Coastal eutrophication: recent developments in definitions and implications for monitoring strategies

Andersen, Jesper H.; Schlüter, Louise; Ærtebjerg, Gunni

doi:10.1093/plankt/fbl001

Cited by 153 publications

(88 citation statements)

References 21 publications

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“…Nevertheless, coastal habitats are threatened by anthropogenic stressors, including coastal development and habitat degradation [6]- [9]. Indeed, many human activities (pollution, tourism, clam harvesting, bait digging, commercial fisheries, eutrophication, sediment discharge, sand extraction and marine transportation) have directly and indirectly affected the biodiversity of these ecosystems on a worldwide scale [10]- [13]. As a result, many species and habitats are in jeopardy [14], considering that degradation has modified coastal habitats to such a degree that they no longer fulfill their functional roles as nurseries, in feeding or in reproduction [15] [16].…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Structures of the Macrozoobenthos from the Intertidal Zone of the Kneiss Islands (Central Mediterranean Sea)

Mosbahi¹,

Pezy²,

Dauvin³

et al. 2016

OJMS

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The present study analyses the spatio-temporal variability of the macrozoobenthos from the intertidal zone of the Kneiss Islands (Gulf of Gabès, Tunisia). Samples were collected once from 34 stations, while seasonal variations were studied by sampling four times at 12 stations over the period 2013-2014. A total of 159 macrobenthos taxa associated with intertidal Zostera noltei beds are identified from the 34 stations, with a taxonomic dominance of crustaceans (32%), molluscs (29%) and annelids (27%). Abundance varies from 9244 to 36,844 ind·m −2 with a mean value of 14,346 ind·m −2 . Analysis of the trophic structure shows that the majority of stations are strongly represented by carnivores (41%), followed by the non-selective deposit feeders (16%). Cluster analysis and multidimensional scaling allow identification of three main benthic assemblages based on species abundance, corresponding to different sediment types and organic matter contents. The seasonal variability in abundance, diversity and community structure is mainly due to spring and summer recruitment. The biotic indices (i.e. AMBI, BO2A and BENTIX) show that the intertidal area of Kneiss Islands exhibits a good ecological status.

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Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Structures of the Macrozoobenthos from the Intertidal Zone of the Kneiss Islands (Central Mediterranean Sea)

Mosbahi¹,

Pezy²,

Dauvin³

et al. 2016

OJMS

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“…This nutrient enrichment can cause disturbance to the structure, function and stability of organisms present in the water and the quality of the water itself (ANDERSEN et al, 2006). In Curuçá estuary the concentrations of organic matter (always less than 0.48%) were low as compared to those of other localities, either impacted (e.g.…”

Section: Discussionmentioning

confidence: 99%

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

Venekey

Melo

2016

Braz. j. oceanogr.

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Shrimp farming reduces demand on wild fishery stocks and avoids environmental damage resulting from fishing practices, however, it has the potential to affect the water quality if not properly managed. In this study the impacts of a shrimp farm in an Amazonian estuary were evaluated, focusing on changes in nematodes regarding taxonomic composition, richness, density and diversity. Sampling was conducted in August 2004 (dry season) and January 2005 (rainy season) in the river at stations situated upstream and downstream at different distances from the main source of farm effluent discharge. Thirty-eight genera were recorded with Terschellingia dominating in the dry season and Terschellingia, Daptonema, Ptycholaimellus and Gomphionema in the rainy season. Abundances were within the range recorded in other estuaries and together with genera richness and diversity showed a strong temporal pattern with significantly higher values in the rainy season. No clear patterns of changes were observed at the stations. Some signs of organic enrichment were detected but they were not yet intense, probably a consequence of the strong local hydrodynamics and the age of the shrimp farm, which was just starting its operation. We recommend that in future studies on farming impacts a combination of factors, beyond the physical and chemical parameters of the water and sediments or taxonomic refinement, should be taken into accountsuch as the duration of the operation of the farm, the area occupied by ponds and the farm's production. Furthermore, we also believe that nematodes are a useful tool for evaluating aquaculture impacts due to the ease of sampling and because they are organisms at the base of marine food chain. A carcinocultura reduz a demanda de estoques pesqueiros naturais e evita o dano ambiental resultante da pesca. Entretanto, tem o potencial de afetar a qualidade da água quando não manejada apropriadamente. Nesse trabalho, os impactos de uma fazenda de carcinocultura foram avaliados em um estuário amazô-nico focando nas mudanças de composição taxonô-mica, riqueza, densidade e diversidade de Nematoda. A amostragem ocorreu em agosto de 2004 (período seco) e janeiro de 2005 (período chuvoso) a montante e jusante em locais situados a diferentes distâncias do principal local de descarga de efluentes da fazenda. Trinta e oito gêneros foram encontrados, com dominância de Terschellingia na estação seca e Terschellingia, Daptonema, Ptycholaimellus e Gomphionema na estação chuvosa. As abundâncias foram similares às encontradas em outros estuários e, juntamente com a riqueza e diversidade, apresentaram um forte padrão sazonal com valores significativamente maiores na estação chuvosa. Nas estações de coleta não foram encontrados padrões claros de mudanças. O estuário de Curuçá mostrou alguns sinais de enriquecimento orgânico ainda não intensos, provavelmente devido à forte hidrodinâmica local e à idade da fazenda, que recentemente começou suas atividades. Recomenda-se que no futuro os trabalhos sobre impactos de cultivo, além dos pa...

