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What are the combined effects of global climate change and biological invasions on insect community structure?
Components of global change Habitat loss Elevated CO 2 Climate change Invasive species
Insects InvasionsElevated CO 2
Insects InvasionsElevated CO 2
What are the combined effects of elevated CO 2 & plant invasions on insect community structure?
0 10 20 30 40 Elevated [CO2] (n=2)Ambient [CO2] (n=3) Insect richness t=-9.91, df=3, p=0.002
0 10 20 30 40 50 60 Elevated [CO2]Ambient [CO2] Insect abundance t=-2.61,df=2,p=0.12
Role of plant communities? 1.Plant quality? C:N ratios herbivory
0 5 10 15 20 25 30 35 Box elder Goldenrod Blackberry Nepal grassHoneysuckle C:N ratio *
0 5 10 15 20 25 30 35 Herbivory (%) Box elderGoldenrod Blackberry Nepal grassHoneysuckle *
Role of plant communities? 1.Plant quality C:N ratios herbivory 2. Diversity
0 2 4 6 8 10 12 Elevated [CO2]Ambient [CO2] Plant richness t=1.06,df=1.07,p=0.48
0 10 20 30 40 50 05101520 Plant richness Insect richness Elevated Ambient
Role of plant communities? 1.Plant quality C:N ratios herbivory 2. Diversity 3. Invasives
0 10 20 30 40 50 60 70 Elevated [CO2]Ambient [CO2] Honeysuckle cover (%) df=1,t=1.79,p=0.32
0 10 20 30 40 50 020406080100 Honeysuckle cover (%) Insect richness R 2 =0.25, p=0.02
Insects InvasionsElevated CO 2
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