmiao Lu
Senckenberg Research Institute and Natural History Museum,Senekenberganlage 25,D-60325 Frankfurt/Mai Institute of Tibetan Plateau Research,Chinese Academic of Scieneces,Beijing 100085,China
国际会议
乌鲁木齐
英文
39-41
2007-09-01（万方平台首次上网日期，不代表论文的发表时间）