Plant community complexity in the arid valley of Minjiang River, southwestern China

Biocomplexity theory is becoming increasingly important in understanding natural vegetation dynamics and interrelation among all components of the ecosystem. In this study, based on the field investigation of plant species and environmental factors (altitude, microtopography, soil water content, and soil nutrients) in an arid valley of the upper reaches of Minjiang River, Sichuan Province, southwestern China, plant community complexity and its relationship with environmental factors, community diversity, species evenness and richness were studied. Both total and structural complexities of the communities showed a “high- low-high” tendency with the increase in altitude of the area, which meant that the complexity of communities was the highest at the sites of low and high altitude, whereas it was the lowest at the sites of intermediate altitude. It was found that the total community complexity had significant quadratic correlations with soil organic matter (SOM) content, total nitrogen (N), hydrolyzable N, soil water content, and available potassium (K), whereas it had no significant correlations with soil total K, total phosphorus (P), available P, and pH value. The total community complexity positively correlated with community diversity, species evenness and species richness, whereas the structural complexity negatively correlated with the community evenness. Of the two components of the total community complexity, namely, the structural complexity and the structural diversity, the structural complexity was more sensitive than the structural diversity to the changes of species in the community, which was not only related to the community evenness but also to the community richness. The relative contribution of both the structural complexity and the structural diversity to the total complexity would be different for different study areas or ecosystems.     

Plant community complexity in the arid valley of Minjiang River, southwestern China

Biocomplexity theory is becoming increasingly important in understanding natural vegetation dynamics and interrelation among all components of the ecosystem. In this study, based on the field investigation of plant species and environmental factors (altitude, microtopography, soil water content, and soil nutrients) in an arid valley of the upper reaches of Minjiang River, Sichuan Province, southwestern China, plant community complexity and its relationship with environmental factors, community diversity, species evenness and richness were studied. Both total and structural complexities of the communities showed a “high- low-high” tendency with the increase in altitude of the area, which meant that the complexity of communities was the highest at the sites of low and high altitude, whereas it was the lowest at the sites of intermediate altitude. It was found that the total community complexity had significant quadratic correlations with soil organic matter (SOM) content, total nitrogen (N), hydrolyzable N, soil water content, and available potassium (K), whereas it had no significant correlations with soil total K, total phosphorus (P), available P, and pH value. The total community complexity positively correlated with community diversity, species evenness and species richness, whereas the structural complexity negatively correlated with the community evenness. Of the two components of the total community complexity, namely, the structural complexity and the structural diversity, the structural complexity was more sensitive than the structural diversity to the changes of species in the community, which was not only related to the community evenness but also to the community richness. The relative contribution of both the structural complexity and the structural diversity to the total complexity would be different for different study areas or ecosystems.     

Biodiversity and water quality variations in constructed wetland of Yongding River system

This research was carried on in constructed wetlands of Guan-Ting Reservoir, Beijing, China, from 2004 to 2005. The phytoplankon community was composed of 8 divisions (94 species, including genus and varieties) and the average cell density was 980.93× 10⁴ cells per liter. The dominant divisions were Chlorophyta (36.8%), Bacillariophyta (31.0%) and Cyanophyta (23.4%). The removal rate of phytoplankton density was 72.7%. There was a positive linear correlation between phytoplankon density and total phosphorus. Here, 7 families (13 species) of aquatic vasular plants were found, which constituted emerging and submerging macrophyte communities. In the wetland system, the zooplankton community consisted of Protozoa, Rotifera, Cladocera and Copepoda (70 species). The average density was 4883 individuals per liter. Protozoan and Rotifera were the dominant groups and the removal rate of their density was 81.9%. The correlation between zooplankton and phytoplankton presented a quadratic curve. Also, the zoobenthos community contained Olisochaeta, Uniramia, Crustacea and Mollusca (15 species). The average density was 5670 individuals per m² (62.3% was Uniramia) and the removal rate of their density was 92.4 %. The wetland system reduced COD_Mn, BOD₅, TN, NH_3-N, NO_3-N, TP (total phosphor), PO_4-P and SS in the water of Yong Ding River at 52.9%–99.1%.     

