Muddy-bottom meiofauna responses to metal concentrations and organic enrichment in New Caledonia South-West Lagoon

Dalto, Adriana Galindo; Grémare, Antoine; Dinet, Alain; Fichet, Denis

doi:10.1016/j.ecss.2006.01.002

Cited by 31 publications

(20 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although nutrient concentrations were not measured during this operation, such an increase could not be envisaged without an important enrichment of waters, resulting from an increase in river discharges and from resuspension of bottom sediment. The %phae a being higher in sediments (50-900%: [24]) than in the water column, it could serve to visualize an effect of resuspension. However, the time lag between the cyclone and sampling was probably too high to observe increase in %phae a.…”

Section: Climatic Events Andmentioning

confidence: 99%

See 1 more Smart Citation

Chlorophylls and Phycoerythrins as Markers of Environmental Forcings Including Cyclone Erica Effect (March 2003) on Phytoplankton in the Southwest Lagoon of New Caledonia and Oceanic Adjacent Area

Neveux

Tenório

Jacquet

et al. 2009

International Journal of Oceanography

View full text Add to dashboard Cite

Recommended by Robert FrouinSpatio-temporal variations of chlorophylls and phycoerythrins, inferred by spectrofluorometric methods, were studied from April 2002 to June 2003 in the southwest lagoon and oceanic waters of New Caledonia. Trade winds blew 75% of the time and appeared as the main factor influencing surface Tchla (sum of monovinyl-and divinyl-chlorophyll a) variations in the ocean, near the barrier reef. Lagoon and oceanic waters differed in the composition of picoplanktonic cyanobacteria with a relative dominance of Prochlorococcus and high-phycourobilin Synechococcus in the ocean, and a relative dominance of high-phycoerythrobilin Synechococcus in the lagoon. Main pigment variations in the lagoon were associated with cyclone Erica in March 2003 and showed a 5-6 fold Tchla increase around Nouméa. The cyclone stimulated mainly diatom growth as indicated by the high chlorophyll (c 1 + c 2 )/chlorophyll a ratio and by the lowest values for the other pigment ratios. The relative importance of divinyl-chlorophyll a concentration and fluorescence excitation spectra of phycoerythrins appeared as useful tools for characterizing lagoon-ocean exchanges.

show abstract

Section: Climatic Events Andmentioning

confidence: 99%

“…Mining activities (nickel, chrome) also facilitate land erosion during runoff. The anthropogenic influence is also important in the SWL and is related to waste water and industrial effluents originating from the capital of New Caledonia, Nouméa [24], and its suburbs (nearly 160 000 inhabitants).…”

Section: Study Sitementioning

confidence: 99%

Chlorophylls and Phycoerythrins as Markers of Environmental Forcings Including Cyclone Erica Effect (March 2003) on Phytoplankton in the Southwest Lagoon of New Caledonia and Oceanic Adjacent Area

Neveux

Tenório

Jacquet

et al. 2009

International Journal of Oceanography

View full text Add to dashboard Cite

show abstract

“…An increase in meiofauna abundance has already been qualitatively related to organic input (SCHRATZBERGER et al, 2000;DALTO et al, 2006) and to sediment redox potential (LAMPADARIOU et al, 2005). Widbom and Elmgren (1988) observed that only some meiofauna groups presented a positive response to an increase in organic input.…”

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

View full text Add to dashboard Cite

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

show abstract

“…Consequently, we can expect relatively high level of lead in the sediments nearby these locations, especially along the transect from D01 ( Figure 1, New Caledonia sampling sites). According to the results of Dalto [36] this transect was the most affected by lead and a level around 52 mg g À1 of lead was found in the sediments nearby the D01 site. SLN (D01) had the highest level of Ni (320.2 mg g À1 ) and Cd (2.85 mg g À1 ) followed by residence (N04).…”

Section: Evolution Of Metal Content In the Solid Phasementioning

confidence: 99%

Use of fluorescence spectroscopy and voltammetry for the analysis of metal-organic matter interactions in the New Caledonia lagoon

Merdy

Bonnefoy

Martias

et al. 2012

International Journal of Environmental Analytical Chemistry

View full text Add to dashboard Cite

Muddy-bottom meiofauna responses to metal concentrations and organic enrichment in New Caledonia South-West Lagoon

Cited by 31 publications

References 42 publications

Chlorophylls and Phycoerythrins as Markers of Environmental Forcings Including Cyclone Erica Effect (March 2003) on Phytoplankton in the Southwest Lagoon of New Caledonia and Oceanic Adjacent Area

Chlorophylls and Phycoerythrins as Markers of Environmental Forcings Including Cyclone Erica Effect (March 2003) on Phytoplankton in the Southwest Lagoon of New Caledonia and Oceanic Adjacent Area

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

Use of fluorescence spectroscopy and voltammetry for the analysis of metal-organic matter interactions in the New Caledonia lagoon

Contact Info

Product

Resources

About