NDLI: Climate and the autumnal moth (Epirrita autumnata) at Mountain Birch (Betula pubecens ssp. czerepanovii) Treelines in northern Sweden.

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Climate and the autumnal moth (Epirrita autumnata) at Mountain Birch (Betula pubecens ssp. czerepanovii) Treelines in northern Sweden.

Content Provider	Semantic Scholar
Author	Young, Amanda B.
Copyright Year	2010
Abstract	Climate and the Autumnal Moth (Epirrita autumnata) at Mountain Birch (Betula pubecens ssp. czerepanovii) Treelines in Northern Sweden. (August 2008) Amanda Beatrice Young, B.A., Gustavus Adolphus College Chair of Advisory Committee: Dr. David M. Cairns The main objectives of this investigation were to determine the impact of climate on mountain birch (Betula pubecens ssp. czerepanovii (Orlova)) growth and to develop a regional chronology of autumnal moth outbreaks. To accomplish the objective, cores of mountain birch were taken from 21 sites in Norrbotten, Sweden. Tree-ring chronologies were developed for each site. Climatic influences were determined by correlating ring widths to climatic variables (average monthly temperature, average monthly precipitation and NAO). Outbreaks were recovered from the ring width indices using the non-host method with Scots pine (Pinus sylvestris (L.)) as the non-host. This method removes the climatic influence on growth to enhance other factors. Patterns of synchrony and regional outbreaks were detected using regression and cluster analysis techniques. The primary climatic influences on the tree ring growth of mountain birch are June and July temperatures; precipitation during October is of secondary importance. Climate explained 46% of yearly tree ring width variation. Outbreaks of the autumnal moth occur at varying time intervals depending on the scale of study. Intervals between
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://oaktrust.library.tamu.edu/bitstream/handle/1969.1/ETD-TAMU-2008-08-58/Young.pdf?isAllowed=y&sequence=2
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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