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Full-Text Articles in Life Sciences

Rapid: Effect Of A Very Low Nao Event On The Abundance Of The Lipid-Rich Planktonic Copepod, Calanus Finmarchicus, In The Gulf Of Maine, Jeffrey Runge Aug 2014

Rapid: Effect Of A Very Low Nao Event On The Abundance Of The Lipid-Rich Planktonic Copepod, Calanus Finmarchicus, In The Gulf Of Maine, Jeffrey Runge

University of Maine Office of Research Administration: Grant Reports

Test the hypothesis that a distinctly lower abundance of the planktonic copepod, Calanus finmarchicus in the Gulf of Maine follows the occurrence of very negative winter phases of the North Atlantic Oscillation (NAO). In 2010, the station-based winter NAO index was -4.64, even more intense than the negative (-3.78) 1996 NAO winter index. If a two-year lagged relationship between very negative NAO winter indices and Calanus abundance in the Gulf of Maine is valid, cooler water from the Labrador Sea should replace Atlantic Temperate Slope Water in the GoM in 2012, inducing a major climatic ecosystem event on ...


Developing Tools To Evaluate Spawning & Fertilization Dynamics Of The Giant Sea Scallop — Phase Ii: Field Trials In Experimental Populations, Richard A. Wahle, Peter Jumars Aug 2014

Developing Tools To Evaluate Spawning & Fertilization Dynamics Of The Giant Sea Scallop — Phase Ii: Field Trials In Experimental Populations, Richard A. Wahle, Peter Jumars

University of Maine Office of Research Administration: Grant Reports

Objective 1 — Sperm advection-diffusion model: Develop a two-dimensional spatial model to predict the concentration o f sperm and effective range of fertilization in a sperm plume at varying distances from a source population of spawning males under scenarios of synchronous and asynchronous spawning.

Objective 2 — Fertilization assays in field populations: Conduct a time series of fertilization assays over experimental populations of scallops to (a) further develop the methodology to assess ambient sperm loads in scallop populations over the course of the spawning season, (b) compare model predictions about spatial patterns of sperm concentration and fertilization generated in Objective 1 to ...


Understanding Copepod Life-History And Diversity Using A Next-Generation Zooplankton Model, Andrew J. Pershing, Frederic Maps, Nicholas R. Record Jul 2014

Understanding Copepod Life-History And Diversity Using A Next-Generation Zooplankton Model, Andrew J. Pershing, Frederic Maps, Nicholas R. Record

University of Maine Office of Research Administration: Grant Reports

The main goal of our project is to understand the patterns of diversity and biogeography in marine copepods. To achieve this goal, we developed a unique modeling framework to simulate the trade-offs between growth, development, and fecundity in marine copepods.

We developed a new approach to modeling growth and development in metazoans. We applied this approach to marine copepods, and used it to understand relationships between copepod body size and temperature, copepod biodiversity patterns, and copepod biogeography. This project also provided support for experiments to look at how copepod body size impacts the particle size spectrum.

We used our model ...


Collaborative Research: Interactive Effects Of Chronic N Deposition, Acidification, And Phosphorus Limitation On Coupled Element Cycling In Streams, Kevin S. Simon, Ivan J. Fernandez, Stephen Norton Jul 2014

Collaborative Research: Interactive Effects Of Chronic N Deposition, Acidification, And Phosphorus Limitation On Coupled Element Cycling In Streams, Kevin S. Simon, Ivan J. Fernandez, Stephen Norton

University of Maine Office of Research Administration: Grant Reports

Human activity has doubled the amount of nitrogen on the landscape, creating a pollution problem and changing the balance among multiple nutrients that limit biological activity in ecosystems. At the same time, other disturbances, such as acidification, interact with nitrogen enrichment in ways that strongly influence the productivity and health of terrestrial and aquatic ecosystems. This project examines the interactions among multiple elements and disturbances (nitrogen, phosphorus, metals, and acidification) along a continuum from the atmosphere through soils to streams. This project takes advantage of two unique experiments in which entire watersheds have been experimentally enriched with nitrogen and acid ...


Rcn: Diadromous Species Restoration Research Network (Dsrrn), David Hart, Adria A. Elskus, Peter D. Vaux, Karen A. Wilson Jul 2014

Rcn: Diadromous Species Restoration Research Network (Dsrrn), David Hart, Adria A. Elskus, Peter D. Vaux, Karen A. Wilson

University of Maine Office of Research Administration: Grant Reports

The primary goal of the Diadromous Species Restoration Research Network (DSRRN) was to advance the science of diadromous fish restoration, promote state-of-the-art scientific approaches to multiple-species restoration on a watershed scale, and facilitate interactions among scientists, managers, and stakeholders throughout the North Atlantic region.

This goal was achieved by a series of conferences and workshops over a five-year period between 2008 and 2013. In all, DSRRN organized two multi-day conferences with over 160 participants in attendance and five multiday workshops with an average of 25 participants. The objective of these workshops was to produce new directions for restoration science by ...


Conserving Maine's Unique Natural Resource: Monitoring, Outreach, And Education On Our Sand Beaches, Kristen Grant Apr 2014

Conserving Maine's Unique Natural Resource: Monitoring, Outreach, And Education On Our Sand Beaches, Kristen Grant

University of Maine Office of Research Administration: Grant Reports

Objective I: Provide comprehensive volunteer monitoring of southern Maine beaches to improve state and municipal access to the quality-controlled beach elevation data, on a monthly and pre/post storm basis.

Objective II: Strengthen partnerships among beach profile monitoring stakeholders

Objective III: Expand teaching and learning opportunities for beach stakeholders by facilitating presentations by a range of new perspectives to constituents at the 2013 Maine Beaches Conference.

Objective IV: Publish and disseminate new and expanded data in the Maine Geological Survey’s biannual State o f Maine’s Beaches reports in 2013 and 2015.


Functional Diversity Of Subsurface Deposit Feeders, Peter Jumars, Sara M. Lindsay Jan 2014

Functional Diversity Of Subsurface Deposit Feeders, Peter Jumars, Sara M. Lindsay

University of Maine Office of Research Administration: Grant Reports

Benthic community composition is changing at an alarming rate in many coastal regions. At the extreme of macrofaunal change, "dead zones" are growing in number, frequency and extent. Ecological extinction is occurring in many localities before the functional roles of the lost species are understood even crudely. Subsurface deposit feeders dominate particulate bioturbation and control the burial of organic matter, the primary process by which carbon is removed globally from contact with the biosphere and locked away for geological time. Very little is known, however, regarding the mechanics, spatial geometry and selectivity of their food acquisition and their mechanisms of ...