Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Help
Clear All

Query Builder

Query box

Help
Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Annual patterns, distribution and long-term trends of Pseudo-nitzschia species in the northern Benguela upwelling system

Filetype[PDF-1.02 MB]


Details You May Also Like

Details:

  • Journal Title:
    Journal of Geophysical Research: Atmospheres
  • Personal Author:
  • NOAA Program & Office:
  • Description:
    Phytoplankton data obtained from a 14-year data set off the coast of Namibia were analysed. The temporal distribution of species belonging to the diatom genus, Pseudo-nitzschia, was examined using samples collected quasi-monthly at onshore and offshore locations. This data set revealed that Pseudo-nitzschia blooms occurred sporadically along the central coast of Namibia, and cell concentrations frequently exceeded 200 000 cells L-1, with levels close to or exceeding 1 000 000 cells L-1 noted occasionally. Two relatively cold years (2005 and 2010) and three relatively warm years (2001, 2003 and 2011) were found to be exceptional for high biomass Pseudo-nitzschia blooms, so possible drivers (wind, temperature and nutrients) were evaluated. Pseudo-nitzschia species abundance was associated with moderate temperature (13-16 degrees C) and nutrient conditions. Climatology showed an increase in Pseudo-nitzschia blooms during austral summer, reaching a maximum in May, June or July. These blooms seem to initiate following periods of high total phytoplankton concentrations. Wind was determined to play an important role in controlling these blooms. Low biomass Pseudo-nitzschia blooms were observed during months with high or irregular winds that coincided with periods of upwelling, whereas high biomass blooms were associated with the decrease of wind after the main wind peak at the end of summer.
  • Source:
    Journal of Plankton Research, 39(1), 35-47.
  • DOI:
  • Document Type:
    Journal Article
  • Compliance:
    Submitted
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files

More +

You May Also Like

Checkout today's featured content at repository.library.noaa.gov

Version 3.26