%0 Journal Article
%T Changes in biomass, chemical composition and nutritive value of Spartina alterniflora due to organic pollution in the Itanha¨¦m River Basin (SP, Brazil)
%A Biudes
%A J. F. V.
%A Camargo
%A A. F. M.
%J Brazilian Journal of Biology
%D 2006
%I Scientific Electronic Library Online
%R 10.1590/S1519-69842006000500003
%X we compared the values of the biomass, chemical composition and nutritive value of the emergent aquatic macrophyte s. alterniflora in a river affected by the discharge of domestic sewage (gua¨² river) and in an unpolluted river (itanha¨¦m river). s. alterniflora, water and sediment samples were obtained in the two rivers in november, 2001. the gua¨² river presented the highest levels of total-n and total-p in the water (415 and 674 ¦̀g.l-1, respectively) and in the sediment (0.25 e 0.20% of the dry mass, respectively), when compared to the water (tn = 105 ¦̀g.l-1; tp = 20 ¦̀g.l-1) and the sediment (nt = 0.12% dm; pt = 0.05% dm) of the itanha¨¦m river. aerial (316 g dm.m-2) and subterraneous (425 g dm.m-2) biomass of s. alterniflora were significantly higher in the gua¨² river than in the itanha¨¦m river (146 and 115 g dm.m-2, respectively). in addition, the values of tn, protein, tp, lipids and soluble carbohydrates were significantly higher in s. alterniflora biomass from the gua¨² river. on the other hand, the values of the polyphenols and the cell wall fraction were significantly higher in the biomass of s. alterniflora from the itanha¨¦m river. we concluded that domestic sewage discharge in water bodies may increase the biomass and change the chemical composition of s. alterniflora. the high n and p availability in the water of the gua¨² river is probably the cause of the higher biomass, tn, tp, protein, lipids and soluble carbohydrates measured in s. alterniflora in this river.
%K biomass
%K chemical composition
%K nutritive value
%K spartina alterniflora.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1519-69842006000500003&lng=en&nrm=iso&tlng=en