Effect of Environmental Stressors on the Distribution and Abundance of Macroinvertebrates in Upper Awash River at Chilimo Forest, West Shewa, Ethiopia

Ethiopia is experiencing deterioration in river quality resulting in adverse effects on human health and hydrobionts. This study aimed to analyse the effects of specific environmental stressors on the distribution and abundance of macroinvertebrates in the Upper Awash River. The study was conducted from January 2018 to March 2018. Macroinvertebrates were collected from five sites using standard handheld nets. Physicochemical parameters including electrical conductivity, dissolved oxygen, total phosphorous, nitrate-nitrogen, pH, dissolved oxygen and water temperature that can affect the distribution and abundance of macroinvertebrates were assessed. A total of 14,465 individuals belonging to 33 families of insects and 5 families of the noninsect group were identified. Among all recorded taxa, Diptera was the most abundant and diversified order. Macroinvertebrates among the five sites showed variation in species evenness, richness, and Shannon Diversity Index. Values obtained from biotic indices and environmental parameters indicated the presence of organic pollution at different levels. The impacted downstream site paper mill waste (Walgata) had the relatively highest H-FBI index followed by Osole (more agricultural activities) indicating that Walgata and Osole were poorer in benthic faunal diversity than other sites. In addition, as habitat and water quality degradation increased, the number and percentage of Plecoptera, Ephemeroptera, and Trichoptera (EPT) decreased. The selected metrics will be also useful for the monitoring and assessment of the riverine systems and to access the impact of different stressors. As perturbation increased, species diversity, ETHbios index, Average Score Per Taxon, and family richness decreased, while the percentage of Chironomidae, Diptera, Dominant Taxa, and Hilsenhoff Family-Level Biotic Index increased indicating that tolerant species become abundant in degraded river bodies. Environmental protection agencies of governmental and nongovernmental organizations should make awareness for the local people so that they reduce activities that affect the river. Paper factory should also monitor its effluent from directly discharging into the Upper Awash River.

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Ecological assessment of the River Nile around Gizert El-Warrak by Phytoplankton and macroinvertebrates assemblages

10.1101/297432 ◽

2018 ◽

Cited By ~ 1

Author(s):

Kadria M.A. Mahmoud ◽

Sara S.M. Sayed ◽

Mohamed R. Habib

Keyword(s):

Diversity Index ◽

Ecological Status ◽

Organic Pollution ◽

Ecological Assessment ◽

Biological Assessment ◽

Biotic Index ◽

Trophic State Index ◽

River Nile ◽

Summary Statement ◽

State Index

AbstractBiological assessment is considered a useful tool for assessing the ecological status of the aquatic ecosystems. Therefore, the goal of the present study was to use phytoplankton and macroinvertebrates as biological tools for ecological assessment of the River Nile around Gizert El-Warrak. A total of 33 phytoplankton species identified in the studied stations; these include 16 species of Chlorophyta, 5 species of Cyanophyta and 12 species of Bacillariophyta. All investigated stations characterized by high organic pollution according to Palmer′s index. Trophic state index showed a hyper-eutrophic status in stations S1, S2, S4, S6 and S8 and an eutrophic status in stations S3, S5 and S7.Gastropoda and Oligochaeta were the most dominant of macroinvertebrates taxa recorded 50.8 and 24.6%, respectively. Diversity Index (H′) ranged (1.14 – 2) which indicated that the structure of macroinvertebrates habitat was poor. Also, Evenness Index (J) ranged (0.016 – 0.043) which indicated that individuals were not distributed equally. The values of biotic index depending on macroinvertebrates categories showed that the River Nile’s water quality is fairly poor with significant organic pollution.Summary statementBioassessment based on non-taxonomic measurements of algae and biotic indices of macroinvertebrates may be considered as vital methods that reflect disturbances in aquatic systems for both short-term and long-term.

