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Full-Text Articles in Physical Sciences and Mathematics
Cmg Collaborative Research: Interactions Of Phytoplankton With Dissipative Vortices, Peter A. Jumars, Lee Karp-Boss
Cmg Collaborative Research: Interactions Of Phytoplankton With Dissipative Vortices, Peter A. Jumars, Lee Karp-Boss
University of Maine Office of Research Administration: Grant Reports
The aim of this project is to develop coordinated laboratory experiments and computational models to address a fundamental question in oceanography concerning magnitudes and mechanisms of turbulence effects on phytoplankton and other particles at the spatial scale of individual organisms. The importance of external energy in the form of turbulence in determining relative success of different kinds of phytoplankton dates to the seminal analysis of Munk and Riley (1952) and Margalef (1978). Margalef's "mandala" asserts that high nutrient concentrations and turbulence intensities favor dominance by diatoms, whereas low values favor non-red-tide dinoflagellates. Subsequent work has revealed a wide spectrum of …
Rapid: Assessing Tsunami Impacts On The Benthic Community Of Robinson Crusoe Island, Richard Wahle, Peter Petraitis
Rapid: Assessing Tsunami Impacts On The Benthic Community Of Robinson Crusoe Island, Richard Wahle, Peter Petraitis
University of Maine Office of Research Administration: Grant Reports
This RAPID project will assess the subtidal ecological impacts of the tsunami that struck Robinson Crusoe Island on 27 February 2010 with support from the Biological Oceanography Program and the Office of International Science and Engineering/Americas. It will take advantage of baseline data collected as part of an ongoing Chilean research project. Robinson Crusoe Island belongs to the Juan Fernandez archipelago, some 600 km west of the coast of Chile in the southeast Pacific. The island group is unique for its high level of marine and terrestrial endemism, including a fishery for the prized Robinson Crusoe Island lobster, Jasus frontalis. …
Collaborative Research: Interannual Variability Of Coastal Phytoplankton Blooms In The Gulf Of Maine And Their Relationships To Local And Remote Forcings, David W. Townsend
Collaborative Research: Interannual Variability Of Coastal Phytoplankton Blooms In The Gulf Of Maine And Their Relationships To Local And Remote Forcings, David W. Townsend
University of Maine Office of Research Administration: Grant Reports
The aim of this proposal is to explore the interaction of remote climate based forcing with local forcing to impact phytoplankton blooms in coastal and shelf regions with a coupled biological-physical model. Phytoplankton bloom dynamics are a classic example of biological-physical interactions in the ocean (Gran and Braarud, 1935; Sverdrup, 1953). Yet it is still a challenge to identify the dominant processes controlling the interannual variability of phytoplankton blooms in coastal and shelf seas where multiple-scale biological and physical processes interact. The unstructured-grid, finite-volume, coastal ocean model (FVCOM, built within the GLOBEC Georges Bank Program) bridges the multi-scale physical processes …
Emersion Stress In Intertidal Seaweeds: Role Of Active Oxygen, Ian R. Davison
Emersion Stress In Intertidal Seaweeds: Role Of Active Oxygen, Ian R. Davison
University of Maine Office of Research Administration: Grant Reports
The study will examine stress-tolerance in two major groups of perennial intertidal macroalgae, the red and brown seaweeds. The research will test the hypothesis that active oxygen is involved in emersion stress of intertidal seaweeds. Damage due to active oxygen will be determined in stress-tolerant and stress- susceptible species exposed to emersion stress by measuring the peroxidation of membrane lipids. Plants will be grown in laboratory culture under conditions that increase their ability to withstand emersion stress. If the research hypothesis is correct, increases in stress tolerance should be associated with increased levels of antioxidants and/or protective enzymes. The proposed …