Why Alien Invaders Succeed: Support for the Escape-from-Enemy Hypothesis

2002 ◽  
Vol 160 (6) ◽  
pp. 705 ◽  
Author(s):  
Wolfe
Keyword(s):  
Enemy Hypothesis

Test of a Natural Enemy Hypothesis on Plant Provenance: Spider Abundance in Native and Exotic Ornamental Landscapes

2017 ◽  
Vol 52 (4) ◽  
pp. 340-351 ◽  
Author(s):  
Matthew H. Greenstone ◽  
Mary L. Cornelius ◽  
Richard T. Olsen ◽  
Mark E. Payton
Keyword(s):  
Natural Enemy ◽  
Enemy Hypothesis ◽  
Spider Abundance

scholarly journals The Enemy of My Enemy Hypothesis: Why Coexisting with Grasses May Be an Adaptive Strategy for Savanna Trees

Ecosystems ◽  
2017 ◽  
Vol 20 (7) ◽  
pp. 1278-1295 ◽  
Author(s):  
Zak Ratajczak ◽  
Paolo D’Odorico ◽  
Kailiang Yu
Keyword(s):  
Adaptive Strategy ◽  
Enemy Hypothesis

scholarly journals Early resistance of alien and native pines against two native generalist insect herbivores: no support for the natural enemy hypothesis

2011 ◽  
Vol 26 (1) ◽  
pp. 283-293 ◽  
Author(s):  
Amparo Carrillo-Gavilán ◽  
Xoaquín Moreira ◽  
Rafael Zas ◽  
Montserrat Vilà ◽  
Luis Sampedro
Keyword(s):  
Natural Enemy ◽  
Insect Herbivores ◽  
Enemy Hypothesis ◽  
Generalist Insect

Stranger Danger: A meta-analysis of the dear enemy hypothesis

2021 ◽  
pp. 104542
Author(s):  
Jo A. Werba ◽  
Adam MM Stuckert ◽  
Matthew Edwards ◽  
Michael W. McCoy
Keyword(s):  
Meta Analysis ◽  
Dear Enemy ◽  
Enemy Hypothesis ◽  
Stranger Danger

The enemy hypothesis: correlates of gall morphology with parasitoid attack rates in two closely related rose cynipid galls

2012 ◽  
Vol 103 (3) ◽  
pp. 326-335 ◽  
Author(s):  
Z. László ◽  
B. Tóthmérész
Keyword(s):  
Wall Thickness ◽  
Related Species ◽  
Model System ◽  
Chamber Wall ◽  
Gall Wasp ◽  
Closely Related Species ◽  
Wasp Species ◽  
Enemy Hypothesis

AbstractWe tested the enemy hypothesis for gall morphology on a model system comprising twoDiplolepisrose gall wasp species and their associated parasitoids. The enemy hypothesis predicts both that gall traits will influence parasitoid attack rates within species, and that galls with contrasting morphologies will support different parasitoid communities. This hypothesis is supported by studies at both intraspecific and broader taxonomic levels (i.e. between genera), but patterns remain to be explored in closely related species. Our aims were to explore the relationships between aspects of gall morphology (number of larval chambers, overall gall size and thickness of the gall wall) in each ofDiplolepis mayriandD. rosae, and to explore correlations between these traits and both the presence/absence (=incidence) and attack rates imposed by parasitoids. We found in both galls that chamber number is positively correlated with gall size. In galls ofD. mayri, parasitoid incidence was negatively correlated with thickness of the wall of the larval chamber, but there was no significant correlation between parasitoid attack rates and overall gall size. InD. rosaegalls, parasitoid incidence was positively correlated with chamber wall thickness, but parasitoid attack rates were negatively correlated with gall size, suggesting that selection may favour the induction of galls containing more larval chambers. These results confirm that gall extended phenotypes can significantly influence enemy attack rates, consistent with the ‘enemy hypothesis’. Further, differences in gall morphology between the twoDiplolepisspecies may underlie differences in their associated parasitoid communities – further research is required to test this hypothesis.

scholarly journals Functional shifts of soil microbial communities associated with Alliaria petiolata invasion

2020 ◽  
Author(s):  
Katherine Duchesneau ◽  
Anneke Golemiec ◽  
Robert I. Colautti ◽  
Pedro M. Antunes
Keyword(s):  
Microbial Communities ◽  
Invasive Plants ◽  
Mycorrhizal Fungi ◽  
Soil Microbial Communities ◽  
Arbuscular Mycorrhizal ◽  
Alliaria Petiolata ◽  
Native Plant ◽  
Soil Microbial Diversity ◽  
Soil Microbial ◽  
Enemy Hypothesis

AbstractSoil feedback is thought to be an important contributor to the success of invasive plants. Despite evidence that invasive plants change soil microbial diversity, the functional roles of microbes impacted by invasion are still unclear. This knowledge is a critical component of our understanding of ecological mechanisms of plant invasion. Mounting evidence suggests Alliaria petiolata can suppress arbuscular mycorrhizal fungi (AMF) to disrupt native plant communities in controlled laboratory and greenhouse experiments, though it is less clear if allelochemicals persist under natural field conditions. Alternatively, invasive plants may accumulate pathogens that are more harmful to competitors as predicted by the Enemy of my Enemy Hypothesis (EEH). We examined changes in functional groups of soil bacteria and fungi associated with ten naturally occurring populations of A. petiolata using amplicon sequences (16S and ITS rRNA). To relate soil microbial communities to impacts on co-occurring plants, we measured root infections and AMF colonization. We found no changes in the diversity and abundance of AMF in plants co-occurring with A. petiolata, suggesting that mycorrhizal suppression in the field may not be as critical to the invasion of A. petiolata as implied by more controlled experiments. Instead, we found changes in pathogen community composition and marginal evidence of increase in root lesions of plants growing with A. petiolata, lending support to the EEH. In addition to these impacts on plant health, changes in ectomycorrhiza, and other nutrient cycling microbes may be important forces underlying the invasion of A. petiolata and its impact on ecosystem function.

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