Life Inside an Acorn: How Microclimate and Microbes Influence Nest Organization in Temnothorax Ants

• DOI: 10.1111/eth.12525
• Publication Date: 2016-08-22T10:52:45Z
• Authors: Joseph Karlik; Mary Jane Epps; Robert R. Dunn; Clint A. Penick
• Keywords: Acorn; Microclimate

Abstract Nests provide a buffer against environmental variation, but conditions may also vary at different locations within nest. Conditions can based on abiotic factors, such as moisture and temperature, well biotic the presence of microbes potential pathogens. Therefore, characterizing how animals adjust their position inside nests to track microclimate preferences while same time preventing pathogen exposure is necessary understand benefits provide. Here we studied colonies acorn‐nesting ant Temnothorax curvispinosus responded experimental manipulation moisture, microbial growth nests. Colonies showed no response differences in moved bottom acorn regardless treatment. When were heated from top simulate warming by sun, workers preferentially brood warm, upper half acorn, which would stimulate development. Finally, strongest factor that influenced colony was nest—colonies avoided nest when it inoculated with microbes, new acorns shifted over mold other had grow. The relatively strong T. suggests pressures—in addition microclimate—have significant impact use spaces. Social insects are known invest heavily antimicrobial compounds kill or slow avoidance represent an additional line defense prevent exposure.