Middleclass home with large Royal Poinciana tree ; The Bryant Slides Collection ; The Bryant Slides Collection, Cuba Auteur(s) : Unknown ( Photographer ) Résumé : The slides were taken on collecting trips sponsored by the William L. Bryant Foundation, where books, music and art indigenous to the regions were gathered. The are organized by geographical location. The region where this picture was taken was not mentioned. This is a middleclass home with a large Royal Poinciana Tree in the front yard. It also has a swing in the yard and is surrounded by white picket fence. The Royal Poinciana tree is grown as an ornamental tree and is common to Cuba's rural areas and is also known in Cuba as Flamboyan tree. Cuba -- Caribbean region Droits : All rights to images are held by the respective holding institution. This image is posted publicly for non-profit educational uses, excluding printed publication. For permission to reproduce images and/or for copyright information contact Special Collections & University Archives, University of Central Florida Libraries, Orlando, FL 32816 phone (407) 823-2576, email: speccoll@mail.ucf.edu CFM1972_01a Sheet 84: 6 http://ufdc.ufl.edu/CA01200452/00001 | Partager |
Courtyard of the Mona Hotel in Saint Andrews, Jamaica ; The Bryant Slides Collection ; The Bryant Slides Collection, Jamaica Auteur(s) : Unknown ( Photographer ) Résumé : The slides were taken on collecting trips sponsored by the William L. Bryant Foundation, where books, music and art indigenous to the regions were gathered. The are organized by geographical location. This appears to be a courtyard with decorative flooring of the Mona Hotel in Saint Andrews. One of the walkways is covered with bougainvillea. Ornamental grass and lotus plants are growing nearby. Slide labeled Mona Hotel. Jamaica -- Caribbean region -- Mona, Saint Andrews Droits : All rights to images are held by the respective holding institution. This image is posted publicly for non-profit educational uses, excluding printed publication. For permission to reproduce images and/or for copyright information contact Special Collections & University Archives, University of Central Florida Libraries, Orlando, FL 32816 phone (407) 823-2576, email: speccoll@mail.ucf.edu CFM1972_01a http://ufdc.ufl.edu/AA00030882/00001 | Partager |
The Natural History Of Barbados. In Ten Books Auteur(s) : Hughes, Griffith Éditeur(s) : Printed for the author ; and sold by most booksellers in Great Britain and Ireland, Printed for the author ; and sold by most booksellers in Great Britain and Ireland, ( London ) Résumé : (Statement of Responsibility) by the Reverend Mr. Griffith Hughes ... With a list of subscribers. A slip containing errata to the list of subscribers is pasted to the verso of p.vii. The final ten leaves contain 'Explanatory notes', addenda, and index. Without the final errata leaf found in the ordinary paper issue; the errata have not been corrected. Large paper issue. The plate following plate 10 is numbered 'X*'. Ornament on p.[97] differs from that in ordinary paper issue. Cf. ESTC. Head- and tail-pieces; initials. NLM copy has no errata slip; errata printed on verso of p. vii. NLM copy lacking plate 26. Responsibility:by the Reverend Mr. Griffith Hughes ... Droits : See: https://archive.org/details/mobot31753000322294 14335085 http://ufdc.ufl.edu/AA00019784/00001 | Partager |
Old Spanish cannon at Cabanas, with Havana harbor in the distance ; Manuel R. Bustamante Photograph Collection. Résumé : Written on verso: 'Old Spanish cannon at Cabannas sic, with Havana harbor in the distance. Each of the old guns bears the date of its making and is designated by a name and other inscriptions and ornamentation. Cabannas sic and Morro? are little more than 'show' places now and during the tourist season are thronged with sight-seers every pleasant day. Our view shows a party of them in the distance, listening to the Military Band playing in the shade of the great laurel trees.' Also: 'Used Sept 1926.' Probably used by the Munson Steamship Line in their publication, The Cuba Review. 1920-1930 CHC5017 Havana (Cuba) Droits : http://merrick.library.miami.edu/digitalprojects/copyright.html chc50170001840001001 1439 | Partager |