Biodiversity and water quality variations in constructed wetland of Yongding River system

This research was carried on in constructed wetlands of Guan-Ting Reservoir, Beijing, China, from 2004 to 2005. The phytoplankon community was composed of 8 divisions (94 species, including genus and varieties) and the average cell density was 980.93× 10⁴ cells per liter. The dominant divisions were Chlorophyta (36.8%), Bacillariophyta (31.0%) and Cyanophyta (23.4%). The removal rate of phytoplankton density was 72.7%. There was a positive linear correlation between phytoplankon density and total phosphorus. Here, 7 families (13 species) of aquatic vasular plants were found, which constituted emerging and submerging macrophyte communities. In the wetland system, the zooplankton community consisted of Protozoa, Rotifera, Cladocera and Copepoda (70 species). The average density was 4883 individuals per liter. Protozoan and Rotifera were the dominant groups and the removal rate of their density was 81.9%. The correlation between zooplankton and phytoplankton presented a quadratic curve. Also, the zoobenthos community contained Olisochaeta, Uniramia, Crustacea and Mollusca (15 species). The average density was 5670 individuals per m² (62.3% was Uniramia) and the removal rate of their density was 92.4 %. The wetland system reduced COD_Mn, BOD₅, TN, NH_3-N, NO_3-N, TP (total phosphor), PO_4-P and SS in the water of Yong Ding River at 52.9%–99.1%.     

A study on the diversity of the moth community in the North Dagang Wetland Nature Reserve, Tianjin, China

North Dagang Wetland Nature Reserve is situated in the southeast of Tianjin, China. It is the biggest wetland nature reserve in Tianjin. An investigation into the diversity of the moth community was carried out from June 12 to October 14, 2001, and then from April 12 to October 30, 2002. The investigation was conducted in order to identify the moth species in wetlands, study their dynamic laws, select indicator insects to indicate wetland quality, and assist in the study and protection of wetlands. A total of 132 moth species were collected, which belonged to 105 genera in 17 families. The data about insects which was collected during the survey was listed and constructed in terms of species-abundance, indices of diversity (H′), evenness (J′), specific richness (S) and individual number (N) using the Microsoft Excel Program. The status of the wetlands was also analyzed using the moth community species-abundance curve, indices of diversity, the connection between evenness and richness indices, etc. The results show that moth species in the wetlands were not rich, and the moth community was unstable. In other words, the living environment of the moths and the environmental quality of the wetlands were unstable due to the serious degeneration of the wetland environment and human activities.     

Plant biodiversity and its conservation strategy in the in-undation and resettlement districts of the Yangtze Three Gorges, China

The investigation on and conservation project of plant biodiversity in the inundation and resettlement districts of the Three Gorges region were carried out with the ongoing construction of the Three Gorges Dam. Based on the first-hand specimens collected for many years and the historical records, we found that there were about 1784 higher plant species, belonging to 762 genera of 170 families, which accounted for 59.19%, 75.30% and 85.85% of the total amount of species, genera and families in the Three Gorges region, including 27 species specific in these two districts. The shrub and grass communities were mostly distributed along the low-altitude river bank zone of the Yangtze River and were largely influenced by the dynamic water level of the Three Gorges reservoir area. The measurement of Shannon-Wiener and Pielou evenness indexes on 21 Pinus massoniana (Masson pine) communities distributed in the Three Gorges reservoir area was carried out, and results showed that the biodiversity of shrub layers was the highest, followed by grass layers, the middle, and tree layers, the lowest. Among the 11 typical shrub communities in this region, the abundance of shrub layers of Form. Rhus chinensis, Form. Cotinus coggygria var. cinerea, Form. Vitex negundo var. cannabifoliaand and Form. Coriaria sinica was relatively higher, which were 16, 26, 29 and 15, respectively. These four shrubs also showed high biodiversity index (H′), which were 1.791, 3.427, 2.949 and 1.718, respectively. Among the 9 grasslands mainly distributed along the river bank zone, 4 grassland communities with higher altitude (Form. Dicranopteris dichotoma, Form. Miscanthus floridutus, Form. Imperata cylindrica var. major and Form. Arthraxon hispidus) showed higher abundance and biodiversity, which were 1.697, 1.354, 1.144 and 1.018, respectively. Considering the inundation and resettlement districts, there were 22 vegetation types threatened by submersion, including 4 woody plant communities, 9 shrub communities and 9 grassland communities. The 6 shrub communities of Form. Securinega wuxiensis, Form. Bauhinia brachycarpa, Form. Geum aleppicum, Form. Distylium chinense, Form. Buxus henryi and Form. Myrsine africana would be fully submerged and part of Adianthum reniforme var. sinensis and Buxus ichangensis would be also submerged. At present, plant species conservation and monitoring stations in the Three Gorges region have been constructed, and more than 200 plant species have already been transplanted and conserved, including 37 threatened species listed in the China Plant Red Data Book and 11 local constructive species.     

