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i: ~ : A;: ;:~: W~ ; :: I: :~ ~~ ~~ ~ i: By ~-~3,( Plate 1 Location of ~lmeriFl?'x sites across the cotermino?~s United States. Red dots represent the 52~1meriFl?vx sites. SOURCE: modf ed after http.// research. esd. ornl.go~v/~hnw/networks/f7?~xd?vmmy;fing

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West Nile Virus Activilv 2003 ~ ~US.~_ot - - brbr: ~~ u=_:s~: Id: r ~ ~ ~ Or:::: I: ~ i:: vats ~ : : _POSImlE TEST RESULTS :_ : :: i:: : _SA - "S~lESn!D ONODATA~ Plate 2 Map showing areas where wild birds have been testedpositivefor West Nile virus ire the United States. SOURCE: htip.//westr~ilemaps.?vsgs.gov/?~sa_aviarz.html.

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'i -1 Zebm Murisel Sight ngs D;sl~ but: Dreissena polymorpha / ~ ~ l : ~ Ski If: ~:~ ~~ ~ ~ ' ~ ~~ - ~ ~ {~ Ace, ~ ~ ~ ~ ~~ ~ ~ ~ ~ ~ ; i ~ ~ ~ ~ - - ~ .~ _~ 9 ~ j., ~` , ~ ~ ~ ~\ ~ - - ~;~ ~i. ~ ~ :;~: ~ ~ ~ ~: ,: i:: ~ ~~ ; it: it: :~: ,: ~ '; ~vr4w^7,, ~ ~ it _ ~~.'V~"~ ~ Act ~~? ~;~ ~ Mapproducr~dbytheU.S.GeologicalSurvey,Gainesville~O=6berZOD,) :", ,~ <,, I,, ~ / v~;:~:~\l `~> . ~ 'a ~ No . ~ I,. Plate 3 Map showing the extent of zebra mussel invasion irz North America as of September2002. SOURCE: http.//nas.er.usgs.gov/mollusks/maps/ cz~wer~t_zm_map.jig.

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Plate 4 Aerialphotograph of the aspen Free-Air Carbon Dioxide Enrichment (FACES experimental site. The Aspen FACE experiment is a multidisciplinary study to assess the effects of increasing tropospheric ozone and cartoon dioxide on aspen-forest ecosystems. SOURCE: bttp.//aspenface. mix. eddy

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r- ~1 Plate 5 Eddy covariar~ce tower. The development of the eddy covariar~ce meilodfor meas?~rir~g ret carport balances over short intervals has revol?~tior~ized ecosystem loiogeoclemical studies. Eddy covariar~ce provides a renew window into ecosystewf?~r~ctiorl that increases our ?vr~derstar~dir~g of the processes arid controls that determine element i7alar~ces. SOURCE. pity.// l arvardf o rest f as. Harvard. eddy

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Plate 6 Hubbard Brook Lor~g-Term Ecological Research (LTERJ. Watershed 5 at Hubbard Brook LTER qvas whole-tree clear-c?~tirom aut?~mrz 1983 through spring 1984 This watershed mar~ip?vlatiorz was designed to assess the elects of a commercial qvhole-tree harvest on n?~trier~t cycles. SOURCE: http.//:vwqv.h?~bbard~rook.org/ research/gallery/aerial/W5.jig.

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Plate 7 ~lerialphotograph of plotsfor studying biodiversity at Cedar Creek Long- Term Ecological Research (LTERJ site. Cedar Creek LTER, one of the lor~gest- 'unr~ingfoiodiversityst?vdies,beganirz1994.SOURCE:DavidTilmar~.