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1.
珠江流域西江支流贺江浮游藻类群落特征及水质分析 总被引：4，自引：2，他引：2
为了解珠江流域西江支流贺江浮游藻类的分布并评价其水质情况,于2013年丰水期和枯水期对贺江的浮游藻类群落结构进行调查和分析,结果表明:调查期间共检出浮游藻类7门130种,其中丰水期7门63种,枯水期5门103种,浮游藻类群落组成以绿藻门、硅藻门和蓝藻门为主,丰水期绿藻门居多,硅藻门次之,藻细胞丰度平均值为2.13×106cells/L;枯水期硅藻门最多,藻细胞丰度平均值为3.71×106cells/L;优势种主要有水华微囊藻、卷曲鱼腥藻、小颤藻、啮蚀隐藻、短小舟形藻、变异直链藻、颗粒直链藻、四尾栅藻、集星藻、小球衣藻和小球藻.RDA分析表明,影响贺江浮游藻类群落分布的主要环境因子是氮、磷营养盐,综合营养状态指数显示贺江处于中营养水平. 相似文献
2.
筑坝改变河流生源要素迁移转化过程及浮游植物群落分布特征,影响河流生态系统结构与功能。为探究梯级筑坝河流浮游植物群落结构特征及其关键驱动因子,2016年丰水期、2018和2021年丰、枯水期在澜沧江开展了浮游植物群落及相关环境要素的调研。本文重点对比分析了丰水期自然河道段和水库浮游植物间的差异,基于广义相加模型(GAM)建立浮游植物与环境要素间的关系,研究发现:丰水期浮游植物生物量显著高于枯水期,丰、枯水期浮游植物群落结构均呈现上游以硅藻门为主,中下游以绿藻门、蓝藻门为主的变化特征。营养盐和水库的水力停留时间(HRT)是导致上、下游浮游植物生物量差异的关键环境要素;总磷、水温和HRT是影响浮游植物群落多样性指数的主要环境要素;总磷、氨氮是影响丰富度指数的关键环境要素。本研究结果有助于深化理解梯级筑坝河流生态环境效应。 相似文献
3.
为了了解赣江细菌群落特征,探讨环境因子对城市河流细菌群落结构组成的影响,本文基于高通量测序分析鄱阳湖流域赣江南昌段2015年4月至2016年3月5个采样点(G1~G5)的细菌群落特征.采用R语言"Vegan"程序包中的"Bioenv"程序、冗余分析方法分析环境因子对河水细菌群落的影响,基于Bayesian统计方法的Source Tracker模型估算南昌城区对赣江细菌群落的改变比例.结果表明:赣江南昌段的优势菌门为放线菌门(Actinobacteria,34.05%)和变形菌门(Proteobacteria,31.59%),其次为厚壁菌门(Firmicutes,15.49%)和拟杆菌门(Bacteroidetes,9.12%);气温和流量是河流细菌群落主要影响因子,其中气温是影响OTU丰度的最佳单参数,影响门丰度的最佳单参数是流量;水文气象条件(气温和流量)对河流细菌群落的影响大于水化学指标,包括营养盐(溶解有机碳、总磷和铵态氮)、水化学离子(HCO_3~-、Cl~-、NO_3~-、SO_4~(2-)、Na~+、K~+和Mg~(2+))和重金属元素(Mn、Cd、Cr、Pb、Cu、As、Ba和Fe).除Proteobacteria外,其余门的细菌相对丰度在5个采样点之间不存在显著差异;Source Tracker模型结果表明南昌城区对赣江细菌群落结构组成的影响为6.33%~34.67%,对赣江南支细菌群落的影响显著高于其他河段;南昌城区对细菌群落的影响较小,主要的影响门类为Proteobacteria. 相似文献
4.