Cuba, by Ford Fairford Auteur(s) : Fairford, Ford Pratt, Claude Éditeur(s) : A. & C. Black A. & C. Black ( London ) Résumé : (Statement of Responsibility) with eight full-page illustrations in colour by Claude Pratt. Title within ornamental border. Cuba 001056943 24308887 AFE0498 | Partager |
Proclamation, Toussaint Louverture Éditeur(s) : Chez P. Roux, imprimeur de la Commission Chez P. Roux, imprimeur de la Commission ( Au Cap-Français ) Résumé : (Citation/Reference) Sabin Title from PDF caption (LLMC Digital, viewed on Sept. 26, 2011) Place of publication and name of printer from colophon at bottom of sheet. Dated at foot of column 2: Fait au Cap, le 12 fructidor, l'an cinquième [August 29, 1797]. At head of caption title: printer's ornament with title "République française"; columns separated by woodcut ornaments. Haiti Haiti France France France Haïti Haïti France France France France Haiti 754672832 ocn754672832 | Partager Voir aussi 1789 - 1804 ( fast ) Colonies -- Administration ( fast ) Political science ( fast ) History -- Revolution, 1791-1804 ( lcsh ) Politics and government -- 1791-1804 ( lcsh ) History -- Revolution, 1789-1799 ( lcsh ) Politics and government -- 1789-1799 ( lcsh ) Colonies -- Administration ( lcsh ) Révolution, 1791-1804 ( ram ) Politique et gouvernement -- 1791-1804 ( ram ) |
Composition chimique et ornementation de Cyprideis torosa (Crustacea, Ostracoda) dans le domaine paralique Auteur(s) : Bodergat, Am Rio, M Andreani, Am Éditeur(s) : Gauthier-Villars Résumé : Cyprideis torosa (Crustacea, Ostracoda), which is well known for its ability to live in a wide range of salinity and for the variability of its ornamentation, was sampled in the paralic environment. in the Camargue (France) and in the area of Santa-Pola (south-east Spain), in ambient waters whose salinity varies from 1 to 120 g/l. The collected valves. which are smooth, punctuated, reticulated or have nodes on their surface, were analyzed by means of spark-source mass spectrometry. We detected twenty-six chemical elements, and found a clear relationship between the chemical composition, the ornamentation of the valves and the environmental parameters. In the oligohaline environment, the carapaces are thick, reticulated or node-bearing ; they are enriched in Si, Al, Fe, Mn and Ba which are terrigenous elements introduced by fresh water. In an open hypersaline environment, the carapaces are reticulated or punctuated ; they are chemically characterized by P, Sr and Li, typical for concentrated seawater. Finally, in a closed hypersaline environment. the collected individuals are smooth, and their carapaces are very thin ; their content S is related to the abundant organic matter provided by the development of algal and cyanobacterial mats. Salinity and confinement, which are the main parameters characteristic of the studied ecosystems, are also the two factors that control the ornamentation of the valves. The chemical analysis and the field observations reveal that the granulometric characteristics of the microhabitats must be considered because they control the exchanges at the water-sediment interface. The anthropic influences on the chemical composition of the carapace must be emphasized: it is possible to detect industrial and domestic wastes. But the ornamentation of the carapace is not related to these pollutants - chiefly heavy metals (Pb, Ni Sn) - and depends mainly on the open or closed character of the ambient environment. The present method highlights, on the basis of the chemical composition, a relationship between ornamentation and environmental parameters. It is particularly efficient in the interpretation of the morphology of the valves in relation to the palaeoenvironment. Oceanologica Acta (0399-1784) (Gauthier-Villars), 1991 , Vol. 14 , N. 5 , P. 505-514 Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/00103/21378/18978.pdf http://archimer.ifremer.fr/doc/00103/21378/ | Partager |
