Meiobenthos of the deep northeast Atlantic

Advances in Marine Biology 01/1994; 30:1-88.
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    ABSTRACT: Huvadhoo Atoll is a little-known and generally uncontaminated atoll of the southern Maldives, although the human pressure is increasing. This study represents the first attempt to characterize the meiofaunal and nematode assemblages of its lagoon both from a taxonomic and functional point of view. The nematode assemblage was made up of a total of 131 genera in 33 families. Desmodoridae, Chromadoridae and Xyalidae represented the richest and most abundant families, followed in terms of abundance by Selachinematidae and Comesomatidae. The nematode richness was overall higher than that reported in the previous studies carried out in the Central part of the archipelago. The diversity patterns revealed higher values than those reported for the back-reefs platforms, so confirming the positive influence of the water depth on the biodiversity of the nematode assemblage. The statistical analysis highlighted a significant taxonomic difference of the assemblages between the stations characterized by fine and medium-coarse sands, respectively, in line with the auto-ecological preferences of the taxa detected. The use of some nematode descriptors for assessing the ecological quality status (EQS) of the lagoon has revealed a slight disturbance in the station close to Viligili, one of the most urbanized islands. However, the summarization of all the descriptors used allows the highlighting of the good EQS of the Huvadhoo lagoon. Thus, the results of this study may be taken as the starting point for the future monitoring of the potential and real impact of the anthropogenic activity on the area over time.
    Journal of the Marine Biological Association of the UK 05/2014; DOI:10.1017/S002531541400068X · 1.13 Impact Factor
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    ABSTRACT: During DIVA-3, the third expedition of the DIVA project (Latitudinal gradients of deep-sea biodiversity in the Atlantic Ocean), 45 specimens of Serolidae were obtained from the Argentine Basin, at a depth of about 4600 m. These were a new species of Glabroserolis and Atlantoserolis vemae (Menzies, 1962). Besides the description of Glabroserolis occidentalis sp. nov., Glabroserolis specialis Menzies, 1962 is redescribed on the basis of the type material. Atlantoserolis vemae is redescribed using the type material, North Atlantic specimens, and the new South Atlantic material. Morphological differences between specimens of A. vemae from the North and South Atlantic could not be identified. The molecular data suggest that A. vemae from the Argentine Basin comprises two deeply divergent clades, which may represent reproductively isolated, sympatric species.
    Zoological Journal of the Linnean Society 10/2014; 172(2). DOI:10.1111/zoj.12178 · 2.66 Impact Factor
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    ABSTRACT: Polluted rivers and waste water flowing into the coastal zone are the main sources of pollutants entering the sea. Estuaries and marine bays with rivers flowing into them are subjected to great anthropogenic influence. Concurrently these areas are defined by significant variation of primary abiotic factors, largely of temperature and salinity. Such situations require careful study of the biota’s response to pollution, depending on the fluctuation of natural physicochemical parameters of the environment. In this case, it is possible to find reliable information on possible physiological alterations in organisms as the result of combined effects of natural and anthropogenic factors. The ecological condition of rivers entering Amursky and Ussuriysky bays of the Sea of Japan using macroinvertebrates as biological indicators was estimated. Bioassessment of the marine waters was based on sea urchin embryo biotest (Kobayashi, 1974, 1981, 1990) of both sea water and bottom sediments from different areas of Peter Great Bay of the Sea of Japan.