Phenological synchrony affects interaction strength of an exotic weevil with Platte thistle, a native host plant
نویسندگان
چکیده
منابع مشابه
Population Growth of Rhinocyllus conicus (Coleoptera: Curculionidae) on Two Species of Native Thistles in Prairie
The insect Rhinocyllus conicus Froehlich is a flowerhead weevil deliberately introduced into the United States for the biological control of invasive exotic thistles in the genus Carduus. This study documents the course and magnitude of the weevil population expansion onto nontarget host plants. No weevils were reared from either Platte thistle, Cirsium canescens Nuttall, or wavyleaf thistle, C...
متن کاملInvasive insect abundance varies across the biogeographic distribution of a native host plant.
Studies of biogeographic variation in species abundances are fundamental to understanding and predicting the impacts of invasive exotic species. We quantified the abundance of the introduced and now invasive biocontrol weevil, Rhinocyllus conicus, on a newly adopted native host plant, Cirsium canescens (Platte thistle), across the plant's distributional range. We used regression and structural ...
متن کاملImpacts of Plant Size, Density, Herbivory, and Desease on Native Platte Thistle (Cirsium Canescens)
Based on prior field observations, we hypothesized that individual and interacting effects of plant size, density, insect herbivory, and especially fungal disease, influenced seedling and juvenile plant growth in native Platte thistle populations (Cirsium canescens Nutt.). We worked at Arapaho Prairie in the Nebraska Sandhills (May August 2007), monitoring plant growth, insect damage, and funga...
متن کاملEffects of a native parasitic plant on an exotic invader decrease with increasing host age
Understanding changes in the interactions between parasitic plants and their hosts in relation to ontogenetic changes in the hosts is crucial for successful use of parasitic plants as biological controls. We investigated growth, photosynthesis and chemical defences in different-aged Bidens pilosa plants in response to infection by Cuscuta australis. We were particularly interested in whether pl...
متن کاملRe-test of Rhinocyllus conicus host specificity, and the prediction of ecological risk in biological control
Biological control is proposed as an ecological strategy to manage the threat of invasive plants, especially in natural areas. To pursue this strategy, we need to know that the host specificity criteria used to evaluate ecological risk with deliberate introduction of an exotic insect for biocontrol are sufficient to predict potential impact on native species. Host specificity is defined by adul...
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ژورنال
عنوان ژورنال: Oecologia
سال: 2004
ISSN: 0029-8549,1432-1939
DOI: 10.1007/s00442-004-1543-1