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| Registros recuperados: 212 | |
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| Jebbar, Mohamed; Hickman-lewis, Keyron; Cavalazzi, Barbara; Taubner, Ruth-sophie; Rittmann, Simon K.-m. R.; Antunes, Andre. |
| The icy moons of the outer Solar System harbor potentially habitable environments for life, however, compared to the terrestrial biosphere, these environments are characterized by extremes in temperature, pressure, pH, and other physico-chemical conditions. Therefore, the search for life on these icy worlds is anchored on the study of terrestrial extreme environments (termed “analogue sites”), which harbor microorganisms at the frontiers of polyextremophily. These so-called extremophiles have been found in areas previously considered sterile: hot springs, hydrothermal vents, acidic or alkaline lakes, hypersaline environments, deep sea sediments, glaciers, and arid areas, amongst others. Such model systems and communities in extreme terrestrial environments... |
| Tipo: Text |
Palavras-chave: Extremophiles; Prokaryotes; Metabolism; Diversity; Adaptation; Space explorat. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00606/71771/70275.pdf |
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| Pernet, Fabrice; Browman, Howard I. |
| Aquaculture now produces more seafood than wild capture fisheries and this production is expected to at least double by 2050. Representing almost half of global production, marine aquaculture will contribute to sustainably feeding the growing humanity. However, climate change will undoubtedly challenge the future growth of marine aquaculture. Temperature and sea-level rise, shifts in precipitation, freshening from glacier melt, changing ocean productivity, and circulation patterns, increasing occurrence of extreme climatic events, eutrophication, and ocean acidification are all stressors that will influence marine aquaculture. The objective of this themed article set was to bring together contributions on the broad theme of the potential impacts,... |
| Tipo: Text |
Palavras-chave: Adaptation; Bivalve; Blue economy; Carbon; Climate change; Marine diseases; Mitigation; Ocean acidification; Plasticity; Salmon; Seaweed; Sustainability. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00682/79406/81951.pdf |
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| Cognat, Mathis; Ganthy, Florian; Auby, Isabelle; Barraquand, Frederic; Rigouin, Loic; Sottolichio, Aldo. |
| The relative impact of light, depth, hydrology, hydrodynamics, sediment and nutrients on growth of the seagrass Zostera noltei was investigated in Arcachon Bay, where the extent of seagrass beds has been decreasing for 20 years. A comprehensive multi-parameter survey of 9 sites was conducted monthly over one year. A three-parameter logistic growth model was fitted to biomass data to unravel the relative contributions of environmental factors on seagrass growth. The present study highlights the fact that, in addition to the dominant positive effect of light on plant growth, the hydrological and hydrodynamic parameters were important drivers for Z. noltei growth at the scale of the whole Bay. At the scale of individual sites, other factors such as macroalgal... |
| Tipo: Text |
Palavras-chave: Physical parameters; Light; Hydrodynamics; Adaptation; Statistical growth model. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00451/56229/57789.pdf |
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| Diop, Bassirou; Sanz, Nicolas; Junior Duplan, Yves Jamont; Guene, El Hadji Mama; Blanchard, Fabian; Pereau, Jean-christophe; Doyen, Luc. |
| This paper deals with fishery management in the face of the ecological and economic effects of global warming. To achieve this, a dynamic bioeconomic model and model-based scenarios are considered, in which the stock's growth function depends on the sea surface temperature. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over the period 1993–2009. Three fishing effort strategies are then compared under two contrasted IPCC climate scenarios (RCP 8.5 and RCP 2.6). A first harvesting strategy maintains the Status Quo in terms of fishing effort. A more ecologically-oriented strategy based on the closure of the fishery is also considered. A third strategy, which relates to Maximum Economic Yield (MEY), is... |
| Tipo: Text |
Palavras-chave: Renewable resources; Fishery bioeconomic model; Climate change; Climate scenarios; Adaptation; Shrimp. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00453/56418/58115.pdf |
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| Pivotto, I. D.; Nerini, D.; Masmoudi, M.; Kara, H.; Chaoui, L.; Aurelle, D.. |
| Climate change has a strong impact on marine ecosystems, including temperate species. Analysing the diversity of thermotolerance levels within species along with their genetic structure enables a better understanding of their potential response to climate change. We performed this integrative study on the Mediterranean octocoral Eunicella cavolini, with samples from different depths and by means of a common garden experiment. This species does not host photosynthetic Symbiodinium, enabling us to focus on the cnidarian response. We compared the thermotolerance of individuals from 20 m and 40 m depths from the same site and with replicates from the same colony. On the basis of an innovative statistical analysis of necrosis kinetics and risk, we demonstrated... |