Changes in plant biomass and species composition of alpine Kobresia meadows along altitudinal gradient on the Qinghai-Tibetan Plateau

Alpine Kobresia meadows are major vegetation types on the Qinghai-Tibetan Plateau. There is growing concern over their relationships among biodiversity, productivity and environments. Despite the im-portance of species composition, species richness, the type of different growth forms, and plant bio-mass structure for Kobresia meadow ecosystems, few studies have been focused on the relationship between biomass and environmental gradient in the Kobresia meadow plant communities, particularly in relation to soil moisture and edaphic gradients. We measured the plant species composition, her-baceous litter, aboveground and belowground biomass in three Kobresia meadow plant communities in Haibei Alpine Meadow Ecosystem Research Station from 2001 to 2004. Community differences in plant species composition were reflected in biomass distribution. The total biomass showed a de-crease from 13196.96±719.69 g/m2 in the sedge-dominated K. tibetica swamp to 2869.58±147.52 g/m2 in the forb and sedge dominated K. pygmaea meadow, and to 2153.08±141.95 g/m2 in the forbs and grasses dominated K. humilis along with the increase of altitude. The vertical distribution of below-ground biomass is distinct in the three meadow communities, and the belowground biomass at the depth of 0-10 cm in K. tibetica swamp meadow was significantly higher than that in K. humilis and K. pygmaea meadows (P<0.01). The herbaceous litter in K. tibetica swamp was significantly higher than those in K. pygnaeca and K. humilis meadows. The effects of plant litter are enhanced when ground water and soil moisture levels are raised. The relative importance of litter and vegetation may vary with soil water availability. In the K. tibetica swamp, total biomass was negatively correlated to species richness (P<0.05); aboveground biomass was positively correlated to soil organic matter, soil moisture, and plant cover (P<0.05); belowground biomass was positively correlated with soil moisture (P<0.05). However, in the K. pygnaeca and K. humilis meadow communities, aboveground biomass was posi-tively correlated to soil organic matter and soil total nitrogen (P<0.05). This suggests that the distribu-tion of biomass coincided with soil moisture and edaphic gradient in alpine meadows.     

Changes in plant biomass and species composition of alpine <Emphasis Type="Italic">Kobresia</Emphasis> meadows along altitudinal gradient on the Qinghai-Tibetan Plateau

Alpine Kobresia meadows are major vegetation types on the Qinghai-Tibetan Plateau. There is growing concern over their relationships among biodiversity, productivity and environments. Despite the importance of species composition, species richness, the type of different growth forms, and plant biomass structure for Kobresia meadow ecosystems, few studies have been focused on the relationship between biomass and environmental gradient in the Kobresia meadow plant communities, particularly in relation to soil moisture and edaphic gradients. We measured the plant species composition, herbaceous litter, aboveground and belowground biomass in three Kobresia meadow plant communities in Haibei Alpine Meadow Ecosystem Research Station from 2001 to 2004. Community differences in plant species composition were reflected in biomass distribution. The total biomass showed a decrease from 13196.96±719.69 g/m2 in the sedge-dominated K. tibetica swamp to 2869.58±147.52 g/m2 in the forb and sedge dominated K. pygmaea meadow, and to 2153.08±141.95 g/m2 in the forbs and grasses dominated K. humilis along with the increase of altitude. The vertical distribution of belowground biomass is distinct in the three meadow communities, and the belowground biomass at the depth of 0-10 cm in K. tibetica swamp meadow was significantly higher than that in K. humilis and K. pygmaea meadows (P＜0.01). The herbaceous litter in K. tibetica swamp was significantly higher than those in K. pygnaeca and K. humilis meadows. The effects of plant litter are enhanced when ground water and soil moisture levels are raised. The relative importance of litter and vegetation may vary with soil water availability. In the K. tibetica swamp, total biomass was negatively correlated to species richness (P＜0.05); aboveground biomass was positively correlated to soil organic matter, soil moisture, and plant cover (P＜0.05); belowground biomass was positively correlated with soil moisture (P＜0.05). However, in the K. pygnaeca and K. humilis meadow communities, aboveground biomass was positively correlated to soil organic matter and soil total nitrogen (P＜0.05). This suggests that the distribution of biomass coincided with soil moisture and edaphic gradient in alpine meadows.     

