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SUMMARY:Dynamics in forest microclimates provide new insights into biodive
 rsity responses to climate change - Florian Zellweger\, Coomes group
DTSTART:20190516T120000Z
DTEND:20190516T123000Z
UID:TALK123748@talks.cam.ac.uk
CONTACT:Ronelle Roth
DESCRIPTION:Forest microclimates – key regulators of biodiversity and fo
 rest functioning – are often substantially buffered from the macroclimat
 e. Variation in microclimates is thus expected to explain some of the unce
 rtainty in predicting forest biodiversity responses to climate change. Her
 e\, I use data from a network of microclimate sensors across temperate Eur
 opean forests to show that daily maximum air temperatures during summer ar
 e on average cooler by 2.2 °C inside than outside forests\, and that cano
 py cover is a key driver of this temperature buffering. I then use a predi
 ctive approach to reconstruct changes in microclimate maximum temperatures
  in 2900 resurveyed forest plots between 1934 and 2016. The macroclimate a
 nd the microclimate warmed at a similar mean rate (0.43 and 0.44 °C 10 yr
 s-1\, respectively) but microclimate warming rates varied much more (-0.88
  to 2.17 °C 10 yrs-1) than macroclimate warming rates (-0.24 to 1.09 °C 
 10 yrs-1). Microclimate warming was related to plant community shifts towa
 rd warm-adapted species (thermophilisation)\, while macroclimate warming w
 as not. Predictions of forest biodiversity responses to climate and land u
 se change thus greatly depend on changes in canopy cover and associated te
 mperature buffering. Together with advanced microclimate mapping technique
 s based on remote sensing\, our work contributes to more reliable assessme
 nts of ecosystems responses to global change.
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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