| Tipo: Text |
Palavras-chave: Climate change; Adaptation; Acclimatization; Eunicella cavolini; Mediterranean sea; Population genetics. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00371/48264/48637.pdf |
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| Meur-ferec, Catherine; Le Berre, Iwan; Cocquempot, Lucie; Guillou, Elisabeth; Henaff, Alain; Lami, Thibaut; Le Dantec, Nicolas; Letortu, Pauline; Philippe, Manuelle; Nous, Camille. |
| Coastal development, combined with the intrinsic mobility of coasts and the context of climate change, tends to increase the vulnerability of coastal territories. This article proposes, on one hand, a renewed interdisciplinary approach to the concept of vulnerability allowing to overcome the nature/society dichotomy. On the other hand, the paper presents an inter-sectoral researchers-managers approach to build a series of indicators to monitor the four components of systemic vulnerability (hazards, stakes, management and representations). These indicators lay the ground for an integrated observatory, source of data for research as well as to inform decisions regarding the adaptation of coastal territories. |
| Tipo: Text |
Palavras-chave: Coastal risks; Erosion; Sea-flooding; Vulnerability; Interdisciplinary; Intersectorality; Indicators; Adaptation; Observatory. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00629/74122/73559.pdf |
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| Stachowski-haberkorn, Sabine; Jerome, Marc; Rouxel, Julien; Khelifi, Celia; Rince, Maeva; Burgeot, Thierry. |
| To investigate the ability of microalgae to develop stable, long-term resistance to herbicides, the marine microalga Tetraselmis suecica was exposed to the herbicide diuron (5 µg/L) for a 43-generation exposure period followed by a 12-generation depuration phase. During the first 25 generations, diuron-exposed cultures showed doubling times ranging from 1.95 to 2.6 days, which was 2 to 2.5-fold longer than control cultures. Between generations 25 and 38, during diuron exposure, two out of the three exposed cultures exhibited a spontaneous drop in doubling time. These results provided evidence of culture adaptation to diuron. To assess persistence of the diuron adaptation observed on growth performance, one of the adapted cultures (D3) was maintained for 12... |
| Tipo: Text |
Palavras-chave: Microalgae; Diuron; Multigenerational; Adaptation; Flow cytometry. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00146/25718/23796.pdf |
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| Peijnenburg, K.T.C.A.; Goetze, E.. |
| Open ocean zooplankton often have been viewed as slowly evolving species that have limited capacity to respond adaptively to changing ocean conditions. Hence, attention has focused on the ecological responses of zooplankton to current global change, including range shifts and changing phenology. Here, we argue that zooplankton also are well poised for evolutionary responses to global change. We present theoretical arguments that suggest plankton species may respond rapidly to selection on mildly beneficial mutations due to exceptionally large population size, and consider the circumstantial evidence that supports our inference that selection may be particularly important for these species. We also review all primary population genetic studies of open ocean... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Adaptation; Climate change; Marine; Oceanic; Selection; Zooplankton; 42.72; 42.94. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/470572 |
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I made use of the known dates of reclamation (and of afforestations) in the IJsselmeerpolders in The Netherlands to assess evolutionary adaptation in Cepaea nemoralis. At 12 localities (three in each polder), I sampled a total of 4390 adult individuals in paired open and shaded habitats, on average 233m apart, and scored these for genetic shell colour polymorphisms. The results show (highly) significant differentiation at most localities, although the genes involved differed per locality. Overall, though, populations in shaded habitats had evolved towards darker shells than those in adjacent open habitats, whereas a 'Cain & Sheppard' diagram (proportion yellow shells plotted against ‘effectively unbanded’ shells) failed to reveal a clear pattern. This might suggest that thermal selection is more important than visual selection in generating this pattern. Trait differentiation, regardless of whether they were plotted against polder age or habitat age, showed a linear increase of differentiation with time, corresponding to a mean rate of trait evolution of 15–31 kilodarwin. In conclusion, C. nemoralis is capable of rapid and considerable evolutionary differentiation over 1–25 snail generations, though equilibrium may be reached only at longer time scales
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Naturalis | |
| Schilthuizen, M.. |
