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| Registros recuperados: 19 | |
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| Rebzanizahaf, C; Bellan, G; Bakalem, A; Romano, Jc. |
| The impact of pollution on the macrobenthos was studied through a seasonal cycle by analysis of samples taken at 34 stations in the different basins of Algiers harbour (Mustapha, Agha and Vieux Port). Physical and chemical characteristics were measured in the water column (temperature, salinity, seston, dissolved oxygen) and sediment (pH). The faunistic composition of the stations was assessed according to the ecological significance of species or groups of species as determinants of pollution. There were close correlations between the physical and chemical characteristics at che stations and the spatial distribution of species and species assemblages. Seasonal variation in populations was most marked in Mustapha basin, less noticeable in Agha and weak in... |
| Tipo: Text |
Palavras-chave: Macrobenthos; Algiers harbour; Seasonal evolution. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20458/18130.pdf |
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| Migne, A; Davoult, D. |
| Because of strong tidal currents, the bottom of the Dover Strait consists of coarse sediment which is colonized by a pebble community. A quantitative study, based on 0.1 m(2) quadrat samples taken by divers, was conducted on this community to establish the richness of benthic macrofauna (in terms of biomass and diversity) and to provide conclusive data on global community structure (spatial and temporal heterogeneity, trophic structure). Eight samples were taken between June 1992 and June 1993, eight replicates being taken on each sampling visit. One hundred and one species were identified, in 10 zoological groups, and a mean biomass of 281 g.m(-2) (ash free dry weight) was calculated. The Shannon diversity index was low (H' = 1.24) because of the strong... |
| Tipo: Text |
Palavras-chave: Macrobenthos; Biomass; Trophic structure; Diversity; Spatial heterogeneity. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20409/18076.pdf |
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| Giberto, D.A.; Bremec, C.; Cortelezzi, A.; Rodrigues Capitulo, A.; Brazeiro, A.. |
| In this study, we analyse spatial patterns of macrobenthic communities of the Río de la Plata system, and assess the species turnover or beta diversity and its relationship with environmental gradients. Macrobenthic samples and physico-chemical parameters were collected from 20 sampling sites along a transect of 560 km, including the freshwater (FW), estuarine (ES)and marine (MA)sectors. Three main assemblages corresponding to the above mentioned sectors were defined with multivariate analysis (cluster, MDS). In total 134 taxa were recorded, 81 in MA, 33 in FW and 38 in ES, represented mainly by polychaete, mollusc and crustacean species. Depth, salinity and clay showed the strongest correlation with the observed faunal patterns (pw=0.62; BIO-ENV... |
| Tipo: Journal Contribution |
Palavras-chave: Macrobenthos; Assemblages; Brackishwater environment; Estuaries; Estuaries; Macrobenthos; Brackishwater environment; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_12312; Http://aims.fao.org/aos/agrovoc/c_1050. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1571 |
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| Sankaré, Yacouba. |
| Les variations d'abondance des espèces de la macrofaune associée au racines de Pistia stratiotes du lac d'Ayamé II et du fleuve Comoé ont été étudiées durant un an. Les plantes ont été collectées mensuellement à la main au sein d'un quadrat de 1mètre carré de recouvrement.La biomasse de Pistia stratiotes est élevée et reste constante dans le lac d'Ayamé II quelle que soit la saison. Elle est variable dans le fleuve Comoé. Le dénombrement des organismes a permis de voir que l'abondance totale est plus élevée dans le fleuve Comoé que dans le lac d'Ayamé II.Elle es maximale en grande saison des pluies puis diminue pendant la petite saison sèche, la petite saison des pluies et la grande saison sèche.Durant cette dernière période elle augmente de nouveau dans... |
| Tipo: Journal Contribution |
Palavras-chave: Macrobenthos; Rivers; Aquatic weeds. |
| Ano: 1991 |
URL: http://hdl.handle.net/1834/5526 |
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| Vergnon, Rémi; Blanchard, Fabian. |
| The necessity to move from a traditional fishery management to an ecosystem approach is now acknowledged. Indicators are required to support the development of this approach. For example, community indicators have been proposed to assess the impact of fishing. We tested here the applicability of one such community indicator, the abundance-biomass comparison (ABC method), as a measure of the impact of bottom trawling (years of sampling: 2001 and 2003) on the benthic invertebrates-typically starfishes, crabs, squat lobsters, shrimps and large hard-shelled molluscs-of "Grande Vasiere", a major French fishing zone, in the Bay of Biscay. The ABC method is generally used as an impact indicator for different types of physical, biological and anthropogenic... |
