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Paleovegetational and paleoclimatic changes in Ha'ni lake, Jilin since 5 kabp
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Journal Article
Paleovegetational and paleoclimatic changes in Ha'ni lake, Jilin since 5 kabp
2006
Overview
According to the spore pollen analysis results of 85 core samples from Ha'ni Lake, the history of vegetation and environment can be divided into four stages as follows: (1) Stage I (5 112-3 784 aBP): Broadleaved trees dominated in this stage, and the climate was warm and wet; (2) Stage II (3 784-1 380 aBP) :The coniferous trees dominated during the whole stage, hydrophytic herbaceous plants disappeared, and the climate changed to be cold and dry; (3) Stage III (1 380-994 aBP) :The percent of coniferous trees continued to increase but hydrophytic herbaceous plants began to appear, suggesting that the climate was colder but a little more humid; (4) Stage IV (994-0 aBP): The diversity of plants was great, and the pollen sedimentation rate of hydrophytic herbaceous plants obviously increased, so the climate changed to be more humid.
Subject
