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Inventory and Distribution of Benthic Macroinvertebrates, Indicators of Water Quality in Four Forested Watercourses in Centre Region of Cameroon
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作者 Eric B. Biram à Ngon Sylvie B. Chinche +9 位作者 Josephine Ndjama Jean Dzavi Donald L. Nyame Mbia Mathias Nwaha Serge R. Gwos Nhiomock Blaise R. Mboye Ivone L. Tchaouapi Ulrich Tchouta Chamberline Ngalamou Samuel Foto Menbohan 《Open Journal of Ecology》 2024年第4期381-394,共14页
The inventory of benthic macroinvertebrate species was carried out in some streams of the Mefou catchment area, from August 2021 to August 2022, in order to determine the biological groups that make up the population ... The inventory of benthic macroinvertebrate species was carried out in some streams of the Mefou catchment area, from August 2021 to August 2022, in order to determine the biological groups that make up the population and characterise these environments. The dataset acquired during this study made it possible to update the existing database and contribute to the knowledge of the biological groups associated in these environments, and to provide additional information on the existing ones in relation to bioindication. Overall 80 families were identified and, on the basis of frequencies of occurrence greater than 75%, 22 families were retained as potential biological indicators. The remarkable diversity of insects and the low abundance of Diptera reflect the low degradation of environments and the good quality of water. The high diversity indices obtained reflect the maintenance of the favourable ecological conditions that favours the development of a balanced and, integrated biological community capable of adapting to changes. 展开更多
关键词 benthic macroinvertebrates BIOINDICATORS Biological Quality Forest Watercourse Cameroon
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Benthic Macroinvertebrates of Bull Run Creek: A Pre-Restoration Baseline
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作者 Joe Corsini John Zakrajsek Robert Hassmiller 《Natural Resources》 2023年第6期79-91,共13页
In North America, disturbed riparian zones have had a deleterious effect on the life cycles of anadromous fish, especially the commercially and culturally important salmon and steelhead. The result has been a signific... In North America, disturbed riparian zones have had a deleterious effect on the life cycles of anadromous fish, especially the commercially and culturally important salmon and steelhead. The result has been a significant reduction in the numbers and average size of these fish. Tributaries of the John Day River are important spawning waters for western populations of these fish, and the National Forest Service and the Confederated Tribes of the Umatilla Indian Reservation are cooperating to restore floodplains and riparian zones in a number of these headwater tributaries. Herein we have conducted a pre-restoration study of macroinvertebrates and basic water quality parameters in one of these important spawning locations in central Oregon, Bull Run Creek. Results of the turbidity, pH, dissolved Oxygen, and temperature determinations indicate that overall water quality is good, and benthic macroinvertebrate sampling yielded a number of sensitive organisms, including members of Chloroperlidae, Peltoperlidae, Ryachophilidae, Odontoceridae, and Brachycentridae. At all sites, chironomid larvae (non-biting midge) dominated the assemblages. The EPT Index suggests that Bull Run Creek ranges from fair to excellent in terms of its ability to support sensitive species. Sorensen’s Similarity Coefficient indicates varying degrees of shared diversity between the sites, and Shannon’s entropy calculations suggest moderate to low species diversity at all sites, including the reference site on nearby Boundary Creek. Overall, this study indicates that Bull Run Creek is in fair condition and that it should benefit significantly from the restoration efforts. 展开更多
关键词 benthic macroinvertebrates RESTORATION Diversity Anadromous Fish BEAVER
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The Community Structure of Benthic Macroinvertebrates Associated with Spartina alterniflora in the Yangtze Estuary, in China 被引量:7
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作者 谢志发 章飞军 +1 位作者 刘文亮 陆健健 《Zoological Research》 CAS CSCD 北大核心 2007年第2期167-171,共5页
