长潭水库沉积物色素剖面分布及其环境意义
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摘要
通过对长潭水库沉积物柱芯剖面色素、有机质、总氮和总磷的分析,结合现状水生态监测数据和近50年气候变化数据,揭示了长潭水库营养状态演替及初级生产力变化过程,探讨了人类活动和气候变化对长潭水库初级生产力和藻类演替的驱动作用.结果表明:长潭水库营养状态经历了稳定期、缓慢增长期和快速增长期3个阶段演替过程;沉积物色素剖面浓度也呈现3个阶段上升趋势,藻类由甲藻、硅藻为优势种逐渐演化为蓝藻、绿藻为优势种.外源氮磷输入增加和建库导致的水动力条件变化驱动了长潭水库初级生产力的增加和藻类种群的演替;近50年气候变化加速了水库藻类群落的演替,藻类的优势种演变为对温度敏感的蓝藻拉式拟柱孢藻.本文研究结果可为历史水生态资料缺乏水库的水生态演替识别和生态安全评估提供可借鉴的方法支撑.
Profile distribution of pigments,organic matter,total nitrogen and total phosphorus were investigated in sediment cores of Changtan Reservoir.Combined with current water ecological monitoring data and climate change data for the last 50 years,the trophic state succession and primary productivity change process were revealed. The effects of human activities and climate change on primary productivity and algae succession have been discussed. The trophic state has experienced stable,slow increase and rapid increase stages. The variation trend of sediment pigments was consistent with trophic state.The predominant species of algae gradually evolved from dinoflagellates and diatoms into cyanobacteria and green algae. The change of hydrodynamic conditions due to dam construction and the growth of N and P input result in the increase of primary productivity and the succession of algae community. In the recent 50 years,climate change accelerated the succession of algae community,and dominant species of algae evolved into temperature-sensitive Cylindrospermopsis raciborskii. This study can provide a reference for the identification of water ecological succession and ecological security assessment in the reservoir without water ecological data.
Profile distribution of pigments,organic matter,total nitrogen and total phosphorus were investigated in sediment cores of Changtan Reservoir.Combined with current water ecological monitoring data and climate change data for the last 50 years,the trophic state succession and primary productivity change process were revealed. The effects of human activities and climate change on primary productivity and algae succession have been discussed. The trophic state has experienced stable,slow increase and rapid increase stages. The variation trend of sediment pigments was consistent with trophic state.The predominant species of algae gradually evolved from dinoflagellates and diatoms into cyanobacteria and green algae. The change of hydrodynamic conditions due to dam construction and the growth of N and P input result in the increase of primary productivity and the succession of algae community. In the recent 50 years,climate change accelerated the succession of algae community,and dominant species of algae evolved into temperature-sensitive Cylindrospermopsis raciborskii. This study can provide a reference for the identification of water ecological succession and ecological security assessment in the reservoir without water ecological data.
引文
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Williamson C E,Saros J E,Vincent W F,et al.2009.Lakes and reservoirs as sentinels,integrators,and regulators of climate change[J].Limnology&Oceanography,54(6part2):2273-2282
Wright S W,Jeffrey S W.2006.Pigment Markers for Phytoplankton Production//Marine Organic Matter:Biomarkers,Isotopes and DNA[M].Springer Berlin Heidelberg:71-104
Wu Q,Qi J,Xia X.2017.Long-term variations in sediment heavy metals of a reservoir with changing trophic states:Implications for the impact of climate change[J].Science of the Total Environment,609(2):242-250
Yan H,Huang Y,Wang G,et al.2016.Water eutrophication evaluation based on rough set and petri nets:A case study in Xiangxi-River,Three Gorges Reservoir[J].Ecological Indicators,69:463-472
Ying X,Gao X,Yan S,et al.2009.A daily temperature dataset over China and its application in validating a RCM simulation[J].Advance in Atmospheric Sciences,26(4):763-772
Zastepa A,Taranu Z E,Kimpe L E,et al.2017.Reconstructing a longterm record of microcystins from the analysis of lake sediments[J].Science of the Total Environment,579:893-901
张振克,吴瑞金.2000.云南洱海流域人类活动的湖泊沉积记录分析[J].地理学报,55(1):66-74
Carey C C,Ibelings B W,Hoffmann E P,et al.2012.Eco-physiological adaptations that favour freshwater cyanobacteria in a changing climate[J].Water Research,46(5):1394-407
Chen D,Hu M,Guo Y,et al.2016.Changes in river water temperature between 1980 and 2012 in Yongan watershed,eastern China:Magnitude,drivers and models[J].Journal of Hydrology,533:191-199
Chen Q,Nie Y,Liu X,et al.2015.An 800-year ultraviolet radiation record inferred from sedimentary pigments in the Ross Sea area,East Antarctica[J].Boreas,44(4):693-705
