Differences in herbivore damage and performance among Arctium minus (burdock) genotypes sampled from a geographic gradient: a common garden experiment

Lee, Yoonsoo; Kotanen, Peter M.

doi:10.1007/s10530-014-0737-7

Cited by 9 publications

(12 citation statements)

References 39 publications

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“…The inconsistency of latitudinal patterns in herbivory reported by these studies indicate that gradients in damage, while they sometimes do occur, may be scarcer than previously believed. An additional complication stems from the fact that most of these studies have focused on herbivory of native species, while few have considered interactions in marginal populations of exotics (but see Harvey et al 2013;Kambo and Kotanen 2014;Lee and Kotanen 2014).…”

Section: Introductionmentioning

confidence: 99%

Variation in herbivory along a latitudinal gradient for native and exotic Asteraceae

2016

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HOW TO CITE TSPACE ITEMSAlways cite the published version, so the author(s) will receive recognition through services that track citation counts, e.g. Scopus. If you need to cite the page number of the TSpace version (original manuscript or accepted manuscript) because you cannot access the published version, then cite the TSpace version in addition to the published version using the permanent URI (handle) found on the record page. ABSTRACTIt has long been hypothesized that biotic interactions, including herbivory, are most intense at lower latitudes.However, this generalization has recently been challenged with studies showing that latitudinal gradients in damage may be rarer than previously believed. Additionally, most studies have focused on herbivory of native species, so it remains unknown whether natives and exotics follow similar patterns. This study compares rates of aboveground herbivory of multiple native and non-native Asteraceae across a latitudinal gradient, with a more detailed investigation of a focal exotic, Cirsium arvense. Herbivory of multiple tissue types was quantified for all species across an 815 kilometre transect in Ontario, Canada. The native Asteraceae included in the survey typically experienced a decline in folivory with increasing latitude. Herbivory patterns for the exotic species were less clear; while most experienced high damage at the southernmost site, some also experienced high damage rates at midlatitudes. For the focal species Cirsium arvense, leaf and stem herbivory declined with increasing latitude, although seed damage showed strong regional variation across the invaded range. These results show that latitudinal variation in herbivory is highly dependent on the plant species being investigated, the tissue type being measured, and the type of herbivore(s) causing the damage. In some cases, populations in marginal areas might benefit from reduced damage by some groups of herbivores. In other cases, factors such as the availability of suitable habitat, the biology of specific enemies, and the origin of the host plant may override the influence of latitude on host performance.

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Section: Introductionmentioning

confidence: 99%

Variation in herbivory along a latitudinal gradient for native and exotic Asteraceae

2016

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“…1.2 | Hypothesis 2: Plants lose a higher proportion of their seeds to pre-dispersal seed predation at lower latitudes at the within-species level Previous studies of the relationship between pre-dispersal seed predation and latitude have found positive (Anstett et al, 2014;Moreira et al, 2015;Toju & Sota, 2006), negative (Kambo & Kotanen, 2014;Verhoeven & Biere, 2013) or no relationship (Alexander, Price, Houser, Finch, & Tourtellot, 2007;García, Zamora, G omez, Jordano, & Hodar, 2000;Lee & Kotanen, 2015;Montesinos, García-Fayos, & Verd u, 2010). These empirical studies were all on single species, but no statistical synthesis can be made owing to the scarcity of such studies.…”

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Plants do not suffer greater losses to seed predation towards the tropics

Chen

Hemmings

Fang

et al. 2017

Global Ecol Biogeogr

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Aim Biotic interactions have traditionally been predicted to be stronger towards the tropics. However, all previous studies about the latitudinal gradient in seed predation were either based on single species or compiled data from studies that used different methods in different ecosystems. Our goal was to provide the first broad‐scale quantification of the latitudinal gradient in seed predation at both cross‐species and within‐species levels. Location Twenty‐five sites spanning 28° of latitude on the east coast of Australia. Methods Using consistent protocols, we measured pre‐dispersal seed predation for 256 species × site combinations (including a total of 170 species) and post‐dispersal seed removal for 126 species × site combinations (including a total of 91 species), as well as removal of standard rice grains at each site. The relationships between seed predation and latitude were quantified using generalized mixed‐effects models and meta‐analyses. Results Contrary to expectations, the proportion of seeds lost to pre‐dispersal seed predation increased with latitude at the cross‐species level and showed no latitudinal trend at the within‐species level. There was no significant relationship between latitude and the proportion of seeds lost to post‐dispersal seed removal, either within species or across species. We found significantly higher removal of standard rice grains at lower latitudes, but this trend reversed if we excluded the four island sites from analysis. Main conclusions Seed predation on natural seeds was not higher at lower latitudes. Thus, our study joins a growing body of evidence contrary to the idea that tropical species suffer greater losses to herbivores than do temperate species. The latitudinal gradient in removal rates for standard rice grains suggests that natural seeds from low latitudes may have achieved a similar predation rate to high‐latitudinal species through increased investment in defenses. However, additional data will be necessary to test this hypothesis.

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“…Considering only the basal leaves in our dataset does lead to higher damage estimates (up to 20%), but still does not eliminate this discrepancy (overall mean 5% damage, with one population as low as 0.15%). As well, the summer of 2012 was exceptionally hot and dry (Environment Canada 2012) leading to premature wilting of leaves (Lee and Kotanen 2015), which may have inhibited insect damage. The damage levels reported here are much closer to those in the contemporaneous common garden experiment of Lee and Kotanen (2015) (~ 1%-5% for 2012 data), which similarly sampled cauline leaves.…”

Section: Discussionmentioning

confidence: 99%

“…As well, the summer of 2012 was exceptionally hot and dry (Environment Canada 2012) leading to premature wilting of leaves (Lee and Kotanen 2015), which may have inhibited insect damage. The damage levels reported here are much closer to those in the contemporaneous common garden experiment of Lee and Kotanen (2015) (~ 1%-5% for 2012 data), which similarly sampled cauline leaves. Since levels of folivore damage were very low, the effect of this damage on fitness is questionable.…”

Section: Discussionmentioning

confidence: 99%

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Differences in herbivore damage toArctium minusin open and forest habitats in its non-native range

Lee

Kotanen

2017

Botany

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Exotic plants do not always escape enemies in new areas; instead, they may be damaged by coinvading non-native enemies or by enemies recruited from native species. However, even when such enemies exist in an invader's new range, escape may still be possible if particular habitats offer lowdamage refuges. In this study, herbivory on the non-native common burdock (Arctium minus) were compared between open and understory habitats, with high and low sunlight exposure respectively, on five sites in Ontario, Canada. Open-habitat populations showed relatively reduced herbivore damage; this may be due to herbivores occurring less abundantly in open habitats or burdock expressing greater defences in open sites. These results emphasize that enemy release is not an absolute effect, but can depend on an individual's habitat. As well, they suggest herbivory potentially may help to confine burdock primarily to open habitats.

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Differences in herbivore damage and performance among Arctium minus (burdock) genotypes sampled from a geographic gradient: a common garden experiment

Cited by 9 publications

References 39 publications

Variation in herbivory along a latitudinal gradient for native and exotic Asteraceae

Variation in herbivory along a latitudinal gradient for native and exotic Asteraceae

Plants do not suffer greater losses to seed predation towards the tropics

Differences in herbivore damage toArctium minusin open and forest habitats in its non-native range

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