| Tipo: Text |
Palavras-chave: Atlantic Ocean; Inter annual variability; Density; Macrobenthos; ABC method; Fishing impact; Indicator; Bottom trawl survey. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2133.pdf |
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| Ghertsos, K; Luczak, C; Dewarumez, Jm; Dauvin, Jc. |
| Along the coast of France in the English Channel, muddy fine-sand communities are restricted to bays and estuaries, but in the southern North Sea they stretch out to larger areas (mesoscale continuum). We studied three regions containing these communities, each subject to different hydrological conditions and contrasting trophic structures of the water column. The Bay of Morlaix was strongly affected by the "Amoco Cadiz" oil spill of 1978 and recovered slowly. The Bay of Seine is influenced by high levels of nutrient input from the River Seine. A retention structure exists in the eastern part ensuring recruitment stability. The Gravelines area in the southern North Sea was invaded by the American jackknife clam (Ensis directus), which became a key species... |
| Tipo: Text |
Palavras-chave: Abra alba community; English Channel; Macrobenthos; North Sea; Spatial scales of observation; Temporal change. |
| Ano: 2000 |
URL: https://archimer.ifremer.fr/doc/00464/57583/59810.pdf |
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| Zenetos, A; Christianidis, S; Pancucci, Ma; Simboura, N; Tziavos, C. |
| The macrobenthic faunal composition, sedimentology and physical characteristics were investigated in an open coastal area of the Greek Ionian Sea. Hydrographic parameters were recorded at 26 stations using a CTD profiler during nine cruises performed between 1990 and 1991, while benthic samples were collected in November 1990 and April 1991 at 22 stations with the aid of a Ponar grab. Macrobenthic variety indicated an area of high scientific interest : 351 species in all, 18 of which are new to the Creek fauna. Furthermore, 10 species are previously unrecorded in the Eastern Mediterranean. Of the biological indices estimated, species richness was comparable to that of other open Greek areas, while population density seemed to be a function of a) depth and... |
| Tipo: Text |
Palavras-chave: Macrobenthos; Zoogeography; Physical oceanography; Sedimentology; Ionian Sea. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20408/18075.pdf |
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| Munari, C; Modugno, S; Ghion, F; Castaldelli, G; Fano, Ea; Rossi, R; Mistri, M. |
| The macrobenthic community structure of the Valli di Comacchio (northern Italy) was described in order to assess the ecological conditions of the main basins through 2001. In addition, the biotic data set gathered in 1997-1998 was compared to achieve an estimation of the eventual recovery of the lagoonal benthic assemblages. Four permanent sites (PI, M4, M5 and M6), located along a gradient of sediment texture and confinement, and representing four different areas of the lagoon, were sampled quarterly in 2001 for macrofauna and sedimentary variables (organic content, phytobenthic chlorophyll-a, depth of the redox potential discontinuity layer), and fortnightly for water variables (temperature, salinity, dissolved oxygen and planktonic chlorophyll-a). Water... |
| Tipo: Text |
Palavras-chave: Macrobenthos; Valli; Mer Adriatique; Restauration; Macrobenthos; Valli; Adriatic Sea; Recovery. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00322/43286/43021.pdf |
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| Soares-Gomes,Abilio; Fernandes,Flavio da Costa. |
| Bivalve mollusks of the continental shelf of Cabo Frio upwelling ecosystem were sampled monthly from February 1986 to February 1987 along a 30 to 60 m depth gradient. Mactra petiti Orbigny, 1846, and Tellina gibber Ihering, 1907 were constant species in 30 m; Nucula puelcha Orbigny, 1846, Adrana patagonica Orbigny, 1846, T. petitiana, T. gibber, and Corbula patagonica Orbigny, 1846 in 45 m; and N. puelcha, T. gibber, C. patagonica, and C. caribaea in 60 m. The number of rare species was similar along the depth gradient, ranging from six to ten species. The number of common species was higher in 60 m than in 30 m. Some species showed a continuous distribution but changed the frequency and abundance along the bathymetric gradient. The mean density was higher... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Benthic associations; Community ecology; Macrobenthos; Soft-bottom; Sublittoral. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100009 |
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| Dauvin, Jean-claude; Ruellet, Thierry; Desroy, Nicolas; Janson, Anne-laure. |
