Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/RDC.2017.127 |
INFLUENCE OF AQUATIC PLANT PHOTOSYNTHESIS ON THE RESERVOIR EFFECT OF GENGGAHAI LAKE, NORTHEASTERN QINGHAI-TIBETAN PLATEAU | |
Li, Yuan1; Qiang, Mingrui1; Jin, Yanxiang2; Liu, Li1; Zhou, Aifeng1; Zhang, Jiawu1 | |
通讯作者 | Qiang, Mingrui |
来源期刊 | RADIOCARBON |
ISSN | 0033-8222 |
EISSN | 1945-5755 |
出版年 | 2018 |
卷号 | 60期号:2页码:561-569 |
英文摘要 | Terrestrial plant remains in the sediments of lakes from semi-arid and arid regions are rare and therefore the establishment of a sediment chronology depends on accurate assessment of the reservoir effect of the lake water. In a study of Genggahai Lake in the Gonghe Basin, northeastern Qinghai-Tibetan Plateau, we used accelerator mass spectrometry radiocarbon (AMS C-14) dating to determine the age of (1) dissolved inorganic carbon in the water (DICLW), (2) macrophyte remains in the uppermost samples of core sediments, (3) living P. pectinatus in the lake, and (4) dissolved inorganic carbon of spring water in the catchment. The results show that the ages of the DICLW (910 C-14 yr BP on average) were much younger than the ages of the groundwater (6330 C-14 yr BP on average), which may result mainly from CO2 exchange between the lake water and the atmosphere. In addition, the C-14 ages of DICLW and macrophyte remains in the uppermost core sediments varied from site to site within the lake, which we ascribe to the different photosynthesis rates of Chara spp. and vascular plants. The higher photosynthesis rate of Chara spp. decreases lake-water pCO(2), which leads to more atmospheric CO2 being absorbed by the lake water, and thereby greatly reducing the age of carbon species in areas dominated by Chara spp. Although Genggahai Lake is well mixed, the differences between the apparent ages of the lake water are significantly modulated by the photosynthesis intensity of submerged plants. |
英文关键词 | charophyte China dissolved inorganic carbon radiocarbon dating reservoir effect |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000430929600014 |
WOS关键词 | TEMPORAL-CHANGES ; STABLE ISOTOPES ; OXYGEN-ISOTOPE ; SEDIMENTS ; AGE ; CLIMATE ; RECORD ; BASIN ; RATIO |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/212538 |
作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China; 2.Qinghai Normal Univ, Coll Geog Sci, Xining 810008, Qinghai, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Yuan,Qiang, Mingrui,Jin, Yanxiang,et al. INFLUENCE OF AQUATIC PLANT PHOTOSYNTHESIS ON THE RESERVOIR EFFECT OF GENGGAHAI LAKE, NORTHEASTERN QINGHAI-TIBETAN PLATEAU[J]. 兰州大学,2018,60(2):561-569. |
APA | Li, Yuan,Qiang, Mingrui,Jin, Yanxiang,Liu, Li,Zhou, Aifeng,&Zhang, Jiawu.(2018).INFLUENCE OF AQUATIC PLANT PHOTOSYNTHESIS ON THE RESERVOIR EFFECT OF GENGGAHAI LAKE, NORTHEASTERN QINGHAI-TIBETAN PLATEAU.RADIOCARBON,60(2),561-569. |
MLA | Li, Yuan,et al."INFLUENCE OF AQUATIC PLANT PHOTOSYNTHESIS ON THE RESERVOIR EFFECT OF GENGGAHAI LAKE, NORTHEASTERN QINGHAI-TIBETAN PLATEAU".RADIOCARBON 60.2(2018):561-569. |
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