|
|
|
| Registros recuperados: 47 | |
|
| |
|
|
| LOPES, L. B.; PITTA, R. M.; ECKSTEIN, C.; PEDREIRA, B. C. e. |
| Entre os principais produtores de carne bovina do mundo, o Brasil se destaca pela produção pecuária baseada em pastos sem grande dependência de grãos. Além disso, a adoção de sistemas integrados vem aumentando nas fazendas brasileiras nos últimos anos, alcançando números expressivos como 11,5 milhões de hectares cobertos por algum tipo de integração, incluindo modelos silvipastoris. Considerando a importância da pecuária para a economia nacional e o potencial de sustentabilidade das estratégias de integração, este estudo teve como objetivo avaliar se a fauna composta por besouros coprófagos poderia se alterar no sistema silvipastoril em comparação com pastagens convencionais, pois esses insetos são importantes para o controle biológico de parasitas de... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Sistemas integrados; Macrofauna; Terminalia Amazônia; Pecuária; Parasitoses. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1100524 |
| |
|
|
| Projeto BiosBrasil. Autores: Agno N. S. Acioli, Alcides Moino Jr., Elaine Cristina Cardoso Fidalgo, Fatima M. S. Moreira, Hiroshi Noda, Ieda Amaral, José Oswaldo Siqueira, José Wellington de Morais, Júlio N. C. Louzada, Juvenil Cares, Ludwig H. Pfenning, Mauricio Rizzato Coelho, Maria da Glória B. F. Mesquita, Neliton Marques da Silva, Reginaldo Constatino, Ronald Zanetti, Sandra Noda, Sidney Luiz Stürmer, Sonia Senna Alfaia. |
| Tipo: Folhetos |
Palavras-chave: Macrofauna; Mesofauna; Nematoides; Fungos; Bactérias; Projeto BiosBrasil. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/576860 |
| |
|
|
| Guillon, Erwan; Menot, Lenaick; Decker, Carole; Krylova, Elena; Olu, Karine. |
| The high biodiversity found at cold seeps, despite elevated concentrations of methane and hydrogen sulfide, is attributed to multiple sources of habitat heterogeneity. In addition to geological and geochemical processes, biogenic habitats formed by large symbiont-bearing taxa, such as bivalves and siboglinid tubeworms, or by microbial mats drive the biodiversity of small-sized fauna. However, because these habitat-forming species also depend on geochemical gradients, the respective influence of abiotic and biotic factors in structuring associated macrofaunal communities is often unresolved. The giant pockmark Regab located at 3200 m depth on the Congo margin is characterized by different fluid-flow regimes, providing a mosaic of the most common biogenic... |
| Tipo: Text |
Palavras-chave: Cold-seep; Macrofauna; Diversity; Dynamics; Vesicomyid clams; Gulf of Guinea. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00361/47210/47165.pdf |
| |
|
|
| Menot, Lenaick; Galeron, Joelle; Olu, Karine; Caprais, Jean-claude; Crassous, Philippe; Khripounoff, Alexis; Sibuet, Myriam. |
| The structure and familial-level composition of macrofaunal communities were examined within and at distance from the giant pockmark Regab in the Southern Gulf of Guinea, at 3200 m depth. The two main questions addressed in this study were (i) does habitat partitioning by large symbiont-bearing taxa. influence macrofaunal assemblages and their environment? and (ii) to what extent does the chemosynthesis-based ecosystem influence the structure and the composition of nearby macrobenthic communities? Along two radials, at sites from 250 to 1000 m away from the active centre of the cold seep, the abundance and composition of the macrofauna were typical of a deep-sea community at that depth. Except for a few cores sampled in or near dead vesicomyid fields at... |
| Tipo: Text |
Palavras-chave: Cold seep; Diversity; Gulf of Guinea; Habitat heterogeneity; Macrofauna; Open slope; Siboglinid tubeworms; Vesicomyid clams. |
| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00002/11282/8099.pdf |
| |
|
|
| Decker, Carole; Morineaux, Marie; Van Gaever, Saskia; Caprais, Jean-claude; Lichtschlag, Anna; Gauthier, Olivier; Andersen, Ann C.; Olu, Karine. |
| Håkon Mosby mud volcano (HMMV) is one of the most active and most studied seep sites in European waters. Many authors have described its thermal activity, dynamic of mud flows, and geochemical and microbial processes. It is characterised by a concentric zonation of successive biogenic habitats related to an activity and geochemical gradient from its centre to its periphery. Around the central area covered by mud flows, white and grey microbial mats occur among areas of bare sediment, whereas siboglinid tubeworm fields of Sclerolinum contortum and/or Oligobrachia haakonmosbiensis colonise the peripheral areas. The meiofaunal community is known to be structured among habitats, but the macrofauna has rarely been investigated and has never been sampled in... |