Benthic macroinvertebrate communities in Spartina alterniflora zones in the Yangtze Estuary, in China, were investigated seasonally in 2005, and their structure and biodiversity were analyzed. Twenty-one species were ... Benthic macroinvertebrate communities in Spartina alterniflora zones in the Yangtze Estuary, in China, were investigated seasonally in 2005, and their structure and biodiversity were analyzed. Twenty-one species were identified, across four Classes; 10 species of Crustacea, five species of Polychaeta, five species of Gastropoda, and one species of Lamellibranchia. Dominant species included: Assiminea sp., Notomastus latericeus, Cerithidea largillierl, Gtauconome chinensi and Gammaridae sp. Functional groups were comprised of a phytophagous group and a detritivorous group. The average density of all benthic macroinvertebrates was 650.5 ±719.2 inds/m^2 in the survey area. The high value of the standard deviation of the average density was a result of abundant Assiminea sp. at Beihu tidal flats. The average density of macroinvertebrates from Beihu tidal flat, Chongming Dongtan to Jinshanwei tidal flat decreased gradually. There was significant difference between compositions and abundance of macroinvertebrates along the estuary gradient (P 〈 0.05). The density and biodiversity were highest in summer and lowest in winter. The mean biomass of macroinvertebrates was 20.8 ± 6.1 g/m^2. Biomass changed seasonally in the same way as density, with the change in biomass being: summer (Aug.) 〉autumn (Oct.) 〉spring (Apr.) 〉 winter (Dec.). A BIO-ENV analysis showed that the mean grain size of sediment, height of Spartina and salinity were the ma- jor factors which affected the structure of the macroinvertebrate community. Variations in the community structure were probably caused by the population dynamics of S. alterniflora along with the variation in sampling time and location. 展开更多
关键词 benthic macroinvertebrate Spartina alterniflora Yangtze Estuary Community structure
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Influence of Water Quality on the Variation Patterns of the Communities of Benthic Macroinvertebrates in the Lakes of the Central Highlands of Peru 被引量:1
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作者 María Custodio Richard Penaloza 《Open Journal of Marine Science》 2019年第1期1-17,共17页
The influence of water quality on the variation patters of benthic macroin-vertebrate communities in the lakes in the central highlands of Peru was eva-luated. Samples of water and sediments were collected in 23 diffe... The influence of water quality on the variation patters of benthic macroin-vertebrate communities in the lakes in the central highlands of Peru was eva-luated. Samples of water and sediments were collected in 23 different sam-pling sites last 2017. The physiochemical variables of water quality deter-mined on site were: DO, TDS, EC, temperature and pH. The results obtained revealed that the physiochemical indicators are within the environmental quality standards for water, except COD and BOD5. Regarding the benthic macroinvertebrates, four phyla were identified wherein the most common is the phylum Arthropoda having the abundance and richness of taxa. The PCA reduced the variables to a few significant components that caused variation in water quality between lakes. The cluster analysis in relation to the relative abundance of benthic macroinvertibrates grouped the 22 sampling sites into three groups with the similar characteristics. The PCoA analysis of the ben-thic macroinvertebrate communities showed a clear separation of sites. The SIMPER analysis at the family-level showed the distribution of the most common species. Therefore, at a significance level of 0.01 it demonstrates that there are significant differences between the number of species and abun-dance of the areas that were evaluated. 展开更多
关键词 High Andean Wetlands Water Quality benthic macroinvertebrates DIVERSITY
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Spatiotemporal Variation of Benthic Macroinvertebrates in Some Tropical Forest Streams of the Nyong Catchment (Cameroon)
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作者 Jean Dzavi Samuel Foto Menbohan +2 位作者 Blaise Rollinat Mboye Mathias Nwaha Eric Belmond Biram à Ngon 《Open Journal of Applied Sciences》 CAS 2022年第7期1210-1231,共22页