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“…Eutrophication may be defined as water nutrient enrichment, especially by nitrogen and/or phosphorous and organic matter, leading to an increase in algae and superior plants, so as to cause a disturbance in the structure, function and stability of organisms present in the water and the quality of the water itself (ANDERSEN et al 2006). Nutritional enrichment experiments are, therefore, fundamental for eutrophication studies, to evaluate the effect of eutrophication on the vegetal community and the consequent animal community response.…”

Section: Discussionmentioning

confidence: 99%

“…On one hand, the filamentous cyanobacteria observed in the enriched area formed dense tangles in the sediment surface which may have made sediment samplings within dense plots difficult, especially taking into account the very small corer used for the microphytobenthos samplings: a 1.13cm² (1.2x5cm) plastic syringe. On the other hand, microphytobenthos is known to present strong temporal and spatial variation in composition and biomass, forming evident patches on the sediment surface (AZOVSKY et al, 2004;JANOUSEK et al, 2007;SANDULLI;PINCKNEY, 1999). The chlorophyll-a concentration may show significant differences among areas with and without patches (SANTOS et al, 1995;JANOUSEK et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Response of estuarine meiofauna assemblage to effects of fertilizer enrichment used in the sugar cane monoculture. Pernambuco, Brazil

et al. 2009

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In situ application of inorganic fertilizer was used to simulate environmental eutrophication associated with the sugar cane monoculture. Meiofauna community structure is herein used to assess this experimental impact. Nine quadrangular areas (4m² each) were randomly defined in the midlittoral estuarine area. Three of these areas received a high dose of sugar cane fertilizer (375 g/m² Nitrogen-Phosphorus-Potassium), three areas received a low dose of the fertilizer (187.5 g/m²) and the other three areas represented the control. The fertilizer was applied every week. Environmental parameters and meiofauna were sampled using three-to-four week intervals. Six samplings were subsequently performed maintaining this interval. Meiofauna was counted and identified to major taxonomic groups. Meiofauna community structure varied throughout the experimental areas. Control areas maintained their abundance values during the study period, but within the enriched areas meiofauna abundance decreased greatly. MDS and ANOSIM analysis showed significant variation in the meiofauna community structure among experimental areas and also along the experimental period in the enriched areas.
A aplicação in situ de fertilizantes inorgânicos foi utilizada para simular a eutrofização associada ao cultivo da cana-de-açúcar. A estrutura da associação de meiofauna foi analisada com o objetivo de avaliar este impacto. O experimento de enriquecimento do sedimento foi desenvolvido em nove áreas quadrangulares de 4m² distribuídas de forma aleatória no mediolitoral da área estuarina. Três áreas foram enriquecidas com alta concentração (375 g/m²) de NPK (Nitrogênio-Fósforo-Potássio), três com baixa concentração (187,5 g/m²) e as demais tratadas como controle. Os fertilizantes foram aplicados semanalmente. Os parâmetros físico-químicos do sedimento e a meiofauna bentônica foram coletados após três a quatro semanas da aplicação dos fertilizantes. Obedecendo este intervalo foram realizadas 6 amostragens subseqüentes. As amostras foram triadas e a meiofauna contada e identificada em nível de grande grupo. As respostas da meiofauna variaram de acordo com a área: enquanto a área Controle manteve sua abundância total durante todo o experimento, as áreas tratadas apresentaram forte queda nas densidades totais. A ordenação MDS e a análise ANOSIM evidenciaram mudanças significativas na estrutura da associação de meiofauna entre as áreas e também ao longo do experimento nas áreas tratadas

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Coastal eutrophication: recent developments in definitions and implications for monitoring strategies

Cited by 153 publications

References 21 publications

Spatial and Temporal Structures of the Macrozoobenthos from the Intertidal Zone of the Kneiss Islands (Central Mediterranean Sea)

Spatial and Temporal Structures of the Macrozoobenthos from the Intertidal Zone of the Kneiss Islands (Central Mediterranean Sea)

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

Response of estuarine meiofauna assemblage to effects of fertilizer enrichment used in the sugar cane monoculture. Pernambuco, Brazil

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