基于湖积物硅藻与地球化学记录的古环境变迁反演——以桂林会仙岩溶湿地为例

汪良奇; 张 强; 萧良坚; 扈治安; 李红春; 谢运球

基于湖积物硅藻与地球化学记录的古环境变迁反演——以桂林会仙岩溶湿地为例

1.
中国地质科学院岩溶地质研究所/国土资源部岩溶生态系统与石漠化治理重点实验室；德国哥廷根大学植物科学所
2.
中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心
3.
台湾中央研究院地球科学研究所
4.
台湾大学地质科学系
5.
中国地质科学院岩溶地质研究所/国土资源部岩溶生态系统与石漠化治理重点实验室

基金项目: 国土资源部岩溶生态系统与石漠化治理重点实验室开放课题“桂林会仙岩溶湿地全新世环境变迁研究”（KERDC-201301）;国家自然科学基金（41102118）;国科会计划（NSC101-2116-M-002-007-, NSC101-2611-M-110-003-, NSC102-2917-I-564-058）

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出版历程
- 收稿日期: 2014-02-28
- 发布日期: 2014-06-25

Paleoenvironmental changes inferred from diatom and geochemistry records of lake deposits: A case study in Huixian karst wetland, Guilin

1.
Institute of Karst Geology, CAGS / Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, MLR；Albrecht-von-Haller Institute for Plant Sciences, University of G?ttingen
2.
Institute of Karst Geology, CAGS/Karst Dynamics Laboratory, MLR & GZAR / International Research Center on Karst under the Auspices of UNESCO
3.
Institute of Earth Sciences, Academia Sinica
4.
Department of Geosciences, National Taiwan University
5.
Institute of Karst Geology, CAGS / Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, MLR

摘要

摘要: 通过对狮子潭柱状沉积物的放射性定年、地球化学与硅藻分析，反演桂林会仙岩溶湿地全新世的古湖沼演替，与其响应的气候变迁与人类活动记录。放射性210Pb、14C定年结果显示该湖在6 400 cal BP开始有湖积物保存，在2 700 cal BP-公元1943年间有沉积间断事件，且于公元1943年再度沉积。在6 400-5 200 cal BP，高比例的浮游型硅藻反映高水位状态，可对应到气候暖湿的中国全新世大暖期鼎盛期。在5 200-2 700 cal BP，沉积物内稀酸可溶相Ca、Mg、Sr 浓度降低，Mg/Ca、Sr/Ca值明显增加，且浮游型硅藻几乎消失，显示当时湖泊水位显著降低，气候逐渐变干。在公元1943年沉积物再度沉积，可能与战争造成人口迁徙与废耕有关。自公元1973年以来，硅藻壳片大量堆积，反映人类过度活动造成藻华的现象。湖泊沉积物内硅藻组成及沉积物的地球化学特征能够很好地反演古气候、环境变迁。
- 沉积物 /
- 多指标分析 /
- 硅藻 /
- 全新世 /
- 岩溶湿地 /
- 稀酸可溶相元素
Abstract: The Holocene paleolimnological variations in Huixian karst wetland, Guilin, and the climate changes as well as human activities that they reflect, have been reconstructed using multiproxies, including radioactive dating, geochemical proxy, and diatom analysis of a sediment core from Shizitan Lake. During 6 400-5 200 cal BP, high percentages of planktonic diatoms indicated higher water levels, corresponding to a warm and humid climate during the Holocene Optimum. During 5 200-2 700 cal BP, the decline of weak acid leachable Ca, Mg, Sr, and the increase of Mg/Ca, Sr/Ca ratios, associated with low percentages of planktonic diatoms inferred a marked decline in water levels and drier climate. The re-accumulation of lake sediments in A.D. 1943 may correlate to significant population shifts during World War 2. The numerous deposits of diatom valves since A.D. 1973, showed algal blooms as a consequence of intense human impacts.
- sediment /
- multiproxy /
- diatom /
- Holocene /
- karst wetland /
- weak acid leachable elements

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参考文献(21)

