scholarly journals Shifts in Estuarine Macroinvertebrate Communities Associated With Water Quality and Climate Change

2021 ◽  
Vol 8 ◽  
Author(s):  
Thomas Goulding ◽  
Pedro M. Sousa ◽  
Gilda Silva ◽  
João Paulo Medeiros ◽  
Frederico Carvalho ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Benthic Invertebrate ◽  
Biotic Index ◽  
Macroinvertebrate Communities ◽  
Benthic Species ◽  
Assessment Period ◽  
Ecological Quality Status ◽  
Benthic Invertebrate Communities ◽  
Quality Status

The present work aims to identify changes in the macroinvertebrate community of the Tagus estuary (Portugal) due to improvements in water quality and to climate change. Data was collected over a period of 16 years (1998–2014) from different sites located along the estuarine gradient. The AZTI Marine Biotic Index (AMBI) was used to assess the ecological quality status based on benthic invertebrate communities and identify possible variations associated with changes in water quality. The overall distribution of each species was examined to detect possible changes associated with climate, based on species’ affinity for more temperate or subtropical climates. Results demonstrate that there was an overall improvement of AMBI scores during the assessment period. The analysis of the geographical distribution of benthic species seems to indicate that there has been an increase of species which prefer subtropical climates in the shallower waters of the estuary, whereas in the deeper estuarine sections the propensity is for species that prefer temperate climates.

scholarly journals The THE ECOLOGICAL QUALITY STATUS OF THE ORGANIC SHRIMP FARMING PONDS: USE OF A NEW BIOTIC INDICES

2018 ◽  
Vol 34 (2) ◽  
Author(s):  
Trần Thành Thái
Keyword(s):  
Farming Systems ◽  
Shrimp Farming ◽  
Food Sources ◽  
Biotic Index ◽  
Natural Food ◽  
Ecological Quality ◽  
Wet Season ◽  
Tropical Regions ◽  
Ecological Quality Status ◽  
Quality Status

In spite of the development and widespread dissemination of the model organic shrimp farming systems, the biological communities in the organic shrimp farming ponds have still very limited. Therefore, we conducted a field survey for macrobenthic communities (MC) of the Tam Giang‘s organic shrimp farming ponds (TGOSFP) located in Tam Giang commune, Nam Can district, Ca Mau province during three seasons in 2015 (March - dry, July - transfer and November - wet season). The results indicated that the MC have characterized by high density and slightly diversity that is a rich natural food sources for shrimp in the TGOSFP. Further more, the present study is a first attempt to use of new indices (AMBI - AZTI’s Marine Biotic Index) on MC for determining the ecological quality status of sediment (EcoQ) in the TGOSFP. The following results were also recorded with an undisturbed and slightly disturbed  EcoQ in the TGOSFP and the general EcoQ would likely be improved between three seasons. The success of AMBI for detecting EcoQ in Vietnam is specific to this study, but AMBI was likely to improved, in particular tropical regions.

scholarly journals Community structure of benthic macroinvertebrate fauna of river Ichamati, India

2018 ◽  
Vol 10 (8) ◽  
pp. 12044
Author(s):  
Arnab Basu ◽  
Indrani Sarkar ◽  
Siddartha Datta ◽  
Sheela Roy
Keyword(s):  
Benthic Community ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Benthic Invertebrate ◽  
Benthic Macroinvertebrate ◽  
Macroinvertebrate Communities ◽  
Habitat Conditions ◽  
Invertebrate Communities ◽  
Benthic Invertebrate Communities ◽  
Hydrological Variables

