Jayne Belnap, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 256
Exotic plant invasion alters nitrogen dynamics in an arid grassland
The introduction of nonnative plant species may decrease ecosystem stability by altering the availability of nitrogen (N) for plant growth. Invasive species can impact N availability by changing litter quantity and quality, rates of N2-fixation, or rates of N loss. We quantified the effects of invasion by the annual grass Bromus tectorum on N cycling in an arid grassland on the Colorado...
Authors
R.D. Evans, R. Rimer, L. Sperry, Jayne Belnap
Soil biota in an ungrazed grassland: Response to annual grass (Bromus tectorum) invasion
Bromus tectorum is an exotic annual grass that currently dominates many western U.S. semi-arid ecosystems, and the effects of this grass on ecosystems in general, and soil biota specifically, are unknown. Bromus recently invaded two ungrazed and unburned perennial bunchgrass communities in southeastern Utah. This study compared the soil food-web structure of the two native grassland...
Authors
Jayne Belnap, Susan L. Phillips
The influence of biological soil crusts on mineral uptake by associated vascular plants
Soil surfaces dominated by cyanobacteria and cyanolichens (such as Collema sp.) are widespread in deserts of the world. The influence of these biological soil crusts on the uptake of bioessential elements is reported for the first time for six seed plants of the deserts of Utah. This sample almost doubles the number of species for which the influence of biological soil crusts on mineral...
Authors
K.T. Harper, Jayne Belnap
Biological Soil Crusts: Webs of Life in the Desert
Although the soil surface may look like dirt to you, it is full of living organisms that are a vital part of desert ecosystems. This veneer of life is called a biological soil crust. These crusts are found throughout the world, from hot deserts to polar regions. Crusts generally cover all soil spaces not occupied by green plants. In many areas, they comprise over 70% of the living ground...
Authors
Jayne Belnap
Patterns of plant invasions: A case example in native species hotspots and rare habitats
Land managers require landscape-scale information on where exotic plant species have successfully established, to better guide research, control, and restoration efforts. We evaluated the vulnerability of various habitats to invasion by exotic plant species in a 100,000 ha area in the southeast corner of Grand Staircase-Escalante National Monument, Utah. For the 97 0.1-ha plots in 11...
Authors
T.J. Stohlgren, Yuka Otsuki, C.A. Villa, M. Lee, J. Belnap
Biological soil crusts of Mongolia- Impacts of grazing and precipitation on nitrogen inputs
No abstract available.
Authors
Jayne Belnap, D. Ojima, N.N. Barger
Ecosystem sustainability and condition
No abstract available.
Authors
C.Ronald Carroll, Jayne Belnap, Gary K. Meffe
Factors influencing production systems of the Mongolian Steppe: Potential global change on semi-arid ecosystems
No abstract available.
Authors
D. Ojima, Larry L. Tieszen, T. Chuluun, Jayne Belnap, J. E. Dodd, Z. Chen
Long-term consequences of disturbance on nitrogen dynamics in an arid ecosystem
Anthropogenic activity is causing dramatic changes in the nitrogen (N) cycle in many ecosystems. Most research has focused on the increase in N input caused by atmospheric deposition and invasion of N-fixing species, and on their effects on resource availability and species composition. However, in contrast to many ecosystems experiencing large increases in N input, many arid ecosystems...
Authors
R.D. Evans, J. Belnap
Photosynthesis of the cyanobacterial soil-crust lichen Collema tenax from arid lands in southern Utah, USA: Role of water content on light and temperature responses of CO2 exchange
1. The gelatinous cyanobacterial Collema tenax is a dominant lichen of biotic soil crusts in the western United States. In laboratory experiments, we studied CO2 exchange of this species as dependent on water content (WC), light and temperature. Results are compared with performance of green-algal lichens of the same site investigated earlier.2. As compared with published data...
