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Reassessment of exudation by fucoid macroalgae 1
Author(s) -
Carlson David J.,
Carlson Mary L.
Publication year - 1984
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1984.29.5.1077
Subject(s) - ascophyllum , algae , fucus , frond , desiccation , submersion (mathematics) , biology , botany , fucus vesiculosus , ecology , environmental chemistry , chemistry , mathematical analysis , mathematics , differentiable function
Dissolved organic materials (DOM) exuded by Ascophyllum nodosum and Fucus sp. were collected in situ by minimally disruptive techniques. Exposed macroalgae released relatively large amounts of DOM during the first several minutes of submersion and then exuded at slower rates. There was considerable day‐to‐day and within‐day variation in short term exudation, occasionally among fronds of single plants. Exudation was not consistently related to desiccation of the algae. Average exudation was calculated to be ≈1 g C · m −2 substratum · d −1 , only 2–5% of daily production by the macroalgae.