Arid
DOI10.1093/aob/mcg148
Growth and architecture of small honey mesquites under jackrabbit browsing: Overcoming the disadvantage of being eaten
Martinez, AJ; Lopez-Portillo, J
通讯作者Lopez-Portillo, J
来源期刊ANNALS OF BOTANY
ISSN0305-7364
出版年2003
卷号92期号:3页码:365-375
英文摘要

Browsing is an important mortality factor in seedlings and small plants. However, the induced changes in the architecture of plant survivors may influence subsequent browsing, opening the possibility of compensating for the damage done. How jackrabbit (Lepus californicus) browsing affects the growth and architecture of small individuals of honey mesquite, Prosopis glandulosa var. torreyana, a tree/shrub that produces spines at every node, was explored. Naturally established mesquites of unknown age were selected in one site, and 2-year-old mesquites were transplanted in another site. In both cases, half of them were exposed to jackrabbits and the other half were excluded as controls. After 4 years, shoot production (height, length and number of derived shoots) and plant growth (height and cover) increased 1-4-2.5-fold in naturally established controls relative to exposed plants, depending on the measured variable. In the transplant experiment, the increases were 2.8-7-1-fold in controls relative to exposed plants 2 years after initiation of the experiment. The net loss of biomass in treatment vs. control plants in these experiments suggests a negative response to browsing which has been defined as under-compensation. Alternative architectures in honey mesquites were evident at the end of the exclusion experiments: controls had long branches and an extended crown cover, while exposed plants had short branches and a compact crown cover. Results indicated that mesquites were able to grow under browser pressure by packing many stems in a compact matrix armed with spines and producing one or more shoots tall and wide enough to escape from jackrabbits. (C) 2003 Annals of Botany Company.


英文关键词exclusion treatments honey mesquite jackrabbit browsing Lepus californicus spines as mechanical defences plant architecture and growth Prosopis glandulosa var. torreyana semi-arid communities stem modular demography
类型Article
语种英语
国家Mexico
收录类别SCI-E
WOS记录号WOS:000185064200005
WOS关键词GLANDULOSA VAR TORREYANA ; CHIHUAHUAN DESERT ; WOODY-PLANTS ; ACACIA-DREPANOLOBIUM ; MAMMALIAN HERBIVORY ; WATER RELATIONS ; ISLE-ROYALE ; DEFENSE ; VEGETATION ; RESPONSES
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/144085
作者单位(1)Inst Ecol, AC Dept Ecol Vegetal, Xalapa 91000, Veracruz, Mexico;(2)Univ Autonoma Tlaxcala, Ctr Invest Fisiol, Lab Ecol Comportamiento, Tlaxcala 90070, Mexico
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GB/T 7714
Martinez, AJ,Lopez-Portillo, J. Growth and architecture of small honey mesquites under jackrabbit browsing: Overcoming the disadvantage of being eaten[J],2003,92(3):365-375.
APA Martinez, AJ,&Lopez-Portillo, J.(2003).Growth and architecture of small honey mesquites under jackrabbit browsing: Overcoming the disadvantage of being eaten.ANNALS OF BOTANY,92(3),365-375.
MLA Martinez, AJ,et al."Growth and architecture of small honey mesquites under jackrabbit browsing: Overcoming the disadvantage of being eaten".ANNALS OF BOTANY 92.3(2003):365-375.
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