采用高通量测序技术,研究了内蒙古岱海流域入湖河流、湖水及沉积物细菌多样性及群落组成.结果显示,细菌多样性从高到低依次为：沉积物>河流>湖泊.聚类分析表明入湖河流、湖水和沉积物细菌群落可分为明显不同的3支,说明这3种生境中细菌群落结构有较大差异.物种注释结果表明,河流中优势细菌菌群为髌骨细菌（Patescibacteria）、变形菌门（Proteobacteria）、拟杆菌门（Bacteroidetes）和放线菌门（Actinobacteria）;湖水中优势细菌菌群为放线菌门（Actinobacteria）;而沉积物中优势细菌菌群为变形菌门和绿弯菌门（Chloroflexi）.典范对应分析及Monte Carlo检验表明,电导率和悬浮物含量对水体中（河流与湖泊）细菌群落影响显著,二者共解释了细菌群落变化的86.5%;而冗余分析及Monte Carlo检验表明,泥深、磁化率和总有机碳对沉积物中细菌群落影响显著,三者共解释了细菌群落变化的47.9%.近30年来,岱海地区气候变化和人类活动导致湖水咸化,沉积物碳氮指标显著增长.岱海水体及沉积物细菌多样性及群落组成的差异及其主要驱动因子,反映了细菌对这种气候变化和人类活动共同作用的响应. 相似文献
5.
丹江口库区表层沉积物细菌多样性及功能预测分析 总被引：2，自引：0，他引：2
湖泊沉积物微生物是水生态系统的重要组成部分,目前关于丹江口库区沉积物细菌群落和功能研究鲜见报道.于2017年5月对丹江口库区内5个典型生态点位表层沉积物进行采集,采用高通量测序技术对表层沉积物细菌群落组成进行研究,结果表明细菌群落主要由变形菌门(Proteobacteria)、绿弯菌门(Chloroflexi)、拟杆菌门(Bacteroidetes)、疣微菌门(Verrucomicrobia)和硝化螺旋菌门(Nitrospirae)等33个门和318个属组成,具有丰富的群落组成.沉积物细菌群落和理化指标冗余分析(RDA)结果表明,pH值、总磷、有机质和铵态氮含量均能显著影响沉积物细菌群落组成.细菌属分类单元与环境因子Spearman相关分析表明,变形菌门中11个属的细菌与环境因子显著相关,为与环境因子显著相关细菌的主要组成(占47.62%).采用细菌群落功能预测软件PICRUSt(Phylogenetic Investigation of Communities by Reconstruction of Unobserved States)对表层沉积物细菌群落进行分析,结果表明沉积物细菌功能主要涉及能量产生和转换、信号转导机制、氨基酸运输和代谢、细胞壁/细胞膜/膜结构的生物合成等24个基因功能家族,表现出功能上的丰富性.基因功能家族预测基因拷贝数表现为台子山宋岗库心渠首黑鸡嘴. 相似文献
6.
沉水植物叶表附着大量细菌,与沉水植物构成了复杂的共生体系.叶片附着细菌是水生态的重要组成部分,能影响沉水植物自身生长和水体物质循环过程.目前,对于沉水植物多样性对植物叶片附着细菌群落的影响知之甚少.本研究比较了不同沉水植物物种多样性对浮游细菌和叶片附着细菌群落的影响,同时探究不同植物——苦草(Vallisneria natans)、穗状狐尾藻(Myriophyllum spicatum)、微齿眼子菜(Potamogeton maackianus)和黑藻(Hydrilla verticillata)叶片附着细菌的群落结构和多样性特征.结果表明,浮游细菌和叶片附着细菌的群落α多样性和β多样性具有显著差异.与单一植物物种体系相比,高植物物种多样性体系中植物叶片附着细菌群落α多样性较高.在高植物物种多样性体系中,黑藻叶片附着细菌群落的α多样性显著较高而β多样性显著较低,苦草叶片附着细菌群落的α多样性较低.沉水植物叶片附着细菌群落优势菌群属于变形菌门(Proteobacteria)和拟杆菌门(Bacteroidetes).高植物物种多样性体系中苦草的物种共现网络最具模块性.嗜甲基菌(g_Methylophilus)、红杆菌(f_Rhodobacter)、黄杆菌(g_Flavobacterium)是物种共现网络的关键物种.本文研究植物物种多样性对淡水湖泊细菌群落结构的影响,并强调宿主植物对附着细菌群落的重要选择作用,加深对细菌群落在水生植物叶片定殖机制的理解. 相似文献
7.
群体微囊藻附生细菌特性 总被引：1，自引：0，他引：1
附生细菌在微囊藻水华暴发过程中可能发挥了重要作用,但是,缺少关于微囊藻附生细菌特性的研究报道.本文从4种群体微囊藻(铜绿微囊藻、惠氏微囊藻、水华微囊藻和坚实微囊藻)中分离得到了18种附生细菌,分别隶属于六大类群:α-变形菌纲、β-变形菌纲、γ-变形菌纲、放线菌纲、纤维粘网菌纲和黄杆菌纲.BIOLOG板分析显示除了α-变形菌纲中的2种细菌以及放线菌纲中的1种细菌以外,其余细菌都能够利用10种以上的碳源.18种附生细菌中有12种具有趋化性,12种具有疏水性,14种具有自聚能力.除了黄杆菌纲菌株都具有亲水性外,其余5大类群菌株都含有疏水性种类.六大类群中都含有具有趋化性和自聚能力的种类.每种微囊藻中的大多数附生细菌种类都能利用10种以上的碳源,都具有疏水性.每种微囊藻中至少有一组细菌表现出共聚能力.除了水华微囊藻外,其余3种微囊藻中附生细菌的大多数种类都具有趋化性.除了惠氏微囊藻外,其余3种微囊藻的附生细菌中大多数种类都具有自聚能力.结果显示细菌旺盛的代谢潜力、趋化性、疏水性、自聚能力和共聚能力可能有利于附生细菌定殖于微囊藻群体. 相似文献
8.
为了探讨泥炭藓共生细菌和泥炭表层沉积物细菌群落的垂向变化以及它们在湿地生态系统中的作用,对大九湖泥炭湿地泥炭藓植株的不同部位和下伏泥炭沉积物进行了分层采样.利用克隆文库和荧光定量PCR技术对样品中的细菌进行了定性和定量分析.结果表明,尽管细菌的16S rRNA基因拷贝数在同一个数量级(108个拷贝/克样品),并以变形菌和酸杆菌占优势,但细菌群落组成由泥炭藓上部至下部再到泥炭沉积物不同深度存在显著的空间变化.泥炭藓上部以蓝细菌(Cyanobacteria)和a变形菌门(alpha-Proteobacteria)为主,中部则以酸杆菌门(Acidobateria)为主,泥炭藓下部和最表层泥炭以?变形菌门和酸杆菌门为主,地表以下的泥炭样品以酸杆菌门占优势.细菌组成的这种空间分布规律与细菌的生态功能密切相关.泥炭藓上部的蓝细菌通过光合作用与泥炭藓共生.酸杆菌门的细菌一方面能适应泥炭湿地低pH的环境条件,另一方面还在泥炭藓植株的降解及泥炭的形成中发挥重要作用,并可能参与泥炭湿地酸性条件的形成.在泥炭藓不同部位均发现了甲基胞囊菌科(Methylocystaceae)的克隆,暗示甲烷氧化不仅局限于泥炭藓死亡的透明细胞中,而是在泥炭藓的整个植株中均可能存在着活跃的甲烷氧化过程.这一工作对深刻理解和定量研究泥炭地的微生物地球化学过程,特别是甲烷通量以及甲烷循环具有重要意义. 相似文献
9.
