Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11258-006-9257-6 |
Exposure to solar UV-B radiation accelerates mass and lignin loss of Larrea tridentata litter in the Sonoran Desert | |
Day, Thomas A.; Zhang, Elisa T.; Ruhland, Christopher T. | |
通讯作者 | Day, Thomas A. |
来源期刊 | PLANT ECOLOGY |
ISSN | 1385-0237 |
出版年 | 2007 |
卷号 | 193期号:2页码:185-194 |
英文摘要 | We assessed whether exposure to solar ultraviolet-B radiation (UV-B) affects the mass loss of Larrea tridentata (creosotebush) litter in the Sonoran Desert of central Arizona. We placed three types of litter (leaves, twigs, or a natural mixture of leaves, twigs, and seeds) in bags constructed of UV-B-transmitting or UV-B-absorbing filter material that allowed either 85% (near-ambient UV-B treatment) or 15% (reduced UV-B treatment) of the biologically effective solar UV-B to reach litter inside the bags. Bags were placed outdoors for 4-5 months during the winter at two sites: a balcony or on the soil surface of the desert. Mass loss of leaf litter was greater under near-ambient UV-B than reduced UV-B at both sites: 21 (near-ambient) vs. 18% (reduced) on the balcony, and 18 vs. 14% at the desert site. Mass loss of twig litter was also greater under near-ambient UV-B at the desert site. Mass loss of the natural mixture of litter was also greater when exposed to near-ambient UV-B on the balcony, and tended to be greater at the desert site. We estimate that about 14-22% of the total mass loss of leaf litter during our 4-5 month experiments was attributable to solar UV-B exposure. Leaf litter exposed to near-ambient UV-B had lower concentrations of lignin, and fats and lipids, and slightly higher concentrations of holocellulose. The greater mass loss of litter under near-ambient UV-B appeared mainly attributable to loss of lignin, although losses of fats and lipids were also appreciable. A primary reason for greater mass loss of litter under solar UV-B appeared to be photodegradation, particularly of lignin. |
英文关键词 | creosotebush decomposition desert photodegradation UV |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000250380900003 |
WOS关键词 | LEAF-LITTER ; DECOMPOSITION ; SURFACE ; COMMUNITY ; QUALITY ; FUNGI ; CO2 |
WOS类目 | Plant Sciences ; Ecology ; Forestry |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
来源机构 | Arizona State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/155707 |
作者单位 | (1)Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA;(2)Minnesota State Univ, Trafton Sci Ctr, Dept Biol Sci, Mankato, MN 56001 USA |
推荐引用方式 GB/T 7714 | Day, Thomas A.,Zhang, Elisa T.,Ruhland, Christopher T.. Exposure to solar UV-B radiation accelerates mass and lignin loss of Larrea tridentata litter in the Sonoran Desert[J]. Arizona State University,2007,193(2):185-194. |
APA | Day, Thomas A.,Zhang, Elisa T.,&Ruhland, Christopher T..(2007).Exposure to solar UV-B radiation accelerates mass and lignin loss of Larrea tridentata litter in the Sonoran Desert.PLANT ECOLOGY,193(2),185-194. |
MLA | Day, Thomas A.,et al."Exposure to solar UV-B radiation accelerates mass and lignin loss of Larrea tridentata litter in the Sonoran Desert".PLANT ECOLOGY 193.2(2007):185-194. |
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