香溪河库湾春季叶绿素a浓度动态及其影响因子分析
ANALYSIS OF THE SPATIAL AND TEMPORAL CHANGES OF CHLOROPHYLL A CONCENTRATION IN XIANGXI BAY IN SPRING AND ITS IMPACT FACTORS
-
摘要: 2005年3月至4月,对三峡水库香溪河库湾的叶绿素a动态及其与TN、TP等环境因子的关系进行了研究。结果表明,从香溪河库湾下游到上游,叶绿素a存在明显的水平分布。在时间分布上,3月17日暴发一次大规模的水华,4月份水华的暴发有一个明显的平面推移的过程。叶绿素a浓度与TN、TP之间存在着一定的负相关关系,TN与叶绿素a浓度的相关性较显著。香溪河库湾极可能是N限制型水体,而不受P限制。叶绿素a与透明度存在反双曲线关系,与溶解氧呈显著正相关关系。Abstract: The investigations on chlorophyll a of the water body、total nitrogen、total phosphorus and other environmental factorswere carried out at 14 sampling sites of Xiangxi Bay of Three Gorges Reservoir fromMarch to April 2005.We have also analyzedthe spatial and temporal variation of chlorophyll a and its relationship with environmental factors.Chlorophyll a was extracted and measured according to procedures of UNESCO’s spectrometer methods under 750nm,665nm,645nm and 630nm wavelengths.Dissolved oxygen and nutrient data were supplied by the chemical working group of theresearch project. The result showed that fromthe upper reaches to the lower reaches of the Xiangxi Bay,there was evident horizontal variation of chlorophyll a concentrations in the water column.One bloom event occured at March 17th at a very large scale.Then bloom went forward fromthe lower reaches to the upper reaches along with the time in April. In detail,bloom event occurredat April 11th at the sampling sits of group Ⅰ,then about five days later it occurred at the sampling sits of group Ⅱ.Bloom eventoccurred at the sampling sits of group Ⅲbetween April 16th and April 22th,while it occurred at April 22th at the sampling sitsof group Ⅳ.Obviously,ecological factors,including total nitrogen、total phosphorus、water temperature 、transparency and dissolved oxygen,had significant impact on the concentrations of chlorophyll a directly and indirectly. Generally speaking,total phosphorus increased from the lower reaches to the upper reaches of the Xiangxi Bay,while total nitrogen decreased first,then increased. Theresult obtained showed that on the one hand total phosphorus and total nitrogen were enough for the growth of phytoplankton,onthe other hand the ratio of total nitrogen to total phosphorus was very low,which ranged from 0157 to 21114. The relationship between chlorophyll a and total nitrogen、total phosphorus was negative to some extent. The correlation coefficent between chlorophyll a and total nitrogen was higher than that between chlorophyll a and total phosphorus. Considering the distribution of the nutrients and their correlation with the chlorophyll a,total nitrogen was possibly the main limited factor of phytoplankton growth,while total phosphorus.was not the main limited factor of phytoplankton growth. The relationship between chlorophyll a and transparency was a curve of antihyperbola. This result was similar to the research result of the Japan and North America’s experts.The relationship between chlorophyll a and dissolved oxygen was positive. It was due to the increase of oxygen which was releasedduring photosynthesis.