洪湖浮游植物群落结构及其与环境因子的关系 总被引：20，自引：4，他引：16
为研究洪湖浮游植物群落结构及其与环境因子的关系,于2008年3月(枯水期)及7月(丰水期)在洪湖进行采样分析。两次采样共鉴定有浮游植物6门46属95种,细胞丰度变化范围为2.00×10~5-284×10~5 cells/L。硅藻为两个季节绝对优势门类,其次为绿藻及蓝藻;主要种属为直链藻、脆杆藻、栅藻等.丰水期与枯水期浮游植物群落结构季节差异较大;在枯水期由于硅藻对水温和光照较好的适应能力使其处于优势门类;丰水期由于其他藻类对营养盐的竞争及水体中硅含量充足使得绿藻等生长同时硅藻能继续保持优势地位。主成分分析表明在洪湖富营养化水平及水体中离子类型、水体中物质组成和污染程度是影响浮游植物生长的三类主要因素;典范对应分析结果表明浮游植物群落结构与水温、溶解氧及悬浮物浓度相关。 相似文献
10.
采用FISH技术对2008年冬、夏两季太湖梅梁湾水体中细菌优势种群的丰度进行了对比分析。实验中,选取荧光素标记的特异寡核苷酸探针,与太湖梅梁湾水体中的四类细菌优势种群α-变形菌(α-proteobacteria),β-变形菌(β-proteobacteria),γ-变形菌(γ-proteobacteria)和拟杆菌(Bacteroidetes)进行原位杂交。结果表明:①所测定的四类细菌优势种群占总细菌的比例在冬季均显著高于夏季(P0.01);②水体中α-proteobacteria的丰度随TP浓度的增加而显著增加(R~2=0.860,P0.01);③随着Chl.a浓度的增加,水体中细菌的丰度呈上升的趋势,尤其是其中的γ-proteobacteria,其增大趋势更加显著(R~2=0.857,P0.01);④细菌种群的丰度受水体中PO_4~(3-)浓度的影响,尤其是对Bacteroidetes的影响更加显著(R~2=0.733,P0.05)。 相似文献
11.
Wei-Jun Cai Xianghui Guo Chen-Tung Arthur Chen Minhan Dai Longjun Zhang Weidong Zhai Steven E. Lohrenz Kedong Yin Paul J. Harrison Yongchen Wang 《Continental Shelf Research》2008
In this paper, general relationships of riverine bicarbonate concentrations and fluxes as a function of drainage basin mineral content and runoff are examined using a database of the 25 largest rivers in the world. Specific HCO3− flux normalized to unit basin area, which peaks in the mid latitudes, was found to be strongly correlated with the carbonate mineral content of river basins, while river HCO3− concentration was related to the balance of precipitation and evaporation. Within this global context, the weathering patterns of CO2 in a few large rivers (Changjiang, Huanghe, Pearl, and Mississippi rivers) were examined in further detail. The Zhujiang (Pearl River), especially its largest branch (Xijiang), was characterized by the highest specific weathering rate among all the world's large rivers due to an exceptionally high carbonate mineral content (over 80%) in its drainage basin and its warm and wet environment. It has a moderate level of HCO3− concentration, however, due to dilution by relatively high precipitation in the watershed. In stark contrast, the Huanghe (Yellow River) has one of the lowest specific weathering rates because of low carbonate mineral content and a dry climate. However, it has a high HCO3− concentration due largely to the concentrating effects of high evaporative water loss, as a result of arid weather and the agricultural use of water through irrigation systems, as well as carbonate-containing surficial deposits (i.e., loess). The strong correlation between specific HCO3− fluxes and discharge in all four rivers with different discharge seasonality suggests that higher precipitation in drainage basins promotes higher weathering rates. 相似文献
12.