Re-description of a putative Early Cretaceous "teleosaurid" from France, with implications for the survival of metriorhynchids and teleosaurids across the Jurassic-Cretaceous Boundary Auteur(s) : Young, Mark t. Brandalise de andrade, Marco Cornee, Jean-Jacques Steel, Lorna Foffa, Davide Auteurs secondaires : University of Edinburgh Universidade Federal do Rio Grande do Sul [Porto Alegre] (UFRGS) Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) Bassins ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) Natural History Museum, London University of Bristol [Bristol] Éditeur(s) : HAL CCSD Elsevier Elsevier Masson Résumé : Thalattosuchia was a diverse clade of marine crocodylomorphs known from the Early Jurassic to the Early Cretaceous. Recent studies have hypothesized that their extinction was two-phased: (1) habitat loss near/at the Jurassic-Cretaceous boundary heavily reduced their morphofunctional diversity, particularly in Europe, while (2) climate change and a shift in marine fauna during the Early Cretaceous (either at the Valanginian-Hauterivian boundary or during the early Hauterivian) finished off the already stressed clade. Unfortunately, the Cretaceous fossil record of thalattosuchians is poor, with only one putative “teleosaurid” specimen and approximately ten metriorhynchid specimens. Here we re-describe the youngest known teleosaurid from the Cretaceous (Valanginian of south-eastern France). Originally considered to be a teleosaurid (possibly Steneosaurus), we demonstrate that it belongs to Metriorhynchidae, and a newly discovered subclade, Plesiosuchina. It differs from Plesiosuchus in the pattern of tooth enamel ornamentation and the variation in dentary alveoli size. Referring this specimen to Metriorhynchidae means there are no definitive Cretaceous teleosaurid specimens. Furthermore, it suggests that both durophagous and piscivorous teleosaurids became extinct at the end of the Jurassic. Interestingly, this is the fourth metriorhynchid lineage known to cross the Jurassic-Cretaceous boundary. As such, it would appear that the two thalattosuchian families responded very differently to the lowering sea levels at the end of the Jurassic: teleosaurids possibly became extinct, while metriorhynchids were seemingly unaffected. ISSN: 0753-3969 hal-01122803 https://hal.archives-ouvertes.fr/hal-01122803 DOI : 10.1016/j.annpal.2014.01.002 | Partager |
Shelled Molluscs Auteur(s) : Berthou, Patrick Poutiers, Jean-maurice Goulletquer, Philippe Dao, Jean-claude Résumé : Shelled molluscs are comprised of bivalves and gastropods. They are settled mainly on the continental shelf as benthic and sedentary animals due to their heavy protective shell. They can stand a wide range of environmental conditions. They are found in the whole trophic chain and are particle feeders, herbivorous, carnivorous, and predators.
Exploited mollusc species are numerous. The main groups of gastropods are the whelks, conchs, abalones, tops, and turbans; and those of bivalve species are oysters, mussels, scallops, and clams. They are mainly used for food, but also for ornamental purposes, in shellcraft industries and jewelery. Consumed species are produced by fisheries and aquaculture, the latter representing 75% of the total 11.4 millions metric tons landed worldwide in 1996. Aquaculture, which mainly concerns bivalves (oysters, scallops, and mussels) relies on the simple techniques of producing juveniles, natural spat collection, and hatchery, and the fact that many species are planktivores. Fisheries and aquaculture. Encyclopedia of life support systems : Volume II ; edited by Patrick Safran Droits : Encyclopedia of Life Support Systems (EOLSS) http://archimer.ifremer.fr/doc/2001/publication-529.pdf http://archimer.ifremer.fr/doc/00000/529/ | Partager |
Santa Ana Chapel, whithin the church Jesús de Miramar, Havana ; Manuel R. Bustamante Photograph Collection. Résumé : 1960-1970 CHC5017 Havana (Cuba) Droits : http://merrick.library.miami.edu/digitalprojects/copyright.html chc50170001440001001 1553 | Partager |
Prorocentrum bimaculatum sp nov (Dinophyceae, prorocentrales), a new benthic dinoflagellate species from Kuwait (Arabian gulf) Auteur(s) : Chomerat, Nicolas Saburova, Maria Bilien, Gwenael Al-yamani, Faiza Éditeur(s) : Wiley-blackwell Résumé : A new benthic dinoflagellate species, Prorocentrum bimaculatum sp. nov., is studied from Kuwaits marine sediments, based on detailed morphological and molecular data. Cells are large, oblong oval in shape. They are 49.955.3 mu m long and 38.443.2 mu m wide. The ornamentation of this new species is peculiar, and characterized by smooth valves with large pores (0.320.50 mu m) scattered on their surface, except in two circular patches of similar to 15 mu m in diameter, devoid of ornamentation and located on both