Publications
FORT scientists have produced more than 2000 peer reviewed publications that are registered in the USGS Publications Warehouse, along with many others prior to their work at the USGS or in conjunction with other government agencies.
Filter Total Items: 2437
Rapid assessment of butterfly diversity in a montane landscape Rapid assessment of butterfly diversity in a montane landscape
We present the results of a rapid assessment of butterfly diversity in the 754 ha Beaver Meadows study area in Rocky Mountain National Park, Larimer County, Colorado. We measured butterfly species richness and relative abundance as part of a landscape-scale investigation of diversity patterns involving several groups of organisms. A stratified random sampling design was used to include...
Authors
S.E. Simonson, P.A. Opler, T.J. Stohlgren, G.W. Chong
Anthropogenic nitrogen deposition induces rapid ecological changes in alpine lakes of Colorado Front Range (USA) Anthropogenic nitrogen deposition induces rapid ecological changes in alpine lakes of Colorado Front Range (USA)
Recent sediments from two alpine lakes (> 3300 m asl) in the Colorado Front Range (USA) register marked and near-synchronous changes that are believed to represent ecological responses to enhanced atmospheric deposition of fixed nitrogen from anthropogenic sources. Directional shifts in sediment proxies include greater representations of mesotrophic diatoms and increasingly depleted δ15N...
Authors
A.P. Wolfe, Jill Baron, R.J. Cornett
Effects of emergency haying on vegetative characteristics within selected Conservation Reserve Program fields in the Northern Great Plains Effects of emergency haying on vegetative characteristics within selected Conservation Reserve Program fields in the Northern Great Plains
Successional changes in vegetation composition within seeded grasslands may effect attainment of long term conservaation objectives. Comparisons between vegetation composition within Conservation Reserve Program (CRP) fields planted to cool season, introduced grasses hayed for emergency we, and non hayed fields of the same age and species composition were completed to determine potential...
Authors
A.W. Allen, B.S. Cade, M.W. Vandever
The status of the macroinvertebrate community in the St. Croix River, Minnesota and Wisconsin: An examination of ecological health using techniques of multivariate analysis The status of the macroinvertebrate community in the St. Croix River, Minnesota and Wisconsin: An examination of ecological health using techniques of multivariate analysis
A statistical procedure that integrates physical, chemical and biological data is used to operationally define and analyze ecological health. Benthic macroinvertebrates collected from May through September from eight locations along the St. Croix River in Minnesota and Wisconsin were analyzed by canonical correspondence analyses. A sequential multivariate analysis procedure was developed...
Authors
T.P. Boyle, M.S. Strand
Long-term ecosystem studies in Isle Royale, Olympic and Rocky Mountain National Parks; Noatak National Preserve, and Fraser Experimental Forest Long-term ecosystem studies in Isle Royale, Olympic and Rocky Mountain National Parks; Noatak National Preserve, and Fraser Experimental Forest
No abstract available.
Authors
R. Stottlemyer, Jill Baron, R. Edmonds, L. Scherbarth, H. Stelzer
A high validity census technique for herpetofaunal assemblages A high validity census technique for herpetofaunal assemblages
No abstract available.
Authors
G.H. Rodda, E.W. Campbell, T. H. Fritts
Whitebark pine decline: Infection, mortality and population trends Whitebark pine decline: Infection, mortality and population trends
No abstract available.
Authors
Katherine C. Kendall, Robert E. Keane
Estimates of shorebird populations in North America Estimates of shorebird populations in North America
Estimates are presented for the population sizes of 53 species of Nearctic shorebirds occurring regularly in North America, plus four species that breed occasionally. Population estimates range from a few tens to several millions. Overall, population estimates most commonly fall in the range of hundreds of thousands, particularly the low hundreds of thousands; estimated population sizes...
Authors
R. I. G. Morrison, Robert E. Gill, B. A. Harrington, S. K. Skagen, G. W. Page, C. L. Gratto-Trevor, S. M. Haig
Assessing ecosystem effects of reservoir operations using food web-energy transfer and water quality models Assessing ecosystem effects of reservoir operations using food web-energy transfer and water quality models
We investigated the effects on the reservoir food web of a new temperature control device (TCD) on the dam at Shasta Lake, California. We followed a linked modeling approach that used a specialized reservoir water quality model to forecast operation-induced changes in phytoplankton production. A food web–energy transfer model was also applied to propagate predicted changes in...
Authors
L. Saito, B. M. Johnson, J. Bartholow, R.B. Hanna
Roosting habits of four bat species in the Black Hills of South Dakota Roosting habits of four bat species in the Black Hills of South Dakota
The availability of suitable roosts influences the distribution and abundance of bats. Quantifying roosting requirements is a necessary step toward effectively monitoring, managing, and conserving bats. Our objectives were to locate and characterize the natural, daytime summer roosts of Myotis septentrionalis, M. thysanodes, M. volans, and Eptesicus fuscus in the Black Hills of South...
Authors
P.M. Cryan, M.A. Bogan, G.M. Yanega
Engelmann spruce nitrogen dynamics across a nitrogen deposition gradient in Colorado, USA Engelmann spruce nitrogen dynamics across a nitrogen deposition gradient in Colorado, USA
No abstract available.
Authors
H.M. Rueth, Jill Baron