Benthic macroinvertebrate communities are frequently applied as indicators of aquatic ecosystem health as many species are responsive to pollution and abrupt changes in their surroundings.  The qualities of benthic invertebrate communities greatly depend on habitat conditions.  Thus the diversity in benthic community varies with different habitat conditions.  This investigation on the structure of the benthic invertebrate communities was conducted on river Ichamati, a trans-boundary river between India and Bangladesh to assess the cumulative effects of water quality on the aquatic biota.  The study period extended from February 2011 to January 2014 at three sites from Majdiah to Hasanabad (in West Bengal, India) a stretch of 124km.  A total of 23 macrobenthic species belonging to three phyla, five classes and nine orders were identified.  Fifteen species of benthic invertebrates belonging to Mollusca, three species under Annelida and five species under Arthropoda were found.  The highest abundance density (3633.33 indiv.m-2) and species richness (18 species) were recorded up-stream (Majdiah) where marginal habitats covered by macrophytes were significantly higher than at other sites.  Both the organic carbon (4.41±1.11) and organic matter (7.48±1.56) of soil at this site were the maximum thus influencing the richness of benthic macroinvertebrate communities.  Hydrological variables, viz, dissolved oxygen, pH, alkalinity; hardness, salinity, nutrients, calcium, and magnesium were studied to determine their influences on the benthic community in the upper, middle- and down-streams of the river, respectively.  Shannon’s diversity index (0.95–2.07; 0.00–0.72; 0.00–0.64), dominance index (0.57–0.86; 0.00–0.44; 0.00–0.44), evenness index (0.72–0.95; 0.61–1.00; 0.00–1.00), Margalef index (0.72–2.23; 0.00–1.32; 0.00-0.28) of the upper, middle- and down-streams were calculated. Benthic macroinvertebrate density was correlated with hydrological variables which indicated that the abiotic factors had either direct or inverse influence on the richness and abundance; however, the abiotic factors did not correlate identically in all three sites. 

scholarly journals Are the streams of the Sinos River basin of good water quality? Aquatic macroinvertebrates may answer the question

2010 ◽  
Vol 70 (4 suppl) ◽  
pp. 1207-1215 ◽  
Author(s):  
L. Bieger ◽  
ABP Carvalho ◽  
MN Strieder ◽  
L. Maltchik ◽  
C Stenert
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Working Party ◽  
Aquatic Macroinvertebrates ◽  
Biotic Index ◽  
Biotic Indices ◽  
Macroinvertebrate Communities ◽  
Score System ◽  
One Year

Macroinvertebrate communities are one of the most used groups in assessments of water quality, since they respond directly to the level of contamination of aquatic ecosystems. The main objective of this study was the assessment of the water quality of the Sinos River basin (Rio Grande do Sul state, Brazil) through biotic indices based on the macroinvertebrate community ("Family Biotic Index - FBI", and "Biological Monitoring Working Party Score System - BMWP"). Three lower order streams (2nd order) were selected in each one of three main regions of the basin. In each stream, the samplings were performed in three reaches (upper, middle, and lower), totalling 27 reaches. Two samplings were carried in each reach over one year (winter and summer). A total of 6,847 macroinvertebrates distributed among 54 families were sampled. The streams from the upper region were of better water quality than the lower region. The water quality did not change between the upper, middle and lower reaches of the streams. However, the upper reaches of the streams were of better water quality in all the regions of the basin. The water quality of the streams did not vary between the summer and the winter. This result demonstrated that water quality may be analysed in both studied seasons (summer and winter) using biotic indices. The analysis of the results allows us to conclude that the biotic indices used reflected the changes related to the water quality along the longitudinal gradient of the basin. Thus, aquatic macroinvertebrates were important bioindicators of the water and environmental quality of the streams of the Sinos River basin.

scholarly journals Evaluating the Applicability of Phytoplankton Community Indices in Assessing The Ecological Quality Status (EcoQS) of a Coastal Ecosystem (Thane Creek, India): Mono-Metric vs Multi-Metric Approach

