Native insect herbivory limits population growth rate of a non-native thistle
نویسندگان
چکیده
منابع مشابه
Seed availability and insect herbivory limit recruitment and adult density of native tall thistle.
Understanding spatial and temporal variation in factors influencing plant regeneration is critical to predicting plant population growth. We experimentally evaluated seed limitation, insect herbivory, and their interaction in the regeneration and density of tall thistle (Cirsium altissimum) across a topographic ecosystem productivity gradient in tallgrass prairie over two years. On ridges and i...
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although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...
15 صفحه اولImpacts 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 کاملPhylogenetic and trait similarity to a native species predict herbivory on non-native oaks.
Introduced plants tend to experience less herbivory than natives, although herbivore loads vary widely. Herbivores may switch hosts onto an introduced plant for at least two reasons. They may recognize the novel plant as a potential host based on similarity of the plant's traits to the traits of one of its native hosts, a similarity that may or may not exhibit phylogenetic signal. Alternatively...
متن کاملNormalization for speech rate in native and non-native speech
Speech perception involves a number of processes that deal with variation in the speech signal. One such process is normalization for speechrate: local temporal cues are perceived relative to the rate in the surrounding context. It is as yet unclear whether and how this perceptual effect interacts with higher level impressions of rate, such as a speaker’s nonnative identity. Nonnative speakers ...
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ژورنال
عنوان ژورنال: Oecologia
سال: 2014
ISSN: 0029-8549,1432-1939
DOI: 10.1007/s00442-013-2876-4