ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Publication Date: 2008-11-07
    Description: The population cycles of rodents at northern latitudes have puzzled people for centuries, and their impact is manifest throughout the alpine ecosystem. Climate change is known to be able to drive animal population dynamics between stable and cyclic phases, and has been suggested to cause the recent changes in cyclic dynamics of rodents and their predators. But although predator-rodent interactions are commonly argued to be the cause of the Fennoscandian rodent cycles, the role of the environment in the modulation of such dynamics is often poorly understood in natural systems. Hence, quantitative links between climate-driven processes and rodent dynamics have so far been lacking. Here we show that winter weather and snow conditions, together with density dependence in the net population growth rate, account for the observed population dynamics of the rodent community dominated by lemmings (Lemmus lemmus) in an alpine Norwegian core habitat between 1970 and 1997, and predict the observed absence of rodent peak years after 1994. These local rodent dynamics are coherent with alpine bird dynamics both locally and over all of southern Norway, consistent with the influence of large-scale fluctuations in winter conditions. The relationship between commonly available meteorological data and snow conditions indicates that changes in temperature and humidity, and thus conditions in the subnivean space, seem to markedly affect the dynamics of alpine rodents and their linked groups. The pattern of less regular rodent peaks, and corresponding changes in the overall dynamics of the alpine ecosystem, thus seems likely to prevail over a growing area under projected climate change.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kausrud, Kyrre L -- Mysterud, Atle -- Steen, Harald -- Vik, Jon Olav -- Ostbye, Eivind -- Cazelles, Bernard -- Framstad, Erik -- Eikeset, Anne Maria -- Mysterud, Ivar -- Solhoy, Torstein -- Stenseth, Nils Chr -- England -- Nature. 2008 Nov 6;456(7218):93-7. doi: 10.1038/nature07442.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Ecological and Evolutionary Synthesis, University of Oslo, PO Box 1066 Blindern, N-0316 Oslo, Norway.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18987742" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arvicolinae/*physiology ; Birds/physiology ; *Ecosystem ; *Greenhouse Effect ; History, 20th Century ; History, 21st Century ; Humidity ; Models, Biological ; Norway ; Population Dynamics ; Seasons ; Snow ; Temperature
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of wildlife research 45 (1999), S. 208-211 
    ISSN: 1439-0574
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Gehörnte Ricken und Rehböcke ohne Gehörn fanden schon früher in der Literatur Erwähnung, jedoch wurde über die Häufigkeit des Auftretens dieser Phänomene nicht berichtet. Die Häufigkeit der Rosenstöcke betrug in einer norwegischen Rehpopulation bei 50 Rickenkitzen 6 %, bei 29 Schmalrehen (1,5 Jahre alt) 6,9 %, bei 20 Ricken im Alter von 3,5 Jahren und älter 14,8 %. Nur eine Ricke (1,3 %) trug ein echtes Gehörn. Obgleich die Unterschiede in der Häufigkeit des Auftretens von Rosenstöcken unter den Ricken verschiedenen Alters nicht signifikant sind, tendiert die Länge der Stirnauswüchse dazu, bei jüngeren Individuen kürzer zu sein als bei älteren. Unter 85 Rehböcken, die in der gleichen Periode erlegt wurden, besaß nur ein 2,5 Jahre alter Bock Rosenstöcke, aber kein Gehörn.
    Abstract: Résumé Le cas de chevrettes portant des bois et de brocards dépourvus de bois a d'ores et déjà été mentionné dans la littérature mais il n'a jamais été rendu compte de la fréquence de ce phénomène. Nous avons trouvé, dans une population norvégienne de chevreuils, que l'occurrence de pivots était de 6 % parmi 50 faons femelles, de 6,9 % parmi 29 femelles âgées de 18 mois, de 0 % parmi 20 femelles de 30 mois et de 14,8 % parmi 27 femelles de 3 ans et plus; une seule chevrette (1,3 %) portait de vrais bois. Cependant, si les différences dans les fréquences de pivots parmi les chevrettes de différents âges n'était pas statistiquement significatives, la longueur de ces apophyses crâniennes tendait à être moindre chez les jeunes sujets que chez les sujets plus âgés. Parmi les 85 brocards tirés au cours de la même période, seul un brocard de 2,5 ans (1,1 %) possédait des pivots mais non des bois.
    Notes: Summary Female roe deer with antlers and male roe deer without antlers have earlier been mentioned in the literature, but the frequency of these phenomena has never been reported. We found that the frequency of pedicles was 6.0 % among 50 female fawns, 6.9 % among 29 females 1.5 year old, 0 % among 20 females 2.5 years old, and 14.8 % among 27 females 3.5 years or older in a Norwegian roe deer population; only one female (1.3 %) grew true antlers. However, the differences in the frequencies of pedicles among does of various ages was not statistically significant, but the length of the cranial outgrowth in younger individuals tended to be shorter than that of older ones. Among the 85 male roe deer shot in the same period, only one 2.5 year old buck (1.1 %) posessed pedicles, but no antlers.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...