Nematodes as indicators of shrimp farm impact on an amazonian estuary (Curuçá, Pará, Brazil)

Venekey, Virág; Melo, Tatianne Pereira Gomes de

doi:10.1590/s1679-87592016108206401

Cited by 11 publications

(4 citation statements)

References 49 publications

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“…However, work by Mirto et al (2010) in the Mediterranean found that meiofaunal abundances may increase or decrease based on the site and farm characteristics, which was later supported by Mirto et al (2012). Nematode abundance has also shown no change due to aquaculture perturbance in other areas of the world (see Venekey and de Melo, 2016). Research has suggested, however, that shifts in nematode assemblage compositions may be more informative than generalized abundance data.…”

Section: Nematodes As Indicators Of Aquaculture Pollutionmentioning

confidence: 93%

Suitability of Free-Living Marine Nematodes as Bioindicators: Status and Future Considerations

Ridall

Ingels

2021

Front. Mar. Sci.

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Nematodes are among the most abundant organisms on Earth, and have important roles in terrestrial, freshwater, and marine ecosystems. Free-living marine nematodes have been used successfully as indicators of biological health and ocean pollution for at least the past 40 years, but their use as bioindicators is not ubiquitous. They have been most often used specifically as indicators of heavy metal and hydrocarbon pollution, with far fewer instances of their use as indicators of biological, environmental, or physical perturbations. Although free-living marine nematodes are among the best bioindicators owing to their worldwide distributions, abundances, and genus- and species-specific responses to environmental pollution, there are still some challenges that prevent their use globally. Here, we present a review of characteristics that make free-living marine nematodes excellent bioindicators, recent studies that have used them as bioindicators, and suggestions for future directions in the use of these fauna as indicators in the marine environment. Specifically, we consider the use of marine nematodes for microplastics (an understudied class of pollutants that are a future threat to global biodiversity), the value of current nematode indices as measures of ecosystem health, and the importance of improved and continued international collaboration in the field of marine nematology.

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Section: Nematodes As Indicators Of Aquaculture Pollutionmentioning

confidence: 93%

Suitability of Free-Living Marine Nematodes as Bioindicators: Status and Future Considerations

Ridall

Ingels

2021

Front. Mar. Sci.

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“…In Santos (Braga et al, 2000;Aguiar and Braga, 2007) and Curuça Estuarine Systems (Venekey and de Melo, 2016), fecal sterols, fecal coliforms, and high loads of nutrients are higher near industrial estates, farms, and cities, revealing a strong sewage contamination. High levels of eutrophication and thermotolerant coliforms are observed in the upper reaches of the Caeté Estuary during the dry season, however, water quality might improve during the rainy season (Monteiro et al, 2016a,b).…”

Section: Sewage Contamination and Eutrophicationmentioning

confidence: 99%

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Barletta

Lima

2019

Front. Mar. Sci.

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Research on estuarine ecology in South America (SA) increased quali-quantitatively since the early 1980 in search of consistent recommendations for estuarine conservation. The most important ecological theory achieved is that the seasonal fluctuation of the salinity gradient creates an ecocline influenced by gradual changes between river-dominated to marine-like waters. Estuarine fish fauna adapts to these changeable abiotic characteristics, including the spatial, and seasonal bioavailability of dissolved oxygen and numerous pollutants. However, studies on the influence of the estuarine ecocline are still missing for key estuarine systems. This study provides an overview of fish ecology and anthropogenic impacts within estuarine systems of SA and discusses priorities for environmental conservation. Research on fish reached important conclusions regarding essential habitats and fish interaction with other biological and abiotic compartments over spatio-temporal settings, including conditions of severe anthropogenic impacts. These impacts are related to unplanned urban settlements, industrial estates, ports, damming of major rivers, dredging activities, and deforestation for extensive farming. Changes in estuarine morphology alter natural flows and lead to habitat losses, disrupting the ecocline and impairing fishes from moving among formerly connected habitats, especially earlier ontogenetic phases. In addition, industrial, urban, and farming activities often result in high loads of metals and persistent organic pollutants, organic enrichment and oxygen depletion. Moreover, plastic debris, a ubiquitous contaminant with sources on every human activity, including fishing, when fragmented into microplastics, become preferably concentrated in semi-enclosed environments, as estuaries. Metals, POPs and microplastics are actually asserted to be persistent. When in high concentrations, they become bioavailable to the estuarine trophic web through bioaccumulation, being biomagnified or biotransfered toward higher trophic level organisms, such as top predator fishes. Therefore, research on environmental quality and fish ecology must be based on robust sampling designs along the whole ecocline using long-term approaches. In addition, basic sanitation, co-management, an improved Barletta and Lima Ecology and Conservation of South American Estuaries licensing system and scientifically-based risk assessments/monitoring for all sorts of enterprise are also urgent. These conservation priorities need to be in place before human-driven changes surpass the ecosystem's capacity to produce resources and maintain services.

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“…Environmental parameters are presented as mean ± standard deviation whenever appropriate; D.N= deposit number. Bezerra et al, 2013;Pastor de Ward et al, 2015;Venekey & Melo, 2016;Thai et al, 2017). There are records of the subfamily Ethmolaiminae in estuarine and inland waters, while the subfamily Neothonchinae was previously recorded only in marine waters (Bezerra et al, 2013).…”

Section: Gomphionema Wieser and Hopper 1966mentioning

confidence: 99%

“…There are records of the subfamily Ethmolaiminae in estuarine and inland waters, while the subfamily Neothonchinae was previously recorded only in marine waters (Bezerra et al, 2013). Gomphionema is typically found on marine (Semprucci et al, 2013), and brackish waters from estuaries and mangroves in salinity as low as 7 (Venekey & Melo, 2016;Thai et al, 2017). This genus currently has five species described and still is poorly studied (Bezerra et al, 2020).…”

Section: Gomphionema Wieser and Hopper 1966mentioning

confidence: 99%

Marine free-living nematodes in semiarid inland waters

et al. 2021

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Aim This study reports the occurrence of five Nematoda genera previously considered as exclusively marine in inland waters. Methods Sediment samples were taken, weekly, during nine weeks, at a small spring at the Horto Florestal Olho D’Água da Bica, Cuité, PB, ca. 130 km away from the shoreline, between March and May 2016 and fixed in 4% formalin. Nematodes were sorted by manual elutriation through sieves with 0.5 and 0.045 mm and slides were prepared. Results The sediment was classified as coarse sand, with organic matter content ranging between 2.73 and 13.32%, temperature between 27-28°C and constant salinity of 6. From 315 nematodes were sampled among which 18 were from five genera previously thought to be exclusively marine were found. Bolbolaimus was the most common, found in 11.1% of the samples, followed by Gomphionema (3.7%), Rynchonema (7.4%), Prorynchonema (7.4%) e Sabatieria (3.7%), representing 5.7% from total of nematofauna. These genera are widely distributed worldwide, but had never been recorded from inland environments. Conclusions This study contributes with the distributional knowledge of free-living nematodes. From literature data, these genera are not restricted by low salinity, and can be found in estuarine and/or brackish water environments and body water with direct connection to the sea. In any case, the presence of marine genera in this region which is >130 km away from the nearest shoreline is noteworthy, highlighting the importance of studying nematodes from these poorly known semiarid water bodies. These new occurrences raise questionings about the dispersal mechanisms that certified the colonization of these nematodes in the semiarid.

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Nematodes as indicators of shrimp farm impact on an amazonian estuary (Curuçá, Pará, Brazil)

Cited by 11 publications

References 49 publications

Suitability of Free-Living Marine Nematodes as Bioindicators: Status and Future Considerations

Suitability of Free-Living Marine Nematodes as Bioindicators: Status and Future Considerations

Systematic Review of Fish Ecology and Anthropogenic Impacts in South American Estuaries: Setting Priorities for Ecosystem Conservation

Marine free-living nematodes in semiarid inland waters

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