Thesis Archives Search
This search engine will let you explore the over 1800 theses written in Honors at The University of Maine since the Program’s inception in 1935. You may search our thesis archives based on any of the fields listed above. If the thesis is available at the Reynolds Library (Thomson Honors Center) or Fogler Library (Special Collections), the information will appear below the bibliographic data. At last count, we had about 1800 theses in the Reynolds Library.
Search Results
A Floral Inventory of the Banks of the Penobscot River between Ayer’s Island and the Veazie Dam
A Four-Fold Plan to Insure the Continued Existence of the Broadcasting Department and Radio Station WMEB-FM
A Generating Transformation to Solve Difference Equations
A Genomics Based Approach to Investigate the Mouse Piebald Deletion Complex: Identifying Genes and Exploring Their Development Function
A Glimpse of Whimsy: Short Children’s Stories
Author:
Emma
Hutchinson
Major: English Graduation Year: 2019 Thesis Advisor: Chris Mares
Description of Publication:
Location of Publication:
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/512/
Major: English Graduation Year: 2019 Thesis Advisor: Chris Mares
Description of Publication:
Location of Publication:
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/512/
A GROWING TOWN: DEVELOPING A LOCAL FOOD SYSTEM IN ORONO, MAINE
A Heating Analysis on an Active/Passive Solar House in Greenbush, Maine
A HISTOLOGICAL ASSESSMENT OF THE EFFECTS OF ELEVATED TEMPERATURE AND NITROGEN ON THE SYMBIODINIUM OF PALYTHOA TOXICA (WALSH AND BOWERS 1971)
Author:
Molly
Westbrook
Major: Marine Sciences Graduation Year: 2018 Thesis Advisor: Ian Bricknell
Description of Publication:
Coral reefs around the world are suffering mass bleaching events caused by a combination of stressors, including rising ocean temperatures, acidity, pollution, increased suspended sediments, and increasing nitrogen levels. Corals harbor a complex microbial ecosystem consisting of bacteria, and algal symbionts known as Symbiodinium. This study examines the effects of elevated temperature, a known cause of bleaching, and elevated nitrogen, an increasingly important potential stressor for reefs, on the Symbiodinium of a zoanthid coral, Palythoa toxica. A total of 65 polyps were subjected to 5 different water treatments of 2 levels of elevated nitrogen, and 2 levels of elevated temperature in populations of 12. Samples were removed every four days and at the experiment’s termination. The samples were fixed for histological examination. Symbiodinium size was analyzed using Feret diameter. The results of this experiment confirm the effect of elevated temperature as a bleaching mechanism for P. toxica and provide evidence that elevated nitrate is a potential bleaching trigger in prolonged exposure. Furthermore, there is evidence that combined elevated nitrate and temperature compound bleaching mechanisms, with the highest amount of bleaching occurring in the most stressed treatments. When exposed to low levels of nitrate and low levels of temperature elevation, there is a trend of Symbiodinium Feret diameter increase. With time, however, there is an eventual collapse of the system, resulting in Symbiodinium Feret diameter decrease and an increase of algal mass potentially from cell lysis within bleached Symbiodinium colonies remaining between tentacles and within the coelenteron.
Location of Publication:
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/360
Major: Marine Sciences Graduation Year: 2018 Thesis Advisor: Ian Bricknell
Description of Publication:
Coral reefs around the world are suffering mass bleaching events caused by a combination of stressors, including rising ocean temperatures, acidity, pollution, increased suspended sediments, and increasing nitrogen levels. Corals harbor a complex microbial ecosystem consisting of bacteria, and algal symbionts known as Symbiodinium. This study examines the effects of elevated temperature, a known cause of bleaching, and elevated nitrogen, an increasingly important potential stressor for reefs, on the Symbiodinium of a zoanthid coral, Palythoa toxica. A total of 65 polyps were subjected to 5 different water treatments of 2 levels of elevated nitrogen, and 2 levels of elevated temperature in populations of 12. Samples were removed every four days and at the experiment’s termination. The samples were fixed for histological examination. Symbiodinium size was analyzed using Feret diameter. The results of this experiment confirm the effect of elevated temperature as a bleaching mechanism for P. toxica and provide evidence that elevated nitrate is a potential bleaching trigger in prolonged exposure. Furthermore, there is evidence that combined elevated nitrate and temperature compound bleaching mechanisms, with the highest amount of bleaching occurring in the most stressed treatments. When exposed to low levels of nitrate and low levels of temperature elevation, there is a trend of Symbiodinium Feret diameter increase. With time, however, there is an eventual collapse of the system, resulting in Symbiodinium Feret diameter decrease and an increase of algal mass potentially from cell lysis within bleached Symbiodinium colonies remaining between tentacles and within the coelenteron.
Location of Publication:
URL to Thesis: https://digitalcommons.library.umaine.edu/honors/360