Arid
DOI10.1029/2012JG002160
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
ISSN2169-8953
EISSN2169-8961
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
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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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