Global Change Master Directory gsfc-gcmduso@mail.nasa.gov 50 2013-05-22T04:54:42Z http://mddemo.gsfc.nasa.gov/KeywordSearch/OpenSearch.do 30 0 http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_manitobaspiders -145.27,37.3,-48.11,87.61 2012-12-21T05:00:00Z

An annotated list of spider species is compiled from museum collections and several personal collections. This list includes 483 species in 20 families; 139 species are new provincial ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_graywolves -168.0,43.5,-75.0,55.0 2012-12-21T05:00:00Z

We evaluated the accuracy and precision of tooth wear for aging gray wolves (Canis lupus) from Alaska, Minnesota, and Ontario based on 47 known-age or known-minimum-age skulls. Estimates of age using ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_purpleloostrife -84.2,43.3,-82.5,44.1 1994-01-01T00:00:00Z 1995-12-31T00:00:00Z 2012-12-21T05:00:00Z

Purple loosestrife (Lythrum salicaria), a native of Eurasia, is an introduced perennial plant in North American wetlands that displaces other wetland plants. Although not well studied, purple loosestrife ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_incidentalmarinecatc -140.0,20.0,140.0,50.0 1990-01-01T00:00:00Z 1990-01-01T00:00:00Z 2012-12-21T05:00:00Z

The incidental take of marine birds was estimated for the following North Pacific driftnet fisheries in 1990: Japanese squid, Japanese large-mesh, Korean squid, and Taiwanese squid and large-mesh ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_canvasbacks -102.5,48.0,-95.0,60.0 1974-01-01T00:00:00Z 1980-01-01T00:00:00Z 2012-12-21T05:00:00Z

Age, productivity, and other factors affecting breeding performance of canvasbacks (Aythya valisineria) are poorly understood. Consequently, we tested whether reproductive performance of female canvasbacks ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_muskoxen -86.1,79.5,-85.9,80.5 1998-07-01T00:00:00Z 1998-07-11T00:00:00Z 2012-12-21T05:00:00Z

A lack of young muskoxen (Ovibos moschatus) and arctic hares (Lepus arcticus) in the Eureka area of Ellesmere Island, Northwest Territories (now Nunavut), Canada, was observed during summer ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NPWRC_PlatteSearch -111.0,41.0,-96.0,45.0 1996-01-01T00:00:00Z 1996-12-31T00:00:00Z 2012-12-21T05:00:00Z

Platte-Search is a search-and-retrieval database program with bibliographic information on approximately 1,500 publications, reports, projects and academic studies related to the Platte River Basin. ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NPWRC_PREFER -104.43,45.56,-96.18,49.38 2012-12-21T05:00:00Z

The program PREFER performs calculations described in Johnson (1980) to determine the preference of J individuals for I components (for example, habitat types or kinds of foods) using availability ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_ducks -145.27,37.3,-48.11,87.61 1952-01-01T00:00:00Z 1959-12-31T00:00:00Z 2012-12-20T05:00:00Z

Waterfowl inventories taken during the breeding season are recognized as a basic technique in assessing the number of ducks per unit area. That waterfowl censusing is still an inexact technology leading ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NPWRC_northernpintail -104.43,45.56,-96.18,49.38 1993-01-01T00:00:00Z T00:00:00Z 2012-12-12T05:00:00Z

We adapted a stochastic computer model to simulate productivity of the northern pintail (Anas acuta). Researchers at the Northern Prairie Wildlife Research Center of the U.S. Fish and Wildlife Service ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_acutetoxicity 2012-12-12T05:00:00Z

Laboratory studies were conducted to determine the acute toxicity of three ammonia-based fire retardants (Fire-Trol LCA-F, Fire-Trol LCM-R, and Phos-Chek 259F), five surfactant-based fire-suppressant ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NPWRC_alienplantsrankingsystem -115.0,30.0,-85.0,45.0 2012-12-12T05:00:00Z

The Alien Plants Ranking System (APRS) is a computer-implemented system to help land managers make difficult decisions concerning invasive nonnative plants. The management of invasive plants is difficult, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_alpha -145.27,37.3,-48.11,87.61 1986-01-01T00:00:00Z 1998-12-31T00:00:00Z 2012-12-12T05:00:00Z

The prevailing view of a wolf (Canis lupus) pack is that of a group of individuals ever vying for dominance but held in check by the "alpha" pair, the alpha male and the alpha female. Most research ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NPWRC_checklistamphibianspecies -140.0,30.0,-50.0,89.0 1997-01-01T00:00:00Z T00:00:00Z 2012-12-12T05:00:00Z

The checklist is one of all amphibian species and subspecies currently recognized in North America north of Mexico. This list is based on Crother (2000); published by the Society for the Study of ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NPWRC_effectsoffireonbirdpops -101.0,46.5,-97.0,48.5 1997-01-01T00:00:00Z 1997-12-31T00:00:00Z 2012-12-12T05:00:00Z

