Detailed analysis of mixed-conifer and red fir forests were made from extensive, large vegetation sampling, systematically conducted throughout the Teakettle Experimental Forest. Mixed conifer is characterized by distinct patch conditions of closed-canopy tree clusters, persistent gaps and shrub thickets. This heterogeneous spatial structure provides contrasting microclimate, habitat and resource conditions...
Biological invasions pose one of the greatest threats to global biodiversity, but many naturalized invaders coexist with the native community. Community ecology theory provides a framework for understanding the mechanisms by which invaders might coexist with native species or exclude them from the community, thus informing management practices to maximize...
This study was conducted in the old-growth forests of Clatsop,
Tillamook, and Lincoln counties, Oregon. The three objectives of
the research were to describe and classify the near-climax plant
communities found within the forests, to relate the associes described
by a previous study to the forest communities characterized by the...
Early and late seral tree species were compared for inter-and intraspecific competitive ability; within-population genetic variability; and allocation patterns of soluble sugars and starch seasonally and in response to shade and nitrogen fertilization. Species were Douglas-fir (early seral) and western hemlock (late
seral) from a low elevation habitat; and noble...
The diversity of attitudes held by California community college faculty about Student Learning Outcomes (SLOs) was studied. In twelve semi-structured interviews, faculty informants explained how their work has changed as a result of increased standardization and accountability measures, how they value those changes, and how they expect the profession to...
Understory species associations and their association with tree species were examined on three intensively studied stands. We studied the chronosequence of understory species associated with different aged singleleaf pinyon (Pinus monophylla Torr. and Frem.) trees. Mid- to late pinyon-juniper understory succession was found to be more spatial than floristic in...