Managers Corner
The goal of the manager’s corner is to help managers make informed decisions through sharing science, research, and its applications from the HJ Andrews Experimental Forest. To this end, we provide management-relevant synopses of research publications with key words to help manager’s search for topics of interest.
Burn severity and pre-fire seral state interact to shape vegetation responses to fire in a young, western Cascade Range forest
Do young forests respond to fire differently than older forests? Does pre-fire seral stage impact species richness and diversity during recovery? The authors investigated the response of understory plants to fire in a previously logged forest. They measured species composition, richness, diversity, and evenness before and after a controlled burn. The authors described changes for early-seral annuals and perennials and for forest generalists, which are mainly shade-tolerant shrubs. Keywords: early seral, fire severity, forest understory, functional group, seral state, species diversity. Download PDF.
Crown closure affects endophytic leaf mycobiome compositional dynamics over time in Pseudotsuga menziesii var. menziesii
Tree canopies are home to communities of fungi that grow into the tree needle tissue without causing disease. Theses fungal communities can modulate nutrient uptake, stomatal conductance, and foliar disease severity. Research at the landscape and regional scales has shown that microclimate can impact variation in fungal community composition. The authors set out to determine how fungal community composition and diversity varied vertically in eight trees canopies using LiDAR to describe canopy closure, a measure of exposure level. Keywords: Nothophaeocryptopus, Rhabdocline, fungi, endosphere, old-growth, community ecology, ITS, metabarcoding, airborne LiDAR. Download PDF.
Spatial and Temporal Patterns in Atmospheric Deposition of Dissolved Organic Carbon
How are terrestrial carbon and atmospheric carbon related to deposition of dissolved organic carbon? What is the role of atmospheric deposition in terrestrial carbon cycling globally? Are there spatial or temporal patterns in the deposition of dissolved organic carbon (DOC)? The researchers examined data collected for at least one year at 70 sites ranging from 40° S to 66° N. They evaluated seasonal and interannual patterns, whether patterns differed with latitude, and the relationships between DOC deposition and precipitation and between DOC deposition and potential sources of atmospheric carbon. Keywords: dissolved organic carbon, atmospheric deposition, terrestrial carbon influx, precipitation chemistry, carbon cycling, global synthesis. Download PDF.