Inter- and intraspecific consumer trait variations determine consumer diversity effects in multispecies predator-prey systems

2018 ◽  
Vol 81 (3) ◽  
pp. 243-256 ◽  
Author(s):  
S Flöder ◽  
L Bromann ◽  
S Moorthi
Keyword(s):  
Predator Prey ◽  
Diversity Effects ◽  
Consumer Diversity

scholarly journals Interactive Effects of Disturbance, Productivity, and Consumer Diversity on the Structure of Prey Communities

ISRN Ecology ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-11
Author(s):  
Christopher F. Steiner
Keyword(s):  
Trophic Level ◽  
Prey Abundance ◽  
Interactive Effects ◽  
Disturbance Regime ◽  
System Productivity ◽  
High Productivity ◽  
Compensatory Responses ◽  
Prey Diversity ◽  
Diversity Effects ◽  
Consumer Diversity

Experiments show that consumer diversity can have important effects on the control of prey diversity and abundance. However, theory also indicates that the strength of consumer effects on such properties will vary depending on system productivity and disturbance regime. Using a laboratory-based system composed of ciliate consumers and bacterial prey, I explored the interactive effects of productivity, disturbance, and consumer diversity on prey diversity and trophic-level abundance. Consumer diversity had productivity-dependent effects on bacterial prey that were consistent with theoretical expectations. At low productivity, increasing consumer diversity reduced prey abundance while at high productivity no effects were detected due to compensatory responses among bacteria. In contrast, consumer diversity had weak effects on prey diversity at low productivity but significantly depressed prey diversity at high productivity. Disturbance on consumers enhanced prey diversity but did not alter consumer diversity effects on prey. These results indicate that consumer diversity may play an important role in the regulation of prey communities, but the strength of this effect varies with system productivity.

scholarly journals Nutritional mode and specialization alter protist consumer diversity effects on prey assemblages

2012 ◽  
Vol 66 (3) ◽  
pp. 257-269 ◽  
Author(s):  
J Filip ◽  
LL Müller ◽  
H Hillebrand ◽  
S Moorthi
Keyword(s):  
Nutritional Mode ◽  
Diversity Effects ◽  
Consumer Diversity

Does ambient substrate composition influence consumer diversity effects on algal removal?

Hydrobiologia ◽  
2010 ◽  
Vol 652 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Todd Wellnitz ◽  
Matt Troia ◽  
Megan Ring
Keyword(s):  
Substrate Composition ◽  
Diversity Effects ◽  
Consumer Diversity

Examining workgroup diversity effects: Do group-retention rules help or hinder?

2009 ◽  
Author(s):  
David J. Stanley ◽  
Natalie J. Allen ◽  
Helen M. Williams ◽  
Sarah J. Ross
Keyword(s):  
Workgroup Diversity ◽  
Diversity Effects

Cognition in predator-prey systems: Searching image and prey polymorphism

1997 ◽  
Author(s):  
Alan B. Bond ◽  
Alan C. Kamil ◽  
Christopher Cink
Keyword(s):  
Predator Prey
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