| NSF Org: |
OPP Office of Polar Programs (OPP) |
| Recipient: |
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| Initial Amendment Date: | June 16, 2009 |
| Latest Amendment Date: | October 31, 2012 |
| Award Number: | 0902153 |
| Award Instrument: | Standard Grant |
| Program Manager: |
Neil R. Swanberg
OPP Office of Polar Programs (OPP) GEO Directorate for Geosciences |
| Start Date: | July 1, 2009 |
| End Date: | June 30, 2013 (Estimated) |
| Total Intended Award Amount: | $1,317,687.00 |
| Total Awarded Amount to Date: | $1,317,687.00 |
| Funds Obligated to Date: |
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| ARRA Amount: | $1,317,687.00 |
| History of Investigator: |
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| Recipient Sponsored Research Office: |
7 M B L ST WOODS HOLE MA US 02543-1015 (508)289-7243 |
| Sponsor Congressional District: |
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| Primary Place of Performance: |
7 M B L ST WOODS HOLE MA US 02543-1015 |
| Primary Place of
Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| Parent UEI: |
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| NSF Program(s): | ARCSS-Arctic System Science |
| Primary Program Source: |
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| Program Reference Code(s): |
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| Program Element Code(s): |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.078 |
ABSTRACT
Abstract
This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).
This research will determine how the shifting seasonality of arctic river hydrology alters key biotic linkages within and among lake and stream components of watersheds and may alter the function of the arctic system. Arctic grayling (Thymallus arcticus) is a quintessential, circumpolar arctic species that provides a model system for understanding the impacts of changing seasonality on arctic ecosystem function because an interconnected and varied landscape (large tundra rivers, small streams and lakes) is required to maintain their population viability. Changes to environmental conditions that disrupt their migration will affect the system-level function of aquatic ecosystems. Grayling serve as food for other biota, including lake trout, birds and humans, and as top-down controls in stream ecosystems suggesting that changes to their populations will have effects that reverberate throughout the coupled river-lake system. The scale and pace of the changes now impacting tundra lakes and streams imparts an urgency to understand how they are linked and how they function as a system.
This work will address 4 questions: 1) How are seasonality, rate and distance of grayling migration affected by climate change? 2) Are the seasonality of life-cycles, life-history and attributes of stream insect populations changing in response to climate change? 3) How does changing seasonality of river discharge interact with insect production to affect availability and transfer of stream production to grayling? 4) What is the effect of climate driven disruption of the migratory link on the structure and function of winter refugia?
Reseachers will examine the implications of changing climate on key biotic linkages by: 1) retrospective studies of long-term databases of stream flow and temperature and insect and fish productivity and migration, 2) new work on controls on seasonality of migration, stream productivity and trophic transfer and 3) new work on the feedbacks between changing open water season and food webs in winter refugia. This will be integrated into a systems-level model, using grayling as the ?currency?, to evaluate the effects of altered linkages among system components on system level functioning.
The broader intellectual merit of this project lies in the integration of work from diverse fields (hydrology, animal physiology, population biology and mathematical modeling) to understand the roles of species in ecosystems. Improved understanding of the interdependence of lake and stream productivity through biotic linkages will advance our general understanding of landscape ecology, the role of animals in ecosystem dynamics, life-history evolution and ecosystem management of fisheries.
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