With the aim of assessing the benthic macroinvertebrates’ diversity, a study was carried out in some tropical forest streams of the Nyong River catchment in Cameroon from February 2019 to February 2020. A total of 16... With the aim of assessing the benthic macroinvertebrates’ diversity, a study was carried out in some tropical forest streams of the Nyong River catchment in Cameroon from February 2019 to February 2020. A total of 167 samples were carried out from 13 stations during 13 months. Some environmental variables were measured. These parameters varied more or less from station to station but significantly at the temporal level. In this study, 13,690 benthic macroinvertebrates belonging to 4 phyla, 7 classes, 16 orders and 93 families were collected. The benthic macroinvertebrates were more abundant and more diversified in the stations whose waters are well oxygenated and present a moderate current compared to the stations with a very weak current. The diversity varied significantly from 1.33 ± 0.14 bits/ind to 2.00 ± 0.35 bits/ind and the high values were found in stations with multiple substrates and well-oxygenated waters. Temporally, the diversity varied significantly from 1.10 ± 0.16 bits/ind in NM sampling station in February 2020 to 1.87 ± 0.1 bits/ind in the OB sampling station in September. In addition, the settlement was more abundant during the short dry season, more precisely during the month of August (1471 individuals) but richer during the long dry season during the month of February (54 families). The distribution of the abundances of the benthic fauna in the different stations made it possible to identify five typological groups using the rarefaction curves, the ascending hierarchical classification and the principal component analyses. Each of these five groups is characterized by a specific taxonomic richness, composition and abundance. 展开更多
关键词 benthic macroinvertebrates Environmental Variables Faunistic Diversity Taxonomic Richness Biotypology Tropical Forest Streams Cameroon
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Effects of <i>Microcystis aeruginosa</i>on New Jersey Aquatic Benthic Macroinvertebrates
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作者 Stephanie Beck Meiyin Wu 《Advances in Microbiology》 2021年第3期165-180,共16页
As increases in anthropogenic eutrophication and climate change contribute to more severe and frequent cyanobacterial harmful algal blooms in freshwater ecosystems worldwide, understanding the effects and consequences... As increases in anthropogenic eutrophication and climate change contribute to more severe and frequent cyanobacterial harmful algal blooms in freshwater ecosystems worldwide, understanding the effects and consequences cyanobacterial blooms have on aquatic organisms is crucial. <i><span style="font-family:Verdana;">Microcystis aeruginosa </span></i><span style="font-family:Verdana;">is</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">one of the most common cyanobacteria taxa found in cyanobacterial blooms, producing a number of toxins including Microcystins. This study examined the effects of </span><i><span style="font-family:Verdana;">Microcystis aeruginosa </span></i><span style="font-family:Verdana;">on aquatic benthic macroinvertebrates, specifically the pollution intolerant taxa Ephemeroptera, the pollution moderately intolerant taxa Zygoptera, and the pollution tolerant taxa Chironomidae. In a controlled lab environment, macroinvertebrates were exposed to approximately 100,000 cells/ml of </span><i><span style="font-family:Verdana;">Microcystis</span></i><i><span style="font-family:Verdana;"> </span></i><i><span style="font-family:Verdana;">aeruginosa</span></i><span style="font-family:Verdana;">. The survival percentage was lower for macroinvertebrates exposed to </span><i><span style="font-family:Verdana;">Microcystis aeruginosa</span></i><span style="font-family:Verdana;"> in all three tolerance groups</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">(</span><i><span style="font-family:Verdana;">p</span></i><i><span style="font-family:Verdana;"> </span></i><span style="font-family:Verdana;"><</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">0.001)</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">while corresponding with the pollution tolerance levels of the species. Mayflies had a survival percentage of 38% in the treatment groups compared to a 98% survival percentage for control groups. Damselflies had a 43% survival percentage in the treatment groups compared to a 98% survival percentage in the control groups. Midges had a 72% survival percentage in the treatment groups compared to a 100% survival percentage in the control groups.</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">These findings support the notion that cyanobacterial blooms have deleterious effects on freshwater ecosystems and can affect aquatic food webs.</span> 展开更多
关键词 CYANOBACTERIA Harmful Algal Bloom Aquatic benthic Macroinvertebrate Microcystis aeruginosa
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Impact of Dewatering on the Spatio-Temporal Distribution of Benthic Macroinvertebrate Communities in the Okpara River, Benin
