Chlorophyll a as a measure of seasonal coupling between phytoplankton and the monsoon periods in the Gulf of Oman

Adnan R. Al-Azri, Sergey A. Piontkovski, Khalid A. Al-Hashmi, Joaquim I. Goes, Helga R. do Gomes

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We present data from a long time-series study to describe the factors that control phytoplankton population densities and biomass in the coastal waters of Oman. Surface temperature, salinity, nutrients, dissolved oxygen, chlorophyll a (Chl a), and phytoplankton and zooplankton abundance of sea water were measured as far as possible from February 2004 through February 2006, at two stations along the southern coast of the Gulf of Oman. The highest concentrations of Chl a (3 mg m-3) were recorded during the southwest monsoon (SWM) when upwelling is active along the coast of Oman. However, results from our study reveal that the timing and the amplitude of the seasonal peak of Chl a exhibited interannual variability, which might be attributed to interannual differences in the seasonal cycles of nutrients caused either by coastal upwelling or by cyclonic eddy activity. Monthly variability of SST and concentrations of dissolved nitrate, nitrite, phosphate, and silicate together explained about 90% of the seasonal changes of Chl a in the coastal ecosystem of the Gulf of Oman. Phytoplankton communities of the coastal waters of Oman were dominated by diatoms for most part of the year, but for a short period in summer, dinoflagellates were dominant.

Original languageEnglish
Pages (from-to)449-461
Number of pages13
JournalAquatic Ecology
Volume44
Issue number2
DOIs
Publication statusPublished - 2010

Fingerprint

Oman
chlorophyll a
monsoon
phytoplankton
chlorophyll
coastal water
upwelling
nutrient
coast
coasts
dinoflagellate
Bacillariophyceae
nitrite
dissolved oxygen
population density
silicates
zooplankton
eddy
surface temperature
diatom

Keywords

  • Monsoon winds
  • Noctiluca scintillans
  • Nutrients
  • Zooplankton

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics

Cite this

Chlorophyll a as a measure of seasonal coupling between phytoplankton and the monsoon periods in the Gulf of Oman. / Al-Azri, Adnan R.; Piontkovski, Sergey A.; Al-Hashmi, Khalid A.; Goes, Joaquim I.; do Gomes, Helga R.

In: Aquatic Ecology, Vol. 44, No. 2, 2010, p. 449-461.

Research output: Contribution to journalArticle

Al-Azri, Adnan R. ; Piontkovski, Sergey A. ; Al-Hashmi, Khalid A. ; Goes, Joaquim I. ; do Gomes, Helga R. / Chlorophyll a as a measure of seasonal coupling between phytoplankton and the monsoon periods in the Gulf of Oman. In: Aquatic Ecology. 2010 ; Vol. 44, No. 2. pp. 449-461.
@article{c837aa15fc6d4732bc28d9c1b5b37c22,
title = "Chlorophyll a as a measure of seasonal coupling between phytoplankton and the monsoon periods in the Gulf of Oman",
abstract = "We present data from a long time-series study to describe the factors that control phytoplankton population densities and biomass in the coastal waters of Oman. Surface temperature, salinity, nutrients, dissolved oxygen, chlorophyll a (Chl a), and phytoplankton and zooplankton abundance of sea water were measured as far as possible from February 2004 through February 2006, at two stations along the southern coast of the Gulf of Oman. The highest concentrations of Chl a (3 mg m-3) were recorded during the southwest monsoon (SWM) when upwelling is active along the coast of Oman. However, results from our study reveal that the timing and the amplitude of the seasonal peak of Chl a exhibited interannual variability, which might be attributed to interannual differences in the seasonal cycles of nutrients caused either by coastal upwelling or by cyclonic eddy activity. Monthly variability of SST and concentrations of dissolved nitrate, nitrite, phosphate, and silicate together explained about 90{\%} of the seasonal changes of Chl a in the coastal ecosystem of the Gulf of Oman. Phytoplankton communities of the coastal waters of Oman were dominated by diatoms for most part of the year, but for a short period in summer, dinoflagellates were dominant.",
keywords = "Monsoon winds, Noctiluca scintillans, Nutrients, Zooplankton",
author = "Al-Azri, {Adnan R.} and Piontkovski, {Sergey A.} and Al-Hashmi, {Khalid A.} and Goes, {Joaquim I.} and {do Gomes}, {Helga R.}",
year = "2010",
doi = "10.1007/s10452-009-9303-2",
language = "English",
volume = "44",
pages = "449--461",
journal = "Netherlands Journal of Aquatic Ecology",
issn = "1380-8427",
publisher = "Springer Netherlands",
number = "2",