sides of the valve centers. The periflagellar area is widely triangular, located in a moderate excavation of the right valve, and comprises nine platelets. The intercalary band of P. bimaculatum is smooth. The molecular phylogenetic position of this new taxon was inferred from SSU and LSU rDNA genes. In both phylogenetic analyses, P. bimaculatum branched with high support with Prorocentrum consutum and formed a clade sister to the one including P. lima and related species such as P. arenarium, P. belizeanum, P. hoffmannianum, and P. maculosum. From the phylogenetic study, since most species related to P. bimaculatum are known for their toxic effects and production of okadaic acid, this new species can be considered as a potential toxin producer, but this has to be analyzed. Journal Of Phycology (0022-3646) (Wiley-blackwell), 2012-02 , Vol. 48 , N. 1 , P. 211-221 Droits : 2012 Phycological Society of America http://archimer.ifremer.fr/doc/00066/17756/15698.pdf DOI:10.1111/j.1529-8817.2011.01102.x http://archimer.ifremer.fr/doc/00066/17756/ | Partager Voir aussi Arabian Gulf benthic dinoflagellates Kuwait molecular phylogeny morphology nuclear DNA Prorocentrum rDNA SEM taxonomy Télécharger |
Tropical planting and gardening for South Florida and the West Indies Auteur(s) : Smiley, Nixon, 1911- Éditeur(s) : University of Miami Press University of Miami Press ( Coral Gables Fla ) Résumé : (Bibliography) Includes bibliographical references. Florida West Indies 00653908 | Partager |
Cabra reticulata sp. nov. (Dinophyceae), a new sand-dwelling dinoflagellate from the Atlantic Ocean Auteur(s) : Chomerat, Nicolas Nezan, Elisabeth Éditeur(s) : Taylor and Francis Résumé : A new sand-dwelling dinoflagellate species, Cabra reticulata sp. nov., is described from sandy habitats in the south of Brittany (northwestern France). This new species possesses the characteristics of the 'unusual' genus, Cabra Murray et Patterson. The thecal plate formula is Po Pt 3' 1a 4'' 'x' 3c ?s 5''' 1'''' (or alternatively interpreted as Po Pt 4' 0a 4'' 'x' 3c ?s 5''' 1''''). Because of the strong lateral compression, cells of C. reticulata are frequently seen laterally and have a polygonal shape, with three prominent antapical pointed flanges and a dorsal spine in the anterior part of the hypotheca. The cingulum is ascending and incomplete. The thecal surface is ornamented with strong reticulations forming polygonal areolae, which differs from C. matta Murray et Patterson, the type species of the genus. In addition to their different size and shape, a detailed study of C. reticulata by scanning electron microscopy also revealed several different plate features. Plates of the cingulum, c1 and c3, have no reticulations and are ornamented with shallow round areolae, while c2 is only faintly reticulated. Plate 1'''' is also characteristic because dorsally it forms a prominent pointed flange and ventrally bears a peculiar small area of densely arranged pores or tiny areolae. A similar finding has previously been described in Roscoffia capitata Balech. In the description of the genus, it was suggested that Cabra is closely related to species of the genus Roscoffia, and our observations strengthen this hypothesis. Prior to this study, C. reticulata was probably observed in the Virgin Islands, Caribbean Sea, but was tentatively identified as Thecadinium sp. and not fully described. Thus, C. reticulata appears to be present on both sides of the Atlantic Ocean and to occupy benthic habitats in temperate and tropical areas. European journal of phycology (0967-0262) (Taylor and Francis), 2009-08 , Vol. 44 , N. 3 , P. 415-423 Droits : 2009 Informa plc, Taylor & Francis http://archimer.ifremer.fr/doc/2009/publication-6804.pdf DOI:10.1080/09670260902883271 http://archimer.ifremer.fr/doc/00000/6804/ | Partager |
The New Robinson Crusoe, designed for youth Auteur(s) : Defoe, Daniel, c1661-1731 Ming, Alexander, c1773-1849 ( Publisher ) Éditeur(s) : A. Ming, Jr. A. Ming, Jr. ( New York ) Résumé : (Statement of Responsibility) ornamented with plates. This text is an abridged version of J.H. Campe's adaptation of Robinson Crusoe, except Crusoe is a native of New York. It was first published in 1810 by Thomas Powers under the title: The New Robinson Crusoe. Cf. Brigham, C.S. Bibliography of the American editions of Robinson Crusoe to 1830 Cover date: 1830. Remainder of imprint on t.p. and cover: And sold at his book store, 280 1-2 Grand-street. Publisher's advertisement p. <4> of cover. Not in Brigham, NUC pre-1956, or Shoemaker. Electronic reproduction. Gainesville, Fla. : University of Florida, George A. Smathers Libraries, 2007. (University of Florida Digital Collections) (Children's Literature) Mode of access: World Wide Web. System requirements: Internet connectivity; Web browser software. This item is presumed to be in the public domain. The University of Florida George A. Smathers Libraries respect the intellectual property rights of others and do not claim any copyright interest in this item. Users of this work have responsibility for determining copyright status prior to reusing, publishing or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions may require permission of the copyright holder. The Smathers Libraries would like to learn more about this item and invite individuals or organizations to contact The Department of Special and Area Studies Collections (special@uflib.ufl.edu) with any additional information they can provide. University of Florida. United States -- New York -- New York Droits : This item is presumed to be in the public domain. The University of Florida George A. Smathers Libraries respect the intellectual property rights of others and do not claim any copyright interest in this item. Users of this work have responsibility for determining copyright status prior to reusing, publishing or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions may require permission of the copyright holder. The Smathers Libraries would like to learn more about this item and invite individuals or organizations to contact The Department of Special and Area Studies Collections (special@uflib.ufl.edu) with any additional information they can provide. 27081393 | Partager |
Quantifying exposure of wild bumblebees to mixtures of agrochemicals in agricultural and urban landscapes. Auteur(s) : Botias, Cristina David, Arthur Hill, Elizabeth M. Goulson, Dave Auteurs secondaires : Estación Biológica de Doñana CSIC (SPAIN) University of Sussex Institut de recherche, santé, environnement et travail [Rennes] (Irset) ; Université d'Angers (UA) - Université des Antilles et de la Guyane (UAG) - Université de Rennes 1 (UR1) - École des Hautes Études en Santé Publique [EHESP] (EHESP) - Institut National de la Santé et de la Recherche Médicale (INSERM) - Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ) We are grateful to Defra (Research Project PS2372) for funding this work and to the five farmers for allowing us to work on their property. We are also grateful to the Sheepdrove Trust for contributing to the costs of the analytical work. Éditeur(s) : HAL CCSD Elsevier Résumé : International audience The increased use of pesticides has caused concern over the possible direct association of exposure to combinations of these compounds with bee health problems. There is growing proof that bees are regularly exposed to mixtures of agrochemicals, but most research has been focused on managed bees living in farmland, whereas little is known about exposure of wild bees, both in farmland and urban habitats. To determine exposure of wild bumblebees to pesticides in agricultural and urban environments through the season, specimens of five different species were collected from farms and ornamental urban gardens in three sampling periods. Five neonicotinoid insecticides, thirteen fungicides and a pesticide synergist were analysed in each of the specimens collected. In total, 61% of the 150 individuals tested had detectable levels of at least one of the compounds, with boscalid being the most frequently detected (35%), followed by tebuconazole (27%), spiroxamine (19%), carbendazim (11%), epoxiconazole (8%), imidacloprid (7%), metconazole (7%) and thiamethoxam (6%). Quantifiable concentrations ranged from 0.17 to 54.4 ng/g (bee body weight) for individual pesticides. From all the bees where pesticides were detected, the majority (71%) had more than one compound, with a maximum of seven pesticides detected in one specimen. Concentrations and detection frequencies were higher in bees collected from farmland compared to urban sites, and pesticide concentrations decreased through the season. Overall, our