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| Registros recuperados: 271 | |
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| Luo, Zhaohe; Lim, Zhen Fei; Mertens, Kenneth; Gurdebeke, Pieter; Bogus, Kara; Carbonell-moore, Maria Consuelo; Vrielinck, Henk; Leaw, Chui Pin; Lim, Po Teen; Chomerat, Nicolas; Li, Xintian; Gu, Haifeng. |
| The dinoflagellate genus Bysmatrum encompasses five epibenthic or tide-pool species and has been characterized by separated anterior intercalary plates. In the present study, we obtained six strains of Bysmatrum from the South China Sea and French Atlantic coast by isolating single cells/cysts from plankton and sediment samples. All strains were examined with light microscopy and scanning electron microscopy. Based on morphological observations, three strains were identified as Bysmatrum subsalsum, characterized by the elongated and rectangular first and a hexagonal second anterior intercalary plate. They differ from each other in the number of sulcal lists and the configuration of the first anterior intercalary plate. One strain was identified as... |
| Tipo: Text |
Palavras-chave: Benthic dinoflagellate; Biogeography; Bysmatrum granulosum; Bysmatrum gregarium; Bysmatrum subsalsum; Eyespot; Molecular phylogeny. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00450/56188/57872.pdf |
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| Reynolds, Pamela L.; Stachowicz, John J.; Hovel, Kevin; Bostrom, Christoffer; Boyer, Katharyn; Cusson, Mathieu; Eklof, Johan S.; Engel, Friederike G.; Engelen, Aschwin H.; Eriksson, Britas Klemens; Fodrie, F. Joel; Griffin, John N.; Hereu, Clara M.; Hori, Masakazu; Hanley, Torrance C.; Ivanov, Mikhail; Jorgensen, Pablo; Kruschel, Claudia; Lee, Kun-seop; Mcglathery, Karen; Moksnes, Per-olav; Nakaoka, Masahiro; O'Connor, Mary I.; O'Connor, Nessa E.; Orth, Robert J.; Rossi, Francesca; Ruesink, Jennifer; Sotka, Erik E.; Thormar, Jonas; Tomas, Fiona; Unsworth, Richard K. F.; Whalen, Matthew A.; Duffy, J. Emmett. |
| Latitudinal gradients in species interactions are widely cited as potential causes or consequences of global patterns of biodiversity. However, mechanistic studies documenting changes in interactions across broad geographic ranges are limited. We surveyed predation intensity on common prey (live amphipods and gastropods) in communities of eelgrass (Zostera marina) at 48 sites across its Northern Hemisphere range, encompassing over 37 degrees of latitude and four continental coastlines. Predation on amphipods declined with latitude on all coasts but declined more strongly along western ocean margins where temperature gradients are steeper. Whereas insitu water temperature at the time of the experiments was uncorrelated with predation, mean annual... |
| Tipo: Text |
Palavras-chave: Biogeography; Latitude; Mesograzer; Predation; Seagrass; Species interactions; Temperature; Zostera. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00610/72246/71053.pdf |
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| Leroy, Emmanuelle; Royer, Jean-yves; Alling, Abigail; Maslen, Ben; Rogers, Tracey L.. |
| Blue whales were brought to the edge of extinction by commercial whaling in the twentieth century and their recovery rate in the Southern Hemisphere has been slow; they remain endangered. Blue whales, although the largest animals on Earth, are difficult to study in the Southern Hemisphere, thus their population structure, distribution and migration remain poorly known. Fortunately, blue whales produce powerful and stereotyped songs, which prove an effective clue for monitoring their different ‘acoustic populations.’ The DGD-Chagos song has been previously reported in the central Indian Ocean. A comparison of this song with the pygmy blue and Omura’s whale songs shows that the Chagos song are likely produced by a distinct previously unknown pygmy blue whale... |
| Tipo: Text |
Palavras-chave: Animal migration; Biogeography; Marine biology; Marine mammals. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00691/80280/83365.pdf |
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| Kivela, Mikko; Arnaud-haond, Sophie; Saramaki, Jari. |
| The recent application of graph-based network theory analysis to biogeography, community ecology and population genetics has created a need for user-friendly software, which would allow a wider accessibility to and adaptation of these methods. EDENetworks aims to fill this void by providing an easy-to-use interface for the whole analysis pipeline of ecological and evolutionary networks starting from matrices of species distributions, genotypes, bacterial OTUs or populations characterized genetically. The user can choose between several different ecological distance metrics, such as Bray-Curtis or Sorensen distance, or population genetic metrics such as FST or Goldstein distances, to turn the raw data into a distance/dissimilarity matrix. This matrix is... |
| Tipo: Text |
Palavras-chave: Biogeography; Biological communities; Graph theory; Microbial ecology; Network analysis; Population genetics. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00197/30853/29217.pdf |
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| Laporte, Martin; Shao, Zhaojun; Berrebi, Patrick; Laabir, Mohamed; Abadie, Eric; Faivre, Nicolas; Rieuvilleneuve, Fabien; Masseret, Estelle. |