Authors
Otto L. Lange, Jayne Belnap, H. Reichenberger
Science and Products
Filter Total Items: 256
Exotic plant invasion alters nitrogen dynamics in an arid grassland
The introduction of nonnative plant species may decrease ecosystem stability by altering the availability of nitrogen (N) for plant growth. Invasive species can impact N availability by changing litter quantity and quality, rates of N2-fixation, or rates of N loss. We quantified the effects of invasion by the annual grass Bromus tectorum on N cycling in an arid grassland on the Colorado...
Authors
R.D. Evans, R. Rimer, L. Sperry, Jayne Belnap
Soil biota in an ungrazed grassland: Response to annual grass (Bromus tectorum) invasion
Bromus tectorum is an exotic annual grass that currently dominates many western U.S. semi-arid ecosystems, and the effects of this grass on ecosystems in general, and soil biota specifically, are unknown. Bromus recently invaded two ungrazed and unburned perennial bunchgrass communities in southeastern Utah. This study compared the soil food-web structure of the two native grassland...
Authors
Jayne Belnap, Susan L. Phillips
The influence of biological soil crusts on mineral uptake by associated vascular plants
Soil surfaces dominated by cyanobacteria and cyanolichens (such as Collema sp.) are widespread in deserts of the world. The influence of these biological soil crusts on the uptake of bioessential elements is reported for the first time for six seed plants of the deserts of Utah. This sample almost doubles the number of species for which the influence of biological soil crusts on mineral...
Authors
K.T. Harper, Jayne Belnap
Biological Soil Crusts: Webs of Life in the Desert
Although the soil surface may look like dirt to you, it is full of living organisms that are a vital part of desert ecosystems. This veneer of life is called a biological soil crust. These crusts are found throughout the world, from hot deserts to polar regions. Crusts generally cover all soil spaces not occupied by green plants. In many areas, they comprise over 70% of the living ground...
Authors
Jayne Belnap
Patterns of plant invasions: A case example in native species hotspots and rare habitats
Land managers require landscape-scale information on where exotic plant species have successfully established, to better guide research, control, and restoration efforts. We evaluated the vulnerability of various habitats to invasion by exotic plant species in a 100,000 ha area in the southeast corner of Grand Staircase-Escalante National Monument, Utah. For the 97 0.1-ha plots in 11...
Authors
T.J. Stohlgren, Yuka Otsuki, C.A. Villa, M. Lee, J. Belnap
Biological soil crusts of Mongolia- Impacts of grazing and precipitation on nitrogen inputs
No abstract available.
Authors
Jayne Belnap, D. Ojima, N.N. Barger
Ecosystem sustainability and condition
No abstract available.
Authors
C.Ronald Carroll, Jayne Belnap, Gary K. Meffe
Factors influencing production systems of the Mongolian Steppe: Potential global change on semi-arid ecosystems
No abstract available.
Authors
D. Ojima, Larry L. Tieszen, T. Chuluun, Jayne Belnap, J. E. Dodd, Z. Chen
Long-term consequences of disturbance on nitrogen dynamics in an arid ecosystem
Anthropogenic activity is causing dramatic changes in the nitrogen (N) cycle in many ecosystems. Most research has focused on the increase in N input caused by atmospheric deposition and invasion of N-fixing species, and on their effects on resource availability and species composition. However, in contrast to many ecosystems experiencing large increases in N input, many arid ecosystems...
Authors
R.D. Evans, J. Belnap
Photosynthesis of the cyanobacterial soil-crust lichen Collema tenax from arid lands in southern Utah, USA: Role of water content on light and temperature responses of CO2 exchange
1. The gelatinous cyanobacterial Collema tenax is a dominant lichen of biotic soil crusts in the western United States. In laboratory experiments, we studied CO2 exchange of this species as dependent on water content (WC), light and temperature. Results are compared with performance of green-algal lichens of the same site investigated earlier.2. As compared with published data...
Authors
Otto L. Lange, Jayne Belnap, H. Reichenberger