Arid
DOI10.1098/rspb.2013.2647
Mechanisms of plant-plant interactions: concealment from herbivores is more important than abiotic-stress mediation in an African savannah
Louthan, Allison M.1,2; Doak, Daniel F.1,2; Goheen, Jacob R.2,3,4; Palmer, Todd M.2,5; Pringle, Robert M.2,6
通讯作者Louthan, Allison M.
来源期刊PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN0962-8452
EISSN1471-2954
出版年2014
卷号281期号:1780
英文摘要

Recent work on facilitative plant-plant interactions has emphasized the importance of neighbours’ amelioration of abiotic stress, but the facilitative effects of neighbours in reducing plant apparency to herbivores have received less attention. Whereas theory on stress reduction predicts that competition should be more important in less stressful conditions, with facilitation becoming more important in harsh environments, apparency theory suggests that facilitation should be greater in the presence of herbivores, where it is disadvantageous to be conspicuous regardless of abiotic stress level. We tested the relative strength of neighbours’ stress reduction versus apparency reduction on survival, growth, reproduction and lifetime fitness of Hibiscus meyeri, a common forb in central Kenya, using neighbour removals conducted inside and outside large-herbivore exclosures replicated in arid and mesic sites. In the absence of herbivores, neighbours competed with H. meyeri in mesic areas and facilitated H. meyeri in arid areas, as predicted by stress-reduction mechanisms. By contrast, neighbours facilitated H. meyeri in the presence of herbivory, regardless of aridity level, consistent with plant apparency. Our results show that the facilitative effects arising from plant apparency are stronger than the effects arising from abiotic stress reduction in this system, suggesting that plant-apparency effects may be particularly important in systems with extant large-herbivore communities.


英文关键词abiotic stress facilitation herbivory plant apparency stress-gradient hypothesis
类型Article
语种英语
国家USA ; Kenya
收录类别SCI-E
WOS记录号WOS:000332383100009
WOS关键词GRADIENT HYPOTHESIS ; POSITIVE INTERACTIONS ; CONSUMER PRESSURE ; BIOTIC STRESS ; FACILITATION ; COMPETITION ; SHRUB ; COMMUNITIES ; GRASS ; AVAILABILITY
WOS类目Biology ; Ecology ; Evolutionary Biology
WOS研究方向Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/184481
作者单位1.Univ Colorado, Environm Studies Program, Boulder, CO 80309 USA;
2.Mpala Res Ctr, Nanyuki 10400, Kenya;
3.Univ Wyoming, Dept Bot, Program Ecol, Laramie, WY 82070 USA;
4.Univ Wyoming, Dept Zool & Physiol, Program Ecol, Laramie, WY 82070 USA;
5.Univ Florida, Dept Biol, Gainesville, FL 32611 USA;
6.Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA
推荐引用方式
GB/T 7714
Louthan, Allison M.,Doak, Daniel F.,Goheen, Jacob R.,et al. Mechanisms of plant-plant interactions: concealment from herbivores is more important than abiotic-stress mediation in an African savannah[J],2014,281(1780).
APA Louthan, Allison M.,Doak, Daniel F.,Goheen, Jacob R.,Palmer, Todd M.,&Pringle, Robert M..(2014).Mechanisms of plant-plant interactions: concealment from herbivores is more important than abiotic-stress mediation in an African savannah.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,281(1780).
MLA Louthan, Allison M.,et al."Mechanisms of plant-plant interactions: concealment from herbivores is more important than abiotic-stress mediation in an African savannah".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 281.1780(2014).
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