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  • Submerged macrophytes  (2)
  • *Animal Migration  (1)
  • 1
    Publication Date: 2014-02-11
    Description: The reorganization of patterns of species diversity driven by anthropogenic climate change, and the consequences for humans, are not yet fully understood or appreciated. Nevertheless, changes in climate conditions are useful for predicting shifts in species distributions at global and local scales. Here we use the velocity of climate change to derive spatial trajectories for climatic niches from 1960 to 2009 (ref. 7) and from 2006 to 2100, and use the properties of these trajectories to infer changes in species distributions. Coastlines act as barriers and locally cooler areas act as attractors for trajectories, creating source and sink areas for local climatic conditions. Climate source areas indicate where locally novel conditions are not connected to areas where similar climates previously occurred, and are thereby inaccessible to climate migrants tracking isotherms: 16% of global surface area for 1960 to 2009, and 34% of ocean for the 'business as usual' climate scenario (representative concentration pathway (RCP) 8.5) representing continued use of fossil fuels without mitigation. Climate sink areas are where climate conditions locally disappear, potentially blocking the movement of climate migrants. Sink areas comprise 1.0% of ocean area and 3.6% of land and are prevalent on coasts and high ground. Using this approach to infer shifts in species distributions gives global and regional maps of the expected direction and rate of shifts of climate migrants, and suggests areas of potential loss of species richness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burrows, Michael T -- Schoeman, David S -- Richardson, Anthony J -- Molinos, Jorge Garcia -- Hoffmann, Ary -- Buckley, Lauren B -- Moore, Pippa J -- Brown, Christopher J -- Bruno, John F -- Duarte, Carlos M -- Halpern, Benjamin S -- Hoegh-Guldberg, Ove -- Kappel, Carrie V -- Kiessling, Wolfgang -- O'Connor, Mary I -- Pandolfi, John M -- Parmesan, Camille -- Sydeman, William J -- Ferrier, Simon -- Williams, Kristen J -- Poloczanska, Elvira S -- England -- Nature. 2014 Mar 27;507(7493):492-5. doi: 10.1038/nature12976. Epub 2014 Feb 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology, Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, PA37 1QA, Scotland, UK. ; School of Science and Engineering, University of the Sunshine Coast, Maroochydore, Queensland QLD 4558, Australia. ; 1] Climate Adaptation Flagship, CSIRO Marine and Atmospheric Research, Ecosciences Precinct, GPO Box 2583, Brisbane, Queensland 4001, Australia [2] Centre for Applications in Natural Resource Mathematics (CARM), School of Mathematics and Physics, The University of Queensland, St Lucia, Queensland 4072, Australia. ; Department of Genetics, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia. ; Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3280, USA. ; 1] Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth SY23 3DA, UK [2] Centre for Marine Ecosystems Research, Edith Cowan University, Perth 6027, Australia. ; The Global Change Institute, The University of Queensland, Brisbane, Queensland 4072, Australia. ; 1] The UWA Oceans Institute, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia [2] Department of Global Change Research, IMEDEA (UIB-CSIC), Instituto Mediterraneo de Estudios Avanzados, Esporles 07190, Spain [3] Department of Marine Biology, Faculty of Marine Sciences, King Abdulaziz University, PO Box 80207, Jeddah 21589, Saudi Arabia. ; 1] Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, USA [2] Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot SL5 7PY, UK. ; Bren School of Environmental Science and Management, University of California, Santa Barbara, California 93106, USA. ; 1] GeoZentrum Nordbayern, Palaoumwelt, Universitat Erlangen-Nurnberg, Loewenichstrasse 28, 91054 Erlangen, Germany [2] Museum fur Naturkunde, Invalidenstr asse 43, 10115 Berlin, Germany. ; Department of Zoology and Biodiversity Research Centre, University of British Columbia, Vancouver V6T 1Z4, Canada. ; School of Biological Sciences, Australian Research Council Centre of Excellence for Coral Reef Studies, The University of Queensland, Brisbane, Queensland 4072, Australia. ; 1] Integrative Biology, University of Texas, Austin, Texas 78712, USA [2] Marine Institute, Drake Circus, University of Plymouth, Devon PL4 8AA, UK. ; Farallon Institute for Advanced Ecosystem Research, 101 H Street, Suite Q, Petaluma, California 94952, USA. ; Climate Adaptation Flagship, CSIRO Ecosystem Sciences, GPO Box 1700, Canberra, Australian Capital Territory 2601, Australia. ; Climate Adaptation Flagship, CSIRO Marine and Atmospheric Research, Ecosciences Precinct, GPO Box 2583, Brisbane, Queensland 4001, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24509712" target="_blank"〉PubMed〈/a〉
    Keywords: *Animal Migration ; Animals ; Australia ; Biodiversity ; *Climate ; *Climate Change ; *Ecosystem ; *Geographic Mapping ; *Geography ; Models, Theoretical ; Population Dynamics ; Seawater ; Temperature ; Time Factors ; Uncertainty
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Oecologia 72 (1987), S. 612-617 
    ISSN: 1432-1939
    Keywords: Submerged macrophytes ; 3/2 law ; Submerged-terrestrial plant comparison ; Light levels ; Growth form
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Crowded stands of submerged plants in Québec lakes have a weight-density with a shallower, but not significantly different, slope and an intercept 10 fold lower than those for terrestial stands. The examination of a larger data set including both freshwater and submerged macrophytes supported these differences. This data set suggested that those differences, as well as those among submerged stands, are largely attributable to the light levels incident upon the stand. The differences in weight-density relationships between submerged and terrestrial stands were paralleled by a smaller biomass per unit volume outgrown of the submerged plants, as predicted from the dimensional examination of the weight-density relationship. The variations in biomass per unit volume associated to differences in the species growth form explained deviations about the weightdensity relationship of stands growing under relatively similar light conditions.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1939
    Keywords: Submerged macrophytes ; Annuals ; Seed size ; Seed bank ; Temporary Mediterranean marsh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The abundance and composition of the submerged macrophyte seed bank in the Doñana marsh (southwestern Spain) was evaluated to assess its relationship with the overlying vegetation. The results obtained demonstrate the existence of a dense seed-bank, both in terms of the number of seeds and their biomass, which represented about 10% (5% for angiosperms and 〉20% for Charophyta) of the total plant biomass, which ensures the maintenance of the annual submerged macrophyte populations of the seasonally inundated Donñana marsh. Seed bank and established vegetation were coupled, as reflected in the existence of significant correlations between their structure and abundance. This coupling was lacking for Charophyta, whose oospores are widespread and abundant across the marsh, even at locations where they are absent, or rare, in the established vegetation. These differences between the seed bank of annual angiosperms and Charophyta appear to reflect, in part, structural differences between angiosperm seeds and Charophyta oospores, with important ecological consequences. An important aspect of these differences is the allocation of Charophyta reproductive effort to many small propagules lacking embryo storage, compared to those of angiosperms, which ensures their efficient dispersal and numerical abundance in the seed bank.
    Type of Medium: Electronic Resource
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