2021 ◽  
Author(s):  
Revati Hardikar ◽  
Haridevi Chanjaplackal Kesavan ◽  
Shantaj Deshbhratar
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
Environmental Quality ◽  
Quality Index ◽  
Phytoplankton Community ◽  
Ecological Quality ◽  
Water Quality Improvement ◽  
Ecological Quality Status ◽  
Thane Creek ◽  
Quality Status

Abstract The ecological quality status (EcoQS) of Thane Creek which is surrounded by a highly urbanized and industrialized sector of Mumbai was assessed by considering six phytoplankton community indices. Sampling was carried during Premonsoon to compare the efficiency of selected indices (Chl a, abundance, H′, MDI, IPI and MMPI) in the tropical setting. Ecostatus proposed by selected phytoplankton indices assigned a 'moderate-good' status to phytoplankton zone (PZ)-I, 'moderate-poor' to PZ-II while 'bad' to PZ-III. Comparatively, MMPI appeared to be the most efficient water quality index because of its capability in discriminating between 'acceptable' and 'not-acceptable' EcoQS. The gradient of anthropic activities along the creek plays a major role in deciding the EcoQS of Thane Creek. Limitations of all indices in evaluating environmental quality were also discussed in the present study. The investigation could provide a fillip to policymakers who are undertaking coastal water quality improvement initiatives.

Impacts of altered benthic invertebrate communities on the feeding ecology of yellow perch (Perca flavescens) in metal-contaminated lakes

2005 ◽  
Vol 62 (1) ◽  
pp. 153-162 ◽  
Author(s):  
J Kövecses ◽  
G D Sherwood ◽  
J B Rasmussen
Keyword(s):  
Yellow Perch ◽  
Size Structure ◽  
Perca Flavescens ◽  
Stomach Contents ◽  
Benthic Invertebrate ◽  
Taxonomic Composition ◽  
Benthic Macroinvertebrate ◽  
Macroinvertebrate Communities ◽  
Trophic Links ◽  
Benthic Invertebrate Communities

Metal contamination can disrupt trophic links in food webs by altering the taxonomic composition and size structure of benthic macroinvertebrate communities. Benthic macroinvertebrates and yellow perch (Perca flavescens) were collected from six lakes along a gradient of cadmium (Cd) and copper (Cu) contamination in Quebec, Canada. The two most contaminated lakes had significantly lower densities of several benthic macroinvertebrate taxa and significantly lower Shannon's index than less contaminated lakes. The stomach contents of perch from the most contaminated lakes were less diverse, with a greater reliance on chironomids and (or) zooplankton than perch from other study lakes. The size of prey in perch from the most contaminated lakes did not increase with age and the mean prey size was smaller than in other, less contaminated lakes. Perch from lakes with medium to low levels of contamination weighed significantly more than perch from lakes with high levels of contamination. This reduction in growth is attributed to the increased costs of foraging on a simplified prey base in metal-contaminated systems.

scholarly journals A A COMPARISON OF THE APPLICABILITY OF THE SHANNON-WIENER, AMBI AND M-AMBI INDEX FOR ASSESSING ECOLOGICAL QUALITY STATUS OF SEDIMENT IN AN ORGANIC SHRIMP FARMING PONDS, NAM CAN DISTRICT, CA MAU PROVINCE

2018 ◽  
Vol 34 (3) ◽  
Author(s):  
Tran Thanh Thai ◽  
Le Hai Dang ◽  
Ngo Xuan Quang
Keyword(s):  
Environmental Variables ◽  
Wiener Index ◽  
Shrimp Farming ◽  
Biotic Index ◽  
Ecological Quality ◽  
H Index ◽  
Ecological Quality Status ◽  
Quality Status

The Shannon-Wiener Index (H′), AZTI’s Marine Biotic Index (AMBI) and multivariate AMBI (M-AMBI) were applied as a comparative applicability in assessing the ecological quality status of sediment (EcoQ) of eight an organic shrimp farming ponds (OSFP), Ca Mau province. There were obvious differences between the evaluation results of three indices in the eight OSFPs through three seasons. The EcoQ given by the AMBI and M-AMBI were higher than that given by the H’ index. These indicated that H’ index may also be more sensitive to environment disturbances than the AMBI and M-AMBI. Furthermore, the EcoQ given by the M-AMBI was a neutralization between that given by the H’ and AMBI indices. Because there are no environmental variables data available in this study, the H′ index was really more sensitive to environment disturbances than the AMBI and M-AMBI, that have yet to be fully elucidated. A analyses three indices with environmental variables gradient data also need further investigation to potentially increase the precise answer of this issue.

