Acute bioassays with benthic macroinvertebrates conducted in situ

1989 ◽  
Vol 43 (4) ◽  
pp. 570-575 ◽  
Author(s):  
Michael Whaley ◽  
Renato Garcia ◽  
Jaime Sy
Keyword(s):  
Benthic Macroinvertebrates ◽  
Acute Bioassays

scholarly journals Impacts of Anthropogenic Stressors on Hydrochemistry, Benthic Macroinvertebrates and Sediment Characteristics of the Lagos Lagoon, Nigeria

2021 ◽  
Vol 25 (8) ◽  
pp. 1349-1356
Author(s):  
O.F. Fasuyi ◽  
W.A. Yusuf ◽  
J.A. Nkwoji
Keyword(s):  
Benthic Macroinvertebrates ◽  
Total Population ◽  
Benthic Fauna ◽  
Sediment Characteristics ◽  
Sediment Grain Size ◽  
Anthropogenic Stressor ◽  
Lagos Lagoon ◽  
Capitella Capitata ◽  
Number Of Individuals

The anthropogenic impact on the water, benthic macroinvertebrates and sediment grain size of Lagos lagoon was investigated between July and October, 2019. Ten sampling stations were selected based on their importance as likely sources of different forms of anthropogenic stressor to the lagoon. Water temperatures, pH and salinity were measured in situ. Water and benthic samples were collected monthly and analysed using standard methods. Nutrient levels were determined using a spectrophotometer. The hydrochemistry of the stations differed significantly (p<0.05) with the exception of temperature and pH. The sediment grains across the study stations consists basically of sand and mud, with sand dominating the grain type. A total of 502 individuals comprising 3 phyla, 4 classes, 10 families and 11 species was recorded. The phylum mollusca which contributed 92% to the total number of individuals was represented by two Classes; Gastropoda and Bivalvia, with the gastropod Tympanotonus fuscatus having the highest number of individuals (321). Thephylum Annelida represented by one Class, Polychaeta and two Species Nereis sp. and Capitella capitata contributed 6% to the total number of individuals. The class Crustacea, representing the Phylum Arthropoda was the least sampled (7 individuals) constituting about 1.4% of the total population Result showed that different pollution sources have negatively impacted the water chemistry of the lagoon and reduced the diversity and abundance of its benthic macroinvertebrates community. The sedentary nature of this group of benthic fauna could be the major reason why they are most impacted.

scholarly journals Taxonomic Diversity and Structure of Benthic Macroinvertebrates of Taabo Lake (Basin of Bandama; Ivory Coast)

2020 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Yanick Djoman Tanon ◽  
Idrissa Adama Camara ◽  
Norbert Kouakou Kouadio ◽  
Lassina Doumbia ◽  
Allassane Ouattara ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Benthic Macroinvertebrates ◽  
Ivory Coast ◽  
Taxonomic Diversity ◽  
Diversity Indices ◽  
Quality Parameters ◽  
Lake Basin ◽  
Littoral Zones ◽  
Sampling Points

The taxonomic diversity and structure of benthic macroinvertebrates of Taabo Lake (Ivory Coast), from November 2017 to October 2018 were evaluated. Water quality parameters, such as temperature (T °C), water transparency (cm), dissolved oxygen (mg.L-1), pH, turbidity (NTU), electrical conductivity (EC, µS.cm-1) were measured in situ using a multi-parameter probe HANNA, from four sampling points (littoral and sub-littoral zones) in Taabo Lake. Benthic macroinvertebrates sampling were collected by using Van veen in stainless steel. A total of 63 benthic macroinvertebrates taxa belonging to 23 Families, 8 Orders, 2 Classes and 2 Phylums (Molluscs and Arthropods) were identified. The most abundant of benthic macroinvertebrates were Mesogastropoda (66%) represented in all sampling points. They were followed by Diptera (25%), Odonata (3%), Ephemeroptera (3%), Basommatophora (2%), Heteroptera (1%), Lepidoptera and Coleoptera (less than 1%). The values of diversity indices of benthic macroinvertebrates collected in Taabo Lake showed no significant variations between sampling points.