}

TY - JOUR

T1 - Chlorophyll a as a measure of seasonal coupling between phytoplankton and the monsoon periods in the Gulf of Oman

AU - Al-Azri, Adnan R.

AU - Piontkovski, Sergey A.

AU - Al-Hashmi, Khalid A.

AU - Goes, Joaquim I.

AU - do Gomes, Helga R.

PY - 2010

Y1 - 2010

N2 - We present data from a long time-series study to describe the factors that control phytoplankton population densities and biomass in the coastal waters of Oman. Surface temperature, salinity, nutrients, dissolved oxygen, chlorophyll a (Chl a), and phytoplankton and zooplankton abundance of sea water were measured as far as possible from February 2004 through February 2006, at two stations along the southern coast of the Gulf of Oman. The highest concentrations of Chl a (3 mg m-3) were recorded during the southwest monsoon (SWM) when upwelling is active along the coast of Oman. However, results from our study reveal that the timing and the amplitude of the seasonal peak of Chl a exhibited interannual variability, which might be attributed to interannual differences in the seasonal cycles of nutrients caused either by coastal upwelling or by cyclonic eddy activity. Monthly variability of SST and concentrations of dissolved nitrate, nitrite, phosphate, and silicate together explained about 90% of the seasonal changes of Chl a in the coastal ecosystem of the Gulf of Oman. Phytoplankton communities of the coastal waters of Oman were dominated by diatoms for most part of the year, but for a short period in summer, dinoflagellates were dominant.

AB - We present data from a long time-series study to describe the factors that control phytoplankton population densities and biomass in the coastal waters of Oman. Surface temperature, salinity, nutrients, dissolved oxygen, chlorophyll a (Chl a), and phytoplankton and zooplankton abundance of sea water were measured as far as possible from February 2004 through February 2006, at two stations along the southern coast of the Gulf of Oman. The highest concentrations of Chl a (3 mg m-3) were recorded during the southwest monsoon (SWM) when upwelling is active along the coast of Oman. However, results from our study reveal that the timing and the amplitude of the seasonal peak of Chl a exhibited interannual variability, which might be attributed to interannual differences in the seasonal cycles of nutrients caused either by coastal upwelling or by cyclonic eddy activity. Monthly variability of SST and concentrations of dissolved nitrate, nitrite, phosphate, and silicate together explained about 90% of the seasonal changes of Chl a in the coastal ecosystem of the Gulf of Oman. Phytoplankton communities of the coastal waters of Oman were dominated by diatoms for most part of the year, but for a short period in summer, dinoflagellates were dominant.

KW - Monsoon winds

KW - Noctiluca scintillans

KW - Nutrients

KW - Zooplankton

UR - http://www.scopus.com/inward/record.url?scp=77952422677&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77952422677&partnerID=8YFLogxK

U2 - 10.1007/s10452-009-9303-2

DO - 10.1007/s10452-009-9303-2

M3 - Article

VL - 44

SP - 449

EP - 461

JO - Netherlands Journal of Aquatic Ecology

JF - Netherlands Journal of Aquatic Ecology

SN - 1380-8427

IS - 2

ER -