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Impact assessment of an effluent discharge on benthic macroinvertebrates in a subtropical river using indexes

Acta Scientiarum Biological Sciences ◽

10.4025/actascibiolsci.v41i1.45536 ◽

2019 ◽

Vol 41 ◽

pp. e45536

Author(s):

Sharonn Martins Gonçalves Hartmann ◽

Hérica Rozário ◽

Ana Lucia Suriani Affonso

Keyword(s):

Benthic Macroinvertebrates ◽

Diversity Index ◽

Industrial Effluent ◽

Working Party ◽

Biotic Index ◽

Average Score ◽

Calculated Density ◽

Taxa Richness ◽

Effluent Discharge ◽

High Degree

Benthic macroinvertebrates are used as environmental bioindicators in the assessment of water quality in rivers and lakes, due to the sensitivity of some taxa to pollution. The objective of this research was to evaluate the consequences of industrial effluent discharge on the structure of the benthic community present in a river in the subtropical region of Brazil. The organisms were collected at three points of the Coutinho River, in 2013 (September and November) and 2014 (January and March). To characterize the community were calculated density, Shannon diversity index (H´), Pielou equitability (J), taxa richness, Biotic Indices (Biological Monitoring Working Party - BMWP, Average Score Per Taxon - BMWP-ASPT, Family Biotic Index – FBI) and Canonical Correspondence Analysis (CCA) between sampling points and biotic and abiotic variables. Fifteen taxa were identified and among the collected organisms, the family Chironomidae was the most representative, followed by Oligochaeta, Hirudinea, Bivalvia, Gastropoda. According to the results of the biological indices, point 1 indicated moderate pollution and the following points (2 and 3) showed severe pollution. These indices showed poor waters with a high degree of pollution. The results were efficient in detecting the environmental impacts suffered by the river and suggest the necessity of a continuous monitoring of the same.

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Survey of fish species from the Lower Roosevelt River, Southwestern Amazon basin

Biota Neotropica ◽

10.1590/1676-0611-bn-2018-0717 ◽

2019 ◽

Vol 19 (4) ◽

Author(s):

Marcelo Rodrigues dos Anjos ◽

Nadja Gomes Machado ◽

Mizael Andrade Pedersoli ◽

Nátia Regina Braga Pedersoli ◽

Bruno Stefany Barros ◽

...

Keyword(s):

Dissolved Oxygen ◽

River Water ◽

Fish Species ◽

Amazon Basin ◽

Diversity Index ◽

Environmental Parameters ◽

Abundant Species ◽

Water Levels ◽

Catch Per Unit Effort ◽

Sampling Points

Abstract: This study presents an inventory of the ichthyofauna of the lower Roosevelt River sub-basin and its associated tributaries. Fish sampling with fishing nets and measurements of environmental parameters of water occurred in November/2012 (rising water), February/2013 (flooding), May/2013 (falling water) and August/2013 (drought). Depth mean was 8.86 m, water transparency was 0.6 m, conductivity was 22.7 µS.cm-1, pH was 6.59, dissolved oxygen was 7.63 mg.l-1 and temperature was 28°C. The total estimated capture area was 68,829.6 m2 during 2,880 hours. The catch per unit Effort (CPUE) was 0.37 individuals m-2.day-1. Species were spatially aggregated in all sampling points and river water levels. A total of 5,183 individuals distributed in 7 orders, 29 families, 104 genders and 188 species were sampled in this survey. The diversity index was 4.121 and equitability index was 0.789. The Characiforms order was the most abundant with 106 species, followed by Siluriforms with 63 species and Cichliforms with 23 species. The most abundant species was Serrasalmus rhombeus (Linnaeus, 1766) with 327 individuals (5.9%), followed by Chalceus epakros (Cope, 1870) with 309 individuals (5.6%) and Acestrorhynchus microlepis (Schomburgk, 1841) with 250 individuals (4.5%). Trophicity was characterized by omnivorous (28.6%), piscivorous (14.3%), carnivorous (13.8%) and detritivorous (12.8%). According to IBAMA's regulation, 29.25% of captured species presents ornamental potential.