Aquatic oligochaetes (Annelida: Clitellata) of seven lakes in the Ceyhan River basin (Turkey)

Biologia ◽  
2016 ◽  
Vol 71 (1) ◽  
Author(s):  
Özlem Findik ◽  
Seval Aras
Keyword(s):  
Surface Water ◽  
River Basin ◽  
Benthic Macroinvertebrates ◽  
Protected Area ◽  
Eastern Anatolia ◽  
Chemical Parameters ◽  
Dominant Group ◽  
Physico Chemical ◽  
Different Depths

AbstractOligochaeta samples were collected from seven lakes (2 natural and 5 non-natural) of Ceyhan River basin during the summer and autumn seasons of 2014. The Ceyhan River basin is located in the south-eastern Anatolia region in Turkey. Lakes Gölbaşı and Azaplı are located in a protected area. Some physico-chemical parameters of surface water were measured in situ. Sampling for oligochaetes was conducted by using both hand-nets and an Ekman Birge grab sampler, with samples obtained from different depths. Oligochaetes represented the dominant group of the total benthic macroinvertebrates in samples, with the exception of samples collected from Ayvalı Dam lake. A total of 11,293 oligochaete specimens were sorted from samples collected from these lakes, from which 14 species belonging to 2 subfamilies (Naidinae and Tubificinae) were identified.

In situ effects of a microplastic mixture on the community structure of benthic macroinvertebrates in a freshwater pond

2021 ◽  
Author(s):  
Jelena Stanković ◽  
Djuradj Milošević ◽  
Boris Jovanović ◽  
Dimitrija Savić‐Zdravković ◽  
Ana Petrović ◽  
...  
Keyword(s):  
Community Structure ◽  
Benthic Macroinvertebrates ◽  
Freshwater Pond

scholarly journals Effect of a Summer Flood on Benthic Macroinvertebrates in a Medium-Sized, Temperate, Lowland River

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 885
Author(s):  
Somsubhra Chattopadhyay ◽  
Paweł Oglęcki ◽  
Agata Keller ◽  
Ignacy Kardel ◽  
Dorota Mirosław-Świątek ◽  
...  
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Ecological Status ◽  
Diversity Indices ◽  
Ammonium Nitrogen ◽  
Flood Peak ◽  
Taxa Richness ◽  
Extreme Hydrological Events ◽  
Summer Flood

Floods are naturally occurring extreme hydrological events that affect stream habitats and biota at multiple extents. Benthic macroinvertebrates (BM) are widely used to assess ecological status in rivers, but their resistance and resilience to floods in medium-sized, temperate, lowland rivers in Europe have not been sufficiently studied. In this study, we quantified the effect of a moderate (5-year return period) yet long-lasting and unpredictable flood that occurred in summer 2020 on the BM community of the Jeziorka River in central Poland. To better understand the mechanisms by which the studied flood affected the BM community, we also evaluated the dynamics of hydrological, hydraulic, channel morphology, and water quality conditions across the studied 1300 m long reach. Continuous water level monitoring, stream depth surveying, and discharge measurements. As well, in-situ and lab-based water quality measurements were carried out between March and August 2020. BM communities were sampled three times at eight sites along the reach, once before and twice after the flood. High flow velocities during the flood resulted in stream bed instability leading to sand substrate movement that caused streambed aggradation by up to 0.2 m. Dissolved oxygen and ammonium-nitrogen were major drivers of BM community structure. Taxa richness, abundance, and the BMWP-PL index declined significantly, whereas Shannon evenness and Simpson diversity indices showed no significant change in the first post-flood sampling, as indicated by Kruskal–Wallis and Tukey tests. Non-metric multidimensional scaling (NMDS) analysis showed that community composition was also significantly affected by the flood. Seven weeks after the flood peak (August 2020 sampling), BM communities had fully recovered from the disturbance. The results can serve as a first approximation of the resistance and resilience of BM communities for relevant applications in other medium-sized, low-gradient, temperate rivers.

scholarly journals Komunitas makroinvertebrata bentik di perairan Situ Cibuntu, Jawa Barat

DEPIK ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 501-509
Author(s):  
Aiman Ibrahim ◽  
Imroatushshoolikhah Imroatushshoolikhah ◽  
Reliana Lumban Toruan ◽  
Ira Akhdiana ◽  
Lukman Lukman
Keyword(s):  
Benthic Macroinvertebrates ◽  
Diversity Index ◽  
Benthic Invertebrate ◽  
Melanoides Tuberculata ◽  
Wiener Diversity Index ◽  
Urban Pond ◽  
Benthic Invertebrate Community ◽  
Invertebrate Community Structure

