00410    a2200157   4500020001500000082001500015100001700030245005000047260004200097300002000139650002300159650001200182650001800194700002000212700002000232  a063205266X  a577.6bCLO  aCloss, Gerry  aFreshwater ecologyba scientific introduction  aOxfordbBlackwell Sciencec2004g2003  axiv,221p.c24cm  aFreshwater ecology  aBiology  aLife sciences  aDowmes, Barbara  aBoulton, Andrew