Consulta: subjectFacets:"Anthropogenic impacts"
Registros recuperados: 11
Data/hora: 01/06/2024 04:26:43

Is the meiofauna a good indicator for climate change and anthropogenic impacts?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zeppilli, Daniela; Sarrazin, Jozee; Leduc, Daniel; Arbizu, Pedro Martinez; Fontaneto, Diego; Fontanier, Christophe; Gooday, Andrew J.; Kristensen, Reinhardt Mobjerg; Ivanenko, Viatcheslav N.; Sorensen, Martin V.; Vanreusel, Ann; Thebault, Julien; Mea, Marianna; Allio, Noemie; Andro, Thomas; Arvigo, Alexandre; Castrec, Justine; Danielo, Morgan; Foulon, Valentin; Fumeron, Raphaelle; Hermabessiere, Ludovic; Hulot, Vivien; James, Tristan; Langonne-augen, Roxanne; Le Bot, Tangi; Long, Marc; Mahabror, Dendy; Morel, Quentin; Pantalos, Michael; Pouplard, Etienne; Raimondeau, Laura; Rio-cabello, Antoine; Seite, Sarah; Traisnel, Gwendoline; Urvoy, Kevin; Van Der Stegen, Thomas; Weyand, Mariam; Fernandes, David.
Our planet is changing, and one of the most pressing challenges facing the scientific community revolves around understanding how ecological communities respond to global changes. From coastal to deep-sea ecosystems, ecologists are exploring new areas of research to find model organisms that help predict the future of life on our planet. Among the different categories of organisms, meiofauna offer several advantages for the study of marine benthic ecosystems. This paper reviews the advances in the study of meiofauna with regard to climate change and anthropogenic impacts. Four taxonomic groups are valuable for predicting global changes: foraminifers (especially calcareous forms), nematodes, copepods and ostracods. Environmental variables are fundamental in...
Tipo: Text
Palavras-chave: Meiofauna; Climate change; Anthropogenic impacts; Biomonitoring; Natural observations and experimental studies.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00278/38938/37521.pdf

The intra-annual variability of soft-bottom macrobenthos abundance patterns in the North Channel of the Seine estuary
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Desroy, Nicolas; Janson, Anne-laure; Denis, Lionel; Charrier, Gregory; Lesourd, Sandric; Dauvin, Jean-claude.
Temporal and spatial variability of the Abra alba–Pectinaria koreni and Macoma balthica communities was examined in the northern part of the Seine estuary (North Channel) over different space and time scales in order to assess the role that the hydrologic regime and/or anthropogenic influences play in defining benthic communities over time. Sediment in the North Channel displayed strong spatial and temporal variability, sustained by intense sediment transport episodes. Total macrobenthic abundances ranged widely on the course of the year and there was no evidence of a seasonal signal for the density fluctuations, whatever the spatial scale considered. The bio-sedimentary dynamics can be divided into two periods: the first corresponds to the high flow rate...
Tipo: Text
Palavras-chave: Port 2000; Anthropogenic impacts; Abra alba community; Sediment; Bentho pelagic coupling; Temporal variability.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2613.pdf

Social Structure, Habitat Use and Injuries of Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) Reveal Isolated, Coastal, and Threatened Communities in the South Pacific
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bonneville, Claire Daisy; Derville, Solène; Luksenburg, Jolanda A.; Oremus, Marc; Garrigue, Claire.
Understanding population structure and habitat use of poorly known cetacean species is a first step toward scientifically informed management decisions. In the southern range of New Caledonia (South Pacific), a long-term dataset of Indo-Pacific bottlenose dolphins (Tursiops aduncus) encounters primarily during winter seasons 1997 to 2019 (473 group observations) was used to assess social structure, habitat use and potential threats. A total of 338 individuals were photographically identified, forming three distinct communities in the south-west lagoon, the south lagoon and the Isle of Pines. Mark-recapture histories revealed that the three communities were weakly connected and might be considered as independent management units. Suitable habitats were...
Tipo: Text
Palavras-chave: Odontocetes; New Caledonia; Social communities; Habitat; Anthropogenic impacts; Scars.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00682/79407/81953.pdf