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KEANEKARAGAMANPLANKTONDANLINGKUNGANPERAIRANMANGROVE DI DAERAHMAYANGAN, SUBANG, JAWABARAT

BAWAL Widya Riset Perikanan Tangkap ◽

10.15578/bawal.3.5.2011.299-310 ◽

2017 ◽

Vol 3 (5) ◽

pp. 299

Author(s):

Sri Endah Purnamaningtyas ◽

Amran Ronny Syam ◽

Didik WahjuHendro Tjahjo

Keyword(s):

Dissolved Oxygen ◽

Environmental Degradation ◽

Food Chain ◽

Diversity Index ◽

Stable Condition ◽

Environmental Parameters ◽

Plankton Community ◽

Phytoplankton Species ◽

Phytoplankton Abundance ◽

Zooplankton Communities

Eksploitasi sumber daya di daerah mangrove kawasan pantai utara Jawa telah mengalami degradasi lingkungan. Untuk melakukan perbaikan, diperlukan data dan informasi keanekaragaman plankton dalam rantai makanan disuatu perairan. Perairan Mayangan merupakan perairan estuari yang mempunyai potensi perikanan yang cukup besar karena daerah ini merupakan daerah penjebak zat hara sehingga mempunyai produktivitas yang tinggi dari perairan lainnya. Tujuan dari penelitian ini adalah untukmengetahui keragaman plankton dan lingkungan perairan di sekitar perairan mangrove Desa Mayangan, Subang, Jawa Barat. Penelitian ini dilakukan pada bulan Pebruari, Mei, dan Desember 2007. Pengambilan contoh plankton menggunakan kemmerer bottle sampler secara vertikal dengan plankton net nomor 25 pada kedalaman antara 0,5-2,0 m. Parameter lingkungan yang diamati meliputikecerahan 17-62 cm, oksigen terlarut 1,9-3,7 mg/l, nitrit 0,007-0,187 mg/l, nitrat 2,483-3,986mg/l, amonium1,589-2,648mg/l, orthofosfat 0,026-0,334mg/l, dan salinitas 19,27-33,08‰. Hasil penelitian ini menunjukkan komposisiplankton di perairan tersebut terdiri atas lima kelas fitoplankton dan empat kelas zooplankton serta satu kelompok larva naupli. Kelimpahan fitoplankton didominansi oleh kelas Bacillariophyceae (26 spesies), sedangkan zooplanktondidominansi oleh kelas Crustacea (tiga spesies), dan Ciliata (tiga spesies). Perairan mangrove Desa Mayangan termasuk perairan dengan kesuburan sedang, dengan kelimpahan fitoplankton berkisar antara 4.024-99.594 sel/l (35.210±19.313) dan kelimpahan zooplankton berkisar antara 1.006-23.138 ind./l (8.249±5.132). Indeks keragaman fitoplankton dan zooplankton menunjukan kondisi kestabilan komunitas dalam kategori sedang. Selama tiga periode pengamatan komunitas plankton tersusun dari 35 komponen (spesies fitoplankton) dan sembilan komponen (spesies zooplankton). Exploitation of resources in the area of mangroves in coastal areas north of Java has suffered environmental degradation. To make improvements, necessary data and information on the diversity of plankton in the food chain in the waters.Mayangan estuarine waters are waters that have potential for significant fisheries for this area is an area of trap nutrients that have a higher productivity than other waters. The purpose of this study is to investigate the diversity of plankton and marine environment in waters around mangrove Mayangan Village, Subang, West Java. Research done in February, May, and December 2007. Plankton sampling using kemmerer bottle sampler plankton net vertically with nomor 25 at depths between 0.5-2 m. Environmental parameters observed included brightness, tranparancy 17-62 cm, dissolved oxygen 1.9-3.7 mg/l, nitrite 0.007-0.187 mg/l, nitrate 2.483-3.986 mg/l, ammonium 1.589-2.648 mg/l, orthophosphate 0.026-0.334 mg/l, and salinity 19.27-33.08‰. The results showed the composition of plankton in these waters consist of five classes of phytoplankton and three classes and one group of zooplankton, larval naupli. Phytoplankton abundance class was dominated by Bacillariophyceae (26 species), while the zooplankton was dominated by the Crustacea (3 species) and Ciliate (3 species).Mangrove waters Village Mayangan including waters with medium fertility, with phytoplankton abundance ranged from 4,024-99,594 cells/l (35,210±19,313) and the abundance of zooplankton ranged between 1,006-23,138 ind./l (8,249±5,132). Diversity index of phytoplankton and zooplankton communities show stable condition in the medium category. During the three observation periods of plankton community composed of 35 components (phytoplankton species) and 9 components (species of zooplankton).

