Arid
DOI10.1890/02-0287
Defining a plant’s belowground zone of influence
Casper, BB; Schenk, HJ; Jackson, RB
通讯作者Casper, BB
来源期刊ECOLOGY
ISSN0012-9658
出版年2003
卷号84期号:9页码:2313-2321
英文摘要

The concept of a zone of influence, the area over which a plant alters the environment, forms the basis of many models of plant competition. Because of logistical difficulties, we actually know little about the sizes and shapes of zones of influence belowground. Here we advocate obtaining data on plants’ belowground zones of influence, including the length and distribution of lateral roots, in order to understand better how plants respond to their abiotic soil environment and to other plants. We provide several examples from recent work. First, we present an analysis of a large global data set which shows that maximum lateral root spread correlates with canopy size but that, for a given canopy size, maximum lateral root spread is greater in arid environments and in coarse textured soils. Second, we use an experiment with the weedy annual Abulilon theophrasti to show how using nutrient analogs as tracers yields information about lateral root distributions within populations. In our experimental populations, the belowground zone of influence extended well beyond the closest neighboring plants. Overlap in zones of influence increased in nutrient patches. Third, we propose a new conceptual model of belowground zones of influence based on these and other data sets. The model assumes that the probability of resource uptake or competing with a particular neighbor declines with distance from the stem but that considerable uptake at great distances from the stem is still possible. It also allows for plasticity in root distributions as might occur in spatially heterogeneous soils. Finally, we suggest how better information oil the shapes and sizes of below-round zones of influence will help develop a more predictive framework for understanding plant competition.


英文关键词below ground competition canopy volume lateral rool spread neighborhood models soil resources
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000185226100008
WOS关键词SOIL NUTRIENT HETEROGENEITY ; ABUTILON-THEOPHRASTI MALVACEAE ; MORPHOLOGICAL PLASTICITY ; ROOT PROLIFERATION ; SPATIAL PATTERN ; COMPETITION ; MODEL ; POPULATION ; BIOMASS ; GROWTH
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/144476
作者单位(1)Univ Penn, Dept Biol, Philadelphia, PA 19104 USA;(2)Calif State Univ Fullerton, Dept Biol Sci, Fullerton, CA 92834 USA;(3)Duke Univ, Dept Biol, Durham, NC 27708 USA;(4)Duke Univ, Nicholas Sch Environm & Earth Sci, Durham, NC 27708 USA
推荐引用方式
GB/T 7714
Casper, BB,Schenk, HJ,Jackson, RB. Defining a plant’s belowground zone of influence[J],2003,84(9):2313-2321.
APA Casper, BB,Schenk, HJ,&Jackson, RB.(2003).Defining a plant’s belowground zone of influence.ECOLOGY,84(9),2313-2321.
MLA Casper, BB,et al."Defining a plant’s belowground zone of influence".ECOLOGY 84.9(2003):2313-2321.
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