Biology Dc,j)ot./ttret~/. Wc.t/ertr Wtr.\lritr,y/otr Utri~rer.\i/y, Bellitr,qlrtrt~r, W A , U . S . A . 98225Received April 24. 1978 DISRAELI, D. J., and R. W. FOND,%. 1979. G~x d i e n t analysisof the vegetation in a brackish marsh in Bellingham Bay, Washington. Can. J . Bot. 57: 465-475. 'The islands in thedelta ofthe Nooksack R i v e r s~~p p o r t ;I brackish m;lrsh with maximum salinity of 5.18 parts per tho~lsand (ppt). On high tides, the marsh is flooded with water from the river rnthel-than born Bellingham Bay. Marsh species were distributed according to combinations of elevation. length of tidal submergence. sand and silt content of the soil, and soil moisture. Two broacl marsh zones were recognized. The Scitprrs ottro.ic~otrrrs marsh occurs below 274 cm above mean lower low watel-(MLLW). where it is submerged on nearly all high tides. It has over 70 subme~gence days per year. Soils are sandy but poorly drained, and aerial biomass is low. The Ctrt,c.r lytrghyei marsh occupies sites above 274 cm. This zone has fewer than 50 submergence days per year. These sites have siltier soils, better soil-moisture values. and greater biomass. DISR,ZEL.I. D. J.. et R. W. FONDA. 1979. Gfirdicnt :rnalysisof the vegetation in a brackish marsh in Bellingham Bay, Washington. Can. J . Bot. 57: 465-475. Les iles du delta du f l e~~v e Nooks21ck soutiennent L I~ m:rrais Lln peu sale. dont In plus grand salinite est d e 5.18 ppt. Pendant les hautes marees le m a~r i s est inondk pal-I'euu ~L I fleuve, plutdt que par celle d e la baie Bellingharn. Les especes du m a x i s sont distl.ibuees selon les comhin:risons d e I'altitude. la d~l r e e d e la submersion d e maree, le contenu de sable et d e limon du sol et I'humidite d e sol. Deux larges zones m n r e c a g e~~s e s ont ete reconnues. Le mafiris B Sci,prrs ~I I I~~,~~L .~I I I I I J se trouve ~ILI-dessous de274 cm :r~~-dessus de la moyenne minimum d e I'e:ru basse. ou il est submerge pendant presque toutes les m:u.ees hautes. II a plus d e 70jours d e submersion par ~I I . Les sols sont sableux mais ma1 drnines, et la biomnsse aerienne est basse. Le m a x i s ir Ccrrp.~ 1ytrghyc.i occupe des sites au-dessus d e 274 cm. Cette zone 21 moins d e 50jours d e submersion p:uan. Ces sitesont des sols plus limoneux. d e meilleures valeursd'humidit6 d e sol et d e plus glxndes biomasses.
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