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Full-Text Articles in Life Sciences
Foliage Type Controls Mercury Input, Storage, And Release In The Boreal Forest, Madelaine J R Anderson
Foliage Type Controls Mercury Input, Storage, And Release In The Boreal Forest, Madelaine J R Anderson
Electronic Thesis and Dissertation Repository
Mercury (Hg) is a naturally occurring element with a complex biogeochemical cycle. Forests act as net sinks for both carbon (C) and Hg as foliage accumulates Hg with time. Litterfall represents a main input of C and Hg into forest soils. My aim was to investigate how foliage type (coniferous, deciduous) governs the input of Hg into forests with a field-based study that measured Hg accumulation over a growing season, and then investigate the storage and release of Hg from foliar tissues into soil with a laboratory-based incubation experiment. Results from the field-based study demonstrate deciduous leaves have more linear …
Nutrient Cycling-Tree Species Relationships In Appalachian Forests, Philip Michael Crim
Nutrient Cycling-Tree Species Relationships In Appalachian Forests, Philip Michael Crim
Graduate Theses, Dissertations, and Problem Reports
Since the colonization of North America by Europeans, ecosystems in Appalachia and across the continent have been in a prolonged state of flux. Areas particularly rich in natural resources, such as Appalachia, have historically borne the brunt of these swift changes, often with devastating consequences. Downwind of much of the power generation facilities of the Ohio Valley, Appalachian forests have been geographically predisposed to high rates of acidic deposition, a circumstance mitigated by the passage of Clean Air Legislation beginning in the 1970s. Nevertheless, decades of elevated nitrogen (N) and sulfur (S) inputs had a profound impact on the ecology …