Résultats de la recherche (262 résultats)
Affinez votre recherche
Par Collection Par Auteur- GOELDNER-GIANELLA, L. (5)
- BERTRAND, F., (Editeur scientifique) (4)
- Elbée, Jean d', (Editeur scientifique) (4)
- Prouzet, Patrick, (Editeur scientifique) (4)
- BERTRAND, F. (4)
- KIM, D. (4)
- CAIRNS, D.M. (3)
- CORLAY, J.P., (Editeur scientifique) (3)
- CHRISTIANSEN, C. (3)
- LEBIGRE, J.-M. (3)
- MARSH, B. (3)
- MARSH, C. (3)
- PRICE, J. S. (3)
- WALKER, B. (3)
- ARNAUD-FASSETTA, G. (2)
- Association de Promotion du Pays bigouden, Cap Sizun, France, (Commanditaire) (2)
- BARTHOLDY, J. (2)
- COLLINS, J.N. (2)
- COSTA, S. (2)
- DAVIDSON, R. (2)
- 2001 (16)
- 1998 (13)
- 2003 (13)
- 1993 (11)
- 1997 (11)
- 1999 (11)
- 2000 (11)
- 1992 (10)
- 1994 (10)
- 2004 (10)
- 2002 (9)
- 1996 (8)
- 2007 (8)
- 2013 (8)
- 1988 (7)
- 1990 (7)
- 2005 (7)
- 1980 (6)
- 1985 (6)
- 1986 (6)
- Physical geography (27)
- Geography of America (14)
- Geography of Europe (10)
- Human geography (5)
- General points on geography (3)
- Geography of Asia (3)
- (1950-1970) ; Analyse spatio-temporelle ; Cleveland ; Croissance différentielle ; Etats-Unis ; Géographie de l'Amérique ; Mobilité résidentielle ; Ohio ; Population noire ; Population urbaine ; Quartier ; Tipping-point model ; Ville (1)
- (1975-1976) ; Disponibilité ; Eau ; Ecoulement ; England and Wales ; Estimation ; Géographie physique ; Lame d'eau annuelle ; Modèle ; Précipitation ; Relation pluie-débit ; Ressource en eau ; Royaume-Uni ; Siècle XVIII-XX ; Sécheresse (1)
- 1900-1975 ; Belgique ; Estuaire ; Géographie de l'Europe ; Littoral ; Paléogéographie ; Schorre ; Slikke ; Vlaanderen ; Végétation (1)
- Acantilado ; Francia ; Litoral ; Marisma litoral ; Marisma marítima ; Medio húmedo ; Percepción ; Playa litoral ; Puerto (1)
- Acción antrópica ; Estados Unidos ; Historia de la geografía ; Investigación geográfica ; Siglo 19 ; Siglo 20 (1)
- Accumulation fluviatile ; Accumulation littorale ; Action anthropique ; Chesapeake bay ; Erosion des sols ; Estuaire ; Etats-Unis ; Géographie de l'Amérique ; Littoral ; Maryland ; Mise en valeur agricole ; Wadden (1)
- Accumulation littorale ; Aménagement du littoral ; Atlantique ; Dune littorale ; Dynamique littorale ; Etats-Unis ; France ; Gestion de l'environnement ; Géomorphologie littorale ; Littoral ; Législation ; Marais maritime ; Niveau marin ; Pays-Bas ; Protection de la nature ; Protection du littoral ; Vendée ; Zone littorale (1)
- Accumulation rate ; Canada ; Coastal environment ; Neotectonics ; New Brunswick ; Palynology ; Salt marsh ; Sea level ; Sedimentology ; Stratigraphy (1)
- Acrocephalus palustris ; Auto-écologie ; Cycle reproducteur ; Eco-éthologie ; Ecologie ; Ecologie animale ; Géographie physique ; Nidification ; Oiseau ; Rousserolle verderolle (1)
- Acrocephalus palustris ; Belgique ; Ecologie ; Ethologie ; Géographie physique ; Liège, vallée ; Rousserolle verderolle ; Territorialité (1)
- Action anthropique ; Agriculture ; Algarve ; Endiguement ; Environnement ; Lagune ; Marais littoral ; Milieu humide ; Mise en valeur ; Portugal ; Protection de la nature ; Réserve naturelle ; Tourisme ; Zone protégée (1)
- Action anthropique ; Agriculture ; Aménagement hydraulique ; Bassin-versant ; Cycle de l'eau ; Déboisement ; Lac ; Milieu humide ; Pologne ; Réseau de drainage ; Wielkopolska (1)
- Action anthropique ; Algarve ; Algue ; Dynamique de la végétation ; Etude comparée ; Eutrophisation ; Irlande ; Kerry ; Lagune ; Littoral ; Marais littoral ; Photo-interprétation ; Photographie aérienne ; Portugal (1)
- Océanographie du Golfe de Gasgogne (Biarritz, 4-6 avril 2000) (4)
- Paysages vus du ciel et fiches-images pédagogiques. Numéro spécial (4)
- Littoral 95 (3)
- Geomorphology and geoarchaeology : cross-contribution. Geoarcheological session (2)
