Accessible Requires Authentication Published by De Gruyter May 17, 2017

Cystoseira scale-based biometric relationships

Sotiris Orfanidis, Ljiljana Iveša, Stefanos Gounaris, Soultana Tsioli, Massimo Devescovi and Vasilis Papathanasiou
From the journal Botanica Marina


Scale-based biometric relationships of Cystoseira species were studied. All of the allometric relationships between size and biomass were significant (p<0.001) and volume [estimated as the product of length (L) and circumference-squared (C2)] was a better predictor of both wet biomass (WB) and dry biomass (DB) than L. The allometric exponent of the relationship between L and DB for five Cystoseira species (0.238–0.297) was found to be close to the allometric exponent suggested to be universal for primary producers (0.25). The relationship between Cystoseira spp. coverage (%; estimated in the laboratory for each species harvested within a reference quadrat in vertical projection) and WB was best expressed by a power function, while that between photographic cover (%; estimated in the field) and WB was asymptotic at 100% cover. The relationships between cover (%) (CVr) and coverage (%) (CVe) with WB pooled from an independent dataset were polynomial with comparable values up to 120 g WB. ANCOVA showed species-specific (e.g. between biomass and size) and species-independent (e.g. between biomass and coverage/cover, between DB and WB, and between DB and organic matter) relationships, indicating that non-destructive sampling in the genus is feasible when species and parameter are taken into account.


Sotiris Orfanidis expresses his thanks to Mrs. Konstantinia Nakou for her technical assistance in the laboratory. Thanks are due to Emeritus Professor Christos Katsaros and Dr. Annalisa Falace for their critical comments on an earlier draft of this text. We are very grateful to Prof. Matt Dring, Editor in Chief of Botanica Marina, for his time to review this paper. The authors would also like to acknowledge networking support by the COST Action “Phycomorph” FA1406.


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Received: 2017-3-7
Accepted: 2017-4-21
Published Online: 2017-5-17
Published in Print: 2017-5-24

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