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

Content Provider	Springer Nature Link
Author	Nunes, Krystal A. Cassin, Colin M. Kotanen, Peter M.
Copyright Year	2016
Abstract	It 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 km 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 mid-latitudes. For the focal species C. 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.
Starting Page	481
Ending Page	493
Page Count	13
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	217
Issue Number	5
e-ISSN	15735052
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-04-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Latitudinal gradient Herbivory Plant–insect interactions Asteraceae Cirsium arvense Ecology Plant Ecology Community & Population Ecology Terrestial Ecology Applied Ecology Biodiversity
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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