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Year Published: 2009

Morphological characteristics and growth of northern pike in waters of the United States

No abstract available.

Kuzmenko, Y.G.; Spesyviy, T.B.; Bonar, Scott A.
Morphological characteristics and growth of northern pike in waters of the United States (in Ukrainian); 2009; Article; Journal; Fisheries; Kuzmenko, Y. G.; Spesyviy, T. B.; Bonar, Scott A.

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Year Published: 2009

An unusual northern cardinal nest: cooperative breeding or nesting sharing

No abstract available.

Leslie, David M.

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Year Published: 2009

Climate change adaptation for the US National Wildlife Refuge System

Since its establishment in 1903, the National Wildlife Refuge System (NWRS) has grown to 635 units and 37 Wetland Management Districts in the United States and its territories. These units provide the seasonal habitats necessary for migratory waterfowl and other species to complete their annual life cycles. Habitat conversion and fragmentation,...

Griffith, Brad; Scott, J. Michael; Adamcik, Robert S.; Ashe, Daniel; Czech, Brian; Fischman, Robert; Gonzalez, Patrick; Lawler, Joshua J.; McGuire, A. David; Pidgorna, Anna

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Year Published: 2009

Effects of commercial harvest on shovelnose sturgeon populations in the Upper Mississippi River

Shovelnose sturgeon Scaphirhynchus platorynchus have become an increasingly important commercial species in the upper Mississippi River (UMR) because of the collapse of foreign sturgeon (family Acipenseridae) populations and bans on imported caviar. In response to concerns about the sustainability of the commercial shovelnose sturgeon fishery in...

Koch, Jeff D.; Quist, Michael C.; Pierce, Clay L.; Hansen, Kirk A.; Steuck, Michael J.

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Year Published: 2009

Sensitivity of the carbon cycle in the Arctic to climate change

The recent warming in the Arctic is affecting a broad spectrum of physical, ecological, and human/cultural systems that may be irreversible on century time scales and have the potential to cause rapid changes in the earth system. The response of the carbon cycle of the Arctic to changes in climate is a major issue of global concern, yet there has...

McGuire, A. David; Anderson, Leif G.; Christensen, Torben R.; Dallimore, Scott; Guo, Laodong; Hayes, Daniel J.; Heimann, Martin; Lorenson, T.D.; Macdonald, Robie W.; Roulet, Nigel

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Year Published: 2009

Nitrogen attenuation of terrestrial carbon cycle response to global environmental factors

Nitrogen cycle dynamics have the capacity to attenuate the magnitude of global terrestrial carbon sinks and sources driven by CO2 fertilization and changes in climate. In this study, two versions of the terrestrial carbon and nitrogen cycle components of the Integrated Science Assessment Model (ISAM) are used to evaluate how variation in nitrogen...

Jain, A.A.; Yang, Xiaojuan; Kheshgi, H.; McGuire, A. David; Post, W.; Kicklighter, David W.

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Year Published: 2009

Projected changes in atmospheric heating due to changes in fire disturbance and the snow season in the western Arctic, 2003–2100

In high latitudes, changes in climate impact fire regimes and snow cover duration, altering the surface albedo and the heating of the regional atmosphere. In the western Arctic, under four scenarios of future climate change and future fire regimes (2003–2100), we examined changes in surface albedo and the related changes in regional...

Euskirchen, E.S.; McGuire, A. David; Rupp, T.S.; Chapin, F. S.; Walsh, J.E.

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Year Published: 2009

Paddlefish management, propagation, and conservation in the 21st century

Paukert, Craig P.; Scholten, George D.

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Year Published: 2009

Diverse elevational diversity gradients in Great Smoky Mountains National Park, U.S.A.: Chapter 10

Why does the number of species vary geographically? The earliest naturalists puzzled over this question, as do many biogeographers and macroecologists today. Over the last 200-plus years, the most striking geographic pattern in species richness – the decline in species richness with increasing latitude – has received the most attention. Thanks to...

Sanders, Nathan J.; Dunn, Robert R.; Fitzpatrick, Matthew C.; Carlton, Christopher E.; Pogue, Michael R.; Parker, Charles R.; Simons, Theodore R.

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Year Published: 2009

Sublethal effects of catch-and-release fishing: measuring capture stress, fish impairment, and predation risk using a condition index

The sublethal effects of simulated capture of red snapper (Lutjanus campechanus) were analysed using physiological responses, condition indexing, and performance variables. Simulated catch-and-release fishing included combinations of depth of capture and thermocline exposure reflective of environmental conditions experienced in the Gulf of Mexico...

Campbell, Matthew D.; Patino, Reynaldo; Tolan, J.M.; Strauss, R.E.; Diamond, S.
Campbell M. Sublethal effects of catch-and-release fishing: measuring capture stress, fish impairment, and predation risk using a condition index. ICES journal of marine science. 2010-04;67:513-521.

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Year Published: 2009

Distribution and habitat use of king rails in the Illinois and Upper Mississippi River valleys

The migratory population of the king rail (Rallus elegans) has declined dramatically during the past 40 years, emphasizing the need to identify habitat requirements of this species to help guide conservation efforts. To assess distribution and habitat use of king rails along the Illinois and Upper Mississippi valleys, USA, we conducted repeated...

Darrah, Abigail J.; Krementz, David G.
Darrah A. Distribution and Habitat Use of King Rails in the Illinois and Upper Mississippi River Valleys. The Journal of wildlife management. 2009-11;73:1380-1386.

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Year Published: 2009

Shifts in the trophic base of intermittent stream food webs

Understanding spatial and temporal variation in the trophic base of stream food webs is critical for predicting population and community stability, and ecosystem function. We used stable isotope ratios (13C/12C, and 15N/14N) to characterize the trophic base of two streams in the Ozark Mountains of northwest Arkansas, U.S.A. We predicted that...

Dekar, Matthew P.; Magoulick, Daniel D.; Huxel, G.R.
Dekar M. Shifts in the trophic base of intermittent stream food webs. Hydrobiologia. 2009-11;635:263-277.