scholarly journals How Surface Water Management Can Benefit Fish Conservation in Urban Streams

2021 ◽  
Vol 12 (2) ◽  
pp. 383-394
Author(s):  
W. Aaron Wilson ◽  
Maria Wipfler ◽  
Josh Stevens
Keyword(s):  
Water Management ◽  
Species Richness ◽  
Fish Community ◽  
Municipal Wastewater ◽  
Urban Stream ◽  
Wastewater Management ◽  
Impervious Cover ◽  
Management Interventions ◽  
Community Metrics ◽  
Fish Community Metrics

Abstract We analyzed 33 y of fish community data collected from a low-order, urban stream in central Illinois, USA, to determine the effects of municipal wastewater management projects and urbanization on fish communities. From 1985 to 2017, species richness, number of pollution-intolerant species, and alternative index of biotic integrity significantly increased at sites across this system. Species diversity likewise increased, but was mostly significant only at sites downstream of the effluent outflow. Ceasing the chlorination of wastewater in 1990 resulted in significant increases in fish community metrics both upstream and downstream of effluent outflow, although effects varied from site to site. Completing a combined sewer overflow abatement project in 2008 resulted in some significant increases in species richness, diversity, and number of pollution-intolerant species at sites downstream of effluent outflow. From 2001 to 2016, the change in the number of pollution-intolerant species correlated inversely with the increased percentage of impervious cover in the study system. There was no significant correlation of other metrics with the change in percent impervious surfaces. These results suggest that urbanization at upstream sites limited to some extent the benefits of water management interventions that improved fish community metrics at downstream sites.

scholarly journals Short-term changes in reef fish community metrics correlate with variability in large shark occurrence

Food Webs ◽  
2020 ◽  
Vol 24 ◽  
pp. e00147
Author(s):  
Chelsea M. Brown ◽  
Avery B. Paxton ◽  
J. Christopher Taylor ◽  
Rebecca V. Van Hoeck ◽  
Michael H. Fatzinger ◽  
...  
Keyword(s):  
Reef Fish ◽  
Fish Community ◽  
Short Term ◽  
Community Metrics ◽  
Reef Fish Community ◽  
Fish Community Metrics

scholarly journals Testing candidate indicators to support ecosystem-based management: the power of monitoring surveys to detect temporal trends in fish community metrics

2004 ◽  
Vol 61 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Mike D Nicholson ◽  
Simon Jennings
Keyword(s):  
Community Structure ◽  
Time Scales ◽  
Fish Community ◽  
Temporal Trends ◽  
Fish Stock ◽  
Trawl Survey ◽  
Fish Community Structure ◽  
Ecosystem Based Management ◽  
Community Metrics ◽  
Fish Community Metrics

Abstract Community metrics describe aspects of community structure and are often calculated from species-size-abundance data collected during fish stock monitoring surveys. Several community metrics have been proposed as indicators to support ecosystem-based fishery management. These metrics should be sensitive to fishing impacts and respond rapidly to management action, so that managers can assess whether changes in the fish community are a desirable or undesirable response to management. It should also be possible to estimate metrics with sufficient precision so that changes in the community can be detected on management time scales of a year to a few years. Here, we test the power of a large-scale annual trawl survey (North Sea International Bottom Trawl Survey, IBTS) to detect trends in six community metrics: mean length, mean weight, mean maximum length, mean maximum weight, slope of the biomass size spectrum, and mean trophic level. Our analyses show that the power of the trawl survey to detect trends is generally poor. While community metrics do provide good long-term indicators of changes in fish community structure, they are unlikely to provide an appropriate tool to support short-term management decisions. If fish community metrics are to provide effective support for ecosystem-based management, and management time scales cannot be extended, then the power of many surveys to detect trends in fish community structure will need to be improved by increased replication and standardization.

Macroinvertebrate and Fish Community Metrics: Confounding Effects and Consistency over Time

Wetlands ◽  
2020 ◽  
Vol 40 (5) ◽  
pp. 1107-1116
Author(s):  
Katya E. Kovalenko ◽  
Valerie J. Brady ◽  
Jan J.H. Ciborowski ◽  
George E. Host ◽  
Lucinda B. Johnson
Keyword(s):  
Fish Community ◽  
Community Metrics ◽  
Fish Community Metrics ◽  
Over Time

scholarly journals Municipal wastewater can result in a dramatic decline in freshwater fishes: a lesson from a developing country

