Benthic fauna and bioturbation on the Mediterranean continental slope: Toulon Canyon

Gérino, Magali; Stora, Georges; Poydenot, F.; Bourcier, Michel

doi:10.1016/0278-4343(94)00082-x

Cited by 21 publications

(13 citation statements)

References 33 publications

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“…The group of Polychaeta was not always the most abundant, in contrast to what has been reported in other studies [4], [32], [57]. In the WM basin, Foraminifera such as Hoeoglundina elegans, Uvigerina mediterraean, Ammolagena clavata and Truncorotalia sp .…”

Section: Discussioncontrasting

confidence: 82%

Large Spatial Scale Variability in Bathyal Macrobenthos Abundance, Biomass, α- and β-Diversity along the Mediterranean Continental Margin

et al. 2014

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The large-scale deep-sea biodiversity distribution of the benthic fauna was explored in the Mediterranean Sea, which can be seen as a miniature model of the oceans of the world. Within the framework of the BIOFUN project (“Biodiversity and Ecosystem Functioning in Contrasting Southern European Deep-sea Environments: from viruses to megafauna”), we investigated the large spatial scale variability (over >1,000 km) of the bathyal macrofauna communities that inhabit the Mediterranean basin, and their relationships with the environmental variables. The macrofauna abundance, biomass, community structure and functional diversity were analysed and the α-diversity and β-diversity were estimated across six selected slope areas at different longitudes and along three main depths. The macrobenthic standing stock and α-diversity were lower in the deep-sea sediments of the eastern Mediterranean basin, compared to the western and central basins. The macrofaunal standing stock and diversity decreased significantly from the upper bathyal to the lower bathyal slope stations. The major changes in the community composition of the higher taxa and in the trophic (functional) structure occurred at different longitudes, rather than at increasing water depth. For the β-diversity, very high dissimilarities emerged at all levels: (i) between basins; (ii) between slopes within the same basin; and (iii) between stations at different depths; this therefore demonstrates the high macrofaunal diversity of the Mediterranean basins at large spatial scales. Overall, the food sources (i.e., quantity and quality) that characterised the west, central and eastern Mediterranean basins, as well as sediment grain size, appear to influence the macrobenthic standing stock and the biodiversity along the different slope areas.

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Section: Discussioncontrasting

confidence: 82%

Large Spatial Scale Variability in Bathyal Macrobenthos Abundance, Biomass, α- and β-Diversity along the Mediterranean Continental Margin

et al. 2014

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“…The samples were processed within 3 hours of collection (Gerino et al, 1995). Methods used to determine TOC, TN and TP were the same as those for sinking particulate matter (Fabiano et al, 1995;Mudroch et al, 1997).…”

Section: Sediment and Particulate Matter Sampling And Analysismentioning

confidence: 99%

Ecological effects of co-culturing sea cucumber Apostichopus japonicus (Selenka) with scallop Chlamys farreri in earthen ponds

Ren

Dong

Qin

et al. 2012

Chin. J. Ocean. Limnol.

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Monthly changes in sedimentation and sediment properties were studied for three different culture treatments: sea cucumber monoculture (Mc), sea cucumber and scallop polyculture (Ps-c) and scallop monoculture (Ms). Results indicated that the survival rate of sea cucumber was significantly higher in Ps-c cultures than in Mc cultures. Sea cucumber yield was 69.6% higher in Ps-c culture than in Mc culture. No significant differences in body weight and scallop shell length were found between Ps-c and Ms cultures. The mean sedimentation rate of total particulate matter (TPM) was 72.2 g/(m 2 ⋅d) in Ps-c cultures, with a maximum of 119.7 g/(m 2 ⋅d), which was markedly higher than that of Mc (mean value). Sedimentation rates of organic matter (OM), total organic carbon (TOC), total nitrogen (TN) and total phosphorus (TP) in Ps-c cultures were also significantly higher than those in Mc cultures. TOC and TN contents of sediment increased rapidly in the first 5 months in Ms cultures and remained at a high level. TOC and TN contents in Mc and Ps-c cultures decreased during sea cucumber feeding seasons and increased during sea cucumber dormancy periods (summer and winter). The study demonstrates that co-culture of sea cucumber and scallop in earthen ponds is an alternative way to alleviate nutrient loads and improve water quality in coastal aquaculture systems. Moreover, it provides the additional benefit of an increased sea cucumber yield.

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“…By modifying the physical, chemical and biological sediment properties, the bioturbation activities of the organisms within soft sediments play a major role in the functioning of marine and limnic ecosystems (Aller, 1982;Posey et al, 1991;Richardson et al, 2002;Kitano et al, 2003;Webb and Eyre, 2004). The active bioturbation processes such as construction of biogenic structures, irrigation of burrows, sediment mixing and production of fecal pellets influence the distribution and the fate of organic matter at the water-sediment interface and within the sediment (e.g., Gérino et al, 1995;Lohrer et al, 2004). Recent experiments highlighted the impact of these bioturbation processes on denitrification in sediment (Gilbert et al, 2003), nutrients and oxygen fluxes (Mermillot-Blondin et al, 2005), xenobiotic fate (Zoumis et al, 2001;Fones et al, 2004) and changes in benthic invertebrate (Kearns et al, 1996) and microbe dynamics (Holmer et al, 1997;Goño-Urriza et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Effects of population density on the sediment mixing induced by the gallery-diffusor Hediste (Nereis) diversicolor O.F. Müller, 1776

Duport

Stora

Tremblay

et al. 2006

Journal of Experimental Marine Biology and Ecology

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Benthic fauna and bioturbation on the Mediterranean continental slope: Toulon Canyon

Cited by 21 publications

References 33 publications

Large Spatial Scale Variability in Bathyal Macrobenthos Abundance, Biomass, α- and β-Diversity along the Mediterranean Continental Margin

Large Spatial Scale Variability in Bathyal Macrobenthos Abundance, Biomass, α- and β-Diversity along the Mediterranean Continental Margin

Ecological effects of co-culturing sea cucumber Apostichopus japonicus (Selenka) with scallop Chlamys farreri in earthen ponds

Effects of population density on the sediment mixing induced by the gallery-diffusor Hediste (Nereis) diversicolor O.F. Müller, 1776

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