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| Titel |
Explosive demographic expansion by dreissenid bivalves as a possible result of astronomical forcing |
| VerfasserIn |
M. Harzhauser  , O. Mandic, A. K. Kern, W. E. Piller , T. A. Neubauer, C. Albrecht, T. Wilke |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 12 ; Nr. 10, no. 12 (2013-12-23), S.8423-8431 |
| Datensatznummer |
250085489
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| Publikation (Nr.) |
 copernicus.org/bg-10-8423-2013.pdf |
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| Schlagwörter |
Demographie, Expansion, Fossilien, Bivalvia, Tortonium, Miozän, Neogen, Pannonsee, Pannonisches Becken, Wiener Becken, Paläoenvironment |
| Geograf. Schlagwort |
Österreich, Niederösterreich, Mödling (Bezirk), Hennersdorf |
| Blattnummer |
59 [Wien] |
| Blattnummer (UTM) |
5326 [Schwechat] |
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| Zusammenfassung |
Human induced range expansions of invasive dreissenid bivalves are of great
concern. However, the underlying biological processes are only poorly
understood, partly due to the lack of information on natural expansion
events. Here we use the extinct bivalve species Sinucongeria
primiformis as a model organism for testing natural (i.e. pre-Anthropocene)
blooms of dreissenid species in a lacustrine system of Lake Pannon during the
Tortonian (~ 10.5 Myr; late Miocene). A total of 600 samples from a consecutive
core were evaluated for the relative abundance of this pavement-forming
mollusc, which cover about eight millennia of late Miocene time with a decadal
resolution.
Our data indicate that the settlement by bivalves in the offshore
environment was limited mainly by bottom water oxygenation, which follows
predictable and repetitive patterns through time. These population
fluctuations might be related to solar cycles: successful dreissenid
settlement is recurring in a frequency known as the lower and upper
Gleissberg cycles with 50–80 and 90–120 yr periods. These cycles appear
to control regional wind patterns, which are directly linked to water mixing
of the lake. This is modulated by the even more prominent 500 yr cycle,
which seems to be the most important pacemaker for Lake Pannon hydrology. |
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