Deshpande B N,Tremblay R,Pienitz R,et al.2014.Sedimentary pigments as indicators of cyanobacterial dynamics in a hypereutrophic lake[J].Journal of Paleolimnology,52(3):171-184
Guilizzoni P.2011.Use of sedimentary pigments to infer past phosphorus concentration in lakes[J].Journal of Paleolimnology,45(4):433-445
Jiménez L,Viana L R,Porcuna J M C,et al.2015.Sedimentary photosynthetic pigments as indicators of climate and watershed perturbations in an alpine lake in southern Spain[J].Limnetica,29(342):439-454
江涛,丛敏,甘居利,等.2012.高效液相色谱法测定海洋水体与沉积物中光合色素[J].分析化学,40(4):517-522
马千里,胡芳,虢清伟,等.2014.六都寨水库夏季富营养化状况与浮游植物分布特征研究[J].环境科学学报,34(6):1497-1504
Ma W X,Huang T L,Li X,et al.2015.Impact of short-term climate variation and hydrology change on thermal structure and water quality of a canyon-shaped,stratified reservoir[J].Environmental Science&Pollution Research,22(23):18372-18380
Murphy T,Lawson A,Kumagai M,et al.2001 Release of phosphorus from sediments in Lake Biwa[J].Limnology,2:119-128
Paerl H W,Scott J T,Mccarthy M J,et al.2016.It takes two to tango:When and where dual nutrient(N&P)reductions are needed to protect lakes and downstream ecosystems[J].Environmental Science&Technology,50(20):10805-10813
Reuss N,Conley D J,Bianchi T S.2005.Preservation conditions and the use of sediment pigments as a tool for recent ecological reconstruction in four Northern European estuaries[J].Marine Chemistry,95(3/4):283-302
Reuss N,Leavitt P R,Hall R I,et al.2010.Development and application of sedimentary pigments for assessing effects of climatic and environmental changes on subarctic lakes in northern Sweden[J].Journal of Paleolimnology,43(1):149-169
Reynolds C S,Huszar V,Kruk C,et al.2002.Towards a functional classification of the freshwater phytoplankton[J].Journal of Plankton Research,24(5):417-428
Rigosi A,Carey C C,Ibelings B W,et al.2014.The interaction between climate warming and eutrophication to promote cyanobacteria is dependent on trophic state and varies among taxa[J].Limnology&Oceanography,59(1):99-114
Robins P E,Skov M W,Lewis M J,et al.2016.Impact of climate change on UK estuaries:A review of past trends and potential projections[J].Estuarine Coastal&Shelf Science,169:119-135
Shi K,Zhang Y,Xu H,et al.2015.Long-term satellite observations of microcystin concentrations in Lake Taihu during cyanobacterial bloom periods[J].Environmental Science&Technology,49(11):6448-6456
Shi K,Zhang Y,Zhou Y,et al.2017.Long-term MODIS observations of cyanobacterial dynamics in Lake Taihu:Responses to nutrient enrichment and meteorological factors[J].Scientific Reports,7:40326
Swain E B.1985.Measurement and interpretation of sedimentary pigments[J].Freshwater Biology,15(1):53-75
Szymczak-6)Zya M,Kowalewska G,Louda J W.2011.Chlorophyll-a,and derivatives in recent sediments as indicators of productivity and depositional conditions[J].Marine Chemistry,125(1):39-48
Szymczak-6)Zya M,Krajewska M,Winogradow A,et al.2016.Tracking trends in eutrophication based on pigments in recent coastal sediments[J].Oceanologia,59(1):1-17
Tse T J,Doig L E,Leavitt P R,et al.2015.Long-term spatial trends in sedimentary algal pigments in a narrow river-valley reservoir,Lake Diefenbaker,Canada[J].Journal of Great Lakes Research,41:56-66
滕德强.2012.东海赤潮高发区沉积色素分布特征研究[D].广州:暨南大学
Waters M N,Schelske C L,Kenney W F,et al.2005.The use of sedimentary algal pigments to infer historic algal communities in Lake Apopka,Florida[J].Journal of Paleolimnology,33(1):53-71
Williamson C E,Saros J E,Vincent W F,et al.2009.Lakes and reservoirs as sentinels,integrators,and regulators of climate change[J].Limnology&Oceanography,54(6part2):2273-2282
Wright S W,Jeffrey S W.2006.Pigment Markers for Phytoplankton Production//Marine Organic Matter:Biomarkers,Isotopes and DNA[M].Springer Berlin Heidelberg:71-104
Wu Q,Qi J,Xia X.2017.Long-term variations in sediment heavy metals of a reservoir with changing trophic states:Implications for the impact of climate change[J].Science of the Total Environment,609(2):242-250
Yan H,Huang Y,Wang G,et al.2016.Water eutrophication evaluation based on rough set and petri nets:A case study in Xiangxi-River,Three Gorges Reservoir[J].Ecological Indicators,69:463-472
Ying X,Gao X,Yan S,et al.2009.A daily temperature dataset over China and its application in validating a RCM simulation[J].Advance in Atmospheric Sciences,26(4):763-772
Zastepa A,Taranu Z E,Kimpe L E,et al.2017.Reconstructing a longterm record of microcystins from the analysis of lake sediments[J].Science of the Total Environment,579:893-901
张振克,吴瑞金.2000.云南洱海流域人类活动的湖泊沉积记录分析[J].地理学报,55(1):66-74