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The hypothesis of hydrochorous dissemination of populations of conifers
Authors:S. N. Sannikov  N. S. Sannikova
Affiliation:(1) Botanical Garden, Ural Division, Russian Academy of Sciences, ul. Vos’mogo Marta 202, Yekaterinburg, 620144, Russia
Abstract:A comparative analysis of field observations and experiments on the distance and rate of dispersal of self-sown Scotch pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.) progeny has shown that the rate of their hydrochorous dissemination downstream is an order of magnitude higher than the rate of dispersal in upland areas. A hypothesis assigning priority to the role of hydrochory in the expansion of conifer populations to the tundra (periglacial) zone along with climate warming has been formulated and substantiated by comparative isozyme analysis of populations in transects lying along and across rivers.
Keywords:Scotch pine  Norway spruce  population  dissemination  anemochory  hydrochory  genetic distance
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