The history of vegetation and climate changes of Yunnan in response to the uplift of Tibetan Plateau during the Neogene

AbstractA high-resolution pollen record of the Atlantic rain forest (ARF) biome from the coastal Serra do Tabuleiro mountains of southern Brazil documents an 11,960 yr history of vegetation and climate change. A marked expansion of Weinmannia into the grassland vegetation marks the latter part of the Younger Dryas, reflecting warm and relatively wet conditions. Between 11,490 and 9110 cal yr BP, grasslands became dominant again, indicating a long cold and dry phase, probably in response to the stronger influence of cold South Atlantic seawater and to Antarctic cold fronts. Between 9110 and 2640 cal yr BP, four distinct phases with strong or moderate expansions of different ARF biome taxa were recorded, reflecting warmer and relatively dry conditions with changes in rainfall and length of the annual dry season. After 2640 cal yr BP, the modern ARF biome became established with high amounts of ferns, reflecting somewhat cooler and wetter conditions with a reduced annual dry season. In particular, after 1000 cal yr BP tree ferns increased, reflecting wetter conditions with no dry season.

Download Full-text

A 28,000year history of vegetation and climate from Lower Red Rock Lake, Centennial Valley, Southwestern Montana, USA

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2012.01.036 ◽

2012 ◽

Vol 326-328 ◽

pp. 30-41 ◽

Cited By ~ 14

Author(s):

Stephanie Ann Mumma ◽

Cathy Whitlock ◽

Kenneth Pierce

Keyword(s):

Southwestern Montana ◽

History Of Vegetation ◽

History Of ◽

Rock Lake ◽

Vegetation And Climate

Download Full-text

Late Holocene Climatic Changes in Western Equatorial Africa Inferred from Pollen from Lake Sinnda, Southern Congo

Quaternary Research ◽

10.1006/qres.1998.1979 ◽

1998 ◽

Vol 50 (1) ◽

pp. 34-45 ◽

Cited By ~ 86

Author(s):

Annie Vincens ◽

Dominique Schwartz ◽

Jacques Bertaux ◽

Hilaire Elenga ◽

Christian de Namur

Keyword(s):

Late Holocene ◽

Major Change ◽

Abrupt Decrease ◽

Paleoclimatic Reconstruction ◽

The Past ◽

Equatorial Africa ◽

History Of Vegetation ◽

Drying Up ◽

History Of ◽

Vegetation And Climate

Pollen analysis of two cores from the Lake Sinnda, located in one of the driest areas of the southern Congo, reveals a history of vegetation and climate in this region during the past 5000 yr. A major change centered around 3000–2500 yr B.P. is indicated by an abrupt decrease in forest pollen and by a corresponding increase in grassland pollen. Concurrent drying up of the lake shows that climate, in particular aridity, was the major cause of this change. This paleoclimatic reconstruction conforms with evidence for drier conditions in other parts of western equatorial Africa, such as the development of isolated enclosed savannas and of heliophilous forested formations. The aridity is recorded more fully at Lake Sinnda than at the previous studied ones. It probably lasted longer, from 4200 to 1300 yr B.P., and was more progressive than previously inferred. The aridity predates agriculture marked by pollen of the oil palm at Lake Sinnda.

Download Full-text

The Late Quaternary History of Vegetation and Climate at Porcupine Mountain and Clearwater Bog, Manitoba

Arctic and Alpine Research ◽

10.2307/1550287 ◽

1969 ◽

Vol 1 (3) ◽

pp. 155 ◽

Cited By ~ 11

Author(s):

Harvey Nichols

Keyword(s):

Late Quaternary ◽

History Of Vegetation ◽

History Of ◽

Quaternary History ◽

Vegetation And Climate

Download Full-text

Histoire de la végétation et du climat de l’Afrique nord-tropicale au Quaternaire recent*

Bothalia ◽

10.4102/abc.v14i3/4.1182 ◽

1983 ◽

Vol 14 (3/4) ◽

pp. 377-389 ◽

Cited By ~ 17

Author(s):

J. Maley

Keyword(s):

Late Quaternary ◽

Major Change ◽

Important Change ◽

Critical Examination ◽

Tropical Zone ◽

History Of Vegetation ◽

History Of ◽

Quaternary History ◽

Vegetation And Climate ◽

Qualitative Changes

LATE QUATERNARY HISTORY OF VEGETATION AND CLIMATE OF TROPICAL NORTH AFRICAThe critical examination o f available pollen data from the vegetation of the Sahara allows one to conclude that this vegetation has gone through but few qualitative changes during the last twenty thousand years. In particular, one notices an extension in the Sahara of tropical Sahel taxa about the middle of Holocene. Quantitatively, some pollen and geological data converge to Show that the Saharian plains were extremely arid between about 20 000 and 15 000 years BP and that on the mountains the vegetation became very sparse. A new colonization began on the mountains about 15 000 years ago.The pollen study of Holocene sediments from the central part o f the Chad basin was done in the Tjéri station. The results of this study exhibit a major change near 7 000 years BP, characterized in the Sahel zone by a dramatic extension o f arboreal taxa until about 5 000 years BP, probably corresponding to northward extension of the sahel savanna. One important change took place also at the same time in the wet north tropical zone where, between about 7 000 and 4 000 years BP, there occurred an extension of taxa growing presently on the well-leached soils of interfluves.Such a change near 7 000 years BP also appears in the available stratigraphical, sedimentological and pedological data from tropical north Africa. One observes particularly that, between 15 000 and 7 000 years BP, the

Download Full-text