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A Model Of Carbon And Nitrogen Dynamics For Temperate Grasslands And Forests, Enrique Gomezdelcampo

Doctoral Dissertations

In the last two decades, the importance of hydrological processes for ecosystem dynamics and the effects of plants on hydrological processes has become increasingly apparent. A better understanding of the relationship between plant growth (carbon and nitrogen distribution) and the hydrological characteristics of a catchment would improve ecological assessments and management of forests and grasslands.

TOPDNDC, developed for this study, is a detailed, semi-distributed, quantitative, ecohydrological model for predicting carbon and nitrogen dynamics in small temperate catchments. TOPDNDC establishes an explicit linkage between the biogeochemical process and the hydrology of catchments using the well-known and tested biogeochemical model DNDC and …

Paleoecological Evidence Of Pre-Contact Human Impacts On Fire And Vegetation In Northern New York State, U.S.A., Roger William Brown

Doctoral Dissertations

The impacts of indigenous populations on fire and vegetation dynamics in North America prior to European contact are the subject of considerable debate. They have been overlooked by many researchers, but possibly given more emphasis than is due by others. Interpretations suffer from preconceptions regarding the nature of Native American activities and landscapes, shortages of paleoecological and archaeological data from key locations, and a tendency for researchers to not fully integrate available information. This study investigates the influence of pre-Contact inrugenous populations on fire and vegetation dynamics, using paleoecological evidence from lake sediment studies together with archaeological data.

A 2000-Year History Of Forest Disturbance In Southern Pacific Costa Rica: Pollen, Spore, And Charcoal Evidence From Laguna Santa Elena, Kevin John Anchukaitis

Masters Theses

Paleoecological records reveal information about past changes in vegetation composition and disturbance in tropical ecosystems. These environmental histories have direct bearing on modem ecological studies and the management of protected areas, and provide information about the interaction between prehistoric peoples and their environment. In this study, I reconstruct prehistoric and historic forest disturbance and vegetation change from southern Pacific Costa Rica, in the vicinity of the Las Cruces Biological Station and the La Amistad International Park and Biosphere Reserve. Pollen and charcoal in sediments from Laguna Santa Elena reveal a nearly continuous record of human alteration of these tropical forests …

Tcwp Newsletter No. 246, Tennessee Citizens For Wilderness Planning

Tennessee Citizens for Wilderness Planning Newsletters

No abstract provided.

A Field And Enclosure Study Of Population Dynamics And The Effects Of Density On Fecundity Of Anolis Carolinensis And Anolis Sagrei (Sauria: Polychrotidae) In Conspecific And Heterospecific Groups, Todd C. Vincent

Doctoral Dissertations

Populations of the lizard species Anolis carolinensis in Florida have declined with the spread of the invading Anolis sagrei. This phenomenon appears to be accentuated by habitat disturbance. I conducted an observational field study to investigate the population dynamics of the two species in undisturbed areas of Florida. The main objective of the study was to measure seasonal dynamics in the relative densities of juveniles and adults in allopatric and sympatric populations of the two species in these vegetationally complex habitats. The results of this study led me to design and conduct an outdoor enclosure experiment to investigate the possible …

Tcwp Newsletter No. 244, Tennessee Citizens For Wilderness Planning

Tennessee Citizens for Wilderness Planning Newsletters

No abstract provided.