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Articles 1 - 5 of 5
Full-Text Articles in Forest Sciences
Influence Of Strip Clearcuts, Deer Exclusion And Herbicide On Initial Sapling Recruitment In Northern Hardwood Forests, Stefan Hupperts, Christopher R. Webster, Robert Froese, Brandon Bal, Yvette L. Dickinson
Influence Of Strip Clearcuts, Deer Exclusion And Herbicide On Initial Sapling Recruitment In Northern Hardwood Forests, Stefan Hupperts, Christopher R. Webster, Robert Froese, Brandon Bal, Yvette L. Dickinson
Michigan Tech Publications
Sapling recruitment in hardwood forests is often suppressed by overstory shade, interspecific competition, and browsing pressure from white-tailed deer (Odocoileus virginianus Zimmerman). In some northern hardwood stands, these three interacting factors may cause persistent recruitment failure of the dominant canopy species, sugar maple (Acer saccharum Marsh.), into the sapling size class. In this study, we compared initial (two-year) sugar maple and hophornbeam (Ostrya virginiana ((Mill.) K. Koch) seedling and sapling recruitment in strip clearcuts to strip selection cuts, with combinations of herbicide and deer exclosures, in a northern hardwood forest with limited sugar maple sapling recruitment. We found that sugar …
Plant Community Response To Novel Silvicultural Treatments In Great Lakes Northern Hardwoods, Stefan F. Hupperts
Plant Community Response To Novel Silvicultural Treatments In Great Lakes Northern Hardwoods, Stefan F. Hupperts
Dissertations, Master's Theses and Master's Reports
The objective of this dissertation is to assess plant community response across a range of silvicultural disturbances and test ecological hypotheses to better inform ecologists and forest managers. To provide context for the utility of revising silvicultural systems, I review natural disturbance regimes and historical practices that have shaped contemporary Great Lakes northern hardwood forests (Chapter 2). Further, I identify important ways to expand the silvicultural toolbox and better emulate natural disturbance regimes. Building on this theoretical underpinning, I investigate the initial regeneration and plant community response to two novel silvicultural experiments: the Northern Hardwood Experiment for Enhancing Diversity (NHSEED) …
Within-Canopy Experimental Leaf Warming Induces Photosynthetic Decline Instead Of Acclimation In Two Northern Hardwood Species, Kelsey R. Carter, Molly A. Cavaleri
Within-Canopy Experimental Leaf Warming Induces Photosynthetic Decline Instead Of Acclimation In Two Northern Hardwood Species, Kelsey R. Carter, Molly A. Cavaleri
College of Forest Resources and Environmental Science Publications
Northern hardwood forests are experiencing higher temperatures and more extreme heat waves, potentially altering plant physiological processes. We implemented in-situ leaf-level warming along a vertical gradient within a mature forest canopy to investigate photosynthetic acclimation potential of two northern hardwood species, Acer saccharum and Tilia americana. After 7 days of +3°C warming, photosynthetic acclimation was assessed by measuring differences between heated and control photosynthetic rates (Aopt) at leaf optimum temperatures (Topt). We also measured the effects of warming and height on maximum rates of Rubisco carboxylation, stomatal conductance, transpiration, and leaf traits: leaf …
Effects Of In-Situ Leaf-Level Canopy Warming In A Northern Hardwood Forest, Kelsey Carter
Effects Of In-Situ Leaf-Level Canopy Warming In A Northern Hardwood Forest, Kelsey Carter
Dissertations, Master's Theses and Master's Reports
Rising mean annual temperatures due to climate change have intensified the need to understand the effects of warming on plant physiological processes. Forest photosynthesis is the most important pathways of terrestrial carbon sequestration, yet continued warming could reduce this important carbon sink. Photosynthesis is highly sensitive to temperature and begins to decline after an optimum temperature (Topt) is reached, leading to reduced carbon uptake. To date, logistical difficulties have limited our ability to test photosynthetic responses to sustained warming in mature forest canopies. In order to understand how elevated temperatures will affect forest ecosystems, we need to be …
Development Of Gene-Based Microsatellite Markers In Acer Saccharum Marsh., Monica Harmon
Development Of Gene-Based Microsatellite Markers In Acer Saccharum Marsh., Monica Harmon
Dissertations, Master's Theses and Master's Reports
Sugar maple (Acer saccharum Marsh) is an important ecological and economic resource. Despite its significance, there are few molecular genetic resources available to date. This study used previously developed EST libraries generated for sugar maple and other hardwood species to develop and characterize EST-SSRs in sugar maple and test their transferability to other Acer species. Out of 58 markers tested, 22 showed amplification in the expected size range. From these, 16 polymorphic markers were selected to test transferability and 13 of these showed amplification in at least one other Acer species.