results show that wild bumblebees are exposed to multiple pesticides when foraging in agricultural and urban landscapes. Such mixtures are detected in bee tissues not just during the crop flowering period, but also later in the season. Therefore, contact with these combinations of active compounds might be more prolonged in time and widespread in the environment than previously assumed. These findings may help to direct future research and pesticide regulation strategies to promote the conservation of wild bee populations. ISSN: 0269-7491 hal-01477203 https://hal-univ-rennes1.archives-ouvertes.fr/hal-01477203 https://hal-univ-rennes1.archives-ouvertes.fr/hal-01477203/file/Quantifying%20exposure%20of%20wild%20bumblebees_accepted.pdf DOI : 10.1016/j.envpol.2017.01.001 PUBMED : 28087090 | Partager |
Le suivi de l'état des récifs coralliens de Polynésie Française et leur récente évolution Auteur(s) : Salvat, B Aubanel, A Adjeroud, M Bouisset, P Calmet, D Chancerelle, Y Cochennec, Nathalie Davies, N Éditeur(s) : Société Nationale de Protection de la Nature Résumé : Monitoring of French Polynesia coral reefs and their recent development.-French Polynesia, consisting of 118 islands in the centre of the Pacific Ocean, has more than 15 000 km(2) of reefs and lagoons managed by the local government. Tourism and pearl culture are the two main economic resources of the country. Polynesian coral reefs are extremely diverse and are among those for which we have thorough knowledge. The exploitation of local resources has been recorded for multiple decades and includes : coral materials, fishing, harvest and export of mother-of-pearl molluscs, pearl production, and ornamental fish. All over the country, many monitoring programmes have been launched to measure the health of reefs and the natural and anthropogenic perturbations that they suffer : hurricanes and seismic events, water quality, health of benthic and fish communities, pearl oyster pathology and radiobiology. These data, collected over the last few decades, allowed to define the relative importance of natural and anthropogenic degradation on reefs and lagoons, and to explain the present status of reefs at different spatial scales. Devastating hurricanes are rare (1903-1906, 1982-1983 and occasionally at other times), but they may annihilate outer slope coral communities on some islands. Bleaching events with considerable coral mortality at different geographical scales occurred mainly in 1991, 1994 and 2003. Outbreaks of Acanthaster destroyed numerous reefs (lagoons and outer slopes) from 1978-1982 and a new demographic wave began in 2006 at many Society islands. Eutrophication events only occurred occasionally and only in some lagoons. Whereas natural catastrophic events degrade the coral reef ecosystem across many islands, at the archipelago or even regional scale, anthropogenic degradation is limited to a few Society Islands, occurring rarely on atolls and not at all on those (one third) which are uninhabited. The main causes of reef degradation in some areas of Tahiti and Moorea include the embankment of fringing zones, coral mining, overfishing, absence of urban sewage treatment and the development of leisure and tourism activities. Because of its large geographical extent, one may conclude that major reef degradation in French Polynesia is caused by catastrophic natural events. On the other hand, anthropogenic degradation is more localized. Unfortunately, the synergistic effects of these causes of degradation prevent reefs from recovering. Optimum coral cover on French Polynesian outer reef slopes is between 50-60%. After a major destructive impact (hurricane, bleaching, Acanthaster) a reef is reduced to less than 10% coral cover, however if no more major disturbance events occur a reef will recover in about 12 years. Most of the 15 000 km(2) of reefs and lagoons in French Polynesia are in good health, and along with their neighbouring reefs in East and Central Pacific they are considered as the least degraded reefs worldwide and at a low risk of becoming degraded in the few next decades. However, we are more and more anxious about the future of reefs in the world particularly because present simulations predict that major impacts of climate change would include : elevation of sea surface temperatures, increase