Numbers of both liverwort and forest species were significantly reduced on clear-cuts and these differences remained significant, although smaller, 30 50 years after clear-cutting.
We compared the epigaeic assemblages among stands of three ages: (1) young (8 25 years) and (2) middle-aged (40 58 years) stands regrown after clear-cutting, and mature stands (80 130 years) that had been selectively cut historically but never clear felled.
Among the photographs titled "Clatsop County, Oregon" (1999-2003) are several close-ups of mountains after clear-cutting, on which little remains standing.
After clear-cutting a year earlier, the ground was cultivated 3 months before planting.
Knowledge is accumulating from studies of permanent plots before and shortly after clear-cutting, but for later stages only comparative studies have been published (space-for-time substitutions).
Higher tree density and earlier balsam fir (Abies balsamea) regeneration after clear-cutting than after fire partly explained these differences in animal response to the type of disturbance.
In a pair wise design we compared snail abundance, species density, and species composition between 13 old seminatural stream-side stands and 13 matched young stands developed 40 60 years after clear-cutting.
To assess short-term changes and the function of buffer strips we compared the bryophyte community in permanent 0.1 ha plots of mature forest before and after clear-cutting.
Populations of forest floor bryophytes that persist under those patches of tree canopy remaining after clear-cutting could reduce dispersal distances and thereby contribute to conservation of species across the landscape.
In this study, I combined this comparative approach with direct monitoring of the pace of assemblage recovery in boreal stands regrown after clear-cutting half a century ago (treatment stands).
