Arid
DOI10.1002/ece3.3232
The influence of herbivory and weather on the vital rates of two closely related cactus species
Sauby, Kristen E.1; Kilmer, John2,5; Christman, Mary C.3,4; Holt, Robert D.1; Marsico, Travis D.2
通讯作者Sauby, Kristen E.
来源期刊ECOLOGY AND EVOLUTION
ISSN2045-7758
出版年2017
卷号7期号:17页码:6996-7009
英文摘要

Herbivory has long been recognized as a significant driver of plant population dynamics, yet its effects along environmental gradients are unclear. Understanding how weather modulates plant-insect interactions can be particularly important for predicting the consequences of exotic insect invasions, and an explicit consideration of weather may help explain why the impact can vary greatly across space and time. We surveyed two native prickly pear cactus species (genus Opuntia) in the Florida panhandle, USA, and their specialist insect herbivores (the invasive South American cactus moth, Cactoblastis cactorum, and three native insect species) for five years across six sites. We used generalized linear mixed models to assess the impact of herbivory and weather on plant relative growth rate (RGR) and sexual reproduction, and we used Fisher’s exact test to estimate the impact of herbivory on survival. Weather variables (precipitation and temperature) were consistently significant predictors of vital rate variation for both cactus species, in contrast to the limited and varied impacts of insect herbivory. Weather only significantly influenced the impact of herbivory on Opuntia humifusa fruit production. The relationships of RGR and fruit production with precipitation suggest that precipitation serves as a cue in determining the trade-off in the allocation of resources to growth or fruit production. The presence of the native bug explained vital rate variation for both cactus species, whereas the invasive moth explained variation only for O.stricta. Despite the inconsistent effect of herbivory across vital rates and cactus species, almost half of O.stricta plants declined in size, and the invasive insect negatively affected RGR and fruit production. Given that fruit production was strongly size-dependent, this suggests that O.stricta populations at the locations surveyed are transitioning to a size distribution of predominantly smaller sizes and with reduced sexual reproduction potential.


英文关键词Cactoblastis cactorum herbivory Opuntia plant-insect interactions precipitation temperature
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000409529800033
WOS关键词CACTOBLASTIS-CACTORUM LEPIDOPTERA ; CLONAL DESERT CACTUS ; POPULATION-DYNAMICS ; ENVIRONMENTAL VARIATION ; MODEL SELECTION ; SOIL-MOISTURE ; FLORIDA SCRUB ; GLOBAL CHANGE ; PLANT ; OPUNTIA
WOS类目Ecology ; Evolutionary Biology
WOS研究方向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/2XILL650/198508
作者单位1.Univ Florida, Dept Biol, Gainesville, FL 32611 USA;
2.Arkansas State Univ, Dept Biol Sci, Jonesboro, AR USA;
3.Univ Florida, MCC Stat Consulting LLC, Dept Biol, Gainesville, FL USA;
4.Univ Florida, MCC Stat Consulting LLC, Dept Stat, Gainesville, FL USA;
5.Missouri Southern State Univ, Dept Biol, Joplin, MO USA
推荐引用方式
GB/T 7714
Sauby, Kristen E.,Kilmer, John,Christman, Mary C.,et al. The influence of herbivory and weather on the vital rates of two closely related cactus species[J],2017,7(17):6996-7009.
APA Sauby, Kristen E.,Kilmer, John,Christman, Mary C.,Holt, Robert D.,&Marsico, Travis D..(2017).The influence of herbivory and weather on the vital rates of two closely related cactus species.ECOLOGY AND EVOLUTION,7(17),6996-7009.
MLA Sauby, Kristen E.,et al."The influence of herbivory and weather on the vital rates of two closely related cactus species".ECOLOGY AND EVOLUTION 7.17(2017):6996-7009.
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