Seed availability as a dominant variable in Eastern white pine establishment in northern lower Michigan: a comparison of two cohorts.

Show simple item record Mueller, Jan en_US
dc.coverage.spatial UMBS Burn Plots en_US 2007-06-14T21:49:06Z 2007-06-14T21:49:06Z 1991 en_US
dc.description.abstract I examined how much variation in seed availability might explain observed variations in establishment patterns of eastern white pine (Pinus strobus) in northern lower Michigan. Numbers of established seedlings (seedlings still alive in midsummer of second growing season) of two cohorts, 1987 and 1990, were counted and compared for a study area comprising five forest plots, each at a different stage of white pine succession. I predicted the difference in numbers of seedlings established between the two cohorts to be proportional to relative differences in seed availability. Seed production was estimated to be approximately equal for both cohorts; therefore, the number of established seedlings was hypothesized to be equal with possible favoring of the 1990 cohort due to higher mothly precipitation during its first growing season relative to the 1987 seedlings. Establishment was slightly better for the 1987 cohort despite an apparent moisture disadvantage, although the difference in establishment success was not significantly differnt from zero. Results imply that establishment is less stochastic and, overall, less variable when seed availability is held constant. Even considerable differences in precipitation did not effect significant differences in establishment patterns. I argue seed availability to be the dominant variable where different white pine establishment patterns have been observed despite similar site conditions. en_US
dc.format.extent 276491 bytes
dc.format.extent 3144 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.subject Plant Population Biology en_US
dc.subject.classification Aspen en_US
dc.subject.classification Pine Woodlands en_US
dc.title Seed availability as a dominant variable in Eastern white pine establishment in northern lower Michigan: a comparison of two cohorts. en_US
dc.type Working Paper en_US
dc.subject.hlbsecondlevel Natural Resource and Environment en_US
dc.subject.hlbtoplevel Science en_US
dc.contributor.affiliationum Biological Station, University of Michigan en_US
dc.contributor.affiliationumcampus Ann Arbor en_US
dc.description.bitstreamurl en_US
dc.description.filedescription Description of 2735.pdf : Access restricted to on-site users at the U-M Biological Station. en_US
dc.owningcollname Biological Station, University of Michigan (UMBS)
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