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Adsorption and release of amino acids from epilithic biofilms in streams
Author(s) -
MARMSTRONG STEPHEN,
BÄRLOCHER FELIX
Publication year - 1989
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1989.tb01090.x
Subject(s) - amino acid , glycine , adsorption , lysine , aspartic acid , chemistry , sediment , biofilm , environmental chemistry , leachate , botany , biology , biochemistry , organic chemistry , bacteria , paleontology , genetics
SUMMARY. I. Stream sediment with a natural biofilm generally adsorbed more glycine, aspartic acid, and lysine than sterile sediment. Lysine was adsorbed to a greater extent than the other two amino acids. 2. In the presence of Ca 2+ , adsorption of aspartic acid increased and adsorption of lysine decreased. Glycine was not affected. 3. Stream sediment preferentially removed amino acids with a positive charge or a polar R group from maple leaf leachate. 4. It is estimated that stream invertebrates may have access to a maximum of 7.3% of the amino acids present in epilithic biofilms. More amino acids were available from biofilms exposed to leaf leachate.