Situ Cibuntu, is one of urban ponds located in Bogor Regency, West Java. With a maximum surface area of 11 ha and maximum depth of 1,20 m, the pond serves as irrigation for nearby agricultural fields and recreational fishing. Located in relatively high urban pressure, the pond is highly affected by domestic, agricultural and industrial inflow which can influence the biotic community such as benthic macroinvertebrate. We studied benthic invertebrate community structure in Situ Cibuntu from October to November 2018 to determine the role of environmental factors on benthic macroinvertebrates. Samples were collected biweekly from five sampling points using an Ekman sediment grab with three replicates. Our study revealed 16 species of benthic macroinvertebrates belonging to four classes including Gastropoda, Bivalvia, Clitellata, and Insecta. Melanoides tuberculata species was found to have the highest abundance with an average abundance of 858 individuals/m2. Shanon-Wiener Diversity Index shows a relatively low diversity ranged from 0.61 to 1.26, while evenness index ranged from 0.36 to 0,66. Simpson Dominance Index ranged from 0.24 to 0.93.Keywords:DominanceCommunityAbundanceDiversityBenthic MacroinvertebratePond CibuntuABSTRAKSitu Cibuntu merupakan salah satu situ urban (urban pond) yang terletak di Kabupaten Bogor, Provinsi Jawa Barat. Situ Cibuntu yang memiliki luas permukaan 2,11 ha dengan kedalaman maksimum 1,20 m dimanfaatkan sebagai sumber irigasi pertanian dan sarana pemancingan ikan. Situ di kawasan perkotaan dapat mengalami tekanan karena pengaruh limbah domestik, pertanian, dan industri yang dapat mempengaruhi komunitas biotik seperti makroinvertebrata bentik. Penelitian ini bertujuan untuk mengetahui komunitas makroinvertebrata bentik di perairan Situ Cibuntu. Penelitian dilakukan pada bulan Oktober hingga November 2018 di lima stasiun pengamatan. Pengambilan sampel dilakukan sebanyak tiga kali dengan interval waktu dua minggu. Sampel makroinvertebrata bentik diambil dari sedimen pada setiap stasiun dengan menggunakan Ekman grab sebanyak tiga kali ulangan. Secara keseluruhan ditemukan 16 spesies makroinvertebrata bentik yang tergolong ke dalam empat kelas meliputi Gastropoda, Bivalvia, Clitellata, dan Insekta. Spesies Melanoides tuberculata memiliki kelimpahan tertinggi dengan nilai rata-rata sebesar 858 individu/m2. Keanekaragaman makroinvertebrata bentik tergolong rendah hingga sedang dengan nilai indeks Shanon Wiener (H’) berkisar 0,61-1,26. Nilai indeks kemerataan Pielou (E) berkisar 0,36-0,66, sedangkan indeks dominansi Simpson (D) berkisar 0,24-0,93.Katakunci:DominansiKomunitasKelimpahanKeanekaragamanMakroinvertebrata bentikSitu Cibuntu

In situ effects of titanium dioxide nanoparticles on community structure of freshwater benthic macroinvertebrates

2016 ◽  
Vol 213 ◽  
pp. 278-282 ◽  
Author(s):  
Boris Jovanović ◽  
Djuradj Milošević ◽  
Milica Stojković Piperac ◽  
Ana Savić
Keyword(s):  
Titanium Dioxide ◽  
Community Structure ◽  
Benthic Macroinvertebrates ◽  
Titanium Dioxide Nanoparticles

Benthic Macroinvertebrates Modify Copper and Zinc Partitioning in Freshwater–Sediment Microcosms

1985 ◽  
Vol 42 (9) ◽  
pp. 1465-1473 ◽  
Author(s):  
G. Krantzberg ◽  
P. M. Stokes
Keyword(s):  
Water Column ◽  
Benthic Macroinvertebrates ◽  
Benthic Community ◽  
Lake Ontario ◽  
Freshwater Sediment ◽  
Macroinvertebrate Communities ◽  
Burrowing Activity ◽  
Tubificid Worms ◽  
Cu And Zn

The effects of bioturbation on metal dynamics in freshwater–sediment systems were examined. In general, benthic macroinvertebrates caused significant changes in Cu and Zn partitioning among physicochemical forms in the sediment. The proportion of cation-exchangeable and specifically adsorbed Cu observed in Chub Lake (Muskoka–Haliburton) microcosms colonized by chironomids and chaoborids was greater than that for uncolonized sediment. The same relationship held for Cu in Lohi Lake (Sudbury) microcosms supporting a similar benthic community and for Cu and Zn in Port Credit (Lake Ontario) sediments inhabited by tubificids. The ability of tubificid worms to increase sediment Eh was recorded and related to Cu and Zn dynamics. We conclude that macroinvertebrate communities have the potential to increase metal concentrations in the water column, particularly during short episodes of high burrowing activity, and that in situ studies are warranted to verify this potentiality.

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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