| Tipo: Text |
Palavras-chave: Cold-seep; Community structure; Macrofauna; Norwegian margin; Polychaeta. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00074/18517/16130.pdf |
| |
|
|
| Poirier, Clement; Sauriau, Pierre-guy; Chaumillon, Eric; Allard, Jonathan. |
| During the Late Holocene, the rate of sea level rise decreased and climate changes, hydrodynamic processes or anthropogenic impacts became predominant parameters governing the sedimentary infill of estuarine environments. The aim of this study is to describe the response of past benthic mollusc communities to these forcing factors. Mollusc skeletal remains were sampled from three 8000, 5500 and 2600 year-long sedimentary records in the Marennes-Oleron Bay (Atlantic Coast, France), where environmental changes have previously been identified thanks to a combination of very high resolution seismic profiles and sedimentological data. Molluscan assemblages successfully record environmental changes, even at the smallest temporal scale. They provide relevant... |
| Tipo: Text |
Palavras-chave: Atlantic Coast; Sediment core; Palaeoenvironment; Death assemblage; Macrofauna. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6833.pdf |
| |
|
|
| Bouchet, Vincent; Sauriau, Pierre-guy; Debenay, J.p.; Mermillod-blondin, F; Schmidt, S; Amiard, J.c.; Dupas, B. |
| We investigated the influence of bioturbation by macrofauna on the vertical distribution of living (stained) benthic foraminifera in marine intertidal sediments. We investigated the links between macrofaunal bioturbation and foraminiferal distribution, by sampling from stations situated on a gradient of perturbation by oyster-farming, which has a major effect on benthic faunal assemblages. Sediment cores were collected on the French Atlantic coast, from three intertidal stations: an oyster farm, an area without oysters but affected by oyster biodeposits, and a control station. Axial tomodensitometry (CT-scan) was used for three-dimensional visualization and two-dimensional analysis of the cores. Biogenic structure volumes were quantified and compared... |
| Tipo: Text |
Palavras-chave: Macrofauna; Living foraminifera; Interspecific interaction; CT scan; Bioturbating modes; Biogenic structures. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6146.pdf |
| |
|
| |
|
|
| Washburn, Travis W.; Menot, Lenaick; Bonifácio, Paulo; Pape, Ellen; Błażewicz, Magdalena; Bribiesca-contreras, Guadalupe; Dahlgren, Thomas G.; Fukushima, Tomohiko; Glover, Adrian G.; Ju, Se Jong; Kaiser, Stefanie; Yu, Ok Hwan; Smith, Craig R.. |
| Macrofauna are an abundant and diverse component of abyssal benthic communities and are likely to be heavily impacted by polymetallic nodule mining in the Clarion-Clipperton Zone (CCZ). In 2012, the International Seabed Authority (ISA) used available benthic biodiversity data and environmental proxies to establish nine no-mining areas, called Areas of Particular Environmental Interest (APEIs) in the CCZ. The APEIs were intended as a representative system of protected areas to safeguard biodiversity and ecosystem function across the region from mining impacts. Since 2012, a number of research programs have collected additional ecological baseline data from the CCZ. We assemble and analyze macrofaunal biodiversity data sets from eight studies, focusing on... |
| Tipo: Text |
Palavras-chave: Macrofauna; Deep-sea mining; Biodiversity; Polychaeta; Manganese nodules; POC flux; Species ranges; Areas of particular environmental interest. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00687/79937/82834.pdf |
| |
|
|
| De Smet, Bart; Pape, Ellen; Riehl, Torben; Bonifacio, Paulo; Colson, Liesbet; Vanreusel, Ann. |
| Deep-sea areas characterized by the presence of polymetallic nodules are getting increased attention due to their potential commercial and strategic interest for metals such as nickel, copper and cobalt. The polymetallic nodules occur in areas beyond national jurisdiction, regulated by the International Seabed Authority (ISA). Under exploration contracts, contractors have the obligation to determine the environmental baseline in the exploration areas. Despite a large number of scientific cruises to the central east Pacific Ocean, few published data on the macrofaunal biodiversity and community structure are available for the abyssal fields of the Clarion-Clipperton Fracture Zone (CCFZ). This study focused on the macrofaunal abundance, diversity and... |