-
Keywords:
- Xiangxi Bay /
- Chlorophyll a /
- Environmental factor /
- Bloom
-
-
[1] Kuang Q J,Hu Z Y,Zhou GJ, et al. Investigation on Phytoplanktonin Xiangxi River Watershed and the Evaluation of Its Water Quality[J]. Journal of Wuhan Botanical Research,2004,22 (6):507-513[况琪军,胡征宇,周广杰,等. 香溪河流域浮游植物调查与水质评价. 武汉植物学研究,2004,22 (6):507-513]
[2] Reynolds C S. The Ecology of Freshwater Phytoplankton [M]. Lon2don:Cambridge University Press. 1984
[3] Wang F Er,LüH C,Chen Y X, et al. Analysis of the spatial andtemporal changes in chlorophyll a concentration in Qiandao Lake andits impact factors [J]. Journal of Zhejiang University (Natural Sci2ence),2004,30(1):22-26 [王飞儿,吕唤春,陈英旭,等. 千岛湖叶绿素a 浓度动态变化及其影响因素分析. 浙江大学学报(自然科学版),2004,30 (1):22-26]
[4] Huang X F. Survey,Observation and Analysis of Lake Ecology [M].Beijing:Standards Press of China. 2000[黄祥飞. 湖泊生态调查观测与分析. 北京:中国标准出版社. 2000]
[5] Liu J K. Advanced Hydrobiology [M]. Beijing: Science Press. 1999[刘建康,高级水生生物学. 北京:科学出版社,1999]
[6] Danielsson A,Cato I,Carman R, et al. Spatial clustering of metals inthe sediments of the Skagerrak/ Kattegat [J]. Applied Geochemistry,1999,14 (6):689-706
[7] Fovell R,Fovell M Y. Climate zones of the conterminous United Statesdefined using cluster analysis [J]. Jounal of Climate,1993, 6 (11):2103-2135
[8] Sharma S. Applied multivariate techniques [M]. New York:Wiley.1996
[9] Ye L,Li D F,Tang T, et al. Spatial distribution of water quality inXiangxi river[J]. Chinese Journal of Applied Ecology,2003,14(11):1959-1962[叶麟,黎道丰,唐涛,等. 香溪河水质空间分布特性研究. 应用生态学报,2003,14(11):1959-1962]
[11] Hu R,Lin Q Q,Duan S S, et al. Distribution of Chlorophyll2a andphosphorus in subtropical reservoirs,south China [J]. Ecological Sci2ence,2002,21(4):310-315[胡韧,林秋奇,段舜山,等. 热带亚热带水库浮游植物叶绿素a 与磷分布的特征. 生态科学,2002,21 (4):310-315]
[12] Luo WS,Tan G. Three Gorges Reservoir Xiangxihe Bay Water qualityprognosis [J]. International Journal Hydroelectric Energy, 2000,18(4):46-48[雒文生,谈戈. 三峡水库香溪河库湾水质预测.水电能源科学,2000,18 (4):46-48]
[13] Kuang Q J,Bi Y H,Zhou GJ, et al. Study on the phytoplankton in theThree Gorges Reservoir before and after sluice and the protection ofwater quality [J]. Acta Hydrobiologica Sinica,2005,29 (4):353-358[况琪军,毕永红,周广杰,等. 三峡水库蓄水前后浮游植物调查及水环境初步分析. 水生生物学报,2005,29(4):353-358]
[14] Xu XQ,Deng GQ,Hui J Y, et al. HeavyMetal Pollution in sedimentfrom the Three Gorge Reservoir Area [J]. Acta Hydrobiologica Sini2ca,1999,23(1):1-10[徐小清,邓冠强,惠嘉玉,等. 长江三峡库区江段沉积物的重金属污染特征. 水生生物学报,1999,23(1):1-10]
[15] Komarkova J,Hejzlar J. Summer maxima of phytoplankton in the Ri2mov reservoir in relation to hydrologic parameters and phosphors load2ing [J]. Arch Hydrobiology,1996,136:217-236
[16] State environmental protection administration of China,Environmentalquality standards for surface water (GB383822002) [M],Beijing:En2vironmental sciences of China Press,2002[国家环境保护总局,地表水环境质量标准(GB383822002),北京:中国环境科学出版社,2002]
[17] Xie P,Xia J,Dou M, et al. Research onto the effects of the middleroute of China’s south2to2north water transfer project on water bloomin the countermeasures Part Ⅰ:An analysis of the key factors gener2ating water bloom in Hanjiang River [J]. Journal of Natural Re2sources,2004,19 (4):418-422[谢平,夏军,窦明,等,南水北调中线工程对汉江中下游水华的影响及对策研究(Ⅰ)-汉江水华发生的关键因子分析. 自然资源学报,2004, 19 (4): 418-422]
[18] Liu H L. The normalized methods for investigation on lake eutrophica2tion. [M].Beijing: Environmental Sciences of China Press,1987 [刘鸿亮,湖泊富营养化调查规范,北京:中国环境科学出版社,1987]
[19] Liu Z S,Wang C S,Ni J Y, et al. Ecological distribution characteris2tics of chlorophyll a in Fuxian Lake [J]. Acta Ecologica Sinica,2003,23(9):1773-1780[刘镇盛,王春生,倪建宇,等. 抚仙湖叶绿素a 的生态分布特征,生态学报,2003,23(9):1773-1780]
计量
- 文章访问数: 882
- HTML全文浏览量: 6
- PDF下载量: 544
下载: