Assessment of site specific benthic impact of floating cage farming in the eastern Hios island, Eastern Aegean Sea, Greece

Klaoudatos, Spyros; Klaoudatos, Dimitris; Smith, J. A.; Bogdanos, Konstantinos; Papageorgiou, E.

doi:10.1016/j.jembe.2006.07.002

Cited by 44 publications

(41 citation statements)

References 47 publications

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“…Previous investigations revealed that benthic assemblages can respond to fish-farm activities in terms of: (1) a decrease in abundance, biomass and species richness (Klaoudatos et al 2006, Tomassetti et al 2009), due to a selection of a few opportunistic species (Weston 1990); (2) a shift in the relative importance of the different trophic guilds (Pearson & Rosenberg 1978); (3) changes in the size of benthic organisms (Tsujino 1998); and (4) a shift in life strategies, with increasing relevance of opportunistic species (Bongers et al 1991, Mirto et al 2002.…”

Section: Introductionmentioning

confidence: 99%

Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non‑vegetated habitats

Mirto¹,

Arigo²,

Genovese³

et al. 2014

Aquacult. Environ. Interact.

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We investigated the impact of fish farming on the benthic biota of 2 habitats (seagrass meadows of Posidonia oceanica and non-vegetated soft bottoms), by examining in detail the nematode assemblages, and the effects of organic enrichment on their abundance, diversity (species richness and trophic diversity), community structure and individual size. All investigated faunal variables differed significantly between impact and control sediments, except for individual nematode biomass. Nematodes displayed reduced biodiversity beneath the investigated fish farms in both vegetated and non-vegetated habitats. The nematode genera Richtersia, Desmoscolex and Halalaimus were highly sensitive to biodeposition and disappeared almost completely in farm sediments, whereas other genera such as Daptonema and Prochromadorella largely increased their relative abundance. The impact of biodeposition was investigated also in terms of K-dominance curves and functional variables (life strategies as maturity index, and functional [i.e. trophic] diversity) which showed that nematodes are very sensitive to this kind of environmental disturbance. Our results indicate that the analysis of nematode assemblage composition, the life traits of the dominant species and the presence/disappearance of certain nematode species represent a reliable tool for monitoring the quality state of marine sediments exposed to fish-farm organic wastes.

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Section: Introductionmentioning

confidence: 99%

Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non‑vegetated habitats

Mirto¹,

Arigo²,

Genovese³

et al. 2014

Aquacult. Environ. Interact.

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“…Organic enrichment of the seabed is the most widely encountered effect of culturing fish in cages (Karakassis et al 2000, Karakassis et al 2002. Increasing organic load in sediments might have a strong effect on the structure of benthic communities (Karakassis et al 2000, Hyland et al 2005, Klaoudatos et al 2006, Yucel-Gier et al 2007). Deposition of organic material under the cages may cause changes in the composition of basic benthic communities in terms of abundance, dominance and species richness (Pearson & Rosenberg 1978, Wu et al 1994.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal effects of fish farming on benthic community structure in a semi-enclosed gulf of the Eastern Mediterranean

Neofitou

Vafidis²,

Klaoudatos³

2010

Aquacult. Environ. Interact.

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Spatial and temporal effects of fish farming on the benthic community structure at 2 fish farms in the Eastern Mediterranean were investigated between July 2004 and April 2005. In the area of each fish farm, 3 stations were sampled. At each station, sediment samples were collected for analysis of organic carbon, organic matter and benthic community parameters. There were statistically significant differences in organic matter and organic carbon among all stations. This impact seems to be only spatial, since 1-way ANOVA indicated no significant differences in organic matter and organic carbon between seasons for both farms. Furthermore, significant differences were found in species number, abundance and species richness among stations and seasons for one of the farms (2-way ANOVA). One-way ANOVA indicated that the significant differences, detected in the benthic community parameters of this farm, were spatio-temporal for species number, temporal for abundance and spatial for species richness. The spatial effect of fish farming on benthic community structure was present up to 50 m from the centre of cages on one farm and between 50 and 300 m from the other farm. Capitella capitata was the most dominant species at the farm sites, while Nephthys hystricis was the most dominant species at the control sites. In all cases, the benthic assemblages in the immediate vicinity showed symptoms of disturbance, but the spatial and temporal extent of this effect was less than one would expect considering the fact that the study area is located in a semi-enclosed gulf.

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“…As another example, Klaoudatos et al (2006) (Grassle & Grassle 1976 and see discussion above). While members of the C. capitata complex may be useful as indicator "species" for high organic input, the differentiation of species types within the complex is required to ensure the indicator species is actually a single species type and not a summation of several species.…”

Section: Polychaetes As Indicators Of Organic Enrichmentmentioning

confidence: 95%

“…As another example, Klaoudatos et al (2006), nosa). Is C. capitata a cosmopolitan indicator species for high organic input?…”

Section: Polychaetes As Indicators Of Organic Enrichmentmentioning

confidence: 99%

Cytochemical responses of Hediste diversicolor (Nereidae, Polychaete) sampled from polluted sites along the Tunisian coast

Bouraoui¹,

Ghedira²,

Caprì

et al. 2014

RGCI

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Polychaetes are usually the most abundant taxon in benthic communities and have been most often utilized as indicator species of environmental conditions. This review finds that, while the use of indicator species for a particular pollutant is not simple, polychaetes can provide a useful means of assessing the effects of poor environmental conditions. Polychaetes may be used as sensitive monitors of water quality especially in terms of the effects of pollutants on life history characteristics. They may also be utilized as general indicators of community diversity but those species indicative of lower diversity may differ geographically and temporally. While sewage is often a mixture of high organic material and other pollutants such as heavy metals and pesticides, high organic situations associated with aquaculture facilities indicates that members of the Capitella capitata species complex and the dorvilleid genus Ophryotrocha are often dominant. Some species of polychaetes are able to live in sediments very high in trace metal content and body burden of these metals often does not reflect sediment concentrations due to regulation by these species. Many species seem relatively resistant to organic contaminants and pesticides and the effects of these pollutants on life history characteristics of these species may provide a more sensitive assay method. Recent studies using biomarkers in polychaetes to indicate general heavy metal or pesticide contamination has shown some success. Polychaete species known to occur in appreciable densities in the Gulf of Nicoya, Costa Rica, and which have been most often used as indicator species of pollution, are listed as potential taxa for environmental monitoring in this tropical estuary. Rev. Biol. Trop. 56 (Suppl. 4): 11-38. Epub 2009 June 30.Key words: polychaete, indicator species, marine pollution, community diversity, heavy metals, pesticides, organics, biomarkers, tropical, Costa Rica.The polychaetes have long been an obvious choice to act as representative species in the analysis of the health of benthic communities as they are usually the most abundant taxon taken in benthic samples, both in terms of the number of species and numerical abundance. Additionally, unlike nektonic or reptant organism, the polychaetes usually live within the sediments or attached to hard surfaces and, while their larvae may be capable of long distance transport, the adults are relatively inert. This relative immobility ensures chronic exposure to any toxic materials in the environment rather than the episodic exposures of a more vagile organism. Any long-term changes in the wellbeing of the benthos should be reflected in the polychaete community .The life history characteristics of polychaetes also make them good candidates to act as indicator species. The epibenthic filter feeders maximize their exposure to any harmful materials within the water column as they process relatively large amounts of water during feeding. Deposit feeding and interstitial species, which are in intimate c...

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Assessment of site specific benthic impact of floating cage farming in the eastern Hios island, Eastern Aegean Sea, Greece

Cited by 44 publications

References 47 publications

Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non‑vegetated habitats

Nematode assemblage response to fish-farm impact in vegetated (Posidonia oceanica) and non‑vegetated habitats

Spatial and temporal effects of fish farming on benthic community structure in a semi-enclosed gulf of the Eastern Mediterranean

Cytochemical responses of Hediste diversicolor (Nereidae, Polychaete) sampled from polluted sites along the Tunisian coast

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