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Soluble carbohydrate content of shoots of Arctic wetland plants that are consumed by lesser snow geese 

Jefferies, Robert L.; Edwards, Kate A. (NRC Research Press, 2008)
We recorded seasonal changes in the total amounts of soluble carbohydrates in shoots of salt- and fresh-water coastal plants at La Pérouse Bay, northern Manitoba, to determine whether adult snow geese and their goslings ...
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Goose-induced Changes in Vegetation and Land Cover between 1976 and 1997 in an Arctic Coastal Marsh 

Abraham, Kenneth F.; Jefferies, Robert L.; Rockwell, Robert F. (Institute of Arctic and Alpine Research (INSTAAR), University of Colorado, 2005)
Since the 1970s, a breeding colony of lesser snow geese (Chen caerulescens caerulescens L.) at La Pérouse Bay, Manitoba, has grown 8% annually. This increase has led to significant loss of plant cover in all major salt- ...
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Genetic variation within and between populations of the asexual plant Puccinellia x phryganodes 

Jefferies, Robert L.; Gottlieb, Leslie D. (07/04/2013)
Puccinellia x phryganodes (Trin.) Scriber and Merr is widely distributed in Arctic salt marshes. In North America the species, which is capable of extensive clonal growth, appears to be a sterile triploid (2n = 21) ; seed ...
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Soil microbial and nutrient dynamics in a wet Arctic sedge meadow in late winter and early spring 

Edwards, Kate A.; McCulloch, Jennifer; Kershaw, Peter G.; Jefferies, Robert L. (Elsevier, 2006)
Microbial activity is known to continue during the winter months in cold alpine and Arctic soils often resulting in high microbial biomass. Complex soil nutrient dynamics characterize the transition when soil temperatures ...
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Taxonomic status of diploid Salicornai europaea (s.L.) (Chenopodiaceae) in northeastern North America. 

Wolff, S.L.; Jefferies, Robert L. (01/03/2013)
The taxonomic status of diploid Salicornia europaea L. (s.1.) in northeastern North America has been evaluated based on morphological and electrophoretic variation within and between populations. Populations of two European ...
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Nutrient Allocation Strategies to Eggs by Lesser Snow Geese (Chen caerulescens) at a Sub-Arctic Colony 

Hobson, Keith A.; Sharp, Christopher M.; Jefferies, Robert L.; Rockwell, Robert F.; Abraham, Kenneth F. (University of California Press, Jan-11)
The relative allocation of endogenous- and exogenous-derived nutrients to reproductive investment in Arctic-nesting geese is affected by body size, migration distance, and proximate conditions on the wintering, staging, and ...
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Allochthonous inputs: integrating population changes and food-web dynamics 

Jefferies, Robert L. (Elsevier, 2004)
Most ecosystems are recipients of allochthonous materials that enhance in situ productivity. Recent theoretical and empirical studies suggest that low to moderate inputs can stabilize food webs. However, depending on the ...
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Robert Lenthall Jefferies Scholarship 

Jefferies, Robert L. (2010)
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Robert L Jefferies Virtual Issue 

Jefferies, Robert L. (12/11/2012)
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Seasonal partitioning of resource use and constraints on the growth of soil microbes and a forage grass in a grazed Arctic salt-marsh 

Hargreaves, Sarah K.; Horrigan, Emma J.; Jefferies, Robert L. (Springer Verlag, 2009)
Seasonal growth responses of plants and soil microorganisms to additions of nitrogen (N), phosphorus (P) and carbon (C) were examined in goose-grazed and exclosed plots in an Arctic salt marsh. Plants showed strong growth ...
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Jefferies, Robert L. (15)
Abraham, Kenneth F. (3)Edwards, Kate A. (3)Rockwell, Robert F. (2)Bazely, Dawn R. (1)Cooke, Fred (1)Dainty, Jack (1)Gottlieb, Leslie D. (1)Hargreaves, Sarah K. (1)Harvey, Harold (1)... View MoreSubjectHudson Bay (4)Hudson Bay coast (2)La Pérouse Bay (2)Robert L. Jefferies (2)agricultural resources (1)Arctic Canada (1)Arctic fresh-water marshes (1)Arctic salt-water marshes (1)Arctic Tundra (1)biomass (1)... View MoreDate Issued2010 - 2013 (7)2000 - 2009 (6)1983 - 1989 (1)Has File(s)Yes (15)

All items in the YorkSpace institutional repository are protected by copyright, with all rights reserved except where explicitly noted.

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