A study on the diversity of the moth community in the North Dagang Wetland Nature Reserve, Tianjin, China

North Dagang Wetland Nature Reserve is situated in the southeast of Tianjin, China. It is the biggest wetland nature reserve in Tianjin. An investigation into the diversity of the moth community was carried out from June 12 to October 14, 2001, and then from April 12 to October 30, 2002. The investigation was conducted in order to identify the moth species in wetlands, study their dynamic laws, select indicator insects to indicate wetland quality, and assist in the study and protection of wetlands. A total of 132 moth species were collected, which belonged to 105 genera in 17 families. The data about insects which was collected during the survey was listed and constructed in terms of species-abundance, indices of diversity (H′), evenness (J′), specific richness (S) and individual number (N) using the Microsoft Excel Program. The status of the wetlands was also analyzed using the moth community species-abundance curve, indices of diversity, the connection between evenness and richness indices, etc. The results show that moth species in the wetlands were not rich, and the moth community was unstable. In other words, the living environment of the moths and the environmental quality of the wetlands were unstable due to the serious degeneration of the wetland environment and human activities.     

Identification of the spectral characteristics of submerged plant Vallisneria spiralis

The relationship between land features and their spectral characteristics is important for the interpretation of remote sensing images. In this study, the spectral characteristics of a submerged plant Vallisneria spiralis with varied coverage was measured with a ground sensor/radiometer, FieldSpec? Pro JR Spectroradiometer in the laboratory and in the constructed wetland of “Mengqingyuan”, Shanghai, China. The results showed that the reflectance rate of Vallisneria spiralis rose with its increasing coverage, which was exhibited both at the visible band (500–650 nm) and the near infrared band (700–900 nm). Water quality influenced the reflectance rate with the primary differences between the laboratory and field experiments mainly occurring at the near-infrared band (700–900 nm). A regression analysis was carried out respectively between the coverage of Vallisneria spiralis and the reflectance rate at the wavelengths of Quick Bird 4 bands where the coverage responded to the strongest. These results of regression analyses showed a clear linear relationship, by which the coverage of Vallisneria spiralis could be quantitatively deduced from the reflectance rate measured in situ. The implications in terms of the ability of hyperspectral remote sensing to distinguish and monitor the distribution and dynamics of submerged vegetation on a large scale are discussed.     

水生植物腐烂分解对水质的影响

对6种水生植物进行64 d的腐烂分解试验,对比不同水生植物腐烂分解过程中水体营养盐浓度的变化.结果表明： 6种水生植物的腐烂分解速率差别较大,浮叶植物分解速度最快,沉水植物次之,挺水植物最慢.不同水生植物腐解过程对水质影响不同,并与植物生物量密度相关.挺水植物芦苇腐解过程中的水体化学需氧量、总氮和总磷浓度最低;在茭草分解后期,水体化学需氧量和总氮浓度上升,水质变差.浮叶植物荇菜和莲腐解过程中,水体化学需氧量和总氮浓度高于其他植物.沉水植物菹草和狐尾藻腐解过程中,水体铵态氮、硝态氮和总磷浓度最高.对于同一种植物,不同生物量密度处理下,主要水质指标变化趋势相似.适量的植物残体的存在可以有效促进水体氮、磷等营养元素的循环,一定程度上去除硝态氮,降低水体氮负荷.     

长江故道湿地植被的数量分类与排序

采用双向指示种分析法（TWINSPAN）和除趋势对应分析法（DCA）对长江故道湿地植被做分类和排序研究。TWINSPAN分类将湿地植被234个样方分为28个群丛,论述了各群丛的群落学特征。DCA排序结果反映了植物群落类型与环境梯度之间的关系,表明影响群丛分布格局的主导生态因子为生境的水分条件。TWINSPAN数量分类在DCA排序图中有较为明确的分布范围和界限,两者的结合使用,能很好地反映群落与环境因子间的生态关系。     

