Knowledge Resource Center for Ecological Environment in Arid Area
Variation in creosotebush (Larrea tridentata) canopy morphology in relation to habitat, soil fertility and associated annual plant communities | |
DeSoyza, AG; Whitford, WG; MartinezMeza, E; VanZee, JW | |
来源期刊 | AMERICAN MIDLAND NATURALIST |
ISSN | 0003-0031 |
出版年 | 1997 |
卷号 | 137期号:1页码:13-26 |
英文摘要 | Differences in creosotebush (Larrea tridentata) crown morphology may reflect changes in die relative demand for water vs. nutrient resources, coinciding with shrub growth and development. Creosotebushes with inverted cone-shaped crowns were more abundant in water-limited environments whereas hemispherical shaped creosotebushes were more abundant in less water-limited environments. Cone-shaped creosotebushes accumulated substantially less litter under their canopies than did creosotebushes with hemispherical shaped crowns. Soil nutrient concentrations under conical shrubs were similar to those in intershrub spaces and both of these were significantly less than soil nutrient concentrations under hemispherical shrubs. In ecosystems where overland flow of water exerted a greater influence on the movement of organic litter than did wind, shrub shape had little effect on long-term litter accumulation. No persistent differences in the biomass or diversity of ephemeral taxa exploiting undershrub areas were found, probably because the positive effects of greater nutrient resources under hemispherical shrubs were offset by the limitations imposed by the larger, more dense canopies of hemispherical shrubs. Overall, creosotebush morphology affected litter accumulation patterns and soil nutrient patterns, and must be considered when assessing the heterogeneity of desert ecosystems in the southwestern USA. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:A1997WH05200002 |
WOS关键词 | CHIHUAHUAN DESERT ; NITROGEN AVAILABILITY ; SHRUB ; WATER ; GROWTH ; ECOSYSTEMS ; PATTERNS |
WOS类目 | Biodiversity Conservation ; Ecology |
WOS研究方向 | Biodiversity & Conservation ; 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/2XILL650/133745 |
作者单位 | (1)NEW MEXICO STATE UNIV,DEPT 3JER,USDA ARS,JORNADA EXPT RANGE,LAS CRUCES,NM 88003;(2)US EPA,NATL EXPOSURE RES LAB,CHARACTERIZAT RES DIV,LAS VEGAS,NV 89193 |
推荐引用方式 GB/T 7714 | DeSoyza, AG,Whitford, WG,MartinezMeza, E,et al. Variation in creosotebush (Larrea tridentata) canopy morphology in relation to habitat, soil fertility and associated annual plant communities[J]. New Mexico State University,1997,137(1):13-26. |
APA | DeSoyza, AG,Whitford, WG,MartinezMeza, E,&VanZee, JW.(1997).Variation in creosotebush (Larrea tridentata) canopy morphology in relation to habitat, soil fertility and associated annual plant communities.AMERICAN MIDLAND NATURALIST,137(1),13-26. |
MLA | DeSoyza, AG,et al."Variation in creosotebush (Larrea tridentata) canopy morphology in relation to habitat, soil fertility and associated annual plant communities".AMERICAN MIDLAND NATURALIST 137.1(1997):13-26. |
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