| Using recent indices developed, in part, for use under the European Water Framework Directive (AMBI, BENTIX, BOPA BQI, I2EC and the trophic index ITI), the ecological quality status of two highly contaminated environments-the Bay of Seine and the Seine estuary (Eastern English Channel)-was determined on several spatial and temporal scales. Data from 604 observations gathered over a 14-year period (1988-2002) were analyzed, and the results used to show the relationship between biotic indices, environmental variables and classic descriptors (e.g., number of species, total abundance, dominance index, ES(50) and Shannon/Brillouin diversities). Though the specific ecological quality (EcoQ) values calculated with the various indices were different, the overall... |
| Tipo: Text |
Palavras-chave: Benthic index; Biotic index; Macrobenthos; English Channel; Bay of Seine; Seine estuary. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2510.pdf |
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| Rees, Hubert; Eggleton, Jacqueline D.; Vanden Berghe, Edward; Aldridge, John; Bergman, Magda J. N.; Boalm,; Cochrane, Sabine; Craeymeersch, Johan A.; Degraer, Steven; Desroy, Nicolas; Dewarumez, Jean-marie; Duineveld, Gca; Essink, Karel; Goethals,; Hillewaert, Hans; Irion,; Kershaw, Peter; Kroncke, Ingrid; Lavayele, Marc; Mason, Claire; Nehring, Stefan; Newell, Richard; Oug, Eivind; Pohlman, Thomas; Reiss, Henning; Robertson, Mike; Rumorh, Heye; Schratzberger, Michaela; Smith,; Van Dalfsen, Jan; Van Hoey, Gert; Vincx, Magda; Willems, Wouter. |
| The ICES Study Group on the North Sea Benthos Project 2000 undertook to integrate recent (1999–2002) macrobenthic infaunal and environmental data from various national sources. The main aim was to compare the outcome with that of the ICES North Sea Benthos Survey conducted in 1986, to identify any significant changes and their likely causes. In the process, the exercise yielded valuable lessons for the conduct of international collaborative programmes, as well as insights into the utility of a range of interpretational tools. These are timely in view of increasing requirements for periodic sea-wide assessments of quality status to meet international obligations, such as those under OSPAR, ICES, HELCOM, and EU auspices for European waters. This paper... |
| Tipo: Text |
Palavras-chave: Macrobenthos; Infauna; Sediments; Communities; Ecosystems; North Sea. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00158/26893/25024.pdf |
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| Сергеева, Н. Г.; Буркацкий, О. Н.. |
| Рассмотрены особенности современной структуры макробентоса восточной зоны Азовского моря. Материалом послужили сборы донных осадков в сентябре 2000 г. на 43 станциях, охватывающих Таганрогский залив и море. В составе макробентоса обнаружены животные 53 видов, представляющих 16 крупных таксонов: В Таганрогском заливе развиты сообщества Oligochaeta, Hypanis, Neanthes, Hypaniola, Ostracoda, Cerastoderma (с доминантом C. lamarcki). В устьевой зоне залива обнаружены сообщества Balanus и Mya. В собственно море наибольшую площадь занимали сообщества Balanus, Mytilus, Hediste. В районе предпроливья размещены сообщества Cerastoderma (с доминантом C. glaucum) и Abra. Плотность поселений и биомасса макробентоса варьировали в широком диапазоне - от нулевых значений до... |
| Tipo: Journal Contribution |
Palavras-chave: Азовское море; Таганрогский залив; Макробентос; Azov Sea; Macrobenthos. |
| Ano: 2002 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/405 |
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| Monthon Kaenmanee; Sujitra Samakraman; Nipavan Bussarawit; Sakanan Plathong. |
| Species composition, distribution and community structure of intertidal rocky shore macrobenthos in Pathiew, Chumporn were investigated quantitatively in August 2007 and February 2008. A total of 49 species of macrobenthos were identified with 1 species of sponge, 1 species of platyhelminth, 11 species of annelids, 15 species of molluscs and arthropods, 3 species of echinoderms, 1 species of bryozoan, and 2 species of chordates. A gastropod, Clypeomorus b. bifasciata, was the dominant taxon occurring with the high density at the mid and lower shore level whereas the densities of other macrobenthos species tended to increase with the distance from the supralittoral shoreline. Based on the results of SIMPER Analysis, two groups of communities were... |
| Tipo: Collection |
Palavras-chave: Macrobenthos; Species composition; Distribution; Community structure; Intertidal rocky shore; Chumporn province; สัตว์หน้าดินขนาดใหญ่; ชนิด; การแพร่กระจาย; โครงสร้างชุมชน; เขตน้ำขึ้นน้ำลง; หาดหิน; จ.ชุมพร อ.ปะทิว. |
| Ano: 2010 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5227 |
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| Registros recuperados: 19 | |
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