- Hauts niveaux marins et dynamiques géomorphologiques. Colloque, Rennes, France, 27-29 mars 2003 (2)
- La télédétection et les SIG dans le programme national de recherche sur les zones humides (PNRZH). Numéro spécial (2)
- Le Pays bigouden à la croisée des chemins. Actes du colloque (2)
- Les littoraux, espaces de vies (2)
- Littoral, frontières marines (2)
- (Agriculture et CEE) (1)
- A comparison of GPS and lidar salt marsh DEMs (1)
- A comparison of factors controlling sedimentation rates and wetland loss in fluvial-deltaic systems, Texas Gulf coast (1)
- A conceptual model of depositional, rather than erosional, tidal channel development in the rapidly prograding Skagit River Delta (Washington, USA) (1)
- A decline of ‘friends and neighbours voting’ in Ireland? Local candidate effects in the 2011 Irish ‘earthquake election' (1)
- A discussion on pingos in Mellemfjord, Disko, Central West Greenland (1)
- A fine-grained sediment budget for a small tidal area, Königshafen, Sylt, Germany (1)
- A new climate and water-balance station on the Peninsula Skallingen, South West Jutland (1)
- A postglacial coleopterous assemblage from Lockport Gulf, New York (1)
- A soil sequence in the natural and reclaimed marshes of the Guadalquivir river, Seville (Spain) (1)
- A study of morphology and texture of natural levees - Cumberland Marshes, Saskatchewan, Canada (1)
- Erosion rather than plant dieback as the mechanism of marsh loss in an estuarine marsh
- Biomass ; Coastal marsh ; Ecosystem ; Erosion ; Humid environment ; Louisiana ; United States ; Vegetation
- Coastal marsh loss in Louisiana is attributed to plane dieback caused by processes that stress vegetation, and a common landscape pattern is broken marsh that expands at the expense of suurrounding unbroken marsh. This paper describes an intensive
- study to test the hypothesis that broken marsh vegetation is more stressed than unbroken marsh vegetation at Marsh Island, and to identify factors limiting vegetation.
- Salinity of marshes along the James Bay coast, Ontario, Canada
- The salinities of tide water and sediments from the northern and the southern sectors of the coastal marshes are compared. In the north, Bay water of relatively high salinity is introduced to the marsh by tides, as is generally found in coastal
- marshes elsewhere. The tidewater in southern James Bay has low salinity and the salt in the marsh is released by molecular diffusion from relict salt deposited with the post-glacial Tyrrell sea sediments. This study demonstrates that the salt in coastal
- marshes may be introduced by different processes and from different sources.
- Salt-marsh foraminifera in Ho Bugt, western Denmark, and their use as sea-level indicators
- Denmark ; Estuary ; Foraminifera ; Holocene ; Hydrobiology ; Index ; Jylland ; North Sea ; Salinity ; Salt marsh ; Sea level
- This paper presents the data of 27 surface samples, collected from the Kjelst Enge salt marsh in Ho Bugt, Jutland, to investigate the potential use of salt-marsh foraminifera as sea-level indicators in Holocene intertidal deposits. The results
- confirm the usefulness of salt-marsh foraminifera as sea-level indicators in North Sea salt marshes.
- The response of coastal marshes to sea-level rise: survival or submergence?
- Coastal environment ; Coastal marsh ; Geochemistry ; Organic materials ; Salinity ; Sea level ; Sedimentology ; Vegetation
- The aim of this paper is to review the responses of various components of the marsh ecosystem to sea-level rise, emphasizing interactions between physical and biotic processes, and to demonstrate that consideration of either geomorphic or vegetative
- processes alone is inadequate to predict the response of coastal marshes to sea-level rise.
- Sulphate reduction as a geomorphological agent in tidal marshes (Great Marshes at Barnstable, Cape Cod, USA)
- Brackish environment ; Coastal environment ; Environmental degradation ; Hydrochemistry ; Intertidal zone ; Massachusetts ; Model ; Salinity ; Tidal marsh ; United States of America ; Vegetation ; Water temperature
- Many tidal marsh surfaces feature water-filled depressions, known as salt pans (shallow) or ponds (deeper). In the Great Marshes at Barnstable, Cape Cod, pond formation is an active process. The AA. hypothesize that degradation of organic matter
- by sulphate-reducing bacteria in these peat-rich marsh deposits is the primary cause of pan and pond formation. Computer simulation suggests that ponds with similar characteristics to those in the Barnstable marshes may develop by sulphate reduction.
- Hydrodynamics of salt marsh creek systems : implications for marsh morphological development and material exchange
- Coastal environment ; Earth surface processes ; Geomorphogenesis ; Hydrodynamics ; Norfolk ; Salt marsh ; Sediment transport ; Sedimentary ; Tide ; United Kingdom
- In this study, the processes of marsh morphological development are analysed. In north Norfolk, highly unsteady creek flows exhibit well-developed velocity and stress transients which result from the nature of tidal priom and the interaction
- Marsh loss in Nanticoke estuary, Chesapeake Bay in Thematic Issue II.
- Marsh loss in the Nanticoke estuary dates from the 1920 s. Since 1938 overall rate of loss has averaged 49.6 ha annually, with rates increasing down estuary. Most losses have occurred in submerged upland marshes| tidal freshwater marshes are stable
- . Interior ponding has been the primary mechanism of loss. Rising water levels are postulated to be the underlying force behind marsh losses in this estuary.
- Pedogenesis and diagnosis of peaty soils of marsh ecosystems
- The essence of pedogenesis on an organogenic substrate under different conditions of marsh formation appears most fully in the features of humus formation. The composition of the organic matter is used to establish indicators for diagnosing peat
- oils and establishing economic categories of marshes. - (L'Ed.). - Article traduit du russe, extrait de : Počvovedenie, 1992, n° 12, pp. 25-34.
- The Guadalquivir marshes
- Description of this marsh landscape and changes in its use from ancient times to the present. - (DWG)
- Numerical simulation of vertical marsh growth and adjustment to accelerated sea-level rise, North Norfolk, UK
- Coastal environment ; Coastal marsh ; England ; Eustatism ; Fauna ; Flood ; Flora ; Global change ; Model ; Numerical model ; Sea level ; Sedimentation ; United Kingdom
- This paper outlines the implementation and application of a refined one-dimensional model designed to simulate the vertical adjustment of marsh surfaces to various combinations of sediment supply, tidal levels and regional subsidence
- , with particular reference to the marshes of north Norfolk, on the East coast of England.
- Iron sulfidization in tidal marsh soils
- Biogeochemistry ; Geochemistry ; Humid environment ; Iron ; Micro-organism ; Mineralization ; Soil ; Soil classification ; Tidal marsh
- Iron sulfide minerals may be formed in tidal marshes following microbial reduction of sulfate to sulfide. Sulfate reduction requires certain necessary factors including sulfate reducing bacteria, organic matter, low redox potential, and sulfate
- . The role of each factor is reviewed critically in this paper and a generalized model is presented to assist interpretation of observed behaviour in marsh soils.
- The impact of sea-level rise on coastal salt marshes
- The response of coastal marshes to relative sea-level rise depends upon their ability to maintain their relative elevation through sedimentation. The marshes themselves represent a balance between contemporary depositional and erosional forces
- . Despite increased international efforts to clarify the response of sea level to future climatic change, predictions of the effect on coastal marshes still requires further understanding of local subsidence, sediment supply and vegetation factors.
- Processes governing marsh formation in a rapidly subsiding coastal environment
- An accretionary budget is developed for Barataria Basin fresh, brackish-intermediate and salt marshes located along a salinity gradient extending inland from the coast. The mineral sediment and organic carbon requirement of individual marsh units
- in response to water level increase is presented. The life span of salt marshes of the Mississippi River deltaic plain are estimated to be approximately 100 years.
