Last glacial to Holocene evolution of semi-arid rangelands in southeastern Australia

被引:40
作者
Cupper, ML [1 ]
机构
[1] Univ Melbourne, Sch Earth Sci, Melbourne, Vic 3010, Australia
[2] Univ Melbourne, Sch Anthropol Geog & Environm Studies, Melbourne, Vic 3010, Australia
关键词
last glacial; Holocene; playas; transition; late Pleistocene; Murray Basin; pollen; semi-arid rangelands; dunefields; Australia;
D O I
10.1191/0959683605hl829rp
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Pollen sequences from playa lakes in the Darling Anabranch dunefields of southwestern New South Wales record vegetation changes over the last glacial period and into the Holocene. This interval was one of marked taxonomic and structural reorganization, with the plant communities that became established after the last glacial maximum (LGM; similar to 24-18 ka) distinct from those that had prevailed over the build-up to full glacial conditions ( similar to 70-24 ka). The glacial period was characterized by a gradual reduction of woodland and tall shrubland cover. Recolonization of the dunefields involved a similar, gradual succession from herbfields and low shrublands to tall shrublands and, finally, woodlands. These changes are likely to have been driven by climatic change, particularly fluctuations in temperature, precipitation and atmospheric CO(2), as global climate systems entered and emerged from the last glaciation.
引用
收藏
页码:541 / 553
页数:13
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