WorldCat Identities

Hall, Derek B.

Overview
Works: 8 works in 10 publications in 1 language and 471 library holdings
Genres: Academic theses 
Roles: Author
Classifications: SD404,
Publication Timeline
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Most widely held works by Derek B Hall
Competitive effects of bluebunch wheatgrass, crested wheatgrass, and cheatgrass on antelope bitterbrush seedling emergence and survival by Derek B Hall( )

3 editions published in 1999 in English and held by 464 WorldCat member libraries worldwide

"The competitive environment into which plant seedlings emerge often determines the survival and performance of these individuals. This study was designed to determine the effects of bluebunch wheatgrass (Pseudoroegneria spicata), crested wheatgrass (Agropyron cristatum), and cheatgrass (Bromus tectorum) on soil moisture depletion, associated antelope bitterbrush (Purshia tridentata) seedling emergence, xylem pressure potential, and subsequent survival. In the fall of 1992, antelope bitterbrush seed was sown into the following four established competitive matrices: (1) bluebunch wheatgrass, (2) crested wheatgrass, (3) cheatgrass, and (4) bare soil control plots. Soil moisture and bitterbrush seedling xylem pressure potential data were collected through the spring and summer of 1993. Antelope bitterbrush seedling survival data were collected through the spring and summer of 1993, and again in July 1994. Invasion of bur buttercup (Ranunculus testiculatus) in the spring of 1993 increased the competitive environments with densities of 470 plants per m2 in the crested wheatgrass, 760 in bluebunch wheatgrass, 920 in control and 1,060 in cheatgrass plots. Soil moisture in crested wheatgrass plots tended to be lower than soil moisture in the bluebunch wheatgrass plots. The number of emerged bitterbrush seedlings were significantly (r2 = 0.99) negatively correlated with the number of total annuals per m2. Antelope bitterbrush seedling xylem pressure potentials were less negative in the bluebunch wheatgrass plots compared with the other plots. Percent antelope bitterbrush seedling survival over 2 years was significantly higher (nearly twice) when grown in association with bluebunch wheatgrass than seedlings grown in association with crested wheatgrass, cheatgrass, or bur buttercup."
Getting the biggest bang for your buck : wildlife monitoring on shrublands of the Nevada test site by Derek B Hall( )

1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide

"The Nevada Test Site (NTS) covers 3,561 km2 and extends over portions of both the Mojave and Great Basin Deserts. The resulting diverse and complex flora and fauna exhibit elements of both deserts. There are 20 vegetation associations, composed primarily of shrubs, nested within 10 vegetation alliances. Of the more than 1,200 invertebrate and 339 vertebrate species found in these shrubland habitats, 267 are considered sensitive or protected/regulated by federal or state laws. Wildlife and wildlife habitat monitoring ensures NTS activities comply with all federal and state laws enacted for the protection of these valuable biological resources and provides ecological information that can be used to predict and evaluate the potential impacts of proposed projects and current activities on these resources. This paper describes the monitoring approach used at this large site. Monitoring strategies include conducting preactivity surveys, proactively monitoring sensitive species, monitoring long-term population trends, and collaborating with other agencies and biologists. Ways to make monitoring more efficient and examples of successful monitoring and collaborations are discussed."
Regional and seasonal diet of the Western Burrowing Owl in south central Nevada by Derek B Hall( )

1 edition published in 2009 in English and held by 2 WorldCat member libraries worldwide

Ecological Monitoring and Compliance Program 2007 Report( Book )

1 edition published in 2008 in English and held by 1 WorldCat member library worldwide

In accordance with U.S. Department of Energy (DOE) Order 450.1, 'Environmental Protection Program', the Office of the Assistant Manager for Environmental Management of the DOE, National Nuclear Security Administration Nevada Site Office (NNSA/NSO) requires ecological monitoring and biological compliance support for activities and programs conducted at the Nevada Test Site (NTS). National Security Technologies, LLC (NSTec), Ecological Services has implemented the Ecological Monitoring and Compliance (EMAC) Program to provide this support. EMAC is designed to ensure compliance with applicable laws and regulations, delineate and define NTS ecosystems, and provide ecological information that can be used to predict and evaluate the potential impacts of proposed projects and programs on those ecosystems. This report summarizes the EMAC activities conducted by NSTec during calendar year 2007. Monitoring tasks during 2007 included eight program areas: (a) biological surveys, (b) desert tortoise compliance, (c) ecosystem mapping and data management, (d) sensitive plant monitoring, (e) sensitive and protected/regulated animal monitoring, (f) habitat monitoring, (g) habitat restoration monitoring, and (h) biological monitoring at the Nonproliferation Test and Evaluation Complex (NPTEC). The following sections of this report describe work performed under these eight areas
Shrub recruitment inhibition in different herbaceous understories by Derek B Hall( )

1 edition published in 1994 in English and held by 1 WorldCat member library worldwide

Competitive effects of bluebunch wheatgrass, crested wheatgrass, and cheatgrass on antelope bitterbrush seedling emergence and survival by Derek B Hall( Book )

1 edition published in 1999 in English and held by 0 WorldCat member libraries worldwide

Competitive effects of bluebunch wheatgrass, crested wheatgrass, and cheatgrass on antelope bitterbrush seedling emergence and survival by Derek B Hall( Book )

1 edition published in 1999 in English and held by 0 WorldCat member libraries worldwide

 
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.51 (from 0.51 for Competitiv ... to 1.00 for Shrub recr ...)

Languages
English (10)