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Environmental Variables and Fisheries Diversity of the Nuwa River, Panchthar, Nepal

Scientific World ◽

10.3126/sw.v13i13.30542 ◽

2020 ◽

Vol 13 (13) ◽

pp. 69-74

Author(s):

Jash Hang Limbu ◽

Archana Prasad

Keyword(s):

Dissolved Oxygen ◽

Fish Species ◽

Environmental Variables ◽

Diversity Index ◽

Environmental Parameters ◽

Influential Factors ◽

Water Volume ◽

Fish Diversity ◽

Fish Assemblage Structure ◽

Fish Samples

The fish samples were collected from October 2017 to June 2018 in Nuwa River from four sampling stations by using cast net, bamboo fish trap and mosquito nets. Environmental parameters: water temperature, dissolved Oxygen (DO), CO2, pH, hardness and water velocity were analyzed during each field visit. Eight fish species were collected in present study. The most copious species were Schizothorax plagiostomus, and Schistura multifaciatus. Shannon-Weiner fish diversity index and species richness recorded were highest at station I and lowest at station III, similarly, evenness index was highest at station I and lowest at station III. The water volume, water depth, and the availability of substrates were found to be major influential factors for the weight and length of the fishes. The redundancy analysis (RDA) portrayed that environmental variables like dissolved oxygen, free- carbon dioxide, and pH were found to be pivotal variables to shape the fish assemblage structure of Nuwa River. The cluster analysis delineated that similarity between fish species subsided as the distance of sites turgid.

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The Effects of Effluent Discharged from Bottling Companies on Algal Composition in Kakuri Stream Kaduna, Nigeria

Nigerian Journal of Basic and Applied Sciences ◽

10.4314/njbas.v27i1.4 ◽

2020 ◽

Vol 27 (1) ◽

pp. 25-33

Author(s):

S.K. ◽

I.Y. Okpanachi

Keyword(s):

Dissolved Oxygen ◽

Dominant Species ◽

Soft Drink ◽

Oxygen Demand ◽

Organic Pollution ◽

Biological Oxygen Demand ◽

Wet Season ◽

Positive Correlation ◽

The Impact ◽

Algal Composition

This study determined the impact of soft drink effluent on algal composition in Kakuri stream, Kaduna South Local Government Area, Kaduna. Limnological studies of soft drink effluent were carried out for a period covering wet and dry seasons across three (3) sampling points code-named Stations A, B and C. Some physio-chemical parameters were analysed using standard methods. A total of 43 species were observed belonging to 5 families. Chlorophyceae and Cyanophyceae were the most abundant families across the three (3) stations. The total flora count was high during the dry season, 1965 cells than wet season, 1071 cells. The most dominant species were Euglena sp., Microcystis sp. and Oscillatoria sp. The pH of the three stations was more alkaline (pH 8.1) but reduces slightly at stations B and C during the months of May (pH 5.2) and August (pH 6.5). The biological oxygen demand (BOD) was relatively high across the stations, dissolved oxygen was generally low except for some months (December at station A and January at station B) that had its dissolved oxygen values above 5.00 mg/l. Euglenophyceae showed positive correlation to conductivity and BOD, Chlorophyceae was positively correlated with BOD, Cyanophyceae showed positive relationship with BOD and dissolved oxygen, Charophyceae was positively correlated with dissolved oxygen, Bacillariophyceae showed positive correlation with pH, temperature, phosphorus, BOD and dissolved oxygen. Effluent discharge and farmland run-off passed into the water body supports growth of dominant species indicating organic pollution, thus, poses a threat to the environment over a long period of time. Keywords: Algae, Effluent, Biological oxygen demand, Dissolved oxygen.