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作者 Sylvain Tayéwo Biaou Fadéby Modeste Gouissi +4 位作者 Armelle Sabine Yélignan Hounkpatin Zoulkanerou Orou Piami Wakili Bolatito Yessoufou Souradjou Orou Goura Nonvignon Martial Fassinou 《Journal of Geoscience and Environment Protection》 2024年第2期30-43,共14页
Surface watercourses are areas of very high ecological and heritage value. Macroinvertebrates are bioindicators of the health of aquatic ecosystems. The aim of this study was to assess the effects of dewatering and re... Surface watercourses are areas of very high ecological and heritage value. Macroinvertebrates are bioindicators of the health of aquatic ecosystems. The aim of this study was to assess the effects of dewatering and re-watering cycles on benthic macroinvertebrate (BMI) communities. Two data collections were carried out at two stations (Okpara 1 and Okpara 2) on the Okpara river before and after dewatering. Thus, 8 samples of benthic macroinvertebrates and 12 physico-chemical parameters (T°C, pH, Transparency, Depth, Conductivity, Dissolved Oxygen that were measured in situ, and BOD5, COD, NH<sub>4</sub><sup>+</sup>, NO<sub>3</sub><sup>-</sup>, NO<sub>2</sub><sup>-</sup> and PO<sub>4</sub><sup>3-</sup>) were assayed in the laboratory. Canonical Correspondence Analysis (CCA) was used to match physico-chemical data to MIB families. Shannon and Piélou diversity indices were used to determine the effects of dewatering on MIBs. The increase in temperature values of pH, BOD5, COD, NH4</sub>+</sup>, NO3</sub>-</sup>, NO2</sub>-</sup> and PO4</sub>3-</sup>, after re-watering indicates the effect of dewatering on the quality of Okpara aquatic ecosystems. The benthic macrofauna collected consisted of 62.42% insects, 0.65% crustaceans, 6.48% molluscs, 0.72% worms and 0.14% arachnids. Whereas after re-watering, 21.67% insects, 0% crustaceans, 0.22% molluscs, 7.56% worms and 0.29% arachnids were recorded. Insects, crustaceans and molluscs were more abundant before dewatering than after. This was revealed by low abundances and taxonomic richness, as well as low Shannon index values of samples collected after re-watering. 展开更多
关键词 DEWATERING benthic macroinvertebrates IMPACT Physico-Chemical Parameters Okpara Rivers Nord-Benin
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Community structure of benthic macroinvertebrates in reclaimed and natural tidal flats of the Yangtze River estuary 被引量:1
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作者 Junzeng Xue Jiqiang Yang +2 位作者 Qiong Wang Richard B.Aronson Huixian Wu 《Aquaculture and Fisheries》 2019年第5期205-213,共9页
Previous studies have found differences between communities of benthic macroinvertebrates living in constructed tidal flats compared with natural ones.We analyzed the distributional characteristics of benthic macroi... Previous studies have found differences between communities of benthic macroinvertebrates living in constructed tidal flats compared with natural ones.We analyzed the distributional characteristics of benthic macroinvertebrates in a blowing sand reclamation area(Area A),a dike-building silting area(Area B),an out-ofsiltation area(Area C),and a natural tidal flat(Area D)in order to characterize the community structure and diversity of benthic macroinvertebrates in a human-disturbed estuarine tidal-flat wetland.A total of 32 benthic macroinvertebrate species were identified(Area A=7;Area B=12;Area C=10;Area D=27).The diversity index was variable where:Area B<Area C<Area A<Area D.A higher average annual abundance of benthic macroinvertebrates was found at Area B(840.43±569.23)ind/m^(2) than in Area D(203.00±5.85)ind/m^(2),Area A(42.87±10.21)ind/m^(2),and Area C(17.64±1.50)ind/m^(2).The biomass in Area C(3.18±0.39)g/m^(2) was lower than in the other areas.One-Way ANOVAs detected significant differences(P<0.05)in the abundance and biomass within Area B among seasons;however,there were no significant seasonal differences(P>0.05)in the abundance and biomass of Areas A,C,and D.An abundance/biomass curve showed that the habitat in Areas A,B,and C could be categorized as moderately disturbed,whereas Area D was categorized as undisturbed.The results of cluster analysis suggested distinct assemblages in the four sampling areas.Reclamation raised the altitude of tidal flats,weakening the tidal power and changing the physical and chemical parameters of the water,leading to a change in the community structure of benthic macroinvertebrates. 展开更多
关键词 Reclamation area Tidal flat benthic macroinvertebrates Community structure
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Inferring community properties of benthic macroinvertebrates in streams using Shannon index and exergy
