江陵剖面沉积物孢粉提供全新世早期人类活动的证据。早期人类活动始于6 200 a B.P.,人类大规模活动始于3 400 a B.P.。随着定居点扩大和人类活动加强,地表土壤侵蚀严重,入湖的陆源粗颗粒物质和营养物质增多。湖泊沉积物表现为粗颗粒含量迅速增加,各粒径波动频繁,TOC、TN和C/N的高值以及有机质δ13C的低值。2 500 a B.P.以后,沉积环境发生了显著变化,由湖泊及湖沼堆积转化为洪水漫滩堆积,气候变干,人类逐渐撤离该地区。
The evidence of human activities around Jiangling area was revealed by sporo-pollen records from sediments in the Jiangling section, Hubei Province. The preliminary human activities started from about 6 200 yr B.P., marked by cultivation on economic crop Papaverraceae and the increased occurrence of pasture plant, such as Labiatae and Plantago. The increased herbs of pasture and crop suggested the primitive stockbreeding and agriculture in the study region. The human activities increased from about 4 700 yr B.P. The broad-leaved trees of Betula and Ulmus, and the aquatic herbs of Myriophyllum, and the spore of Selaginella and Microlepria, started to appear continuously in large amounts, and the weed plants of Artemisia had a speedy increase. The human activities were mainly agricultural planting and grazing near settlement, yet with small piece of economic trees. The large-scale human activities started from 3 400 yr B.P., the Gramineae content ascended fleetly, suggesting the extension of farmland around the lake shore. The broad-leaved trees of Betula, Ulmus, and the herbs of Papaverraceae, Labiatae, Plantago, Artemisia, Chenopodiaceae, Myriophyllum, and the spore of Selaginella, Microlepria had a evident increase. The increases in broad-leaved trees and weed herbs indicate the expansion of settlement around which broad-leaved trees were replanted. The extension of settlement and the enhancement of human activities resulted in the enhanced erosion of surface soil and the increase of coarse particle matters from land and nutritive material. The lacustrine sediments were characterized by the prompt increase of coarse materials, and frequent fluctuation of different forms of grain size, and high value of TOC, TN, and C/N, and low value of organic matter δ13C. The sedimental environment came to evident variance after 2 500 yr B.P., that is, lacustrine and limnic deposit became to floodplain deposit, and human evacuate from Jiangling area by degrees.
[1] Yang X D, Shen J, Richard T Jones, et al. Pollen evidence of early human activities in Erhai basin,Yunnan Province[J]. Chinese Science Bulletin,2005, 50(6):568-576.
[2] 胡金明,崔海亭,李宜垠. 西辽河流域全新世以来人地系统演变历史的重建[J]. 地理科学,2002,22(5):535~542.
[3] 翁齐浩. 珠江三角洲全新世环境变化与文化起源及传播的关系[J]. 地理科学,1994,14(1):1~8.
[4] Risberg J,Karlsson S,Hansson A M, et al. Environmental changes and human impact as recorded in a sediment sequence offshore from a Viking Age town, Birka, southeastern Sweden[J]. The Holocene,2002,12(4):445-458.
[5] Vermoere M,Bottema S,Vanhecke L, et al. Palynological evidence for late-Holocene human occupation recorded in two wetlands in SW Turkey[J]. The Holocene,2002,12(5):569-584.
[6] 任国玉. 科尔沁沙地东南缘近3000年来植被演化与人类活动[J]. 地理科学,1999,19(1):42~48.
[7] 王萍莉,张金谈. 中国青冈栎花粉形态及其与栎属的关系[J]. 植物分类学报,1988,26:282~289.
[8] Shen J,Yang L Y,Yang X D, et al. Lake sediment records on climate change and human activities since the Holocene in Erhai catchment, Yunnan Province, China[J]. Science in China (D),2005,48(3):353-363.
[9] Yasuda Y,Kitagawa H,Nakagawa T. The earliest record of major anthropogenic deforestation in the Ghab Valley, northwest Syria: a palynological study[J]. Quaternary International,2000,73:127-136.
[10] 谢远云,李长安,王秋良, 等. 江汉平原9.0 ka B.P.以来的气候演化: 来自江陵剖面沉积物记录[J]. 地理科学,2006,26(2):199~204.
[11] 羊向东,王苏民,童国榜. 江苏固城湖区一万多年来的孢粉植物群及古季风气候变迁[J]. 植物学报,1996,38(7): 576~581.
[12] 羊向东,朱育新,蒋雪中, 等. 沔阳地区一万多年来孢粉记录的环境演变[J]. 湖泊科学,1998,10(2):23~29.
[13] 许清海,杨振京,崔之久, 等. 赤峰地区孢粉分析与先人生活环境初探[J]. 地理科学, 2002,22(4):453~457.
[14] 张振克,吴瑞金. 近300年来岱海流域气候干湿变化与人类活动的湖泊响应[J]. 首都师范大学学报(自然科学版),2001,22(3):70~76.
[15] 朱育新,王苏民,羊向东, 等. 中晚全新世江汉平原沔城地区古人类活动的湖泊沉积记录[J]. 湖泊科学,1999,11(1): 33~39.
[16] 周凤琴. 云梦泽与荆江三角洲的历史变迁[J]. 湖泊科学,1994,6(1):22~32.
[17] Rosenmeier M F,Hodell D A,Brenner M, et al. A 4000-year lacustrine record of environmental change in the southern Maya lowland, Peten, Guatemala[J]. Quaternary Research,2002,57:183-190.
[18] 杨汉东,蔡述明. 江汉平原湖泊沉积物的化学特征及其与人类活动的关系[J]. 地理科学,1997,17(4):323~328.
[19] 郑朝贵,朱诚,高华中,等.南京江北地区晚更新世末期以来泥炭层δ13C记录的古气候变化[J].地理科学,2006,26(3):328~334.
[20] 吴江滢,邵晓华,汪永进.南京年纹层石笋δ18O记录的冰期气候事件特征[J].地理科学,2007,27(1):75~80.
[21] 谢远云,李长安,王秋良,等.江汉平原近3 000 年来古洪水事件的沉积记录[J].地理科学,2007,27(1):81~84.
[22] 李月丛,许清海,肖举乐,等.中国北方几种灌丛群落表土花粉与植被关系研究[J].地理科学,2007,27(2):205~210.
[23] 朱江玲,刘鸿雁,王红亚.河北坝上地区湖泊沉积物记录的中全新世干旱气候[J].地理科学,2007,27(3):380~384.
[24] 史威,朱诚,王富葆,等.宁镇及宜溧地区全新世中晚期典型沉积相与5 700 a B.P.前后的气候突变事件[J].地理科学,2007,27(4):512~518.
[25] 张新荣,胡克,王东坡.东北地区泥炭表土中植硅体的形态特征[J].地理科学,2007,27(6):831~836.