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Evaluation of land use impact on river water quality using macroinvertebrates as bioindicator in Lahumoko Watershed, Buton Island, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d200623 ◽

2019 ◽

Vol 20 (6) ◽

Author(s):

KAHIRUN KAHIRUN ◽

LAODE SABARUDDIN ◽

MUKHTAR MUKHTAR ◽

LAODE MUHAMMAD HARJONI KILOWASID

Keyword(s):

Water Quality ◽

Land Use ◽

River Water ◽

River Flow ◽

Diversity Index ◽

Land Use Changes ◽

River Water Quality ◽

Biotic Index ◽

Land Use Impact ◽

The Impact

Abstract. Kahirun, Sabaruddin L, Mukhtar, Kilowasid LOMH. 2019. Evaluation of land use impact on river water quality using macroinvertebrates as bioindicator in Lahumoko Watershed, Buton Island, Indonesia. Biodiversitas 20: 1658-1670. The Lahumoko Watershed, a small watershed, that empties into the sea is sensitive to water quality changes due to land use changes by humans. Uncontrolled land use changes can threaten the sustainability of the river ecological functions of the watershed. It is important to examine the comparison of river water quality in locations that represent land uses. So, the objectives of this study were to reveal the impact of land use on biological water quality in rivers and to analyze the relationship between macroinvertebrates communities with parameters of biodiversity and physicochemical at the observation locations that represented land use. Biological samplings were done using a hand net with a hole size of 0.5 mm mesh, at five stations, each with three replications, with a length of 30 m of each replication, 60 minutes per station. The results of the study showed that individual abundance, family biotic index and diversity index parameters indicated that the water quality was quite good in the upstream watershed (LM1, LM2, and LM3 stations) and somewhat worse in the middle (LM4 station) and downstream of the watershed (LM5 station). The Spearman's correlation, Dendrogram, and Canonical Correspondent Analysis (CCA) showed that there were similarities among LM1, LM2 and LM3 stations, and also between LM4 and LM5 stations. Physicochemical parameters, especially the velocity and flow rate of the river flow had significant correlation with individual richness and density.

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The use of BMWP and ASPT indices for evaluation of water quality according to macroinvertebrates in Küçük Menderes River (Turkey)

Biologia ◽

10.1515/biolog-2016-0005 ◽

2016 ◽

Vol 71 (1) ◽

Cited By ~ 6

Author(s):

Naime Arslan ◽

Ali Salur ◽

Hasan Kalyoncu ◽

Deniz Mercan ◽

Burcu Barişik ◽

...

Keyword(s):

Water Quality ◽

Biological Monitoring ◽

River Basin ◽

Environmental Quality ◽

Diversity Index ◽

Working Party ◽

Biotic Index ◽

Average Score ◽

Sensitive Species ◽

Wiener Diversity Index

AbstractThis study was carried out in the Küçük Menderes River basin in order to determine the water quality and investigate the environmental quality and the applicability of both the Biological Monitoring Working Party (BMWP) and Average Score Per Taxon (ASPT). Monitoring took place in May, July and September 2014 at 10 stations (7 rivers and 3 lakes) according to the method of Intercalibration Common Metrics. Some metrics (BMWP, ASPT, Family Biotic Index, Simpson Diversity Index, Shannon-Wiener Diversity Index, Margalef Diversity Index, dominance, frequency and existence of sensitive species) were calculated. In total, 69 taxa comprising 5,814 individuals were detected. The taxa having the highest frequency rate were

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A study on bioecology of macroalgae, genus Caulerpa in northern Minahasa Waters, North Sulawesi Province

AQUATIC SCIENCE & MANAGEMENT ◽

10.35800/jasm.1.1.2013.1965 ◽

2013 ◽

Vol 1 (1) ◽

pp. 26

Author(s):

Irma Pulukadan ◽

Rene Ch Keppel ◽

Grevo S Gerung

Keyword(s):

