Sage grouse on the Yakima Training Center: A summary of studies conducted during 1989 and 1990

Eberhardt, L.E.; Hofmann, Lulu

doi:10.2172/6029071

Cited by 2 publications

(19 citation statements)

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“…For 1991, 13 grouse (8 males and 5 females) captured in winter were monitored in addition to 6 females captured in 1990 that continued to carry operating transmitters (Eberhardt and Hofmann, 1991). A greater trapping effort in 1992 resulted in 45 birds, all females, being captured and fitted "…”

Section: Resultsmentioning

confidence: 99%

“…iii Introduction This report summarizes and discusses results obtained from the Yakima Training Center (YTC) sage grouse study during 1991 and1992. Pacific Northwest Laboratory(,) conducted the study for the U.S. Department of the Army to provide basic ecological information on YTC sage grouse, a technical basis for sage grouse management decisions, and, if warranted, related training restrictions • that could be implemented to further protect sage grouse and their critical habitats.…”

Section: Discussionmentioning

confidence: 99%

“…This report summarizes study results from 1991 and 1992 on the ecology, habitat preferences, and responses of sage grouse to troop training activity on the YTC. The 1991 field study was conducted as an extension of the work reported by Eberhardt and Hofmann (1991). In 1992, a 2-year study was initiated on the breeding ecology of sage grouse on the YTC.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, since sage grouse on the YTC often make lengthy, erratic movements, which made relocating them from the ground very difficult, a fixed-wing aircraft was used as weather and air-space access permitted to locate birds that could not be relocated from the ground. Eberhardt and Hofmann (1991) described the methods for obtaining grouse locations from the towers and the procedures used for aerial radio-tracking.…”

Section: Monitoring Movementsmentioning

confidence: 99%

“…Lek counts on the YTC have been conducted for a number of years to monitor breeding season numbers of male sage grouse. Eberhardt and Hofmann (1991) summarized past lek count data and provided data for 1989 and 1990. We continued the lek counts in 1991 and 1992 using the methods described by Eberhardt and Hofmann (1991).…”

Section: Counts and Population Estimatesmentioning

confidence: 99%

See 4 more Smart Citations

Sage grouse on the Yakima Training Center: A summary of studies conducted during 1991 and 1992

Cadwell¹,

Simmons²,

Downs³

et al. 1994

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Monitoring Movementsmentioning

confidence: 99%

Section: Counts and Population Estimatesmentioning

confidence: 99%

See 3 more Smart Citations

Sage grouse on the Yakima Training Center: A summary of studies conducted during 1991 and 1992

Cadwell¹,

Simmons²,

Downs³

et al. 1994

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Vegetation survey of knapweed on the Yakima Training Center - 1992

Downs¹,

Cadoret²,

Rickard³

1994

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This report summarizes and discusses the results of a vegetation survey conducted in 1992 on a portion of the YakimaTrainingCenter (YI"C). PacificNorthwestLaboratory(PNL) conductedthis surveyand a similarsurveyin 1991 for the U.S. Departmentof the Army. The objectivesof the surveywereto evaluatethe impactof the herbicidepicloramon forbs where aerial applicationsof picloramweremade in 1988, 1989, and i991 to controlknapweed (Centaureaspp.) infestations.Forbsare of specialinterestbecausethey are an importantpart of the springand summerdiet of the westernsage grouse(Centrocercus urophasianus phaios), whichis a U.S. Fish and WildlifeServicecandidatespeciesfor the threatenedand endangered list. We also conducteda limitedevaluationof the effectiveness ofthe spray programin controllingthe spreadof knapweed. This documentisa companiondocumentto the report detailingresultsof the vegetationsurveysconductedin 1991 (Eberhardtet al. 1992). Percentplantcanopycoverand numberof forbs were measuredon 120 transectson the herbicide-treated(78 transects)and untreatedcontrol(42 transects)areas. The 1992 survey showedthat areastreatedwithpicloramin 1988, 1989, and 1991 continuedto showevidence of knapweedsuppressioncomparedto controlareas. Herbicidetreatmentin 1991 resultedin a significantreductionin knapweedbased on percentcoverand density. The treatmentareas also all had lowerpercentcanopycoverof perennialforbsand fewer perennialforbs compared to controlareas. Canopy cover of shrubs and annual, biennial, and perennial forbs measuredon the YTC increased between the 1991 and 1992 survey,which may indicate a recovery of these vegetation types after disturbance. These increasesalso could reflect the mild 1992 winter and superior growing conditions in the spring of 1992. We recommendthat these vegetation transects continueto be monitored for an additional growing season to evaluate 1) whether knapweed increasesto its previous abundance in the 1991 herbicide-treated area, 2) the efficacy of herbicide application on transects along roadways, and 3) the increase in invasive annuals in herbicide-treated areas and the possible effects on community vegetation structure and sage grouse habitat.

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Sage grouse on the Yakima Training Center: A summary of studies conducted during 1989 and 1990

Cited by 2 publications

References 14 publications

Sage grouse on the Yakima Training Center: A summary of studies conducted during 1991 and 1992

Sage grouse on the Yakima Training Center: A summary of studies conducted during 1991 and 1992

Vegetation survey of knapweed on the Yakima Training Center - 1992

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