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作者 Tuyen Van NGUYEN Woon-Seok CHO +3 位作者 Hungsoo KIM Il Hyo JUNG YongKuk KIM Tae-Soo CHON 《Frontiers of Earth Science》 SCIE CAS CSCD 2014年第1期44-57,共14页
Definition of ecological integrity based on community analysis has long been a critical issue in risk assessment for sustainable ecosystem management. In this work, two indices (i.e., Shannon index and exergy) were ... Definition of ecological integrity based on community analysis has long been a critical issue in risk assessment for sustainable ecosystem management. In this work, two indices (i.e., Shannon index and exergy) were selected for the analysis of community properties of benthic macroinvertebrate community in streams in Korea. For this purpose, the means and variances of both indices were analyzed. The results found an extra scope of structural and functional properties in communities in response to environmental variabilities and anthropogenic disturbances. The combination of these two parameters (four indices) was feasible in identification of disturbance agents (e.g., industrial pollution or organic pollution) and specifying states of communities. The four-aforemen- tioned parameters (means and variances of Shannon index and exergy) were further used as input data in a self- organizing map for the characterization of water quality. Our results suggested that Shannon index and exergy in combination could be utilized as a suitable reference system and would be an efficient tool for assessment of the health of aquatic ecosystems exposed to environmental disturbances. 展开更多
关键词 benthic macroinvertebrates ecological integ-rity anthropogenic pollution self-organizing map
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Spatial and seasonal pattern of macrozoobenthic assemblages and the congruence in water quality bioassessment using different taxa in artificial Mingzhu Lake in Shanghai 被引量:3
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作者 胡忠军 贾茜茜 +2 位作者 陈细华 张颖 刘其根 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2016年第5期928-936,共9页
The spatial and seasonal pattern of macrozoobenthic structure and its relationship with environmental factors were studied from July 2006 to April 2008 in Mingzhu Lake,Chongming Island,Shanghai at the Changjiang River... The spatial and seasonal pattern of macrozoobenthic structure and its relationship with environmental factors were studied from July 2006 to April 2008 in Mingzhu Lake,Chongming Island,Shanghai at the Changjiang River mouth.The congruences in water quality bioassessment based on diversity and biotic indices and using different taxonomic categories were also explored to find the best assessment method of water quality for the lake.All major structural characteristics of macrozoobenthic community,including species composition,abundance,biomass and four biomass-based diversity indices(Shannon's diversity,Simpson's diversity,Pielou's evenness and Simpson's evenness index) fluctuated significantly in season but in space.The above four abundance-based diversity indices plus abundance-based Margalef's richness index did not display significant spatial variations;and significant seasonal differences were found in three indices only.Water temperature was the key environmental factor responsible for macrozoobenthic spatio-temporal distribution patterns.Water quality assessed by Shannon's index(H_a') and biological pollution index(BPI) rather than the other four biotic indices were consistent with those by trophic state index(TSI).Results from chironomids and oligochaetes did not always agree to those from the whole community when H_a' or Hilsenhoff biotic index was applied to bioassessment.Therefore,combining multiple indices and avoiding a single taxonomic category to assess water quality are strongly recommended and in Mingzhu Lake using a mixture of H_a' and BPI will ensure the most effective investigation of water quality.Our results also show that the main structural characteristics of macrozoobenthic communities in the small lake may display consistent spatial patterns. 展开更多
关键词 Chongming Island benthic macroinvertebrate community structure BIODIVERSITY spatial and seasonal variation water quality bioassessment
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Water quality impacts of small-scale hydromodification in an urban stream in Connecticut, USA 被引量:1
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作者 Bin Zhu Daniel S.Smith +5 位作者 Anthony P.Benaquista Dylan M.Rossi Betsy M.Kadapuram Man Lok Yu Andrew S.Partlow Nathan R.Burtch 《Ecological Processes》 SCIE EI 2018年第1期106-115,共10页