Ecological Role of Submarine Canyons and Need for Canyon Conservation: A Review
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Fernandez-arcaya, Ulla; Ramirez-llodra, Eva; Aguzzi, Jacopo; Allcock, A. Louise; Davies, Jaime S.; Dissanayake, Awantha; Harris, Peter; Howell, Kerry; Huvenne, Veerle A.i.; Macmillan-lawler, Miles; Martín, Jacobo; Menot, Lenaick; Nizinski, Martha; Puig, Pere; Rowden, Ashley A.; Sanchez, Florence; Van Den Beld, Inge.
Submarine canyons are major geomorphic features of continental margins around the world. Several recent multidisciplinary projects focused on the study of canyons have considerably increased our understanding of their ecological role, the goods, and services they provide to human populations, and the impacts that human activities have on their overall ecological condition. Pressures from human activities include fishing, dumping of land-based mine tailings, and oil and gas extraction. Moreover, hydrodynamic processes of canyons enhance the down-canyon transport of litter. The effects of climate change may modify the intensity of currents. This potential hydrographic change is predicted to impact the structure and functioning of canyon communities as well...
Tipo: Text
Palavras-chave: Submarine canyons; Ecosystem service; Anthropogenic impacts; Conservation; Management.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00369/48059/48147.pdf

Flux estimation, temporal trends and source determination of trace metal contamination in a major tributary of the Seine estuary, France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gardes, Thomas; Debret, Maxime; Copard, Yoann; Coynel, Alexandra; Deloffre, Julien; Fournier, Matthieu; Revillon, Sidonie; Nizou, Jean; Develle, Anne-lise; Sabatier, Pierre; Marcotte, Stéphane; Patault, Edouard; Faivre, Quentin; Portet-koltalo, Florence.
Anthropogenic impacts on rivers have increased significantly over the past ~150 years, particularly at the beginning of the industrial revolution. Among other signs, this impact is manifested through the addition of trace metals and metalloid elements to rivers. The Eure River watershed in France covers an area of 6017 km2 and is a major tributary of the Seine estuary. It is not exempt from anthropogenic pressures and has been exposed to significant metal discharges over the last 80 years. The average concentrations of metals (i.e., Cr, Co, Ni, Cu, Zn, Ag, Cd, Sb, and Pb), in suspended particulate matter currently transported by the river are high compared to the local geochemical background. Moreover, the lack of correlation between concentration...
Tipo: Text
Palavras-chave: Anthropogenic impacts; Trace metals and metalloids; Eure River watershed; Temporal trends; Particulate metal flux; Pb isotopes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00618/73046/72159.pdf

Human Effects in Holocene Fire Dynamics of Central Western Patagonia (~ to 44° S, Chile)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mendez, Cesar; De Porras, Maria E.; Maldonado, Antonio; Reyes, Omar; Nuevo Delaunay, Amalia; Garcia, Juan-luis.
The forest-steppe ecotone of the eastern slope of the Andes in Central Western Patagonia (43 degrees 40'-49 degrees 15'S. Chile, South America) provides a unique area for assessing long and short term dynamics between humans and past environments. Central Western Patagonia was a demographically marginal zone inhabited intermittently and with low intensity by hunter-gatherers during the Holocene. This paper adopts a novel approach in order to assess the relationship between trends in the archeological, pollen, and charcoal records. The recognition of temporal and spatial scales in both archeology and paleoecology is crucial for defining roles in paleofire records. The main goal of the paper is to assess the role of climate and human beings as potential...
Tipo: Text
Palavras-chave: Human environmental dynamics; Charcoal analysis; Paleofire records; Human paleoecology; Anthropogenic impacts; Hunter-gatherer archeology; Holocene paleoclimate; Central Western Patagonia.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00497/60836/64474.pdf

Freshwater fish richness baseline from the São Francisco Interbasin Water Transfer Project in the Brazilian Semiarid
Provedor de dados: Neotropical Ichthyology
Autores: Silva,Márcio J.; Ramos,Telton P. A.; Carvalho,Fernando R.; Brito,Marcelo F. G.; Ramos,Robson T. C.; Rosa,Ricardo S.; Sánchez-Botero,Jorge I.; Novaes,José L. C.; Costa,Rodrigo S.; Lima,Sergio M. Q.
Abstract Among Neotropical freshwater ecoregions, the Mid-Northeastern Caatinga (MNCE) is a fish knowledge gap. Its temporary drainages are receptors of the São Francisco interbasin water transfer project (SFR-IWT) in the Brazilian semiarid. We provide a comprehensive baseline of fish richness of the five SFR-IWT basins. Species richness, shared, endemic, threatened and non-native species were obtained using sampling, ichthyologic collections, literature and online repositories (306 localities). In total 121, species were recorded, 111 of them native, and 16 (14.41%) listed for all basins. Higher richness of native species (78, 70.27%) was recorded in the São Francisco lower-middle stretch (SFRE), including 23 endemic, 61 (54.95%) in MNCE basins (13...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthropogenic impacts; Biological invasions; Caatinga’s fishes; Mid-Northeastern Caatinga Ecoregion; Temporary rivers.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000400203