Green tides on inter- and subtidal sandy shores: differential impacts on infauna and flatfish

2017 ◽  
Vol 98 (4) ◽  
pp. 699-712 ◽  
Author(s):  
N. Quillien ◽  
M. C. Nordström ◽  
H. Le Bris ◽  
E. Bonsdorff ◽  
J. Grall
Keyword(s):  
Marine Species ◽  
Benthic Invertebrate ◽  
Anthropogenic Pressure ◽  
Macroinvertebrate Communities ◽  
Green Tides ◽  
Sandy Shores ◽  
Commercially Important ◽  
Species Specific ◽  
Benthic Invertebrate Communities ◽  
Analytical Approaches

Beach ecosystems extend from dune to offshore areas along most coasts, and provide essential services that are not provided by any other ecosystem. Indeed, sandy systems contain unique biodiversity and supply nursery and foraging areas for numerous commercially important marine species, such as flatfish. However, these systems are threatened by increasing anthropogenic pressure. Green tides (GT, i.e. accumulations of green opportunistic macroalgae) are a major human-induced threat to marine ecosystems, from inshore to nearshore. This eutrophication process greatly affects both benthic invertebrate communities and flatfish communities, within sheltered and non- or microtidal systems. However, the responses of dynamic open macrotidal sandy systems to eutrophication in the form of macroalgal mats are not yet fully understood. In particular, understanding the effects of GT on two connected biological compartments (infauna and flatfish) within two connected habitats (intertidal and subtidal) is crucial. Here, we set out to assess the influence of several environmental variables, including Ulva biomass, on the variability in infauna and flatfish communities in both the intertidal and the subtidal at four sites impacted or not by GT. In total, 110 biodiversity samples were analysed with classic and novel analytical approaches. Our results demonstrate that the presence of GT specifically impacts intertidal macroinvertebrate communities. However, small effects of GT on subtidal infauna communities, as well as on species-specific flatfish at both intertidal and subtidal, were still detectable. Our findings underline the vulnerability of highly dynamic ecosystems exposed to anthropogenic stress, in particular intertidal sandy shores.

scholarly journals Application of the bentix index in assessing ecological quality of hard substrata: a case study from the Bosphorus Strait, Turkey

2007 ◽  
Vol 8 (1) ◽  
pp. 15 ◽  
Author(s):  
E. KALKAN ◽  
S.U. KARHAN ◽  
E. MUTLU ◽  
N. SIMBOURA ◽  
M. BEKOLET
Keyword(s):  
Biotic Index ◽  
Ecological Quality ◽  
Ecological Quality Status ◽  
Significant Difference ◽  
Benthic Ecosystems ◽  
Bosphorus Strait ◽  
Sewage Discharges ◽  
Quality Status

In this paper, a biotic index (Bentix) has been used for the assessment of ecological quality status of shallow water hard substrate benthic ecosystems affected by coastal sewage discharges in the Bosphorus Strait. A significant difference was observed between the control and the discharge stations with regard to Bentix values (Mann-Whitney U Test, p=0.002) and ecological quality status of the discharge stations was worse than that of controls. The index values revealed that sewage discharges caused serious disturbance in macrozoobenthic communities in the area investigated. Although so far it has been used for soft bottom communities, Bentix (with some species scoring modifications) also appeared to work successfully in hard substrates, at least for the present study.

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