青海东部史前人口-耕地变化及其对植被演变的影响
作者简介:侯光良(1972-),男,青海大通县人,博士,主要从事气候变化及其影响与适应研究。E-mail:hgl20@163.com
收稿日期: 2012-02-18
要求修回日期: 2012-10-08
网络出版日期: 2013-01-31
基金资助
国家自然科学基金(41161018)、教育部人文社会科学研究青年基金项目(10YJCZH041)资助
Prehistoric Population and Cultivated Land Change in the Eastern Qinghai Province and Its Environmental Effects
Received date: 2012-02-18
Request revised date: 2012-10-08
Online published: 2013-01-31
Copyright
集成青海东部考古数据和DEM,利用面积和墓葬相结合的估算法计算了区域史前人口数量,并利用GIS工具重建史前区域耕地面积的时空格局。结果表明:新石器马家窑文化时期区域人口、耕地迅速增加,并在晚期马厂时期达到新石器的顶峰,人口总数接近4万人,耕地面积达到462 km2,人口和耕地主要分布在黄河—湟水谷地内;齐家时期人口和耕地有一定幅度下降,在青铜时代人口和耕地有显著回升和增长,人口总数达61 000余人,耕地面积达到1 076 km2,约占区域适宜耕地总数的1/10。伴随人口与耕地的变化,人类活动的环境效应也逐步显现,5~4 ka B.P.人类活动导致研究区河谷地带乔木的减少,伴人植物增加,尤其是禾本科含量有较大幅度增加,与当时的粟作农业关系密切;4 ka B.P.后大范围的乔木减少是气候变化结果,其后人类活动加强,加速了乔木覆被面积的萎缩。
侯光良 , 魏海成 , 1,2 sup 赵小浩 sup 1 sup , ZHAO Xiao-hao . 青海东部史前人口-耕地变化及其对植被演变的影响[J]. 地理科学, 2013 , 33(3) : 299 -306 . DOI: 10.13249/j.cnki.sgs.2013.03.299
Integrated the archaeological and DEM data in the eastern Qinghai Province, using a combination of the area archaeological site and burials to estimate the regional prehistoric population, and apply the GIS tools to rebuild the regional cultivated land area of the prehistoric period for time and space. The results showed that regional population and cultivated land increased rapidly during the Majiayao culture of Neolithic Period, and the population had reached the peak during the late Machang culture regional of Neolithic period,in which the population had totally risen up to about 40×103 and the size of farm land was expanded to 462 km2. The population and the farm land were mainly distributed in the valley area of the Huanghe River-Huangshui River. The population and farm land were decreased significantly during the Qijia culture period, but it was rebounded obviously during the bronze age, in which total population increased to 61 000 and the farm land was expanded to 1 076 km2, about 1/10 of the total arable land area in the region. With the changes of population and farm land, the influence of human activities on the environment began to appear. In 5-4ka B.P., human activities lead to the reduction of the arbor in the study area, the increase of Androphile, especially Gramineae have sharply increased, as agriculture is closely related with the millet. After 4 ka B.P., a shape reduce of the arbor is due to the change of climate, while strengthening of human activities accelerated the shrinking arbor cover area.
Key words: prehistoric; population; cultivated land; environmental effects; vegetation change
Fig.1 Location of study area图1 研究区概图 |
Table 1 The population of various cultural periods in the burial sites of the eastern Qinghai表1 青海东部各个文化时期的典型遗址墓葬人口数量 |
文化类型 | 典型遗址 | 活动时间(cal ka B.P.) | 统计人骨数(人) | 人均寿命(岁) | 估算常住人口(人) | 文献来源 |
---|---|---|---|---|---|---|
马家窑文化马家窑类型 | 民和核桃庄 | 5~4.5 | 179 | 30 | 35 | [22] |
马家窑文化半山类型 | 民和阳山 | 4.5~4.3 | 215 | 32.96 | 36 | [23] |
马家窑文化马厂类型 | 乐都柳湾 | 4.3~4 | 890 | 37.42 | 70 | [24] |
齐家文化 | 贵南尕马台 | 4~3.6 | 53 | 34.06[20] | 53 | [25] |
辛店文化 | 民和核桃庄 | 3.4~2.6 | 71 | 27.48 | 70 | [22] |
卡约文化 | 大通上孙家寨 | 3.6~2.6 | 1077 | 27.48[18] | 34 | [26] |
Table 2 Classification standard of farm land表2 适宜耕地分级标准 |
类型 | 分级 | 赋值 | 类型 | 分级 | 赋值 |
---|---|---|---|---|---|
土壤 | 可耕作土壤(粟钙土、灰钙土) | 1 | 坡度 | 0º~10º | 1 |
不可耕作土壤(高山荒漠土、棕漠土等) | 0 | 10º~20º | 0.5 | ||
河流 | 距离河流≤3 km | 1 | >20º | 0 | |
距离河流>3 km | 0 | 海拔 | 0~2000 m | 2 | |
朝向 | 0º~45º | 0 | 2000~2800 m | 1 | |
45º~225º | 1 | >2800 m | 0 | ||
225º~360º | 0 |
注:0为不适宜耕作,赋值大则适宜耕作。 |
Table 3 The prehistoric population and farm land in the eastern Qinghai表3 青海东部史前时期人口-耕地表 |
文化类型 | 遗址平均人口 规模(人) | 人口总数 (人) | 遗址理论耕地 面积(m2) | 遗址耕地 半径(m) | 理论耕地 面积(km2) | 史前耕地 面积(km2) | |
---|---|---|---|---|---|---|---|
马家窑文化(新石器文化) | 马家窑类型 | 35 | 9900 | 560000 | 422 | 158 | 149 |
半山类型 | 36 | 3708 | 576000 | 428 | 59 | 25 | |
马厂类型 | 70 | 39200 | 1120000 | 597 | 627 | 462 | |
齐家文化(铜石并用) | 53 | 22790 | 848000 | 519 | 364 | 330 | |
卡约文化(青铜文化) | 34 | 54400 | 326400 | 322 | 1297 | 1076 | |
辛店文化(青铜文化) | 70 | 6930 | 1120000 | 534 | 80.64 | 77 |
Fig.2 The pattern of spatial and temporal variation of prehistoric farm land in Northeastern margin of Tibetan Plateau图2 青海东部史前耕地格局时空变化 |
Fig.3 Pollen records and human activities in the northeastern margin of Qinghai-Tibet Plateau图3 青海东部花粉记录与人类活动 |
The authors have declared that no competing interests exist.
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