| I made use of the known dates of reclamation (and of afforestations) in the IJsselmeerpolders in The Netherlands to assess evolutionary adaptation in Cepaea nemoralis. At 12 localities (three in each polder), I sampled a total of 4390 adult individuals in paired open and shaded habitats, on average 233m apart, and scored these for genetic shell colour polymorphisms. The results show (highly) significant differentiation at most localities, although the genes involved differed per locality. Overall, though, populations in shaded habitats had evolved towards darker shells than those in adjacent open habitats, whereas a 'Cain & Sheppard' diagram (proportion yellow shells plotted against ‘effectively unbanded’ shells) failed to reveal a clear pattern. This... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Predation; Crypsis; Contemporary evolution; Gastropoda; Mollusca; Adaptation; 42.73. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/445782 |
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| Wesselingh, F.P.. |
| Miocene deposits in western Amazonia and adjacent areas of South America harbour a diverse suite of endemic corbulid bivalves, commonly referred to as Pachydontinae, that show a wide variety of morphologies. Especially in the Miocene Pebas Formation (Peru, Colombia and Brazil), this group diversified spectacularly. Since these corbulids (a cosmopolitan marine and perimarine bivalve family) occur with freshwater taxa and yield isotope signals strongly indicative of freshwater settings, the success of this group in inland basins of Miocene northwestern South America is surprising. In this paper it is argued that a combination of adaptations to fluid bottom substrates, common dysoxia and high predation intensities explains their abundance, their morphological... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Corbulidae; Pachydontinae; Miocene; Amazonia; Evolution; Adaptation; 42.73; 38.22. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/209734 |
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| Frías,Daniel. |
| Rachiptera limbata Bigot develops on Baccharis linearis (R. et Pav.) in the areas around Santiago, Chile. The larvae feed on stem tissues and secrete a liquid that hardens to form a protective feeding and pupation chamber. The immature stages of Neotropical species of Tephritinae are poorly known. In this paper, the morphology of the immature stages of R. limbata are described and compared, in a phylogenetic context, with other Tephritinae species. Antennomaxillary complex, pads, oral ridge, cephalopharyngeal skeleton, anterior and posterior spiracles and anal lobes of first-, second-, third-instar larvae and pupae were studied with optical and scanning electron microscopy. The cephalopharyngeal skeleton is darkly sclerotized and shows an opening or window... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptation; Neoteny; Plesiomorphic; Apomorphic traits. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000500006 |
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| Carabalí,Arturo; Belloti,Anthony C; Montoya-Lerma,James. |
| Bemisia tabaci (Gennadius) is one of the most important pests of cassava in Africa and several countries of Asia due to the damage caused by direct feeding, the excretion of honeydew, and its capacity as a vector of cassava mosaic geminivirus. There is a general consensus that B. tabaci is a complex of morphologically indistinguishable populations with different biotypes. In the Americas, the polyphagous biotype B does not appear to feed on cassava. Recent studies indicate that it is possible, however, for biotype B to gradually adapt to cassava using phylogenetically related hosts. Therefore, the possibility that some wild species of cassava constitute intermediate hosts in the adaptation process may lead to the establishment of biotype B on commercial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptation; Trophic relationship; Whitefly. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000400015 |
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| Fabrizzi,Fernando; Moraes,Gilberto; Hackbarth,Araceli; Almeida,Luciana Cristina de; Arbeláez-Rojas,Gustavo; Nunes,Cleujosí da Silva. |
| In fish, studies on a wide variety of physiological effects of exercise have been reported since a long time. It has been attributed special attention to some types of exercise, however, its application as a healthful practice in the rearing and welfare of farming fish is rising in last few years. In this particular, long-term intermittent sustained swimming (ISS) has been not yet explored. In this work, the freshwater fish Brycon amazonicus was submitted to (ISS) for 30 days at velocity of 1.0 body-length sec-1 for 12h interspaced by 12h under still water. Hematology and metabolism were evaluated. Exercised fish decreased 30% the erythrocyte number and hemoglobin was unvaried. The stores of liver glycogen and muscular triacylglycerol (TAG) were increased... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptation; Exercise; Fish; Glycogen; Metabolism; Triacylglycerol. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000200425 |
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| Registros recuperados: 212 | |
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