Publication details.

Paper

Year:2014
Author(s):Font-Muñoz J.S., Jordi A, Anglès S, Basterretxea G
Title:Estimation of phytoplankton size structure in coastal waters using simultaneous laser diffraction and fluorescence measurements.
Journal:JOURNAL OF PLANKTON RESEARCH
ISSN:0142-7873
JCR Impact Factor:2.407
Volume:37
Issue No.:4
Pages:740-751
D.O.I.:10.1093/plankt/fbv041
Web:http://plankt.oxfordjournals.org/
Abstract:
The size structure of phytoplankton reveals relevant information on the structure and response of aquatic systems to
environmental drivers. To estimate the phytoplankton size distribution, we combined simultaneous particle size mea-
surements obtained with a laser in situ scattering and transmissometry instrument (LISST) and fluorescence profiles
using canonical correlation analysis (CCA). We tested the performance of this method with a series of synthetic la-
boratory samples generated by mixing cultured phytoplankton cells and natural sediments with grain sizes within the
size range of phytoplankton. Our results revealed that the method yields reliable estimation of the algal fraction allow-
ing the discrimination of phytoplankton size distribution when algal cells constitute .25% of total suspended particu-
late matter. Uncertainties arise in very turbid waters and when samples are composed of two phytoplankton species
with very different contribution to chlorophyll in terms of cell size. Application of the proposed method in a survey of
37 stations carried out in Palma Bay (Mediterranean Sea) effectively represented the patterns of four main size frac-
tions dominating coastal phytoplankton biomass, demonstrating the utility of the method. Compared to previous pub-
lished methods, the proposed method is more robust because it is not impeded by the presence of non-algal
components.

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