- The nitrogen budget of a salt marsh ecosystem
- Salt marshes reduces oxidised nitrogenous compounds to ammonium and particulate nitrogen and export these reduced forms to coastal waters. The internal demands exceed the net imputs of nitrogen by rain, groundwater flow and fixation, suggesting very
- active uptake conversion, release and recycling of nitrogen within a marsh ecosystem. Nitrogen losses are mainly through tidal exchanges and denitrification, and these two outputs balance the gains. The chemical exchanges among uplands, marshes
- Evolution of salt-marsh cliffs in muddy and sandy systems : a qualitative comparison of british west-coast estuaries
- Salt-marsh cliffs in the muddy Severn Estuary are mostly strong and tall. They are retreating in response to the erosive attack of wave and tidal currents chiefly through toppling failures and rotational slips. In the sandy Solway Firth
- and Morecambe Bay systems, marsh cliffs are strong only in their upper parts, where a dense root-mat of marsh grasses binds the sediments. Here cantilever and toppling failures are the main response of the cliffs to tidal and wave erosion. The differences
- between the three estuarine systems in the mechanisms of marsh-cliff erosion are partly reflected in the mode of preservation of the cliffs on the restoration of the conditions leading to renewal of marsh growth.
- Environmental controls on multiscale spatial patterns of salt marsh vegetation
- Coastal environment ; Denmark ; Jylland ; Salinity ; Salt marsh ; Spatial distribution ; Tidal creek ; Topography ; Vegetation
- The AA. investigate the topography-vegetation relationship in a Danish salt marsh, focusing upon 2 scales : a macro-scale (ca. 500 m) across the marsh platform, encompasing seaward and landward areas, and a meso-scale (ca. 25 m) across tidal creeks
- . While long-term sea-level variation and grazing influenced the macro-scale pattern, short-term fluvial-geomorphic processes drove the meso-scale pattern. The results suggest that, in salt marshes, elevation plays a still more important ecological role
- Spatial heterogeneity and domain of scale on the Skallingen salt marsh, Denmark
- Biodiversity ; Biogeography ; Coastal environment ; Denmark ; Ecosystem ; Jylland ; Plant species ; Salt marsh ; Scale ; Spatial variation
- The study area is the Skallingen salt marsh in Jutland. The AA. specifically aim to identify the domain of scale over which vegetation pattern and process are detected on a salt marsh. Such identification will be achieved by 1) examining the species
- of emerging novel theory that emphasizes scale-dependent complexity in salt marsh ecosystems.
- Vertical porosity profile of a clay-rich marsh soil
- Clay mineral ; France ; Microstructure ; Poitou-Charentes ; Porosity ; Soil ; Soil properties ; Tidal marsh
- The vertical distribution of porosity throughout a clay-rich marsh soil profile was studied in a grassland field with samples taken from the soil surface characterized by water contents near their shrinkage limit down to 2.00 m deep saturated
- sediments over their liquidity limit. Samples were taken from soils of a marsh located at the experimental site of St Laurent de la Prée near Rochefort. The petrographic observations point out the role of the initial honey-comb and isotropic structure
- of the Flandrian sediment in the development of the structural profiles of marsh soils.
- Stratigraphic and microfossil evidence for late Holocene tsunamis at Swantown marsh, Whidbey Island, Washington
- Earthquake ; Holocene ; Palaeo-ecology ; Palaeo-environment ; Plate tectonics ; Quaternary ; Sedimentology ; Stratigraphy ; Tidal marsh ; Tsunami ; United States of America ; Washington State
- The AA. report stratigraphic and paleoecologic findings from a tidal marsh on the west coast of Whidbey Island, Washington, where 4 muddy sand layers were found in the peat underlying the marsh. These sand sheets record repeated inundation
- of the marsh over a short time period by distinct pulses of sediment-laden ocean water, consistent with deposition by a tsunami wave train. The layers have been radiocarbon-dated. The 2 older layers do not correlate with plate-boundary events. They may
- Trends of soil organic matter turnover in the salt marsh of the Yangtze River estuary
- China ; Estuary ; Geochemistry ; Grain size distribution ; Humid environment ; Isotope analysis ; Organic materials ; Salt marsh
- Characteristics and tidal flat trends of soil organic matter (SOM) turnover were studied for the Chrongmingdongtan Salt Marsh in the Yangtze River estuary, based on analyses C 13, grain sizes and contents of particulate organic carbon, total
- nitrogen and inorganic carbon for 3 cores excavated from high tidal flat, middle tidal flat and bare flat. The muddy tidal flat processes exerted direct influences on sequestration and turnover of SOM in the salt marsh, and had great constraints
- on the spatial and temporal characteristics of SOM turnover of the Chrongmingdongtan Salt Marsh in the Yangtze River estuary.