|
|
|
| Registros recuperados: 38 | |
|
|
| Chardy, Pierre; Desbruyeres, D.; Laurec, A.. |
| Two initial methods are used to define benthic annelid taxocoenoses within the Morbihan gulf. 139 samples and 83 species are included in the matrix data. Correspondence analysis is shown to be appropriate in the classification of heterogeneous systems. It isolates Mesopsio moorei sand population from winole other samples. General analysis is better appropriate within homogeneous systems, and is able to study populations with regard to production. Results are comparable with those got fromthe whole fauna. In addition, a biogeographic limit is pointed out, within amphicteis gunneri sponge spicule muds. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1976 |
URL: http://archimer.ifremer.fr/doc/1976/publication-4983.pdf |
| |
|
|
| Chardy, Pierre; Glemarec, M.; Laurec, A.. |
| The various so-called inertia methods, the aim of which is to summarize the relationships between points by a configuration of reduced dimension, may all be considered variants of a more general method. In this regard, the links existing between Principal Component Analysis, Principal Coordinates Analysis and the Analysis of Correspondences appear clearly. Three fundamental options (inherent in all inertia methods) determine the divergences among these techniques: choice of distance, choice of weights attributed to the points, choice of position of the origin. This viewpoint also shows up the relationships between the analysis of the R and Q matrices of one and the same set of data. The application of these techniques to data of the benthic bionomy of the... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1976 |
URL: http://archimer.ifremer.fr/doc/1976/publication-4999.pdf |
| |
|
|
| Chardy, Pierre; Gros, Philippe; Mercier, Herle; Monbet, Yves. |
| A steady-state energy flow model is proposed for the benthic fine sand community of the Bay of Saint-Brieuc. The main objective is to assess the relative importance of benthic processes associated with the carbon cycle in an eutrophicated bay. Available data include biomass estimates of the major trophic groups and measurements of the most critical fluxes : particulate organic carbon sedimentation, community respiration, microbial production. A balanced annual carbon budget is estimated using an inverse method, particularly appropriate in food web research where the number of unknowns is far higher than the number of independent observations. The method offers the possibility of taking dynamical constraints into account, by introducing global flow... |
| Tipo: Text |
Palavras-chave: CARBON CYCLE; BENTHIC COMMUNITY; FINE SANDS; SUBTIDAL AREA; INVERSE METHOD. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21131/18751.pdf |
| |
|
|
| Chardy, Pierre; Dauvin, Jean-claude. |
| Organic carbon flows through the Pierre Noire fine sand community (Bay of Morlaix, France) are described with a trophodynamic point model, Data collected during several annual cycles are used to calibrate the seasonal variations of each benthic compartment. Mean annual values of state variables are correctly simulated. In a first approach, the seasonal variations were simulated using 2 forcing functions: input of energy and temperature influence. In a second run, spawning and recruitment effects were introduced as regulating factors for the macrobenthic compartments. The resulting annual carbon budget synthesizes the information we have on this common type of ecosystem. Phytoplankton production represents the major food supply to the benthic system and the... |
| Tipo: Text |
|
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00191/30180/28702.pdf |
| |
|
| |
|
| |
|
|
| Chardy, Pierre. |
| Two new species of Asellota Isopoda of the mediterranean deep-sea fauna are described in this article : Pseudomesus bispinosus sp. n. collected from the western mediterranean abyssal plain, and llyarachna medorientalis sp. n. collected from the Matapan trench and the Aegean sea. The genus Pseudomesus is new for the Mediterranean. The great vertical distribution of I. medorientalis sp. n. is in accord with the eurybathic nature of mediterranean benthic deep-sea species. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5433.pdf |
| |
|
|
| Chardy, Pierre. |
| Genus Janirella Bonnier, 1885, has numerous members in the North Atlantic Ocean (J. nanseni Bonnier, 1885; J. abyssicola Richardson, 1911; J. glabra Richardson, 1911; J. spongicola Hansen, 1916; J. lobata Richardson, 1908; J. laevis Hansen, 1916; J. vemae Menzies, 1962; J. priseri Chardy, 1972) as well as in the adjoining seas (J. bonnieri Stephensen, 1915 in the Mediterranean Sea and J. carribica Menzies, 1956 in the Caribbean Sea). Two new species have been added to this list, J. bocqueti sp. n. and J. laubieri sp. n., collected during the Noratlante cruise of the R.S. "Jean Charcot". |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5118.pdf |
| |
|
|
| Chardy, Pierre; Laubier, Lucien; Reyss, Daniel; Sibuet, Myriam. |
| Le problème de l'existence d'une véritable faune abyssale en Méditerranée est depuis longtemps posé et n'est pas encore résolu. On admet généralement qu'en raison de la structure homothermique des eaux profondes méditerranéennes, la plaine abyssale est peuplée par des espèces bathyales eurybathiques sténothermes chaudes, Mais, comme le souligne PÉRÈS [1967, p. 467] l'extrême pauvreté des grandes profondeurs méditerranéennes et le nombre très limité de prélèvements faits à ce jour ne permettent guère de donner une réponse satisfaisante à cette question. [OCR NON CONTRÔLE] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/1973/publication-5023.pdf |
| |
|
| |
|
|
| Chardy, Pierre; Laubier, Lucien; Reyss, Daniel; Sibuet, Myriam. |
| During the Polymede II cruise conducted by the R.S. "Jean-Charcot" and organized by the Scientifc department of the C.O.B., two sectors of the Ionian Sea have been the focus of a biological study of the benthic populations: the abyssal plain of Messine (abyssal being used here in its topographic meaning, that is to say a central basin away from the coast), and the Matapan South trench, to the south-west of the Peloponnesus. Samples were taken using an epibenthic drag with an automatic closing system enabling the catch of pelagic animals during the haulback and the loss of benthic samples. |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/1973/publication-5132.pdf |
| |
|
|
| Chardy, Pierre. |
| The present work is an ecological study about Peracarid Crustaceans living on rocky bottom in infra and circalittoral zone. A sampling method for hard bottom is presented in the first part. A biocenotic study permits, in a second part, to describe the distribution of the populations. Affinity index values, computed by Bravais-Pearson correlation coefficient, show three faunal associations assigned to the upper-infralittoral, deep-infralittoral and circalittoral zone. The relations between species and environment are studied by mathematical approach. A multiple linear regression analysis shows the influence of light penetration and turbidity factors. A factor analysis gives two principal components, interpreted as biotic environment and density of... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1970 |
URL: http://archimer.ifremer.fr/doc/1970/publication-5032.pdf |
| |
|
| |
|
| |
|
|
| Chardy, Pierre; Derrien, Elizabeth; Jezequel, Michele; Laurec, Alain; De La Salle, Patrice. |
| The study of a first annual hydrobiological cycle on the site of Flamanville was carried out through 19 campaigns conducted between July 76 and June 77. Twelve of them are considered as "heavy" and took place on the following dates: July 8th, 76; August 6th, September 4th, October 3rd, November 3rd, December 16th, January 5th, 77; February 2nd, March 3rd, April 14th, May 10th and May 24th. Seven campaigns consist only in one sample July 23rd, 76; August 21st, September 16th, November 19th, January 19th, 77; February 17th and June 16th. However, some variables which had not been measured during these "light" missions have not been taken into account for the analysis. A first global analysis groups together the first ten campaigns (in May, the nutritive... |
| Tipo: Text |
|
| Ano: 1977 |
URL: http://archimer.ifremer.fr/doc/00355/46643/46472.pdf |
| |
|
|
| Chardy, Pierre; Romana, Axel. |
| The coast stretching from the Nez of Jobourg and the Cape of Carteret, exposed to western marine fluxes, is characterized by a succession of rocky headlands and of bays bordered by recessing sand dunes. The intertidal zone is mostly sandy whereas the infralittoral zone consists of coarse sediments and pebbles, all this in relation to strong tidal currents. These tidal currents, avatars of the 1.2 knots drift of the Channel waters towards the North Sea, are conditioned by the filling up and emptying of the Breton-Norman Gulf where currents are among the strongest worldwide. Their anti-clockwise gyration becomes alternative and violent in tight passages (Raz Blanchard) The resulting bravage explains the good homogeneity of the water masses whose seasonal... |
| Tipo: Text |
|
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1979/rapport-6399.pdf |
| |
|
| |
|
| |
|
|
| Arnal, Olivier; Bougard, M; Delatre, Jm; Dewarumez, N; Jospin, Jp; Labbe, A; Le Fevre-lehoerff, G; Menu, D; Nicoulaud, F; Pauchet, Mc; Quintin, Jean-yves; Souplet, Arnauld; Toularastel, France; Romana, Louis-alexandre; Laubier, Lucien; Chardy, Pierre. |
| Les études écologiques sur le site d'une future centrale nucléaire se divisent en plusieurs parties : - étude d'avant-projet : étude rapide permettant d'évaluer les caractéristiques écologiques générales et la richesse du site. Sur le site de Gravelines, cette étude a été effectuée de Juillet à Décembre 1973, - étude de projet : destinée à établir un bilan écologique avant la mise en service des installations cette étude porte sur deux cycles annuels, - étude de Surveillance : s'étendant sur plusieurs années; cette étude permet, d'une part, d'apprécier les variations pluriannuelles des écosystèmes d'autre part, de rechercher les effets des rejets d'eau réchauffée sur ces écosystèmes. |
| Tipo: Text |
|
| Ano: 1977 |
URL: http://archimer.ifremer.fr/doc/00006/11736/8410.pdf |
| |
|
|
| Marchand, Philippe; Romana, Louis-alexandre; Laubier, Lucien; Chardy, Pierre. |
| La présente étude écologique du site de GRAVELINES liée au projet d'implantation d'une centrale nucléaire a été confiée par Électricité de France, Région Équipement Paris au Centre National pour l'Exploitation des Océans (CNEXO). L'installation des centrales nucléaires sur le littoral, est susceptible d'entraîner des modifications au niveau des différents écosystèmes atteints par les rejets du circuit de refroidissement. Dans le but d'évaluer de telles modifications, des études écologiques ont été entreprises sur les sites des futures centrales. |
| Tipo: Text |
|
| Ano: 1976 |
URL: https://archimer.ifremer.fr/doc/00006/11732/8406.pdf |
| |
| Registros recuperados: 38 | |
|
|
|