Introduction:Construction activities in and along urban streams increase the sediment input into surface waters,causing an overall decline in water quality and aquatic ecosystems.In this case study,we investigate the ... Introduction:Construction activities in and along urban streams increase the sediment input into surface waters,causing an overall decline in water quality and aquatic ecosystems.In this case study,we investigate the water quality impacts of local hydromodification in an urban stream(discharge 0.4 m^(3)/s).At the site of interest,workers removed a stream crossing consisting of an embankment with culverts and replaced it with a small bridge(single span of 25 m)in an effort to improve flow capacity.Methods:Water samples were taken at four sites along the North Branch Park River in Connecticut,Northeastern United States.Turbidity and dissolved oxygen(DO)were measured in situ,and nitrate and total phosphorus(TP)were measured in the laboratory.Benthic macroinvertebrate samples were also collected and analyzed for taxon richness and Shannon-Weaver species diversity.Data were compared between upstream and downstream sites and before,during,and after hydromodification.We used one-way ANOVA combined with the post hoc Turkey test to derive statistical significance.Results:During construction,turbidity increased temporarily by 60.9%[from 2.48 Nephelometric Turbidity Units(NTU)over ambient to 4.00 NTU].Once construction was completed,DO increased locally from 11.0 to 13.0 mg/L.Benthic macroinvertebrate taxon richness and species diversity declined by 61.6 and 32.6%respectively,with no recovery observed in the year following construction.Water quality was only affected within 50 m downstream.Nitrate and TP concentrations were unaffected.Conclusions:Small-scale hydromodification temporarily increased the turbidity as a result of increased sediment input,approaching the maximum level for clean water(5 NTU).Benthic macroinvertebrate communities declined in the immediate downstream vicinity of construction but are expected to recover soon given that turbidity recovered to pre-construction levels,and DO increased.These outcomes emphasize that environmental assessment is important not only for large-scale hydromodification but also for smaller scale stream modifications. 展开更多
关键词 Urban streams POLLUTION Hydrologic services Water quality benthic macroinvertebrates North Branch Park River
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Spatial variations of macrozoobenthos and sediment nutrients in Lake Yangcheng: Emphasis on effect of pen culture of Chinese mitten crab 被引量:16
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作者 Liping Chen Ying Zhang +4 位作者 Qigen Liu Zhongjun Hu Yuejuan Sun Ziran Peng Lijing Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第11期118-129,共12页
We determined the effect of Chinese mitten crab(CMC) pen culture on the quantified spatial distribution of the macrozoobenthic community and sediment nutrients in Lake Yangcheng.Redundancy analysis indicated that wa... We determined the effect of Chinese mitten crab(CMC) pen culture on the quantified spatial distribution of the macrozoobenthic community and sediment nutrients in Lake Yangcheng.Redundancy analysis indicated that water temperature, macrophyte occurrence, sediment type, and crab culture were the main environmental factors that influence the spatiotemporal macrozoobenthic distribution. Macrozoobenthic assemblages in the lake were characterized by eutrophic indicator species. In the most polluted estuaries, the abundance and diversity indices of the whole community and abundance of chironomids and oligochaetes were significantly depressed, and sediment carbon(C) and phosphorus(P) were significantly enhanced compared with those in the western, middle(MB), and eastern basin(EB). Crab culture in this lake had significant effects on the species composition of the macrozoobenthic community in one of three CMC culture pens(CP), and generally depressed the abundance of most chironomid and oligochaete species. Significantly increased diversity, evenness, sediment carbon and nitrogen content, and sediment C:P ratio in the CP were found compared with those in the three basins.However, no conspicuous difference in sediment P content between the CP and the two basins of MB and EB was detected. Our results showed that the enhanced diversity and evenness of macrozoobenthos might be associated with the joint effect of macrophyte planting and crab predation, and macrophyte planting may modify the effects of CMC culture by leading to disproportional accumulation of C and N in the sediment relative to P in the CP of the lake. 展开更多
关键词 Lake Yangcheng benthic macroinvertebrate Community structure Sediment nutrient Spatial distribution Pen farming
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