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Year Published: 2010

Headwater streams and forest management: does ecoregional context influence logging effects on benthic communities?

Effects of forest management on stream communities have been widely documented, but the role that climate plays in the disturbance outcomes is not understood. In order to determine whether the effect of disturbance from forest management on headwater stream communities varies by climate, we evaluated benthic macroinvertebrate communities in 24...

Medhurst, R. Bruce; Wipfli, Mark S.; Binckley, Chris; Polivka, Karl; Hessburg, Paul F.; Salter, R. Brion
Headwater streams and forest management: Does ecoregional context influence logging effects on benthic communities?; 2010; Article; Journal; Hydrobiologia; Medhurst, R. B.; Wipfli, M. S.; Binckley, C.; Polivka, K.; Hessburg, P. F.; Salter, R. B.

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Year Published: 2010

Identification of marine-derived lipids in juvenile coho salmon and aquatic insects through fatty acid analysis

The energetic benefits enjoyed by consumers in streams with salmon runs depend on how those benefits are accrued. Adult Pacific salmon Oncorhynchus spp. deliver significant amounts of nutrients (i.e., nitrogen and phosphorus) and carbon to streams when they spawn and die; these nutrient additions can have demonstrable effects on primary...

Heintz, Ron A.; Wipfli, Mark S.; Hudson, John P.

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Year Published: 2010

Linking ecosystems, food webs, and fish production: subsidies in salmonid watersheds

Physical characteristics of riverine habitats, such as large wood abundance, pool geometry and abundance, riparian vegetation cover, and surface flow conditions, have traditionally been thought to constrain fish production in these ecosystems. Conversely, the role of food resources (quantity and quality) in controlling fish production has received...

Wipfli, Mark S.; Baxter, Colden V.
Linking ecosystems, food webs, and fish production: Subsidies in salmonid watersheds; 2010; Article; Journal; Fisheries; Wipfli, M. S.; Baxter, C. V.

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Year Published: 2010

Maintenance of Eastern hemlock forests: Factors associated with hemlock vulnerability to hemlock woolly adelgid

Eastern hemlock (Tsuga canadensis [L.]) is the most shade-tolerant and long-lived tree species in eastern North America. The hemlock woolly adelgid (Adelges tsugae) (HWA), is a nonnative invasive insect that feeds on eastern hemlock and Carolina hemlock (Tsuga caroliniana Engelm.). HWA currently is established in 17 eastern states and is causing...

Fajvan, Mary Ann; Wood, Petra Bohall
Fajvan, M.A. and P. B. Wood. 2010. Maintenance of eastern hemlock forests: factors associated with hemlock vulnerability. Pp 31-38 in Rentch, J. S. and T.M. Schuler, eds. 2010. Proceedings from the conference on ecology and management of high-elevation forests in the central and southern Appalachian Mountains. USDA Forest Service, General Technical Report NRS-P-64. 250 p.

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Year Published: 2010

Migration patterns and movements of sandhill cranes wintering in central and southwestern Louisiana

In this study we trapped wintering sandhill cranes (Grus canadensis) in Louisiana and fitted them with satellite transmitters to determine their migration routes. Four of the 6 sandhill cranes with validated locations and a terminus point used the Central Flyway for spring migration; 2 of these 4 (the only 2 for which we have data) also used the...

Hartup, Barry K.; King, Sammy L.; Pierce, Aaron R.; Hersey, Kent R.; Winstead, Nicholas

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Year Published: 2010

Migratory urge and gll Na+,K+-ATPase activity of hatchery-reared Atlantic salmon smolts from the Dennys and Penobscot River stocks, Maine

Hatchery-reared Atlantic salmon Salmo salar smolts produced from captive-reared Dennys River and sea-run Penobscot River broodstock are released into their source rivers in Maine. The adult return rate of Dennys smolts is comparatively low, and disparity in smolt quality between stocks resulting from genetic or broodstock rearing effects...

Spencer, Randall C.; Zydlewski, Joseph D.; Zydlewski, Gayle B.