滇西北高原纳帕海湖滨湿地退化特征、规律与过程

采用双向指示种分析(TWINSPAN)和典范对应分析(CCA)方法,研究了滇西北高原纳帕海湖滨湿地退化特征、规律与过程.结果表明: 纳帕海湖滨湿地植物群落可以划分为4个群丛,群落演替规律为水生植物群落→沼泽植物群落→沼泽化草甸植物群落→草甸植物群落.随植物群落演替,群落盖度、密度、多样性指数、物种丰富度和地上生物量均增大,群落高度减小;植物水分生态型演替规律为水生植物→沼生植物→湿生植物→中生植物.随群落演替,湿地水体矿化度、硬度和碱度均降低,氨氮和总磷含量升高,总氮和硝态氮含量变化不明显;土壤pH、有机质和全氮含量逐渐降低,全磷和全钾含量逐渐升高,速效氮和速效磷含量先增大后减小.CCA分析表明,群落结构和物种组成主要受水分梯度影响,土壤pH、全磷和湿地水的总氮、氨氮对湿地植物物种分布和群落演替影响显著.     

高寒湿地退化对植物群落特征与土壤特性的影响

以黄河首曲湿地为研究对象,基于野外采样数据和不同退化程度（无明显退化ND;轻度退化LD;中度退化MD;重度退化HD）,分析植物群落、土壤特性及其关系。结果表明,随湿地退化程度增加,禾本科重要值呈减少趋势而毒杂草重要值呈增加趋势,且植物高度、盖度及地上生物量显著降低;重度退化程度下Patrick物种丰富度指数最低,表明植物群落结构由复杂趋向简单。土壤有机碳、全氮随退化程度增加均显著降低,碳氮比与pH值则呈相反变化,表明高寒湿地退化不利于养分的积累,且土壤逐渐呈碱性。pH、有机碳及全氮为高寒湿地响应退化的理化因子;湿地不同退化程度影响植物群落的土壤因子略有不同,且尤以电导率最为明显,这与土壤养分状况相关。湿地退化过程中植物群落的生长、结构发生改变,植物与土壤理化性质相互作用进而影响湿地生态功能。因此,探究植物群落与土壤理化特征可为修复退化湿地提供依据。     

扎龙湿地硅藻植物群落季节变化及其对环境的响应

扎龙湿地位于黑龙江省西部、松嫩平原乌裕尔河下游,是我国北方同纬度地区最完整的湿地。于2012年春、夏、秋3季,对扎龙湿地6个代表性区域进行硅藻标本采集,经观察鉴定,发现硅藻植物140个分类单位,包括121种19变种,隶属于2纲6目9科30属。羽纹纲物种较丰富,占总种类数的95%。硅藻植物群落呈现明显的季节演替,秋季硅藻种类丰富度及相对丰度明显高于春、夏两季,优势种多以淡水、半咸水、喜弱碱的种类为主,优势种与水体的盐度和酸碱度存在一定的响应关系。应用典范对应分析(Canonical Correspondence Analysis,CCA)探讨硅藻植物群落变化与环境因子之间的关系。CCA结果显示在扎龙湿地中,水温、电导率、pH、溶解氧是影响硅藻群落结构变化的主要因素,此外总氮、总磷也是硅藻群落季节演替的重要驱动因子。结合硅藻植物多样性指数和硅藻商对扎龙湿地水质进行综合评价,结果显示扎龙湿地整体为中-寡污带水体,部分水域水质较清洁,少数样点受人为因素影响,呈轻污染。     

Water depth and biotic insulation: Major determinants of back-swamp plant community composition

Based on phytosociological data, a polythetic divisive classification technique resulted in the delineation of eight broad vegetation types in the back-swamp areas of the Maunachira River System of the Okavango Delta, Botswana. A detrended correspondence analysis indicated that water depth was the major environmental factor influencing the distribution of submerged, floating-leaved and tall, emergent species dominated communities. The remaining communities, with relatively distinct boundaries between each of them, were of short emergent species assemblages rooted in peat deposits with a water depth of less than 0.7 m. Their species composition was not related to water depth, conductivity, pH, redox potential, water temperature or total nitrogen or phosphorus concentrations in the water. The relationship between the present day wetland plant community composition and its environment may be masked by long term, biotic, insulating processes such as the accumulation of resources during peat formation and clonal plant growth. This insulation process does not lead necessarily to long term community stability as has been previously suggested (Mitsch and Gosselink 1986).     

