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Comparing taxonomic and morphological biodiversity of tintinnids (planktonic ciliates) of New Caledonia
Author(s) -
Dolan J. R.,
Jacquet S.,
Torréton J.-P.
Publication year - 2006
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.2006.51.2.0950
Subject(s) - biology , plankton , ciliata , ecology , biodiversity , ciliate , global biodiversity , fauna , cladocera , phytoplankton , diversity index , species diversity , zoology , zooplankton , protozoa , species richness , botany , nutrient
Tintinnid ciliates are planktonic grazers of nanoplankton. They have a lorica (or shell) into which the ciliate cell can withdraw. The lorica provides information on both the identity and the ecology of the organism because characteristics of the lorica distinguish species and the diameter of the oral opening is related to the size of prey ingested. We examined the relationship between biodiversity estimates on the basis of classifying specimens as belonging to a species or a simple morphological group defined by lorica oral diameter (LOD) in a presumably species‐rich area, a tropical lagoon. Two sites were sampled in the lagoon off NoumeÁa over an annual cycle. The tintinnid fauna was species‐rich (76 species) and represented a relatively even distribution of LOD sizes compared to other tropical and temperate sites. Median LOD varied with the fraction of the chlorophyll concentration by >10 µm. Total chlorophyll concentration was related to tintinnid concentration and, in turn, weakly correlated with numbers of species and LOD size‐classes. Numbers of species were closely related to numbers of LOD size‐classes as were H‘ of species and H‘ (Shannon index) of LOD size‐classes. Thus, metrics of a morphological characteristic, related to the ecology of the organisms, can be used to estimate species diversity.