Modern pollen assemblages in lake surface sediments and their relationships with vegetation, climate, and human activities in Yunnan, SW China

IF 1.7 3区地球科学 Q2 PALEONTOLOGY Review of Palaeobotany and Palynology Pub Date : 2024-09-14 DOI:10.1016/j.revpalbo.2024.105205

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Abstract

Modern pollen assemblages from moss polsters, topsoils, and lake surface sediments are crucial for interpreting palaeovegetational and palaeoclimatic conditions from fossil pollen records. While a large number of modern pollen assemblages exist from Yunnan Province, SW China, few are derived from lake surface sediments with depositional environments similar to those of fossil pollen records. In this study, we present modern pollen assemblages from lake surface sediments across 36 lakes in Yunnan, spanning spatially from the southeast to the northwest of the region. These lakes encompass a range of vegetation types, varying from alpine meadow grasslands to tropical seasonal and montane rainforests. Our findings demonstrate that modern pollen assemblages from lake surface sediments can effectively identify various vegetation zones. Redundancy analysis (RDA) reveals a strong correlation of pollen assemblages with climate factors (e.g., temperature and precipitation) but a weak correlation with human activities. This study suggests that modern pollen assemblages from lake surface sediments in Yunnan can be used not only to reflect changes in vegetation and climate, but also as reliable indicators for reconstructing the history of human activities to some extent.

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中国西南部云南湖泊表层沉积物中的现代花粉组合及其与植被、气候和人类活动的关系

苔藓褶皱、表土和湖泊表层沉积物中的现代花粉组合对于从花粉化石记录中解读古植被和古气候条件至关重要。虽然中国西南部云南省有大量的现代花粉组合，但很少有来自湖泊表层沉积物的现代花粉组合与化石花粉记录的沉积环境相似。在本研究中，我们展示了云南 36 个湖泊湖面沉积物中的现代花粉组合，这些湖泊的空间范围从云南的东南部到西北部。这些湖泊涵盖了从高山草甸草原到热带季雨林和山地雨林的各种植被类型。我们的研究结果表明，湖泊表层沉积物中的现代花粉组合可以有效识别各种植被区。冗余分析（RDA）显示，花粉组合与气候因素（如温度和降水）有很强的相关性，但与人类活动的相关性较弱。该研究表明，云南湖泊表层沉积物中的现代花粉组合不仅可用于反映植被和气候的变化，还可在一定程度上作为重建人类活动历史的可靠指标。

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来源期刊

Review of Palaeobotany and Palynology 地学-古生物学

CiteScore

3.50

自引率

21.10%

发文量

149

审稿时长

6 months

期刊介绍： The Review of Palaeobotany and Palynology is an international journal for articles in all fields of palaeobotany and palynology dealing with all groups, ranging from marine palynomorphs to higher land plants. Original contributions and comprehensive review papers should appeal to an international audience. Typical topics include but are not restricted to systematics, evolution, palaeobiology, palaeoecology, biostratigraphy, biochronology, palaeoclimatology, paleogeography, taphonomy, palaeoenvironmental reconstructions, vegetation history, and practical applications of palaeobotany and palynology, e.g. in coal and petroleum geology and archaeology. The journal especially encourages the publication of articles in which palaeobotany and palynology are applied for solving fundamental geological and biological problems as well as innovative and interdisciplinary approaches.