| Alexandrium catenella (group IV) and Alexandrium tamarense (group III) (Dinophyceae) are two cryptic invasive phytoplankton species belonging to the A. tamarense species complex. Their worldwide spread is favored by the human activities, transportation and climate change. In order to describe their diversity in the Mediterranean Sea and understand their settlements and maintenances in this area, new microsatellite markers were developed based on Thau lagoon (France) samples of A. catenella and A. tamarense strains. In this study twelve new microsatellite markers are proposed. Five of these microsatellite markers show amplifications on A. tamarense and ten on A. catenella. Three of these 12 microsatellite markers allowed amplifications on both cryptic... |
| Tipo: Text |
Palavras-chave: Invasive species; Phytoplankton; Alexandrium; Dinophyceae; Microsatellite markers; Biogeography. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00189/30026/29398.pdf |
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| Silberfeld, Thomas; Bittner, Lucie; Fernandez-garcia, Cindy; Cruaud, Corinne; Rousseau, Florence; De Reviers, Bruno; Leliaert, Frederik; Payri, Claude E.; De Clerck, Olivier. |
| The brown algal genus Padina (Dictyotales, Phaeophyceae) is distributed worldwide in tropical and temperate seas. Global species diversity and distribution ranges, however, remain largely unknown. Species-level diversity was reassessed using DNA-based, algorithmic species delineation techniques based on cox3 and rbcL sequence data from 221 specimens collected worldwide. This resulted in estimates ranging from 39 to 61 putative species (ESUs), depending on the technique as well as the locus. We discuss the merits, potential pitfalls, and evolutionary and biogeographic significance of algorithmic species delineation. We unveil patterns whereby ESUs are in all but one case restricted to either the Atlantic or Indo-Pacific Ocean. Within ocean basins we find... |
| Tipo: Text |
Palavras-chave: Biogeography; Brown algae; Dictyotales; General mixed yule-coalescent model; Molecular phylogeny; Padina; Phaeophyceae; Species delineation. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00144/25568/23716.pdf |
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| Moalic, Yann; Desbruyeres, Daniel; Duarte, Carlos M.; Rozenfeld, Alejandro F.; Bachraty, Charleyne; Arnaud-haond, Sophie. |
| Defining biogeographic provinces to understand the history and evolution of communities associated with a given kind of ecosystem is challenging and usually requires a priori assumptions to be made. We applied network theory, a holistic and exploratory method, to the most complete database of faunal distribution available on oceanic hydrothermal vents, environments which support fragmented and unstable ecosystems, to infer the processes driving their worldwide biogeography. Besides the identification of robust provinces, the network topology allowed us to identify preferential pathways that had hitherto been overlooked. These pathways are consistent with the previously proposed hypothesis of a role of plate tectonics in the biogeographical history of... |
| Tipo: Text |
Palavras-chave: Biogeography; Deep sea ecology; Hydrothermal vents; Network analysis; Systems biology. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00063/17400/15164.pdf |
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| Winter, Amos; Henderiks, Jorijntje; Beaufort, Luc; Rickaby, Rosalind E. M.; Brown, Christopher W.. |
| Coccolithophores are one of the most abundant eukaryotic phytoplankton in the oceans and are distinguished by their ability to build calcitic platelets (coccoliths). Of the numerous species, Emiliania huxleyi is considered one of the major calcifiers in the pelagic ocean. There is growing concern that increasing levels of CO2 in the atmosphere and the subsequent acidification of the ocean may disrupt the production of coccoliths. Furthermore, any change in the global distribution and abundance of E. huxleyi relative to non-calcifying groups of phytoplankton (e. g. diatoms) will have important effects on the biogeochemical cycling of carbon and climatic feedbacks. We review different lines of evidence that suggest E. huxleyi is increasingly expanding its... |
| Tipo: Text |
Palavras-chave: Coccolithophores; Biogeography; Poles; Geochemical cycling. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00292/40350/38929.pdf |
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| Puerta, Patricia; Johnson, Clare; Carreiro-silva, Marina; Henry, Lea-anne; Kenchington, Ellen; Morato, Telmo; Kazanidis, Georgios; Luis Rueda, Jose; Urra, Javier; Ross, Steve; Wei, Chih-lin; Manuel Gonzalez-irusta, Jose; Arnaud-haond, Sophie; Orejas, Covadonga. |
| Circulation patterns in the North Atlantic Ocean have changed and re-organized multiple times over millions of years, influencing the biodiversity, distribution, and connectivity patterns of deep-sea species and ecosystems. In this study, we review the effects of the water mass properties (temperature, salinity, food supply, carbonate chemistry, and oxygen) on deep-sea benthic megafauna (from species to community level) and discussed in future scenarios of climate change. We focus on the key oceanic controls on deep-sea megafauna biodiversity and biogeography patterns. We place particular attention on cold-water corals and sponges, as these are ecosystem-engineering organisms that constitute vulnerable marine ecosystems (VME) with high associated... |
| Tipo: Text |
Palavras-chave: North Atlantic; Deep-sea; Biodiversity; Biogeography; Water masses; Vulnerable marine ecosystems. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00628/74006/73330.pdf |
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| Luo, Zhaohe; Yang, Weidong; Leaw, Chui Pin; Pospelova, Vera; Bilien, Gwenael; Liow, Guat Ru; Lim, Po Teen; Gu, Haifeng. |