Changes in the structure of fish assemblages in streams along an undisturbed-impacted gradient, upper Paraná River basin, Central Brazil
Provedor de dados: Neotropical Ichthyology
Autores: Dias,Alesandra Martins; Tejerina-Garro,Francisco Leonardo.
The João Leite River is located in the upper Paraná basin, Central Brazil. It drains areas covered by Cerrado vegetation interspersed with urban and agricultural areas. This study aims to asses changes of the fish assembleges structure along a undisturbed-impacted gradient in ten stream stretches using ecological descriptors, a similarity index and the abundance-biomass relationship (ABC curves). The fish were collected during the dry period using electrofishing gear in stretches of 50 m. Results show that the environmental variation observed along the undisturbed-impacted gradient considered influences on fish assemblage structure. Both richness and diversity differences between fish assemblages are partially influenced by stream stretch orthonian order...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthropogenic impacts; Conservation unit; Meia Ponte River; Altamiro de Moura Pacheco.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000300003

Geochemical and sedimentology of core sediments and the influence of human activities: Qusier, Safaga and Hurghada Harbors, Red Sea Coast, Egypt
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mohamed, A.W.
The grain size distribution and arameters, major and trace elements, carbonate, total phosphorus, organic carbon and total organic matter has been assessed for core sediments collected in the intertidal area of Qusier, Safaga and Hurghada harbors in July 2002. Mud is the dominant fraction in almost all samples of Qusier core and some samples of Safaga and Hurghada cores. The reason for the high mud content of all Qusier core samples and some samples of Safaga and Hurghada cores is due to the terrigenous flux of wadies, phosphate deposits, landfill and dredging in these areas. Metals concentrations in the core sediments vary between sites within a wide range for Cu, Zn, Pb, V, Ni and Cd. Concentration of metals in the sediments at the top of cores is the...
Tipo: Journal Contribution
Palavras-chave: Trace elements; Carbonate; Anthropogenic impacts; Remediation Environments Grain size Marine environment Marine pollution Organic matter Marine environment Organic matter Environment http://aims.fao.org/aos/agrovoc/c_4610 http://aims.fao.org/aos/agrovoc/c_5387 http://aims.fao.org/aos/agrovoc/c_2593.
Ano: 2005
URL: http://hdl.handle.net/1834/1248

Diversity of Calliphoridae and Sarcophagidae (Diptera, Oestroidea) in continuous forest and gaps at different stages of regeneration in the Urucu oilfield in western Brazilian Amazonia
Provedor de dados: Revista Brasileira de Entomologia
Autores: Sousa,José Roberto Pereira de; Esposito,Maria Cristina; Carvalho Filho,Fernando da Silva.
Diversity of Calliphoridae and Sarcophagidae (Diptera, Oestroidea) in continuous forest and gaps at different stages of regeneration in the Urucu oilfield in western Brazilian Amazonia. The diversity of Calliphoridae and Sarcophagidae in continuous forest and gaps at different stages of regeneration was studied in the Urucu river basin, in Coari, state of Amazonas, Brazil. The flies were collected at 16 sampling points, 12 in gaps at different stages of regeneration (early _ C1, mid- C2 and late successional _ C3) and four in continuous forest _ MT. The diversity of blowflies was similar in the two less regenerated habitats (C1 and C2), and lower than that in the late successional (C3) and continuous forests (MT). By contrast, the diversity of flesh flies...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthropogenic impacts; Blowflies; Community ecology; Flesh flies; Neotropical region.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000400014

Influence of artificial lights on the orientation of hatchlings of Eretmochelys imbricata in Pernambuco, Brazil
Provedor de dados: Revista Brasileira de Zoologia
Autores: Simões,Thyara Noely; Silva,Arley Candido da; Moura,Carina Carneiro de Melo.
ABSTRACT Sea turtle hatchlings, in natural abiotic conditions, emerge from their nests at night and go directly to the sea, following the moonlight’s reflection in the ocean. Increased human activities such as tourism and artificial lights on the coasts, however, have interfered with the ability of sea turtle neonates to find their correct destination, negatively affecting their survival rates. Here we endeavored to assess the influence of artificial lights on the hatchlings of the sea turtle Eretmochelys imbricata (Linnaeus, 1766) in the south coast of the state of Pernambuco, Brazil. To that end, 10 experiments were conducted with 15 hatchlings/test subjects. Five experiments took place in artificially illuminated areas and five in non-illuminated areas....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthropogenic impacts; Cheloniidae; Conservation; Hawksbill turtle; Light pollution.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100308