Arid
DOI10.1007/s00442-011-1964-6
Interaction between ungulates and bruchid beetles and its effect on Acacia trees: modeling the costs and benefits of seed dispersal to plant demography
Rodriguez-Perez, Javier1; Wiegand, Kerstin1; Ward, David2
通讯作者Rodriguez-Perez, Javier
来源期刊OECOLOGIA
ISSN0029-8549
EISSN1432-1939
出版年2011
卷号167期号:1页码:97-105
英文摘要

Integrative studies of plant-animal interactions that incorporate the multiple effects of interactions are important for discerning the importance of each factor within the population dynamics of a plant species. The low regeneration capacity of many Acacia species in arid savannas is a consequence of a combination of reduction in seed dispersal and high seed predation. Here we studied how ungulates (acting as both seed dispersers and herbivores) and bruchid beetles (post-dispersal seed predators) modulate the population dynamics of A. raddiana, a keystone species in the Middle East. We developed two simulation models of plant demography: the first included seed ingestion by ungulates and seed predation by bruchids, whereas the second model additionally incorporated herbivory by ungulates. We also included the interacting effects of seed removal and body mass, because larger ungulates destroy proportionally fewer seeds and enhance seed germination. Simulations showed that the negative effect of seed predation on acacia population size was compensated for by the positive effect of seed ingestion at 50 and 30% seed removal under scenarios with and without herbivory, respectively. Smaller ungulates (e.g., < 35 kg) must necessarily remove tenfold more seeds than larger ungulates (e.g., > 250 kg) to compensate for the negative effect of seed predation. Seedling proportion increased with seed removal in the model with herbivory. Managing and restoring acacia seed dispersers is key to conserving acacia populations, because low-to-medium seed removal could quickly restore their regeneration capacity.


英文关键词Herbivory Population growth rate Seed removal Seed predation Simulation models
类型Article
语种英语
国家Germany ; South Africa
收录类别SCI-E
WOS记录号WOS:000293914000010
WOS关键词LARGE MAMMALIAN HERBIVORES ; ASIATIC WILD ASS ; NEGEV DESERT ; POPULATION-DYNAMICS ; AFRICAN SAVANNA ; AMAZONIAN FORESTS ; SIMULATION-MODEL ; LOW RECRUITMENT ; NUBIAN IBEX ; ISRAEL
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/2XILL650/169820
作者单位1.Univ Jena, Inst Ecol, D-07743 Jena, Germany;
2.Univ KwaZulu Natal, Sch Biol & Conservat Sci, ZA-3209 Scottsville, South Africa
推荐引用方式
GB/T 7714
Rodriguez-Perez, Javier,Wiegand, Kerstin,Ward, David. Interaction between ungulates and bruchid beetles and its effect on Acacia trees: modeling the costs and benefits of seed dispersal to plant demography[J],2011,167(1):97-105.
APA Rodriguez-Perez, Javier,Wiegand, Kerstin,&Ward, David.(2011).Interaction between ungulates and bruchid beetles and its effect on Acacia trees: modeling the costs and benefits of seed dispersal to plant demography.OECOLOGIA,167(1),97-105.
MLA Rodriguez-Perez, Javier,et al."Interaction between ungulates and bruchid beetles and its effect on Acacia trees: modeling the costs and benefits of seed dispersal to plant demography".OECOLOGIA 167.1(2011):97-105.
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