| Tipo: Text |
Palavras-chave: Polymetallic nodules; Macrofauna; Deep sea; CCFZ; Biodiversity; Community structure; Deep-sea mining. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00378/48885/49311.pdf |
| |
|
|
| Masse, Hl. |
| The carbonates associated with the macrofauna of shallow fine sands have been evaluated at six stations located at five different sites on the French Mediterranean coast. The carbonate content of forty species or zoological groups has been estimated. At each station the mean calcimass has been calculated during a year-long cycle, showing the participation of the different zoological groups, mainly molluscs and echinoderms. The comparison of calcimass and associated biomass shows that CaCO3/AFDW ratio fluctuates between 1.6 to 19.3. These values are similar to those obtained in some rocky bottom communities. Calcimass values usually largely exceed biomass ones; therefore the carbon linked to carbonates cannot be excluded from the carbon balance including... |
| Tipo: Text |
Palavras-chave: Carbonates; Macrofaune; Sables fins littoraux tempérés; Carbonates; Macrofauna; Temperate shallow fine sands. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43604/43923.pdf |
| |
|
|
| Galeron, Joelle; Sibuet, Myriam; Mahaut, Ml; Dinet, A. |
| Three major size classes of the benthic metazoan communities (megafauna, macrofauna and meiofauna) were investigated simultaneously at 3 sites in the tropical Northeast Atlantic. The sites varied in their level of surface primary productivity (eutrophic, mesotrophic and oligotrophic). Results for 3 cruises in 3 seasons (Eumeli 2, winter 1991; Eumeli 3, autumn 1991; Eumeli 4, spring 1992) are given for each size class in terms of taxonomic composition, density and biomass. The benthic communities did not exhibit evidence of seasonal variation, but there were substantial differences in the quantitative structure of the metazoan communities between the 3 sites. Total metazoan density and biomass, as well as density and biomass of each size class, decreased... |
| Tipo: Text |
Palavras-chave: Deep sea; Tropical Atlantic; Meiofauna; Macrofauna; Megafauna; Taxonomic composition; Density; Biomass; Environmental conditions. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00000/10519/7602.pdf |
| |
|
|
| Quillien, Nolwenn; Nordstrom, Marie C.; Gauthier, Olivier; Bonsdorff, Erik; Paulet, Yves-marie; Grall, Jacques. |
| Sandy beaches, forming the most widespread coastal habitat in the world, are threatened by the effects of increasing anthropogenic pressure in the context of global change, including the increased occurrence of green tides composed of free-living Ulva spp. Sandy beaches are also highly dynamic ecosystems that support numerous essential ecological functions and contain a distinctive biodiversity, but their precise functioning and natural variability (i.e. the disentangling of biological and physical influences) remain under-studied. Our study aimed at determining the effects of space, time, and environmental variables on the natural variability of macrofaunal community structure and at specifically determining the effects of macroalgal accumulations on the... |
| Tipo: Text |
Palavras-chave: Macrotidal sandy beach; Macrofauna; Green tides; Space-time analysis; Beta-diversity. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00260/37078/73131.pdf |
| |
|
|
| Sarrazin, Jozee; Portail, Marie; Legrand, E.; Cathalot, Cecile; Laes, Agathe; Lahaye, Noe; Sarradin, Pierre-marie; Husson, Berengere. |
| The factors influencing the structure of hydrothermal communities are not necessarily similar across geographical regions and vent fields. In the present study, we explore the role of environmental conditions on vent community structure at local and regional spatial scales, focusing on the assemblages dominated by the engineer species Bathymodiolus azoricus. Their presence in several vent fields on the northern Mid-Atlantic Ridge (MAR) represents a unique opportunity to compare their associated fauna and to better understand large-scale biodiversity patterns. Two types of factors were considered: exogenous ones such as the presence of biogeographical barriers, depth, and distance between sites, and those linked to the intrinsic characteristics of each... |
| Tipo: Text |
Palavras-chave: Intra-field variability; Inter-field variability; Hydrothermal fauna; Abiotic factors; Diversity measures; Macrofauna; Meiofauna; Environmental drivers; Community structure; Habitats. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00615/72661/71671.pdf |
