BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:EESS talk on "Invasion of the Killer Quaggas: Coming to a Lake Nea
 r You?"
DTSTART:20190305T121500
DTEND:20190305T130000
DTSTAMP:20260916T034725Z
UID:29310f24a44ace67a8a1ec1ada948222226d7b5f1b42a598bde58a14
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Cary D. Troy\, Associate professor\, Hydraulic and Hydrolog
 ic Engineering\, Purdue University\, Lyles School of Civil Engineering\, U
 SA - is an Associate Professor at Purdue University whose research focuses
  on the physics of large lakes\, particularly Lake Michigan.  Dr. Troy’
 s research interests range from turbulence and mixing to long-term coastli
 ne evolution\, and Dr. Troy’s lab conducts laboratory experiments\, fiel
 d observations and numerical modeling in a quest to understand these proce
 sses.  Dr. Troy obtained his B.S. from the University of Illinois\, and c
 ompleted his M.S. and Ph.D. at Stanford University\, where he studied inte
 rnal waves in the Environmental Fluid Mechanics Laboratory.  Dr. Troy als
 o teaches numerous undergraduate and graduate courses on a wide range of t
 opics including elementary and environmental fluid mechanics\, basic water
  engineering\, coastal engineering\, transport and mixing in surface water
 s\, and physical limnology.\nAbstract:\nThis talk explores the impacts of 
 invasive quagga mussels in Lake Michigan (USA)\, and highlights the import
 ance of understanding turbulent mixing in quantifying their effect on aqua
 tic ecosystems.  The quagga mussel (dreissena bugensis)\, native to the D
 neiper River in Ukraine\, first arrived in the Laurentian Great Lakes in 1
 989\, most likely arriving as a stowaway in cargo ship ballast water.  By
  1998\, quagga mussels had spread to Lake Michigan\, and lake ecosystem wi
 ll likely never be the same.  The density of quagga mussels in Lake Michi
 gan now exceeds 105 mussels/m2 on much of the lake bottom\,  and with eac
 h mussel filtering ~2 liters of water per day to feed\, the effects on the
  ecosystem have been dramatic for almost all trophic levels of the food we
 b.  A key ingredient to the impact of invasive quagga mussels is the role
  that turbulent mixing plays in the delivery of material to the lake bed.
   This is particularly true in the deeper waters of very large lakes\, wh
 ere turbulence is weak.  When water column turbulence is weak\, quagga mu
 ssels suffer from a delivery limitation\, which limits their impact\; conv
 ersely\, periods of energetic mixing allow mussels to clear the water colu
 mn effectively.  Recent measurements by our team have quantified turbulen
 t mixing in the deep waters of Lake Michigan\, and these measurements show
  profound seasonal difference in turbulent mixing\, with important consequ
 ences for the seasonality of mussel impacts.  The results also highlight 
 important differences between the mixing of very large lakes such as Lake 
 Michigan and other large lakes over the world.  Meanwhile\, the spread of
  quagga mussels worldwide continues unabated\, leaving citizens\, lake man
 agers\, and scientists around the world wondering: is our lake next?
LOCATION:GR C0 01 https://plan.epfl.ch/?room=GRC001
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR