2 Works

Data from: Dietary niche constriction when invaders meet natives: evidence from freshwater decapods

Michelle C. Jackson, Jonathan Grey, Katie Miller, J. Robert Britton & Ian Donohue
1. Invasive species are a key driver of global environmental change, with frequently strong negative consequences for native biodiversity and ecosystem processes. Understanding competitive interactions between invaders and functionally similar native species provides an important benchmark for predicting the consequences of invasion. However, even though having a broad dietary niche is widely considered a key factor determining invasion success, little is known about the effects of competition with functionally similar native competitors on the dietary...

Data from: Reduced dietary conservatism in a wild bird in the presence of intraspecific competition

Keith McMahon & Nicola Marples
The presence of intraspecific competitors can increase foraging costs through exploitation of resources. Optimal foraging theory suggests that when the cost of pursuing one food type increases, alternative resources should be accepted. Accepting novel foods readily might put a competitor at an advantage over its more conservative rivals in the race for sufficient sustinance, but also opens it to the danger of poisoning by chemically protected food. Dietary conservatism is foraging behaviour characterised by a...

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