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Projecting regions of North Atlantic right whale, Eubalaena glacialis, habitat suitability in the Gulf of Maine in 2050
No full textNorth Atlantic right whales (Eubalaena glacialis) are endangered. Understanding the role environmental conditions play in habitat suitability is key to determining the regions in need of protection for conservation of the species, particularly as climate change shifts suitable habitat. This thesis uses three species distribution modeling algorithms, together with historical data on whale abundance(1993 to 2009) and environmental covariates to build monthly ensemble models of past E. glacialis habitat suitability in the Gulf of Maine. Then, the models are projected onto the year 2050 for a range of climate scenarios. Specifically, the distribution of the species was modeled using generalized additive models, boosted regression trees, and artificial neural networks, and the environmental covariates included sea surface temperature, bottom water temperature, bathymetry, a modeled Calanus finmarchicus habitat index, and chlorophyll. The 2050 projections used downscaled climate anomaly fields from RCP 4.5 and 8.5. The relative contribution of each covariate changed seasonally, with an increase in the importance of bottom temperature and C. finmarchicus in the summer when model performance was highest. Additionally, there was a negative correlation between model performance and sea surface temperature. The 2050 projections indicated decreased habitat suitability across the Gulf of Maine during the months assessed, with the exception of narrow bands of suitability along the Scotian Shelf in August, September, and October. The results suggest that regions outside of the current areas of conservation focus may become increasingly important habitats for E. glacialis under future climate scenarios
The Colby Echo (September 17, 2020)
Get PDFPublished by the students of Colby College since 1877, The Colby Echo is the weekly, editorially independent student-run newspaper of Colby College in Waterville, Maine. Published monthly, 1877-1886; semi-monthly, 1886-1897; and weekly, during the academic year, 1898-present
Balancing Act: Corrie Marinaro \u2700 builds a thriving naturopathic practice in Waterville.
Get PDFThe self-care piece has been an evolving challenge, for sure. I sort of look at myself as an experiment in my medicine. -Dr. Corrie Marinaro \u270
Essay: The Miracle Mules
Get PDFIn Lake Placid, the Mules proved they deserved the national spotlight and made their College alumni proud
The Right Path: Pandit Mami \u2714 and friends make school possible once again for children in Freetown, Sierra Leone
Get PDFYou have to explain to them that in the long run this kid is going to be more helpful to you if they\u27re in school than they are selling food in the streets of Freetown. -Pandit Mami \u271
