Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/jare.1999.0530 |
Arroyo water storage and soil nutrients and their effects on gas-exchange of shrub species in the northern Chihuahuan Desert | |
Atchley, MC; de Soyza, AG; Whitford, WG | |
通讯作者 | Whitford, WG |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
出版年 | 1999 |
卷号 | 43期号:1页码:21-33 |
英文摘要 | A variable fraction of the rain falling on desert landscapes runs off and accumulates in ephemeral channels (arroyos), where some of the water is transported downslope. Relatively large amounts of water are stored in arroyo sediments. This water may support high rates of gas-exchange in some riparian species. We examined differences in the timing of flow events, soil water storage, and soil nutrients on gas-exchange rates of shrubs growing on arroyo margins and in adjacent piedmont areas in the Chihuahuan Desert of southern New Mexico, USA. The semi-riparian shrub, Fallugia paradoxa (Apache plume), had very different photosynthetic rates between two arroyos, but transpiration rates did not differ. This may result from nutrient limitation differences between arroyos. At one site, the semi-riparian shrub, Prosopis glandulosa (mesquite), on arroyo margins had access to more water and showed higher rates of gas-exchange compared with non-arroyo mesquite located on nearby piedmont areas. The obligate riparian shrub, Chilopsis linearis (desert willow), had intermediate gas-exchange rates when compared with Apache plume and mesquite, and neither soil water nor nutrient concentrations appeared to affect photosynthesis during the growing season. Variation between and within arroyos was high; however, our data suggest that stored water enabled mesquite of arroyo margins to maintain relatively high rates of gas-exchange. When water was relatively abundant, nutrient availability appeared to limit photosynthetic rates of Apache plume. (C) 1999 Academic Press. |
英文关键词 | Chihuahuan Desert Chilopsis linearis Fallugia paradoxa photosynthesis Prosopis glandulosa soil nutrients soil water storage transpiration |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000083024200002 |
WOS关键词 | PRODUCTIVITY ; ECOSYSTEMS ; COMMUNITY |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | New Mexico State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/137584 |
作者单位 | (1)New Mexico State Univ, Dept Biol, Las Cruces, NM 88003 USA;(2)New Mexico State Univ, USDA ARS Jornada Expt Range, Las Cruces, NM 88003 USA;(3)US EPA, Off Res & Dev, Natl Exposure Res Lab, Div Environm Sci, Las Vegas, NV 89113 USA |
推荐引用方式 GB/T 7714 | Atchley, MC,de Soyza, AG,Whitford, WG. Arroyo water storage and soil nutrients and their effects on gas-exchange of shrub species in the northern Chihuahuan Desert[J]. New Mexico State University,1999,43(1):21-33. |
APA | Atchley, MC,de Soyza, AG,&Whitford, WG.(1999).Arroyo water storage and soil nutrients and their effects on gas-exchange of shrub species in the northern Chihuahuan Desert.JOURNAL OF ARID ENVIRONMENTS,43(1),21-33. |
MLA | Atchley, MC,et al."Arroyo water storage and soil nutrients and their effects on gas-exchange of shrub species in the northern Chihuahuan Desert".JOURNAL OF ARID ENVIRONMENTS 43.1(1999):21-33. |
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