The mixed-grass prairie is one of the largest ecosystems in North America, originally covering about 69 million hectares (Bragg and Steuter 1995). Although much of the natural vegetation has been ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_nestingsuccess -145.27,37.3,-48.11,87.61 2012-12-12T05:00:00Z

We followed 3094 upland nests of several species of ducks. Clutches in most nests were lost to predation. We related daily nest predation rates to indices of activity of eight egg-eating predators, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_canislupus -90.0,80.0,-70.0,84.0 1986-01-01T00:00:00Z 1998-12-31T00:00:00Z 2012-12-12T05:00:00Z

L. David Mech examined leadership in Wolf (Canis lupus) packs based on published observations and data gathered during summers from 1986 to 1998 studying a free-ranging pack of Wolves on Ellesmere ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgs_npwrc_saltmam -177.1,13.71,-61.48,76.63 2012-12-12T05:00:00Z

Wildlife species in this brochure have been grouped into four categories: Birds, Mammals, Reptiles and Amphibians, and Fish. All mammals listed are considered resident species with the exception ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrc_d_birds_checklists -125.0,25.0,-67.0,49.0 1996-01-01T00:00:00Z T00:00:00Z 2008-05-20T04:00:00Z

This resource is known as Bird Checklists of the United States. Bird Checklists of the United States. For years, people and groups have developed listings or checklists of birds that occur in a particular ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrc_d_ndfleas -104.0,46.0,-96.5,49.0 2008-05-20T04:00:00Z

The dataset contains distribution maps for the following species of fleas: Aetheca wagneri, Amaradix euphorbi, Amphipsylla sibirica pollionis, Callistopsyllus terinus campestris, Cediopsylla inaequalis ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcd0000003 -177.1,13.71,-61.48,76.63 2008-05-20T04:00:00Z

The expansion of outdoor recreational activities has increased greatly the interaction between the public and waterfowl and waterfowl habitat. The effects of these interactions on waterfowl habitats ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrc_d_newetlandflora -125.0,25.0,-67.0,49.0 1996-01-01T00:00:00Z T00:00:00Z 2008-05-20T04:00:00Z

This Field Guide was prepared by Biotic Consultants, Incorporated, of Carbondale, Illinois, under Contract #53-2D81-3-1. All descriptions have been written by Robert H. Mohlenbrock. Mark Mohlenbrock ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NPWRC_pileatedwoodpecker -104.43,45.56,-96.18,49.38 1900-01-01T00:00:00Z T00:00:00Z 2008-05-20T04:00:00Z

Natural history writings from explorers such as M. Lewis, W. Clark, J. J. Audubon, S. F. Baird, and E. Coues failed to mention the pileated woodpecker (Dryocopus pileatus) in North Dakota throughout ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcb00000013 -104.0,43.0,-96.0,49.0 2006-10-12T04:00:00Z

This bibliography lists as many fisheries biology and related references as possible from North Dakota and South Dakota waters for use by fishery biologists. Selected references from contiguous states ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcb00000016 -125.0,25.0,-67.0,50.0 2006-08-24T04:00:00Z

The success of vegetation management programs for waterfowl is dependent on knowing the physical and physiological requirements of the target species. Lakes and riverine impoundments that contain ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcd0000001 -106.0,40.0,-105.0,40.0 1987-01-01T00:00:00Z 1991-01-01T00:00:00Z 2006-08-24T04:00:00Z

The invasion of exotic plants is becoming a problem in many ecosystems including some areas in Rocky Mountain National Park (RMNP) (Rocky Mountain National Park Resource Management Reports #1 and ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcd00000012 -104.0,46.0,-97.0,49.0 1967-01-01T00:00:00Z 1993-01-01T00:00:00Z 2006-08-24T04:00:00Z

Breeding bird populations in North Dakota were compared using surveys conducted in 1967 and 1992-93. In decreasing order, the five most frequently occurring species were Horned Lark (Eremophia alpestris), ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcs0000004 2006-08-24T04:00:00Z

Northern Prairie has a long history of studying nest success of upland nesting ducks. Over the years, we have developed standardized procedures for collecting and analyzing these types of data. Data ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcd0000005 2006-08-24T04:00:00Z

Waterfowl managers face many difficult decisions about how to manage a particular area to maximize productivity of mallards (Anas platyrhynchos) and other upland nesting waterfowl. The Mallard Model ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]usgsbrdnpwrcd00000002 -98.0,47.0,-98.0,47.0 1993-01-01T00:00:00Z 1998-01-01T00:00:00Z 2006-07-14T04:00:00Z

Laboratory studies with algae, aquatic invertebrates, and fish. Short-term toxicity tests showed that both fire-retardant and foam-suppressant chemicals were very toxic to aquatic organisms including ...