鄱阳湖南矶湿地优势植物群落及土壤有机质和营养元素分布特征

湿地植物和土壤是承担湿地诸多生态功能的主要基质和载体,相互之间有着强烈的影响。湿地土壤影响植物的种类、数量、生长发育、形态和分布,湿地植物又影响土壤中元素的分布与变化。鄱阳湖湿地的植物和土壤的特征及由他们带来的候鸟栖息地价值都受到他们之间的相互作用以及湖泊水位不同频率和幅度波动的影响。研究鄱阳湖湿地植物和土壤的特征及其形成原因和相互关系。为此,从2010年10月到2011年10月,对鄱阳湖湿地不同水位梯度下分布的芦苇、南荻、苔草、虉草和刚毛荸荠5个优势植物群落中57个定点样方展开了月度植被调查并且对5个不同植物群落下的135个土壤样品进行了实验室分析,研究了鄱阳湖优势植物群落及湿地土壤中有机质、全氮、全磷、全钾含量的分布特征及其相互关系。研究结果表明,鄱阳湖湿地优势植物群落分布特征受湿地土壤元素分布特征、湖面水位波动及植物生长特性和土壤沉积及土壤养分的综合影响,呈现了沿水位和海拔梯度明显的条带状或弧状分布、从湖岸到湖心依次分布为:狗牙根群落、芦苇群落、南荻群落、苔草群落、虉草群落、刚毛荸荠群落,最后是水生植物。同时植物群落的组成和分布特征也随季节性水位涨落的变化而变化;土壤有机质及其他各元素含量特征受植物群落分布、水位波动规律及湿地土壤特性等各种因素的影响,呈现出相对一致的分布规律,在0—20cm土壤层含量较高,20cm层后随土壤深度的增加含量逐渐减小,减小的速度先快后慢直至40cm层后趋于稳定;不同植物群落对土壤有机质、全氮、全磷、全钾的含量及变化具有很大的影响,不同植物群落下同种元素含量差异显著,并且各自随土壤深度和植物群落的变化呈现出层状、带状或弧状富集特征。不同植物群落对土壤养分元素含量影响程度不同,苔草群落对各元素吸收和滞留能力最强、影响最大,刚毛荸荠群落对土壤营养元素影响最弱。湿地植物群落和土壤之间彼此有着强烈的影响,其中植株的重量和土壤的SOC、TN及TP含量有非常显著的负相关关系,与土壤TK含量则有较强的正相关关系,同时,植株的重量和高度与土壤地下水埋深也有微弱的负相关关系。     

子午岭地区植被恢复演替过程与环境因子的分类与排序

在野外实地调查基础上,采用双向指示种分析法(TWINSPAN)和除趋势对应分析(DCA)对子午岭地区植物群落进行了数量分类和排序。结果显示:(1)TWINSPAN将50个样方划分为14个群系;DCA排序结果与TWINSPAN分类结果相互印证。(2)第一排序轴上显示出植被由草地、灌丛到森林的恢复演替系列,在此演替过程中土壤中的速效磷逐渐减少,全氮和有机质逐渐增加;第二排序轴反映环境因子的梯度不明显,但植被的演替过程会受到海拔、坡度的影响。研究表明,随着植被恢复演替的进展群落结构在变化,乔木层的重要值增加,所在群落中的全氮、速效磷、有机质等亦呈现规律性变化。     

复合人工湿地对水禽污染废水的净化效果

通过在北京市野生动物救护中心构建表流湿地与潜流湿地相结合的人工湿地来处理富营养化的水体,研究该人工湿地对TP、TN、浊度和CODcr的去除作用。研究表明:表流湿地对TP、TN、浊度和CODcr的去除率可分别达到68%,31%,93%和55%,潜流湿地对TP、TN、浊度和CODcr的去除率可分别达到75%,67%,55%和50%,复合人工湿地对TP、TN、浊度和CODcr的去除率可分别达到80%,50%,95%和90%,人工湿地不同构建类型对TP、TN的去除量没有显著差异(P>0.05),对TP的去除率、浊度和CODcr的去除量及去除率之间存在显著性差异(P<0.05),而对TN的去除率没有显著性差别(P>0.05),通过拟合进出水中不同污染物的质量浓度关系发现,表流湿地、潜流湿地和复合人工湿地进出水中TP、TN及CODcr之间存在显著的线性相关关系(P<0.05),相关系数分别为0.948、0.994、0.952,0.948、0.995、0.958和0.963、0.990、0.927,人工湿地进出水中浊度符合多项式方程规律,相关系数为分别为-0.523(R²=0.451,P>0.05),0.854(R²=0.8756,P<0.05)和-0.086(R²=0.197,P>0.05)。