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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3604
DTSTART:20150303T180500Z
DTEND:20150303T190000Z
DTSTAMP:20260414T122530Z
LAST-MODIFIED:20150122T232841Z
LOCATION:4274 Chamberlin Hall (Refreshments will be served)
SUMMARY:Linking dynamics of chemistry\, physiology and genetics in eco
 systems through spectroscopy\, Chaos & Complex Systems Seminar\, Phil 
 Townsend\, UW Department of Forest &Wildlife Ecology
DESCRIPTION:Contact and imaging spectroscopy show great promise for me
 asurement of the physiology of ecosystems related both to environmenta
 l drivers and genetics. Over the last decade\, researchers have demons
 trated the use of reflectance spectroscopy to rapidly and accurately c
 haracterize features of ecosystems that previously entailed considerab
 le monetary expense and effort\, and/or were not thought to be mappabl
 e. We have discovered that plant spectra provide a record of plant tra
 its and can be exploited to better understand their function in time a
 nd space. Though we do not understand all drivers of variation -- at l
 eaf\, canopy and ecosystem levels -- here I will provide evidence that
  we can infer properties ranging from gene expression to photosyntheti
 c capacity to nutrient availability. For example\, we have used spectr
 oscopy to characterize forest response to insect herbivores and to tra
 ck foliar chemistry as it is related to forest productivity and nutrie
 nt availability following logging. In agricultural settings\, spectros
 copy offers the capacity to measure the physiological effects of pests
  such as aphids and disease on plant physiology and ultimately yield. 
 In aspen forests\, we show how traits and genetics co-vary based on in
 ferences from imaging spectroscopy. The potential future applications 
 of these methods are extensive\, and adaptation of spectrometers to de
 ploy in a range of settings will enable us to bridge the gaps in spati
 al and temporal measurement capacity from the leaf/canopy to airborne 
 to spaceborne levels.
URL:https://www.physics.wisc.edu/events/?id=3604
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