Consulta: subjectFacets:"Sublittoral"
Registros recuperados: 7
Data/hora: 13/06/2024 02:56:19

Long-term macrofaunal studies in a subtidal habitat off Norderney (East Frisia, Germany) from 1978 to 1994 .1. The late winter samples
Provedor de dados: 5
Autores: Zeiss, B; Kroncke, I.
Macrofaunal samples were collected regularly during springtime from 1978 to 1994 in the subtidal zone off Norderney, one of the East Frisian barrier islands. Sampling was carried out from a research vessel by means of a 0.2 m(2) van-Veen grab at five sites with water depths of 10-20 m. Abundances, biomasses and species composition were analysed by cluster analysis and multidimensional scaling. The resulting patterns are discussed in terms of anthropogenic impact and varying meteorological conditions. Species survival is severely impaired by cold winters, whereas storms and hot summers have a minor impact. There is evidence that mild meteorological conditions and eutrophication have resulted in an increase in total biomass since 1989. In addition to...
Tipo: Text
Palavras-chave: Macrofaunal; Fabulina fabula; Association; Long-term changes; Sublittoral; German bight; Climate.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20401/18068.pdf

Le Scléractiniaire Dendrophyllia cornigera en eau peu profonde, à Ouessant (Bretagne, Atlantique NE) en l'absence de barrière thermique
Provedor de dados: 5
Autores: Castricfey, A.
During a diving survey at Ushant island, the Scleractinian Dendrophyllia cornigera (Lamarck) was discovered at a depth of 30 m, below the laminarian zone. This is the shallowest record at present of this species, which is better known from the rocky bottoms between 200 and 500 m. Conditions favouring this occurrence in shallow water, as well as the occurrence of the species around 60-90 m in other coastal sites (Sein, Audierne, Penmarc'h, Glenan, Belle-Ile, Vigo), are examined, with special reference to temperature. D. cornigera tolerates temperatures ranging from 8 degrees C at its northern limit in the SW of Ireland, to 14 degrees C at its southern limit, in the Cape Verde Islands. Within its entire distribution range, the species displays some...
Tipo: Text
Palavras-chave: Dendrophyllia cornigera; Sublittoral; Rocky bottom; Benthic communities; North east Atlantic.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00096/20734/18371.pdf

Aquaculture and marine protected areas: Potential opportunities and synergies
Provedor de dados: 5
Autores: Le Gouvello, Raphaela; Hochart, Laure-elise; Laffoley, Dan; Simard, Francois; Andrade, Carlos; Angel, Dror; Callier, Myriam; De Monbrison, David; Fezzardi, Davide; Haroun, Ricardo; Harris, Alasdair; Hughes, Adam; Massa, Fabio; Roque D'Orbcastel, Emmanuelle; Soto, Doris; Stead, Selina; Marino, Giovanna.
To meet the Convention on Biological Diversity's Aichi Target 11 on marine biodiversity protection and Aichi Target 6 on sustainable fisheries by 2020, as well as the Sustainable Development Goal (SDG) 2 on food security and SDG 14 on oceans by 2030, there is an urgent need to rethink how best to reconcile nature conservation and sustainable development. This paper argues for effective governance to support processes that apply principles of sustainable development and an ecosystem approach to decide about economic activities at sea such as aquaculture. It describes opportunities, benefits and synergies between aquaculture and MPAs as a basis for wider debate. The scope is not a comprehensive analysis of aquaculture and MPAs, but rather to present examples...
Tipo: Text
Palavras-chave: Aquaculture; Ecosystem approach; Environmental impact assessment; Littoral; Marine protected area; Ocean; Sublittoral.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00398/50969/51848.pdf

Sublittoral hard substrate communities of the southern Delta area, SW Netherlands
Provedor de dados: 16
Autores: Kluijver, M.J. de.
During 1985 and 1986, sublittoral communities on hard substrates in the southern Delta area, SW Netherlands, were investigated at 79 stations. The stations were distributed over 20 localities situated in the saline Lake Grevelingen, the Oosterschelde estuary and the SE North Sea. The percentage cover of all sessile organisms were estimated using quadrat sampling techniques; data were processed using cluster analysis. The stations were characterized by the assessment of the most important environmental parameters: available light, hydrodynamics and sediment characteristics. Eight sublittoral communities on hard substrates are described by characteristic and dominant species. Three communities are subdivided into variants on account of differences in...
Tipo: Article / Letter to the editor
Palavras-chave: Sublittoral; Hard substrate; Communities; Environmental parameters; Netherlands.
Ano: 1989
URL: http://www.repository.naturalis.nl/record/503862

Detection of introduced sessile species on the near shore continental shelf in southern Brazil
Provedor de dados: 103
Autores: Bumbeer,Janaína de Araújo; Rocha,Rosana Moreira da.
Invasion by marine species, often considered a grave threat to marine ecosystems, occurs throughout the world as a consequence of many anthropogenic activities. In coastal Paraná, many factors including shipping, aquaculture and the use of artificial substrates provide suitable environments for the establishment and rapid spread of introduced marine species. To better understand this process, the encrusting community was studied on polyethylene plates (n = 120, 10 x 10 cm) that were placed seasonally at fixed locations on the inner continental shelf to detect non-native species. Of the 62 taxa found, 40 were identified to species, 14 of which were native, 9 introduced and 17 cryptogenic. We found a new introduction while most introduced species were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial substrate; Biofouling; Marine bioinvasion; Sublittoral.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000200005

Spatial distribution of bivalve mollusc assemblages in the upwelling ecosystem of the continental shelf of Cabo Frio, Rio de Janeiro, Brazil
Provedor de dados: 104
Autores: 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

Population structure of the lancelet Branchiostoma caribaeum (Cephalochordata: Branchiostomidae) in the Baía de Guanabara, Rio de Janeiro, southeastern Brazil
Provedor de dados: 104
Autores: Silva,Luis F. B. da; Tavares,Marcos; Soares-Gomes,Abilio.
Population structure of the lancelet Branchiostoma caribaeum Sandevall, 1853 was studied in four surveys, corresponding to austral seasons, in a tropical bay, southeast of Brazil. Abundance was higher in the spring and was positively correlated to coarse sediments, limiting its occurrence to some sectors of the sampling area. Body length and biomass differed seasonally but not between sexes. Sexually mature individuals occurred in all seasons, suggesting continuous breeding that is typical of tropical species. Variation in the frequency of small specimens indicates temporal differences in the intensity of breeding. The body length of recruits differed from other population of lancelets and the small length which B. caribaeum attained sexual maturity in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphioxus; Autoecology; Macrobenthos; Marine invertebrates; Soft-bottoms; Sublittoral.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000400006