in the strength of hurricanes and acidification of seawater which will affect the formation of coral structures. La Polynésie française, 118 îles au coeur du Pacifique, possède une surface de plus de 15 000 km2 de récifs et lagons gérés par le gouvernement polynésien. Le tourisme et la perliculture représentent les deux ressources économiques majeures du Pays. Les formations récifales très diversifiées sont parmi les mieux connues. Plusieurs suivis d'exploitation des ressources sont opérationnels depuis des décennies : granulats coralliens, pêche pour l'alimentation, collecte et exportation de mollusques nacriers, production de perles, poissons d'ornement. À l'échelle du Pays de très nombreux programmes de surveillance de l'état des récifs et des perturbations qu'ils subissent, naturelles et anthropiques, ont été mis en place : perturbations cycloniques et sismiques, qualité des eaux, état de santé des peuplements benthiques et ichtyologiques, pathologie des nacres, radiobiologie. Toutes ces données recueillies au fi l des décennies ont permis d'établir l'importance relative des dégradations naturelles et anthropiques sur les récifs et lagons polynésiens et d'expliquer leur état de santé actuel en considérant différentes échelles spatiales. Les périodes cycloniques dévastatrices pour les récifs sont rares (1903-1906, 1982-1983 et épisodiquement) mais les cyclones ont parfois anéanti les communautés coralliennes de pentes externes dans certaines îles. Les blanchissements suivis de mortalités importantes à des échelles spatiales diverses, ont été surtout ceux de 1991, 1994 et 2003. Les explosions démographiques d'Acanthaster ont détruit de nombreux récifs (lagons et pentes externes) en 1978-1982 et une nouvelle pullulation s'amplifie depuis 2006 dans plusieurs îles de la Société. Les crises dystrophiques n'ont perturbé qu'épisodiquement certains lagons. [...] Revue d'Ecologie de la Terre et de la Vie (0249-7395) (Société Nationale de Protection de la Nature), 2008 , Vol. 63 , N. 1-2 , P. 145-177 Droits : 2008 Société Nationale de Protection de la Nature http://archimer.ifremer.fr/doc/2008/publication-4558.pdf http://archimer.ifremer.fr/doc/00000/4558/ | Partager |
Morphology and molecular phylogeny of prorocentrum consutum sp. nov. (dinophyceae), a new benthic dinoflagellate from south Brittany (northwestern France) Auteur(s) : Chomerat, Nicolas Sellos, Daniel Y. Zentz, Frederic Nezan, Elisabeth Éditeur(s) : Wiley / Blackwell Résumé : A new marine benthic Prorocentrum species from sandy habitats of South Brittany (northwestern France), P. consutum sp. nov., is described using LM and SEM and molecular phylogenetic analyses. Cells have a subcircular to broadly ovoid shape and are plainly flattened. They are 57-61 lm long and 52-55 lm wide. A central pyrenoid is present, and the kidney-shaped nucleus is positioned in the posterior region. In right valve view, the periflagellar area is deeply excavated, and the left valve forms a prominent apical ridge. The periflagellar area consists of nine platelets, and a small narrow collar is present around the flagellar pore. The ornamentation of this new species is very peculiar and is characterized by a ring of round areolae located at the periphery of the valves, each areola containing three or four pores. Apart from this ring of areolae, the cell surface is smooth and with scattered pores. Pores are not present in the center of the right or left valve. The intercalary band is generally narrow and faintly striated horizontally. The molecular phylogenetic position of P. consutum sp. nov. was inferred using SSU and LSU rDNA. In both analyses, this species branched with high support in the clade comprising species with a symmetric shape and appeared to be a sister group to that formed by P. lima and other tropical benthic species, such as P. arenarium, P. belizeanum, P. hoffmannianum, and P. maculosum. Journal of Phycology (0022-3646) (Wiley / Blackwell), 2010-02 , Vol. 46 , N. 1 , P. 183-194 Droits : 2010 Wiley Blackwell Publishing, Inc. Phycological Society of America http://archimer.ifremer.fr/doc/2010/publication-7449.pdf DOI:10.1111/j.1529-8817.2009.00774.x http://archimer.ifremer.fr/doc/00000/7449/ | Partager Voir aussi Taxonomy SSU rDNA SEM Prorocentrum Nuclear DNA Molecular phylogeny LSU rDNA Dinoflagellates Télécharger |