Jack A Morgan
Affiliation: Agricultural Research Service
- Water relations in grassland and desert ecosystems exposed to elevated atmospheric CO2J A Morgan
Rangeland Resources Research Unit, USDA Agricultural Research Service, 1701 Centre Ave, 80526, Fort Collins, CO, USA
Oecologia 140:11-25. 2004..For landscape scale predictions, this analysis calls for a clear distinction between biomass responses due to direct CO2 effects on photosynthesis and those indirect CO2 effects via soil moisture as documented here...
- C4 grasses prosper as carbon dioxide eliminates desiccation in warmed semi-arid grasslandJack A Morgan
USDA ARS, Rangeland Resources Research Unit and Northern Plains Area, Fort Collins, Colorado 80526, USA
Nature 476:202-5. 2011..The results indicate that in a warmer, CO(2)-enriched world, both SWC and productivity in semi-arid grasslands may be higher than previously expected...
- Carbon dioxide enrichment alters plant community structure and accelerates shrub growth in the shortgrass steppeJack A Morgan
Rangeland Resources Research Unit, Agricultural Research Service, United States Department of Agriculture, Fort Collins, CO 80526, USA
Proc Natl Acad Sci U S A 104:14724-9. 2007....
- Elevated CO₂ does not offset greater water stress predicted under climate change for native and exotic riparian plantsLaura G Perry
Department of Biology, Colorado State University, Fort Collins, CO, USA
New Phytol 197:532-43. 2013..Our results suggest that increased aridity will reduce riparian seedling growth despite elevated CO₂, and will reduce growth more for native Salix and Populus than for drought-tolerant exotic species...
- Soil and plant water relations determine photosynthetic responses of C3 and C4 grasses in a semi-arid ecosystem under elevated CO2Daniel R Lecain
USDA ARS Rangeland Resources Research Unit, Crops Research Laboratory, 1701 Centre Avenue, Fort Collins, CO 80526, USA
Ann Bot 92:41-52. 2003..These results suggest that photosynthetic responses of C3 and C4 grasses in this semi-arid ecosystem will be driven primarily by the effect of elevated CO2 on plant and soil water relations...
- Contrasting effects of elevated CO2 and warming on nitrogen cycling in a semiarid grasslandFeike A Dijkstra
Rangeland Resources Research Unit, USDA ARS, Crops Research Laboratory, 1701 Centre Ave, Fort Collins, CO 80526, USA
New Phytol 187:426-37. 2010..Our results indicate a more closed N cycle under elevated CO(2) and a more open N cycle with warming, which could affect long-term N retention, plant productivity, and C sequestration in this semiarid grassland...
- Wetting and drying cycles drive variations in the stable carbon isotope ratio of respired carbon dioxide in semi-arid grasslandJee H Shim
Department of Forest, Rangeland, and Watershed Stewardship, Colorado State University, Fort Collins, CO 80523, USA
Oecologia 160:321-33. 2009..Stable isotopic composition of respiration in semi-arid ecosystems is more temporally and spatially variable than in mesic ecosystems owing to dynamic aspects of pulse precipitation episodes and biological drivers...
- Response of organic and inorganic carbon and nitrogen to long-term grazing of the shortgrass steppeJean D Reeder
Rangeland Resources Research Unit, USDA ARS, 1701 Centre Avenue, Fort Collins, Colorado 80526, USA
Environ Manage 33:485-95. 2004..These results emphasize the importance in semiarid and arid ecosystems of including inorganic C in assessments of the mass and distribution of plant-soil C and in evaluations of the impacts of grazing management on C sequestration...
- Elevated CO2 further lengthens growing season under warming conditionsMelissa Reyes-Fox
1 USDA ARS, Soil Plant Nutrient Research Unit and Northern Plains Area, Fort Collins, Colorado 80526, USA 2
Nature 510:259-62. 2014....
- Rhizosphere interactions, carbon allocation, and nitrogen acquisition of two perennial North American grasses in response to defoliation and elevated atmospheric CO2David J Augustine
Agricultural Research Service, Rangeland Resources Research Unit, USDA, 1701 Centre Ave, Fort Collins, CO 80526, USA
Oecologia 165:755-70. 2011....
- Ecology. Looking beneath the surfaceJack A Morgan
USDA ARS Rangeland Resources Research Unit, 1701 Centre Avenue, Fort Collins, CO 80526, USA
Science 298:1903-4. 2002
- Projected ecosystem impact of the Prairie Heating and CO2 Enrichment experimentWilliam J Parton
Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523 1499, USA
New Phytol 174:823-34. 2007..Model results are consistent with empirical field data suggesting that water and nitrogen will be critical drivers of the semiarid grassland response to global change...
- UV radiation effects on plant growth and forage quality in a shortgrass steppe ecosystemsDaniel G Milchunas
Forest, Range, and Watershed Stewardship Department, Colorado State University, Fort Collins, CO 80523, USA
Photochem Photobiol 79:404-10. 2004..Grazing treatment had large positive effects on current-year productivity only in the wet year and some small positive effects on quality in both wet and dry years. Interactions between UV and grazing treatment were not observed...
- Invasive forb benefits from water savings by native plants and carbon fertilization under elevated CO2 and warmingDana M Blumenthal
USDA ARS, Rangeland Resources Research Unit, 1701 Centre Avenue, Fort Collins, CO, 80526, USA
New Phytol 200:1156-65. 2013..Water-limited ecosystems may therefore be particularly vulnerable to invasion as CO2 increases...
- Next generation of elevated [CO2] experiments with crops: a critical investment for feeding the future worldElizabeth A Ainsworth
US Department of Agriculture, Agricultural Research Service and Photosynthesis Research Unit, Urbana, IL, USA
Plant Cell Environ 31:1317-24. 2008..This is necessary if we are to realize the potential for yield gains in the future...
- Dominant plant taxa predict plant productivity responses to CO2 enrichment across precipitation and soil gradientsPhilip A Fay
Grassland, Soil, and Water Laboratory, USDA ARS, 808 E Blackland Rd, Temple, TX 76502, USA
AoB Plants 7:. 2015..Future research is necessary to isolate and clarify the mechanisms controlling the temporal and spatial variations in the linkages among soil water, community change and plant productivity responses to CO2 enrichment. ..