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- Ascophyllum nodosum harvesting (1)
- Black tern Maine Food habits (1)
- Black tern Maine Habitat (1)
- Dioxins Environmental aspects (1)
- Harbor seal Maine (1)
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- Harbor seal ecology (1)
- Harbor seal habitat (1)
- Harbor seal paturation grounds (1)
- Hazardous wastes Maine (1)
- Land use urban (1)
- Mammal populations Maine (1)
- Paper products recycling (1)
- Pollution Maine (1)
- Rockweed (1)
- Stream ecology (1)
- Wild turkey Connecticut (1)
- Wild turkey Habitat (1)
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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Effects Of An Increasing Harbor Seal Population On Changes In Sites Used For Pupping, Nikolina Guldager
Effects Of An Increasing Harbor Seal Population On Changes In Sites Used For Pupping, Nikolina Guldager
Electronic Theses and Dissertations
Aerial survey data from 198 1 to 1997 of an increasing harbor seal (Phoca vitulina concolor) population in Penobscot and Blue Hill bays, Maine, were used to evaluate spatial and temporal patterns of use of pupping sites by mother-pup pairs. Pupping sites refer to haul-out sites where pups were observed during surveys, and are assumed to be used consistently from birth to weaning. Sites with pups were spatially clustered to remove spatial auto-correlation, reduce temporal variability and provide biologically cohesive and independent sample units. Spatial, temporal and habitat analyses were completed for 2 spatial scales: individual sites and …
Variables Influencing Nest Success Of Eastern Wild Turkeys In Connecticut: Nesting Habitat, Home Range-Scale Fragmentation, And Nest Attentiveness, Shelley M. Spohr
Variables Influencing Nest Success Of Eastern Wild Turkeys In Connecticut: Nesting Habitat, Home Range-Scale Fragmentation, And Nest Attentiveness, Shelley M. Spohr
Electronic Theses and Dissertations
Nest success is the most important demographic parameter influencing rates of population change of eastern wild turkeys (Meleagris gallopavo si1vestris) and many variables operating at multiple spatial and temporal scales may influence whether a nest is successful. Most studies of nest success and survival of turkeys have occurred in forested or agricultural landscapes; variables influencing nest success have not been studied in suburban landscapes. My objectives were to: 1 ) quantify survival and reproductive parameters of eastern wild turkey hens in the suburban environment of southeastern Connecticut and compare results to studies conducted in other northeastern states; 2) …
Monitoring Dioxin Levels In Maine Rivers With Semipermeable Membrane Devices, Heather A. Shoven
Monitoring Dioxin Levels In Maine Rivers With Semipermeable Membrane Devices, Heather A. Shoven
Electronic Theses and Dissertations
The Maine Department of Environmental Protection (DEP) currently monitors river dioxin levels through the sampling and destructive analysis of fish. Recent state law mandates that by December 31, 2002, the dioxin concentrations in fish downstream of a bleached Kraft pulp and paper mill are not to exceed the concentrations in fish upstream of the mill (38 M.R.S.A. §420-A). The objective of this thesis project was to develop an alternate method for determining Kraft mill compliance to this Dioxin law. This new method that uses semipermeable membrane devices (SPMDs) circumvents many of the concerns generated by the upstream-downstream fish test. An …
The Response Of First And Second Order Streams To Urban Land-Use In Maine, U.S.A., Chandler Morse
The Response Of First And Second Order Streams To Urban Land-Use In Maine, U.S.A., Chandler Morse
Electronic Theses and Dissertations
Physical, chemical, and biological characteristics of streams draining 20 catchments in Maine, U.S.A were compared to determine the influence of increasing urban intensity on stream ecosystem structure. The catchments had varying levels of urban land-use (percentage of the total impervious area within the catchment) ranging from 1-31%. Stream habitat quality, stability, and water quality consistently decreased as the proportion of impervious surface area increased within the catchment. .Indices based on stream benthic macroinvertebrate communities showed even stronger declines as a function of increasing impervious area in the study catchments. Streams draining catchments with levels of impervious surfaces <6% had higher levels of both total and Ephemeroptera + Plecoptera + Trichoptera (EPT) taxonomic richness. With increased levels of urban intensity, benthic macroinvertebrate communities in streams were characterized by decreased numbers of sensitive taxa. Taxa considered to be moderately sensitive to anthropogenic stress (e.g. Acerpenna (Ephemeroptera), Paracapnia …
Ecological Implications Of Rockweed, Ascophyllum Nodosum (L.) Le Jolis, Harvesting, Jill C. Fegley
Ecological Implications Of Rockweed, Ascophyllum Nodosum (L.) Le Jolis, Harvesting, Jill C. Fegley
Electronic Theses and Dissertations
Harvesting of natural resources usually entails substantial removal of the target species. Where such species are dominant members of natural communities, their removal can have important consequences for their own regeneration as well as for the species assemblages associated with them. Rockweed is an ecologically and commercially important intertidal alga in the North Atlantic, and is increasingly being harvested in Maine. The effects of harvesting on regrowth are well known but little is known about its effects on the species that use this alga as habitat. This research focused on the ecological implications of A. nodosum harvesting on the associated …
The Foraging And Habitat Ecology Of Black Terns In Maine, Andrew Gilbert
The Foraging And Habitat Ecology Of Black Terns In Maine, Andrew Gilbert
Electronic Theses and Dissertations
The population of Black Terns in Maine is small and factors related to the ecology of this species’ foraging and habitat ecology might limit population growth and recovery. The objectives were to (1) determine if diet and provisioning rates are limiting chick growth, (2) identify and rank suitable habitat in Maine, and (3) determine if precipitation patterns and water level dynamics are limiting in Maine. I compared growth rates of chicks in 1998-2000 in Maine to rates from other studies, determined the influence of colony, year, and diet on growth rates and food deliveries and used an energetics model to …
The Chemical Mechanism Of A Brown-Rot Decay Mimtic System And Its Application In Paper Recycling Processes, Yuhui Qian
The Chemical Mechanism Of A Brown-Rot Decay Mimtic System And Its Application In Paper Recycling Processes, Yuhui Qian
Electronic Theses and Dissertations
This work is aimed at improving our current knowledge of the non-enzymatic inecl~anisins involved in brown-rot decay, as well as the exploration of potential applications of a brown-rot mimetic model system in paper recycling processes. The study was divided into two parts. The first part focussed on the chemical mechanisms involved in chelation and reduction of iron by a low molecular weight chelator (isolated from the brown-rot fungus Gloeophyllz~m tmbeum) and its model compound 2,3- dihydroxybenzoic acid (2,3-DHBA). Chelation as well as free radical generation mediated by this system were studied by ESR measurement. The results indicate that the effects …