Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/qua.2017.48 |
Lowland forest collapse and early human impacts at the end of the African Humid Period at Lake Edward, equatorial East Africa | |
Ivory, Sarah J.1,2; Russell, James1 | |
通讯作者 | Ivory, Sarah J. |
来源期刊 | QUATERNARY RESEARCH
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ISSN | 0033-5894 |
EISSN | 1096-0287 |
出版年 | 2018 |
卷号 | 89期号:1页码:7-20 |
英文摘要 | In Africa, the early Holocene was characterized by wetter, warmer conditions than today, followed by rapid aridification at similar to 5.2 ka. However, a lack of lowland vegetation records has prevented a detailed evaluation of forest response to Holocene climate change. Additionally, although modern vegetation communities are linked to human disturbance, few studies have addressed how prehistoric human activities helped engineer the character of modern African ecosystems. Understanding the architecture of lowland and highland forests is important to prevent further degradation from climate/land-use change. We present an 11,000 yr fossil pollen record from Lake Edward, Uganda. We show that Guineo-Congolian forests dominated the highlands and lowlands in equatorial East Africa in the early Holocene, highlighting the importance of rainfall and temperature in controlling forest communities. These forests remained until similar to 5.2 ka, when the climate became drier. The lacustrine ecosystem response to aridification was abrupt; however, forest decreased gradually, replaced by deciduous woodlands. Woodlands dominated until after an arid period at 2 ka; however, forest did not recover. Increased disturbance indicators and grasses suggest that the arrival of Iron Age people resulted in the modern fire-tolerant vegetation. Although late Holocene climate played a role in vegetation opening, the modern ecosystem architecture in East Africa is linked to early human activities. |
英文关键词 | Africa Paleoecology Paleoclimate Tropical forests Holocene Iron Age African Humid Period |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000425965700002 |
WOS关键词 | LAST GLACIAL MAXIMUM ; UGANDA-CONGO ; LATE PLEISTOCENE ; WESTERN UGANDA ; LATE HOLOCENE ; RAINFALL SEASONALITY ; VEGETATION RESPONSE ; TROPICAL AFRICA ; POLLEN EVIDENCE ; LATE QUATERNARY |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/212489 |
作者单位 | 1.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA; 2.Univ Kentucky, Dept Earth & Environm Sci, Lexington, KY 40506 USA |
推荐引用方式 GB/T 7714 | Ivory, Sarah J.,Russell, James. Lowland forest collapse and early human impacts at the end of the African Humid Period at Lake Edward, equatorial East Africa[J],2018,89(1):7-20. |
APA | Ivory, Sarah J.,&Russell, James.(2018).Lowland forest collapse and early human impacts at the end of the African Humid Period at Lake Edward, equatorial East Africa.QUATERNARY RESEARCH,89(1),7-20. |
MLA | Ivory, Sarah J.,et al."Lowland forest collapse and early human impacts at the end of the African Humid Period at Lake Edward, equatorial East Africa".QUATERNARY RESEARCH 89.1(2018):7-20. |
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