Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11258-012-0085-6 |
Effects of elevated nitrogen and exotic plant invasion on soil seed bank composition in Joshua Tree National Park | |
Schneider, Heather E.; Allen, Edith B. | |
通讯作者 | Schneider, Heather E. |
来源期刊 | PLANT ECOLOGY
![]() |
ISSN | 1385-0237 |
出版年 | 2012 |
卷号 | 213期号:8页码:1277-1287 |
英文摘要 | We investigated the effects of exotic species invasion and 3 years of nitrogen (N) fertilization on the soil seed bank in Joshua Tree National Park, California, USA at four sites along an N deposition gradient. We compared seed bank composition and density in control (no N added) and fertilized (30 kg N ha(-1) year(-1)) plots to determine if the seed bank would reflect aboveground changes due to N fertilization. Soil samples were collected and germinated in a greenhouse over 2 years. In the field, invasive species cover responded positively to N fertilization. However, we did not observe increased seed density of exotic invasive species in fertilized plots. While no significant differences were detected between treatments within sites, exotic invasive grass seeds overwhelmed the seed bank at all sites. Significant differences between sites were found, which may be due to differences in level of invasion, historic N deposition, and soil surface roughness. Sites experiencing low N deposition had the highest seed bank species richness for both control and fertilized treatments. Aboveground plant density did not correlate well with seed bank density, possibly due to the inherent patchiness of soil seed banks and differential ability of species to form seed banks. This seed bank study provided insight into site-specific impacts on native versus invasive species composition of soil seed banks, as well as magnitude of invasion and restoration potential at invaded sites. |
英文关键词 | Soil seed bank Desert Exotic invasive Joshua Tree National Park Annual plant Schismus |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000306694200007 |
WOS关键词 | SOUTHERN CALIFORNIA DESERTS ; MOJAVE DESERT ; DEPOSITION ; GERMINATION ; CONSEQUENCES ; COMPETITION ; HABITATS ; GRASSES ; FATES ; SHAPE |
WOS类目 | Plant Sciences ; Ecology ; Forestry |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/174462 |
作者单位 | Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA |
推荐引用方式 GB/T 7714 | Schneider, Heather E.,Allen, Edith B.. Effects of elevated nitrogen and exotic plant invasion on soil seed bank composition in Joshua Tree National Park[J],2012,213(8):1277-1287. |
APA | Schneider, Heather E.,&Allen, Edith B..(2012).Effects of elevated nitrogen and exotic plant invasion on soil seed bank composition in Joshua Tree National Park.PLANT ECOLOGY,213(8),1277-1287. |
MLA | Schneider, Heather E.,et al."Effects of elevated nitrogen and exotic plant invasion on soil seed bank composition in Joshua Tree National Park".PLANT ECOLOGY 213.8(2012):1277-1287. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。