Effects of experimental warming on herbivory and pathogen loads on subalpine grass species Festuca thurberi, Poa pratensis, and Achnatherum lettermanii
Abstract
Rising global temperatures are predicted to alter community dynamics by shifting species ranges and altering biotic interactions. Herbivory is expected to increase with prolonged growing seasons and heightened metabolic rates; pathogen damage may increase as well. We predict that damage by herbivores and pathogens on subalpine grass species Festuca thurberi, Poa pratensis, and Achnatherum lettermanii will increase with warming. Comparisons of estimated percent herbivory on these species in a meadow containing plots subject to experimental warming by infrared heaters and alternating ambient control plots revealed some evidence of increasing herbivory with warming and, thus, increased vulnerability of plants to the indirect effect of global warming of rising herbivore activity.
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References (18)
1 in Knowledge Hub, 17 external