| |
|
|
| Reiss, Henning; Birchenough, Silvana; Borja, Angel; Buhl-mortensen, Lene; Craeymeersch, Johan; Dannheim, Jennifer; Darr, Alexander; Galparsoro, Ibon; Gogina, Mayya; Neumann, Hermann; Populus, Jacques; Rengstorf, Anna M.; Valle, Mireia; Van Hoey, Gert; Zettler, Michael L.; Degraer, Steven. |
| Marine benthic ecosystems are difficult to monitor and assess, which is in contrast to modern ecosystem-based management requiring detailed information at all important ecological and anthropogenic impact levels. Ecosystem management needs to ensure a sustainable exploitation of marine resources as well as the protection of sensitive habitats, taking account of potential multiple-use conflicts and impacts over large spatial scales. The urgent need for large-scale spatial data on benthic species and communities resulted in an increasing application of distribution modelling (DM). The use of DM techniques enables to employ full spatial coverage data of environmental variables to predict benthic spatial distribution patterns. Especially, statistical DMs have... |
| Tipo: Text |
Palavras-chave: Ecosystem approach; Environmental monitoring; Habitat suitability modelling; Macrofauna; Mapping; Marine spatial planning (MSP); Predictive modelling; Species distribution modelling. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00203/31405/29915.pdf |
| |
|
|
| Bergstad, Oa; Godo, Or. |
| The Mid-Atlantic Ridge is the target of an emerging international ecosystem study under the Census of marine life programme. This pilot project shall gather new knowledge on biodiversity, distribution patterns, and ecological processes, and the overriding aim is "to describe and understand the patterns of distribution, abundance and trophic relationships of the organisms inhabiting the mid-oceanic North Atlantic, and identify and model ecological processes that cause variability in these patterns". The project will focus on pelagic, benthopelagic and epibenthic macrofauna, and analyse distribution and abundance patterns in relation to the abiotic and biotic environment, as well as trophic relationships and life history strategies. Fish, crustaceans,... |
| Tipo: Text |
Palavras-chave: Médio-atlantique; Ride; Macrofaune; Biodiversité; Mid-atlantic; Ridge; Macrofauna; Biodiversity. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00322/43305/43041.pdf |
| |
|
| |
|
|
| Saulnier, E.; Le Bris, H.; Tableau, Adrien; Dauvin, J.c.; Brind'Amour, Anik. |
| Despite their importance for species conservation and sound management of exploited living resources, the density-dependent mechanisms that regulate wild populations are among the least understood process in ecology. In many marine fish species, there is strong evidence that regulation occurs at the juvenile stage, when individuals concentrate in spatially restricted nurseries. However, little is known about the underlying mechanisms. Whether competition for food resources determines fish growth and survival is particularly controversial. We investigated whether food supply may have limited juvenile fish production (integrating both growth and survival) in a coastal and estuarine nursery in western Europe. Using a recent bioenergetics-based approach, we... |
| Tipo: Text |
Palavras-chave: Food limitation; Nursery; Juvenile fish; Predatory invertebrates; Macrofauna; English channel. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00611/72282/71080.pdf |
| |
|
|
| Menot, Lenaick; Crassous, Philippe; Desbruyeres, Daniel; Galeron, Joelle; Khripounoff, Alexis; Sibuet, M.. |
| In the framework of the deep-sea environmental programme BIOZAIRE (Ifremer-Total), colonization trays were deployed for 283-433 days at three sites along the equatorial West African margin: ZA at 1300-m depth, ZC at 4000-m depth far from the Congo canyon and ZD at 4000-m depth close to the Congo canyon. The experiments aimed at determining the influence of depth and local environmental settings on macrofaunal colonization patterns and organic carbon degradation rates. The trays were filled with glass beads and this artificial substrate was enriched with ground particulate organic matter in a gradient of 0%, 0.34%, 1.02% and 3.43% organic carbon. The highest rates of organic carbon degradation ranged, according to the duration of the experiments, from 1.59... |
| Tipo: Text |
Palavras-chave: Diversity; Organic enrichment; Macrofauna; Deep sea; Colonization; Biozaire. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7323.pdf |
| |
| Registros recuperados: 47 | |
|
|
|