| Blooms of the harmful dinoflagellate Akashiwo sanguinea are responsible for the mass mortality of fish and invertebrates in coastal waters. This cosmopolitan species includes several genetically differentiated clades. Four clonal cultures were established by isolating single cells from Xiamen Harbour (the East China Sea) for morphological and genetic analyses. The cultures displayed identical morphology but were genetically different, thus revealing presence of cryptic diversity in the study area. New details of the apical structure complex of Akashiwo sanguinea were also found. To investigate whether the observed cryptic diversity was related to environmental differentiation, 634 cells were obtained from seasonal water samples collected from 2008 to 2012.... |
| Tipo: Text |
Palavras-chave: Biogeography; Cryptic species; Gymnodinium sanguineum; Seasonal occurrence; Speciation. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00386/49771/50355.pdf |
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| Bellan-santini, D; Dauvin, J. |
| In the world, the Ampelisca genus is constituted by more than 140 species, which are found between 0 to 4000 m depth. Phylogeny, biology and ecology are the most important interest in this genus. The present analysis of new and older collections (E. Chevreux) have permitted to describe 11 new species. 41 species are listed in the north-eastern Atlantic fauna. These are different arguments to think that Ampelisca groups was actually in speciation. Two groups issued from a phenetic analysis are discriminated by their apomorphic levels. More than of the third are endemic species. 21 species are present only in one of the five biogeographic region. 23 species are limited to the continental shelf, 34 live up to the first 1000 meters and 4 are bathyal. 2 species... |
| Tipo: Text |
Palavras-chave: Ampeliscidae; Malacostraca; Biological collections; Phylogeny; Biogeography. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/1987/acte-1403.pdf |
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| Leroy, Boris; Dias, Murilo S.; Giraud, Emilien; Hugueny, Bernard; Jézéquel, Céline; Leprieur, Fabien; Oberdorff, Thierry; Tedesco, Pablo A. |
| Aim To define the major biogeographical regions and transition zones for freshwater fish species. Taxon Strictly freshwater species of actinopterygian fish (i.e. excluding marine and amphidromous fish families). Methods We based our bioregionalization on a global database of freshwater fish species occurrences in drainage basins, which, after filtering, includes 11,295 species in 2,581 basins. On the basis of this dataset, we generated a bipartite (basin‐species) network upon which we applied a hierarchical clustering algorithm (the Map Equation) to detect regions. We tested the robustness of regions with a sensitivity analysis. We identified transition zones between major regions with the participation coefficient, indicating the degree to which a basin... |
| Tipo: Text |
Palavras-chave: Actinopterygians; Biogeographical regions; Biogeography; Bioregionalization; Bioregions; Dispersal; Freshwater fish; Transition zones; Vicariance; Zoogeographical regions. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00514/62589/66985.pdf |
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| Balzano, Sergio; Percopo, Isabella; Siano, Raffaele; Gourvil, Priscillia; Chanoine, Melanie; Marie, Dominique; Vaulot, Daniel; Sarno, Diana. |
| Seventy-five diatoms strains isolated from the Beaufort Sea (Canadian Arctic) in the summer of 2009 were characterized by light and electron microscopy (SEM and TEM) as well as 18S and 28S rRNA gene sequencing. These strains group into 20 genotypes and 17 morphotypes and are affiliated with the genera Arcocellulus, Attheya, Chaetoceros, Cylindrotheca, Eucampia, Nitzschia, Porosira, Pseudo-nitzschia, Shionodiscus, Thalassiosira, Synedropsis. Most of the species have a distribution confined to the northern/polar area. Chaetoceros neogracilis and Chaetoceros gelidus were the most represented taxa. Strains of C. neogracilis were morphologically similar and shared identical 18S rRNA gene sequences, but belonged to four distinct genetic clades based on 28S rRNA,... |
| Tipo: Text |
Palavras-chave: Biogeography; ITS; ITS2 secondary structure; LSU; Morphology; Phylogeny; Polar diatoms; SSU. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00356/46718/46584.pdf |
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| Tsontos, Vm; Kiefer, Da. |
| Central to the development of an inventory of marine life and improved conceptual understanding of the mechanisms that dynamically shape species distribution patterns is the implementation of strategies aimed at enhancing assimilation and access to existing biogeographical information. Using the Internet as a medium, the Gulf of Maine Biogeographic Information System (GMBIS) project provides a framework and a set of reusable tools for the integration, visualization, analysis and dissemination of diverse types of biogeographical and oceanographic information. End-to-end viability of this approach is demonstrated in the context of a series of scientific storylines and a pilot application for the Gulf of Maine (GoM), a well-studied ecosystem that has been... |
| Tipo: Text |
Palavras-chave: Système d'information; Biogéographie; Biodiversité; Golfe du Maine; Information system; GIS; Biogeography; Biodiversity; Gulf of Maine. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00322/43302/43038.pdf |
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| Registros recuperados: 271 | |
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