In the Pearl River Delta (PRD), river water quality deteriorates continually due to the population increase and ongoing industrialization and urbanization. In this study, a water quality management paradigm based on the seasonal variation is proposed. For better exploring the seasonal change of water quality, wavelet analysis was used to analyze the division of dry and wet seasons in the PRD during 1952–2009. Then water quality seasonal variation in 2008 and relevant impact factors were analyzed by multivariate statistic methods as a case to make some management measures. The results show that there are some differences of dry and wet seasons division among different years. Wet season mainly appear from April to September, which occupy the largest proportion among the 58 years (about 70%) and then followed by the wet season from May to October (about 13.8% of the total years). As to the water quality of 2008, significant differences exist between dry and wet seasons for 17 water quality parameters except TP, , Fe2+, and Zn2+. Levels of parameters pH, EC, CODMn, BOD5, , , and Cl? in dry season are much higher than those in wet season. In dry season the variations of river water quality are mainly influenced by domestic sewage, industrial effluents, and salt water intrusion. While in wet season, except the aforementioned pollution sources, drainages from cultivated land and livestock farm are also the main factors influencing water pollution. Thus, water quality management measures are proposed in dry and wet seasons, respectively. The results obtained from this study would further facilitate water quality protection and water resources management in the PRD. 相似文献
13.
《Limnologica》2016
The Senegal River is of intermediate size accommodating at present about 3.5 million inhabitants in its catchment. Its upstream tributaries flow through different climatic zones from the wet tropics in the source area in Guinea to the dry Sahel region at the border between Senegal and Mauritania. Total suspended matter, particulate and dissolved organic carbon and nitrogen as well as nutrient concentrations were determined during the dry and wet seasons at 19 locations from the up- to downstream river basin. The aims of the study were to evaluate the degree of human interference, to determine the dissolved and particulate river discharges into the coastal sea and to supply data to validate model results. Statistical analyses showed that samples from the wet and dry season are significantly different in composition and that the upstream tributaries differ mainly in their silicate and suspended matter contents. Nutrient concentrations are relatively low in the river basin, indicating low human impact. Increasing nitrate concentrations, however, show the growing agriculture in the irrigated downstream areas. Particulate organic matter is dominated by C4 plants during the wet season and by aquatic plankton during the dry season. The total suspended matter (TSM) discharge at the main gauging station Bakel was about 1.93 Tg yr−1 which is in the range of the only available literature data from the 1980s. The calculated annual discharges of particulate organic carbon (POC), dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) are 55.8 Gg yr−1, 54.1 Gg yr−1, and 5.3 Gg yr−1, respectively. These first estimates from the Senegal River need to be verified by further studies. 相似文献
14.
The Pearl River Estuary is a subtropical estuary and the second largest in China based on discharge volume from the Pearl River. Processes in the estuary vary spatially and temporally (wet vs dry season). In the dry season at the head of the estuary, hypoxic and nearly anoxic conditions occur and NH4 reaches >600 μM, NO3 is ∼300 μM and nitrite is ∼60 μM indicating that nitrification and denitrification may be important dry season processes in the region extending 40 km upstream of the Humen outlet. There are very few biological studies conducted in this upper section of the estuary in either the dry or wet seasons and hence there is a need for further research in this region of the river. In the wet season, the salinity wedge extends to the Hongqimen outlet and oxygen is low (35–80% saturation). Nitrate is ∼100 μM, silicate ∼140 μM; and phosphate is relatively low at ∼0.5 μM, yielding an N:P ratio up to ∼200:1 in summer. Nutrients decrease in the lower estuary and primary productivity may become potentially P-limited. Eutrophication is not as severe as one would expect from the nutrient inputs from the Pearl River and from Hong Kong's sewage discharge. This estuary shows a remarkable capacity to cope with excessive nutrients. Physical processes such as river discharge, tidal flushing, turbulent dispersion, wind-induced mixing, and estuarine circulation play an important role in controlling the production and accumulation of algal blooms and the potential occurrence of hypoxia. Superimposed on the physical processes of the estuary are the chemical and biological processes involved in the production of the bloom. For example, the 100N:1P ratio indicates that P potentially limits the amount of algal biomass (and potential biological oxygen demand) in summer. While extended periods of hypoxia are rare in Hong Kong waters, episodic events have been reported to occur during late summer due to factors such as low wind, high rainfall and river discharge which result in strong density stratification that significantly dampens vertical mixing processes. Nutrient loads are likely to change over the next several decades and monitoring programs are essential to detect the response of the ecosystem due to the future changes in nutrient loading and the ratio of nutrients. 相似文献
15.
