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Full-Text Articles in Physical Sciences and Mathematics
Anthropogenic Impacts To Essential Habitats In The Gulf Of Maine: A Case Study Of The American Lobster, Homarus Americanus, And Its Fishery, Andrew Goode
Electronic Theses and Dissertations
The Gulf of Maine has been fundamentally altered by anthropogenic forcings for decades and offers an ideal study system to monitor response to change. Through complex interactions between ocean warming, altered demographic bottlenecks, and reduced top-down controls, the American lobster (Homarus americanus Milne Edwards) capitalized on favorable conditions and proliferated within the Gulf of Maine. These changes catalyzed the expansion of the lobster fishery, elevated its status as North America’s most valuable marine resource, and shifted coastal communities towards a virtual lobster monoculture. The same processes that facilitated lobster to capitalize on favorable conditions may come with unintended consequences …
Signs Of The Seasons Program Species In Focus: Monarchs And Milkweed, An Ecological Relationship Threatened By Climate Change, Beth Bisson, Esperanza Stancioff
Signs Of The Seasons Program Species In Focus: Monarchs And Milkweed, An Ecological Relationship Threatened By Climate Change, Beth Bisson, Esperanza Stancioff
Maine Sea Grant Publications
Over the past two decades, researchers have observed declines in populations of both monarch butterflies (over 70% in some areas) and milkweed. Climate-related factors contributing to these declines include increasing frequency of intense winter storms and near freezing temperatures in monarch overwintering areas in Mexico, and severe droughts in the southwestern and southeastern United States, which affect both species. If these trends continue, they could create a mismatch in time or space between monarch breeding cycles along their northward migration (April to August) and the growth and survival of milkweed plants eaten by monarch caterpillars.
Glaciochemical Investigations As A Tool In The Historical Delineation Of The Acid Precipitation Problem, William B. Lyons, Paul Andrew Mayewski
Glaciochemical Investigations As A Tool In The Historical Delineation Of The Acid Precipitation Problem, William B. Lyons, Paul Andrew Mayewski
Earth Science Faculty Scholarship
Precipitation in the Northern Hemisphere has been recently recognized to have hydrogen ion concentrations 10 to 100 times higher than expected for natural precipitation (Likens and Bormann 1974, Cogbill and Likens 1974, Lewis and Grant 1980). However, controversy has arisen regarding the nature of the acidity of the precipitation sampled and whether, indeed, the pH of North American precipitation has increased over time (Miller and Everett 1979, Lerman 1979, Stensland 1980, Sequeria 1981, Carlson and Rodhe 1982). In most locations pH records have been constructed rather imperfectly due to differences in sampling, handling, and analytical procedures used (Galloway and Likens …