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Digitale Medien

A TECHNIQUE TO RECONSTRUCT RIVER DISCHARGE HISTORY FROM TREE-RINGS (1983)

Wendland, Wayne M. ; Watson-Stegner, Donna

Oxford, UK : Blackwell Publishing Ltd

Journal of the American Water Resources Association 19 (1983), S. 0

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ISSN: 1752-1688

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Architektur, Bauingenieurwesen, Vermessung , Geographie

Notizen: : Cores were obtained from several tree species located both on a river floodplain and a nearby terrace. A ratio of annual tree growth on floodplains to terrace growth was developed and shown to be related to the annual river discharge. Growth ratios from the time prior to written records can therefore be used to reconstruct river discharge and infer past unrecorded flood frequency. Oak and basswood ratios yielded the best models for discharge reconstruction, whereas those of elm and birch were less useful. This method permits reconstruction of river discharge from an assemblage of growth cores obtained within a relatively small area.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1752-1688.1983.tb05311.x

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Digitale Medien

Genetic kin recognition: honey bees discriminate between full and half sisters (1983)

Getz, Wayne M. ; Smith, Katherine B.

[s.l.] : Nature Publishing Group

Nature 302 (1983), S. 147-148

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Queen honey bees mate with a number of different drones before they lay their first eggs11. The sperm, to some extent, mix in the spermatheca and the hive contains several distinct patrilineal worker groups of full sisters while the workers are matrilineal half sisters across groups12'13. In ...