为了解太湖流域上游支流水体的营养状态特征及流域附近土地利用对水质的影响,选取了入湖水系西苕溪的10条主要支流进行了野外采样和实验室研究.研究结果表明,支流总磷(TP)、颗粒磷(PP)、总溶解性磷(TDP)、总氮(TN)、铵态氮(NH+4-N)、硝态氮(NO-3-N)含量季节间差异较大,TP含量范围为0.033~0.205 mg/L,PP含量范围为0.007~0.104 mg/L,TN含量范围为2.014~5.921 mg/L,NH+4-N含量范围0.021~1.659 mg/L,NO-3-N含量范围1.082~3.415mg/L,COD范围为6.5~15.5 mg/L.总体上呈现为枯水期平水期丰水期.部分支流受到不同程度的氮污染.利用水质参数进行聚类分析,可以将10条支流分成4类,其水体营养特征与周围环境相联系.支流营养盐、COD的通量明显受流量控制,表现为丰水期平水期枯水期.土地利用类型的差异是导致其水质变化的主要原因,耕地和居民地主要起源的作用,林地和草地主要起汇的作用.在丰水期和枯水期,对各指标影响最大的土地利用类型为耕地和林地;在平水期,对TP影响最大的是居民地,而对TN影响最大的是林地. 相似文献
16.
土地利用结构与景观格局对鄱阳湖流域赣江水质的影响 总被引：4，自引：0，他引：4
于2015年1月和7月采集赣江干流及支流34个采样点水样,测定电导率、水化学离子、无机氮等水质指标.利用赣江流域2014年30 m分辨率的土地利用数据,以流域景观类型占比表征土地利用结构,景观指数表征景观格局;采用Pearson相关分析、Bioenv分析、Mantle检验与方差分解等方法分析流域土地利用结构与景观格局对赣江水质的影响.结果表明:上游Cl~-、Na~+浓度最高,中游电导率、Cl~-、Na~+、K~+、Ca~(2+)等水质指标最低,下游电导率、HCO_3~-、SO_4~(2-)、Mg~(2+)、Ca~(2+)、NO_3~--N等水质指标最高.居民建设用地是对水质影响最显著的单一土地利用类型.林地、水田与居民建设用地是对水质影响最显著的土地利用类型组合.平均最近邻体指数是对水质影响最显著的单一景观指数,斑块个数、斑块聚集度指数、平均最近邻体指数是对水质影响最显著的景观指数组合.枯水期土地利用结构和景观格局对水质的贡献率分别为41.1%和17.2%,景观格局对水质的贡献率(17.2%)均为和土地利用结构的交互作用,无独立贡献部分;丰水期二者对水质贡献率分别为51%、53%,交互作用部分为37%.以上结果表明,土地利用结构与景观格局都对赣江水质有较大影响,二者的交互作用在该影响中占有重要地位,且枯水期景观格局对水质的影响涵盖在与土地利用结构的交互作用中. 相似文献
17.
淮北临涣矿采煤沉陷区不同水体水化学特征及其影响因素 总被引：3，自引：0，他引：3
为研究淮北临涣矿采煤沉陷区不同水体的补给水源及溶质来源,在现场调查的基础上,系统采集丰水期、平水期、枯水期沉陷区积水、地表河水和浅层地下水样进行测试分析,采用Piper三线图、Gibbs图和因子分析方法,对不同水体水化学特征及其影响因素进行讨论.结果表明:地表水水体总溶解性固体(TDS)质量浓度表现为枯水期丰水期平水期,浅层地下水表现为枯水期平水期丰水期,地表水TDS质量浓度明显高于浅层地下水.地表水中主要阴阳离子为Na~+、Cl~-和SO_4~(2-),水化学类型主要为SO_4~(2-)-Cl~--Na~+型;浅层地下水离子以HCO_3~-、Ca~(2+)和Mg~(2+)为主,表现为HCO_3~--Ca~(2+)-Mg~(2+)型.结合Gibbs图和因子分析可知,地表水受蒸发作用、地表径流以及采煤活动等因素影响,浅层地下水在一定程度上体现出大气降水和地表水补给的特点,受岩石风化作用影响较为明显. 相似文献
18.