[1]	马祖陆, 蔡德所, 蒋忠诚. 岩溶湿地分类系统研究［J］. 广西师范大学学报(自然科学版),2009, 27(2):101-106.
[2]	李世杰, 蔡德所, 张宏亮, 等. 桂林会仙岩溶湿地环境变化沉积记录的初步研究［J］. 广西师范大学学报(自然科学版),2009, 27(2):94-100.
[3]	沈德福, 李世杰, 蔡德所, 等. 桂林岩溶湿地沉积物地球化学元素变化的环境影响因子分析［J］. 高校地质学报,2010, 16(4):517-526.
[4]	Bigler C, Hall R I. Diatoms as quantitative indicators of July temperature: a validation attempt at century-scale with meteorological data from northern Sweden［J］. Palaeogeography, Palaeoclimatology, Palaeoecology,2003, 189:147-160.
[5]	Birks H J B, Line J M, Juggins S, et al. Diatoms and pH reconstruction［J］. Philosophical Transactions of the Royal Society B: Biological Sciences,1990, 327:263-278.
[6]	Brugam R B, McKeever K, Kolesa L. A diatom-inferred water depth reconstruction for an Upper Peninsula, Michigan, lake［J］. Journal of Paleolimnology,1998, 20(3):267-276.
[7]	蔡德所, 马祖陆, 赵湘桂, 等. 桂林会仙岩溶湿地近40年演变的遥感监测［J］. 广西师范大学学报(自然科学版), 2009, 27(2):111-117.
[8]	余龙江, 李为, 栗茂腾, 等. 西南岩溶生态系统脆弱性的生物学诊断及其治理的生物技术措施［J］. 地球科学进展,2006, 21(3):228-234.
[9]	吴应科, 莫源富, 邹胜章. 桂林会仙岩溶湿地的生态问题及其保护对策［J］. 中国岩溶,2006, 25(1):85-88.
[10]	李晖, 尹辉, 蒋忠诚, 等. 典型岩溶区石漠化和土壤侵蚀遥感解译与关键问题［J］. 广西师范大学学报(自然科学版),2013, 31(2): 133-139.
[11]	Wang L C, Lee T Q, Chen S H, et al. Diatoms in Liyu Lake, Eastern Taiwan［J］. Taiwania,2010, 55(3):228-242.
[12]	Grimm E. TILIA: a pollen program for analysis and display, III［R］. Springfield: Illinois State Museum,1993.
[13]	Juggins S. The European diatom database user guide, Version 1.0［R］. Newcastle: Newcastle University, 2001.
[14]	Birks H J B, Birks H J, Frey D G , et al. Deevey Review 1: Numerical tools in palaeolimnology - progress, potentialities, and problems［J］. Journal of Paleolimnology,1998, 20(4):307-332.
[15]	Wang L C, Behling H, Lee T Q, et al. Increased precipitation during the Little Ice Age in northern Taiwan inferred from diatoms and geochemistry in a sediment core from a subalpine lake［J］. Journal of Paleolimnology,2013, 49(4):619-631.
[16]	Shear H, Nalewajko C, Bacchus H M. Some aspects of the ecology of Melosira spp. in Ontario Lakes［J］. Hydrobiologia,1976, 50(2):173-176.
[17]	周文亮, 姜光辉, 陈国富, 等. 桂林硝盐洞滴水水文和水化学动态变化特征［J］. 中国岩溶,2013, 32(1):51-56.
[18]	王晓晓, 徐尚全, 沈立成. 雪玉洞岩溶地下水, 地表水 Ca2+, Mg2+, Sr2+ 变化特征研究［J］. 中国岩溶,2013, 32(1):43-50.
[19]	Li H C, Bischoff J L, Ku T L, et al. Climate variability in east-central California during the past 1000 years reflected by high- resolution geochemical and isotopic records from Owens Lake sediments［J］. Quaternary Research,2000, 54(2):189-197.
[20]	施雅风, 孔昭宸, 王苏民,等. 中国全新世大暖期的气候波动与重要事件［J］. 中国科学 B 辑,1992, 22(12):1300-1308.
[21]	何元庆, 姚檀栋, 沈永平, 等. 冰芯与其它记录所揭示的中国全新世大暖期变化特征［J］. 冰川冻土,2003, 25(1):11-18.