Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2012JG002160 |
Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar | |
Raz-Yaseef, Naama; Koteen, Laura; Baldocchi, Dennis D. | |
通讯作者 | Raz-Yaseef, Naama |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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ISSN | 2169-8953 |
EISSN | 2169-8961 |
出版年 | 2013 |
卷号 | 118期号:1页码:135-147 |
英文摘要 | The binary nature of Northern California’s ecohydrology, in which water is either abundantly available or scarce, should be reflected in the root architecture of the native blue oak. Our objective was to quantify carbon storage and understand how the form of the root system facilitates ecosystem functioning despite the asynchrony between winter water availability, spring leaf growth, and dry-summer canopy maintenance. To do this, we surveyed coarse root distribution with a ground penetrating radar (GPR), due to its advantages in covering large areas rapidly and non-destructively. We calibrated root biomass detected by GPR against roots excavated from a number of small pits. Based on a survey of six tree configurations (varying in age, size, and clumping), we found that coarse roots occupy the full soil profile and that coarse root biomass of old large trees reached a peak directly above the bedrock. As opposed to other semi-arid regions, where trees often develop extensive shallow lateral coarse roots to exploit the entire wet-soil medium, we found that root density decreased with distance from the bole, and dropped sharply beyond a distance of 2 m. We upscaled tree root biomass to stand scale (2.8 +/- 0.4 kg m(-2)) based on lidar analysis of the relative abundance of each tree configuration. We argue that this deep and narrow root structure reflects the ecohydrology of oaks in this ecosystem. An extensive lateral root system would not be beneficial during the growing season, when water is sufficiently abundant, nor during summer, when soil water is highly limited. Citation: Raz-Yaseef, N., L. Koteen, and D. D. Baldocchi (2013), Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar, J. Geophys. Res. Biogeosci., 118, 135-147, doi:10.1029/2012JG002160. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000317844700011 |
WOS关键词 | TREE ROOTS ; QUERCUS-DOUGLASII ; WATER RELATIONS ; GRASS SAVANNA ; PLANT-ROOTS ; BLUE OAKS ; BIOMASS ; SOIL ; PATTERNS ; ECOSYSTEM |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Geology |
来源机构 | University of California, Berkeley |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/178426 |
作者单位 | Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Raz-Yaseef, Naama,Koteen, Laura,Baldocchi, Dennis D.. Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar[J]. University of California, Berkeley,2013,118(1):135-147. |
APA | Raz-Yaseef, Naama,Koteen, Laura,&Baldocchi, Dennis D..(2013).Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,118(1),135-147. |
MLA | Raz-Yaseef, Naama,et al."Coarse root distribution of a semi-arid oak savanna estimated with ground penetrating radar".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 118.1(2013):135-147. |
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