English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The composition and dynamics of phytoplankton assemblages during the spring bloom in a shallow, coastal-plain estuary were characterized by high-performance liquid chromatography (HPLC)-derived pigment profiles. From mid-February through the first week in June 1991, samples were collected twice weekly at 2 sites within the Newport River estuary, North Carolina, USA. Pigment profiles, reflecting phytoplankton assemblages dominated by diatoms, dinoflagellates, prymnesiophytes, cryptophytes, and chlorophytes, were compared to phytoplankton cell counts. There were significant (p 5 0.0005, r2 = 0.49 to 0 63) relationsh~ps between the taxon-specific pigment concentrations and the taxon-specific cell numbers HPLC-determined chlorophyll (chl) a biomass corresponded wlth the sum of the taxon-spec~fic hl a biomass (p S 0.001, r2 = 0.95). Each taxon-specific biomass was calculated based on chl a:accessory pigment ratlos determined by regression analyses. Chl a biomass was also measured fluorometr~cally and compared with the HPLC results. Fluorometric analysis underestimated bio~nass when prymnesiophytes, cryptophytes, and chlorophytes dominated the phytoplankton. Despite the inherent environmental vanability of the estuarine sampling location, HPLC-derived pigment profiles did provide division-level phylogenetic assessment of large, short-term changes in the phytoplankton composition and detected assemblage responses to event-scale perturbation effects (e .g . precipitation, wind). These results demonstrate that even in highly variable environments HPLCbased pigment analysis is a valuable tool, providing complementary information to the traditional methodology of cell counting.

Evaluating phytoplankton dynamics in the Newport River estuary (North Carolina, USA) by HPLC-derived pigment profiles