Relationship between pollen assemblages and organic geochemical proxies and the response to climate change in the Zhuye Lake sediments

摘要

This paper examines the relationship among organic geochemical proxies(TOC,C/N ratio andδ13C)and pollen assemblages in Zhuye Lake sediments since the Late Glacial.Results show that the reaction extent of organic geochemical proxies and pollen assemblages to environment changes are different.Organic geochemical proxies are sensitive to overall environmental change,while pollen assemblages indicate detailed information of environmental change.For the entire sedimentary section(except the sand layer from the bottom of the section),when values of TOC,C/N ratio and total pollen concentrations are high,δ13C values are low,and vice versa.The different responses of organic geochemical proxies and pollen records in Zhuye Lake are mainly due to their different sensitivity and diverse influencing factors in different environmental conditions.