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Year Published: 2010

Nest and chick survival and colony-site dynamics of least terns in the U.S. Virgin Islands

We report nest and chick survival and colony-site dynamics of the Least Tern (Sternula antillarum). These results are the first for the Caribbean and were derived with likelihood-based approaches from 4640 nests and 44 chicks fitted with transmitters monitored in 52 colonies at St. Croix, U.S. Virgin Islands, 2003–2006. Managed colonies...

Lombard, Claudia D.; Collazo, Jaime; McNair, Douglas B.
Nest and chick survival and colony-site dynamics of least terns in the U.S. Virgin Islands; 2010; Article; Journal; Condor; Lombard, C. D.; Collazo, J. A.; McNair, D. B.

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Year Published: 2010

No evidence of trophic mismatch for caribou in Greenland

No abstract available.

Griffith, Dennis B.; Adams, Layne G.; Douglas, David C.; Cuyler, Christine; White, Robert G.; Gunn, Anne; Russell, Donald E.; Cameron, Raymond D.

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Year Published: 2010

Recovery of sediment characteristics in moraine, headwater streams of Northern Minnesota after forest harvest

We investigated the recovery of sediment characteristics in four moraine, headwater streams in north-central Minnesota after forest harvest. We examined changes in fine sediment levels from 1997 (preharvest) to 2007 (10 years postharvest) at study plots with upland clear felling and riparian thinning, using canopy cover, proportion of...

Merten, Eric C.; Hemstad, Nathaniel A.; Kolka, Randall K.; Newman, Raymond M.; Verry, Elon S.; Vondracek, Bruce C.
Recovery of sediment characteristics in moraine, headwater streams of Northern Minnesota after forest harvest; 2010; Article; Journal; Journal of the American Water Resources Association; Merten, E. C.; Hemstad, N. A.; Kolka, R. K.; Newman, R. M.; Verry, E. S.; Vondracek, B.

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Year Published: 2010

Red-shouldered hawk nesting habitat preference in south Texas

We examined nesting habitat preference by red-shouldered hawks Buteo lineatus using conditional logistic regression on characteristics measured at 27 occupied nest sites and 68 unused sites in 2005–2009 in south Texas. We measured vegetation characteristics of individual trees (nest trees and unused trees) and corresponding 0.04-ha...

Strobel, Bradley N.; Boal, Clint W.
Strobel B. Red-Shouldered Hawk Nesting Habitat Preference in South Texas. Journal of fish and wildlife management. 2010-06;1:33-37.

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Year Published: 2010

Relations between fish abundances, summer temperatures, and forest harvest in a northern Minnesota stream system from 1997 to 2007

Short-term effects of forest harvest on fish habitat have been well documented, including sediment inputs, leaf litter reductions, and stream warming. However, few studies have considered changes in local climate when examining postlogging changes in fish communities. To address this need, we examined fish abundances between 1997 and 2007 in a...

Merten, Eric C.; Hemstad, Nathaniel A.; Eggert, S.L.; Johnson, L.B.; Kolka, Randall K.; Newman, Raymond M.; Vondracek, Bruce C.
Relations between fish abundances, summer temperatures, and forest harvest in a northern Minnesota stream system from 1997 to 2007; 2010; Article; Journal; Ecology of Freshwater Fish; Merten, E. C.; Hemstad, N. A.; Eggert, S. L.; Johnson, L. B.; Kolka, R. K.; Newman, R. M.; Vondracek, B.

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Year Published: 2010

Response of aquatic macrophytes to human land use perturbations in the watersheds of Wisconsin lakes, U.S.A.

Aquatic macrophyte communities were assessed in 53 lakes in Wisconsin, U.S.A. along environmental and land use development gradients to determine effects human land use perturbations have on aquatic macrophytes at the watershed and riparian development scales. Species richness and relative frequency were surveyed in lakes from two ecoregions: the...

Sass, Laura L.; Bozek, Michael A.; Hauxwell, Jennifer A.; Wagner, Kelly; Knight, Susan
Response of aquatic macrophytes to human land use perturbations in the watersheds of Wisconsin lakes, U.S.A.; 2010; Article; Journal; Aquatic Botany; Sass, L. L.; Bozek, M. A.; Hauxwell, J. A.; Wagner, K.; Knight, S.