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Full-Text Articles in Life Sciences
Leaf Area, Stemwood Volume Growth, And Stand Structure In A Mixed-Species, Multi-Aged Northern Conifer Forest, Laura Kenefic
Leaf Area, Stemwood Volume Growth, And Stand Structure In A Mixed-Species, Multi-Aged Northern Conifer Forest, Laura Kenefic
Electronic Theses and Dissertations
Tree- and stand-level leaf area (LA) - stemwood volume growth relationships were explored in mixed-species, multi-aged northern conifer stands dominated by Tsuga canadensis (L.) Carr. (eastern hemlock), Abies balsameu (L.) Mill. (balsam fir), and Piceu rubens Sarg. (red spruce). A T. cunudensis LA model was developed to supplement published equations for A. bulsumeu and P. rubens. Sapwood area was an effective T. cunudensis LA surrogate, though nonsapwood-based models using stem cross-sectional area and modified live crown ratio produced results comparable to sapwood-based models. Equations for predicting tree-level stemwood volume increment (AVINC) were derived, and implied growth efficiencies (GE) were …
Factors Influencing Net Primary Production In Red Spruce, Michael Day
Factors Influencing Net Primary Production In Red Spruce, Michael Day
Electronic Theses and Dissertations
Management of forest resources, even when practiced at the scale of ecosystems, is implicitly based on managing photosynthetic acquisition of carbon by trees. This thesis examines several aspects of carbon balance at the scale of individual trees, using red spruce (Picea rubens Sarg.) as a model species. Age-related declines in net primary productivity have been described for many species, including red spruce. A potential explanation is that ontogenetic changes in meristems lead to lower photosynthetic rates, which was confirmed here for red spruce. A grafting study used scions from juvenile, 6Oy, and 120~ trees to demonstrate that age-related morphological …