Dissolved Oxygen ◽

Water Temperature ◽

Raw Materials ◽

Economic Value ◽

Algal Growth ◽

Environmental Parameters ◽

Caulerpa Racemosa ◽

Bottom Substrate ◽

North Sulawesi ◽

Ecological Aspects

Alga is a marine resource of potential to fisheries and marine sector. It has an important economic value to promote the economy in Indonesia. Nowdays, algae have been used as a relatively high value fisheries commodity since it has been used for food, industrial, pharmaceutical and cosmetic raw materials. This important potential needs to be supported with understanding of its biology and ecology, so that its utilization could increase the livelihood of the coastal villagers. This study was aimed at inventorying and identifying the members of genus Caulerpa found in North Minahasa Regency waters and studying some biological and ecological aspects of the algae in the area. Resuls showed that there were 7 species recorded, Caulerpa racemosa, C. racemosa var. macrophysa, C. sertularioides, C. taxifolia, C. serrulata,C. lentillifera and C. peltata. Ecologically, the environmental parameters, such as water temperature, salinity, pH, dissolved oxygen, turbidity, were in tolerable ranges for algal growth. Bottom substrate supported the growth of genus Caulerpa as well© Saat ini alga dijadikan sebagai komoditas hasil perikanan dengan nilai ekonomis yang relatif tinggi karena manfaatnya sebagai bahan makanan serta bahan baku industri, farmasi, dan kosmetik. Potensi yang cukup penting ini harus ditunjang dengan ilmu pengetahuan tentang biologi dan ekologi dari alga laut, sehingga pemanfaatannya dapat meningkatkan taraf hidup masyarakat pesisir. Penelitian tentang kajian bioekologi alga makro genus Caulerpa di perairan Minahasa Utara ini dilaksanakan dan diharapkan dapat memberikan informasi ilmiah tentang bioekologi alga makro genus Caulerpa, sehingga dapat dimanfaatkan untuk pengembangan pemanfaatan bagi kepentingan masyarakat pesisir khususnya dan industri alga makro umumnya. Penelitian ini bertujuan untuk menginventarisasi dan mengidentifikasi alga makro genus Caulerpa di perairan Kabupaten Minahasa Utara, dan mengkaji aspek bioekologinya. Hasil penelitian menunjukkan bahwa ditemukan 7 spesies, yaitu Caulerpa racemosa, C. racemosa var. macrophysa, C. sertularioides, C. taxifolia, C. serrulata, C. lentillifera dan C. peltata. Parameter lingkungan seperti suhu, salinitas, pH, oksigen terlarut, tingkat kecerahan air berada pada kisaran yang dapat ditolerir untuk pertumbuhan alga makro, sedangkan substrat juga mendukung pertumbuhan alga makro ini©

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A New Life for the St. Croix River

Water Quality Research Journal ◽

10.2166/wqrj.1988.044 ◽

1988 ◽

Vol 23 (4) ◽

pp. 568-577

Author(s):

Harold S. Bailey

Keyword(s):

Water Quality ◽

Dissolved Oxygen ◽

Discharge Rate ◽

Paper Mill ◽

Regulated River ◽

Secondary Treatment ◽

Pulp And Paper Mill ◽

Oxygen Regime ◽

Oxygen Concentrations

Abstract The water quality of the upper 110 kilometres of the St. Croix River is considered to be pristine. A major industrial discharge renders the lower 14 kilometres of the river a water quality limited segment. Prior to 1970 the Georgia-Pacific Pulp and Paper Mill at Woodland, Maine, discharged untreated effluent directly into the river causing dissolved oxygen concentrations to drop well below 5 mg/L, the objective chosen in the interest of restoring endemic fish populations. Since 1972, the Mill has installed primary and secondary treatment, regulated river discharge rate and effluent composition which has greatly improved the summer dissolved oxygen regime. By 1980, dissolved oxygen concentrations were generally above 5.0 mg/L and restocking the river with Atlantic Salmon (Salmo salar) was initiated.

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