Ping-Ping ShenGang Li Liang-Min HuangJian-Lin Zhang Ye-Hui Tan 《Continental Shelf Research》2011,31(16):1672-1681
The Pearl River Estuary is among the largest estuaries in the subtropical areas of the world. Along the salinity and turbidity gradient between the freshwater reach of the Pearl River and the marine water of the South China Sea, the spatial and temporal composition and abundance of phytoplankton was examined in relation to physic-chemical variables during the dry and wet seasons of 2009. Water samples for phytoplankton and environmental parameters were collected from 18 stations during two seasons along a transect from upper estuary to estuarine and marine sectors. A total of 162 species belonging to 7 phyla were identified, with diatoms dominated in both seasons while dinoflagellates proliferated in autumn. Two main clusters and three sub-clades under each main cluster corresponding to seasons and water sectors were defined with multivariate analysis (cluster and nMDS). Based on the species composition and abundance of phytoplankton, both seasonal and spatial variability were observed at a significant level (ANOSIM: season effect, R=0.896, P<0.01; station effect, R=0.463, P<0.01). The correlation analysis between biotic and abiotic variables indicated that instead of the “proverbial” anthropogenic nutrients loading and salinity gradient, the best 2-variable combination (temperature and turbidity) showed a significant effect on the pattern of phytoplankton assemblages (ρw=0.49, BIOENV analysis) between wet and dry seasons in the Pearl River Estuary. This result suggests that physical disturbance either natural or manmade is a more important factor in regulating the phytoplankton community structure within the hydrologically distinct zone of estuaries. 相似文献
19.
以艾比湖流域主要入湖河流为研究对象,在5月（丰水期）和8月（枯水期）分别沿博尔塔拉河（博河）和精河进行采样,采用平行因子模型（PARAFAC）和三维荧光区域积分法对水体三维荧光特性进行研究并对其与水质的关系在枯、丰水期下的变化进行探讨.结果表明①河流DOM在枯水期与丰水期都含有C1（240、425 nm） UVC类腐殖质,C2（225、290 nm）紫外区内络氨酸类有机物,C3（230/280、330 nm）蛋白类有机物,C4（265、260 nm）腐殖质类共4种组分.通过对水体三维荧光进行区域积分可以看出DOM荧光成分的占比在不同时期的变化.博河在枯水期时EEM光谱中的区域Ⅲ富里酸含量低于丰水期,枯水期时区域Ⅱ芳香类蛋白质、区域Ⅳ可溶性微生物代谢物以及区域Ⅴ类腐殖质酸高于丰水期;对于精河来说,区域Ⅱ芳香类蛋白质和区域Ⅳ可溶性微生物代谢物在枯水期的含量高于丰水期,区域Ⅲ富里酸和区域Ⅴ类腐殖质酸的含量枯水期低于丰水期,这表明水体腐质化程度较高.②本研究选取了一些常规的荧光指数来描述枯、丰水期水体的荧光指数特性.经研究发现,精河的荧光指数、自生源指数和腐殖化指数在不同时期的变化幅度较小,而博河的变化幅度较大.③将荧光指数与水质参数进行相关性分析并建模,结果表明枯水期自生源指数（BIX）与化学需氧量呈显著正相关,相关系数R=0.688;丰水期时BIX与铵态氮浓度呈显著负相关,相关系数R=-0.493.通过对比分析艾比湖主要入湖河流的三维荧光光谱特性与水质在枯、丰水期时的关系进一步表明水体中DOM的特性以及在枯、丰水期下的差异,为艾比湖流域的治理改善提供一定的理论支持和参考依据. 相似文献