2018 ◽  
pp. 37 ◽  
Author(s):  
Shams M. Galib ◽  
A.B.M. Mohsin ◽  
Md. Taskin Parvez ◽  
Martyn C. Lucas ◽  
Nipa Chaki ◽  
...  
Keyword(s):  
Species Richness ◽  
Municipal Wastewater ◽  
Primary Treatment ◽  
Fish Abundance ◽  
Wastewater Management ◽  
Wastewater Discharge ◽  
Untreated Wastewater ◽  
Dramatic Decline ◽  
Downstream Reach ◽  
Treatment Facilities

Impacts of ineffective wastewater management on the biodiversity of receiving waters in developing countries are poorly documented. Using a before-after-control-impact methodology, we measured the effects of untreated wastewater release on the fish community in the Barnoi River, Bangladesh. In 2006, prior to untreated wastewater discharge, fish abundance, species richness and water quality were similar across sampling sites. In 2016, after 8 years of wastewater release to the downstream reach, fish abundance and species richness were reduced by >47% and >35% respectively at downstream sites compared to unaffected upstream sites and >51% and >41% lower respectively compared to the pre-wastewater discharge period. The wastewater impact was particularly severe during months of low discharge (October–December). Water transparency, dissolved oxygen and pH were lower (P < 0.001) at impacted downstream sites compared to upstream sites. Nineteen species (41.3% of all species we recorded) are threatened in Bangladesh and the abundance of these species, except one, decreased significantly (P < 0.05) at the impacted sites. We recommend improved wastewater management by applying primary treatment facilities and incorporating reedbed filtration as a mean of biological treatment, into the canals carrying wastewaters. The success of such measures should be tested with fish species that were most responsive to wastewater, using the indicator species concept.

Dominance determines fish community biomass in a temperate seagrass ecosystem

2019 ◽  
Author(s):  
Aaron Matthius Eger ◽  
Rebecca J. Best ◽  
Julia Kathleen Baum
Keyword(s):  
Species Richness ◽  
Ecosystem Function ◽  
Fish Community ◽  
Prey Capture ◽  
Fish Communities ◽  
Functional Trait ◽  
Ecosystem Functions ◽  
Community Biomass ◽  
Ecosystem Valuation ◽  
Species Abundances

Biodiversity and ecosystem function are often correlated, but there are multiple hypotheses about the mechanisms underlying this relationship. Ecosystem functions such as primary or secondary production may be maximized by species richness, evenness in species abundances, or the presence or dominance of species with certain traits. Here, we combined surveys of natural fish communities (conducted in July and August, 2016) with morphological trait data to examine relationships between diversity and ecosystem function (quantified as fish community biomass) across 14 subtidal eelgrass meadows in the Northeast Pacific (54° N 130° W). We employed both taxonomic and functional trait measures of diversity to investigate if ecosystem function is driven by species diversity (complementarity hypothesis) or by the presence or dominance of species with particular trait values (selection or dominance hypotheses). After controlling for environmental variation, we found that fish community biomass is maximized when taxonomic richness and functional evenness is low, and in communities dominated by species with particular trait values – those associated with benthic habitats and prey capture. While previous work on fish communities has found that species richness is positively correlated with ecosystem function, our results instead highlight the capacity for regionally prevalent and locally dominant species to drive ecosystem function in moderately diverse communities. We discuss these alternate links between community composition and ecosystem function and consider their divergent implications for ecosystem valuation and conservation prioritization.

scholarly journals Hauled liquid waste as a pollutant of soils and waters in Poland

2016 ◽  
Vol 48 (2) ◽  
pp. 111-122
Author(s):  
Agnieszka Karczmarczyk
Keyword(s):  
Rural Areas ◽  
Municipal Wastewater ◽  
System Analysis ◽  
Wastewater Treatment Plants ◽  
Ecological Status ◽  
Liquid Waste ◽  
Point Sources ◽  
Wastewater Management ◽  
Municipal Wastewater Treatment ◽  
Sources Of Pollution

Abstract Hauled liquid waste as a pollutant of soils and waters in Poland. Improperly maintained holding tanks are often underestimated source of contamination of soil, groundwater and surface water. As a rule, wastewater stored in holding tanks, should be transported and treated in municipal wastewater treatment plants (WWTPs). There are 2,257,000 holding tanks in Poland, located mainly in rural areas. The article presents the results of analysis of wastewater management in 20 rural and urban-rural communes, which were chosen at random from the total number of 2,174 communes in Poland. The only criterion of commune selection was total or partial lack of sewerage system. Analysis of the collected data showed that on average only 27% of liquid waste from holding tanks ended at the WWTPs. The median is even lower and amounts to 17.5%. More than 4,000 Mg of P and 26,000 Mg of N is dispersed in the environment in uncontrolled manner. Those diffuse point sources of pollution may be one of the reasons in the difficulty of achieving of good ecological status of rivers and affect the quality of the Baltic Sea.

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