Spatial synchrony in intertidal benthic algal biomass in temperate coastal and estuarine ecosystems

Daphne van der Wal, Annette Wielemaker-van den Dool, P. M J Herman

Research output: Contribution to journalArticleAcademicpeer-review

36 Citations (Scopus)

Abstract

Microphytobenthos plays a vital role in estuarine and coastal carbon cycling and food webs. Yet, the role of exogenous factors, and thus the effects of climate change, in regulating microphytobenthic biomass is poorly understood. We aimed to unravel the mechanisms structuring microphytobenthic biomass both within and across ecosystems. The spatiotemporal distribution of the biomass of intertidal benthic algae (dominated by diatoms) was estimated with an unprecedented spatial extent from time-series of Normalized Differential Vegetation Index (NDVI) derived from a 6-year period of daily Aqua MODIS 250-m images of seven temperate, mostly turbid, estuarine and coastal ecosystems. These NDVI time-series were related to meteorological and environmental conditions. Intertidal benthic algal biomass varied seasonally in all ecosystems, in parallel with meteorology and water quality. Seasonal variation was more pronounced in mud than in sand. Interannual variation in biomass was small, but synchronized year-to-year biomass fluctuations occurred in a number of disjointed ecosystems. Air temperature explained interannual fluctuations in biomass in a number of sites, but the synchrony was mainly driven by the wind/wave climate: high wind velocities reduced microphytobenthic biomass, either through increased resuspension or reduced emersion duration. Spatial variation in biomass was largely explained by emersion duration and mud content, both within and across ecosystems. The results imply that effects on microphytobenthic standing stock can be anticipated when the position in the tidal frame is altered, for example due to sea level rise. Increased storminess will also result in a large-scale decrease of biomass.

Original languageEnglish
Pages (from-to)338-351
Number of pages14
JournalEcosystems
Volume13
Issue number2
DOIs
Publication statusPublished - 2010
Externally publishedYes

Fingerprint

estuarine ecosystem
Aquatic ecosystems
synchrony
Biomass
ecosystems
biomass
Ecosystems
emersion
ecosystem
algae
vegetation index
Time series
time series analysis
mud
coastal ecosystem
time series
Meteorology
duration
Bacillariophyceae
wave climate

Keywords

  • Inundation
  • Microphytobenthos
  • NDVI
  • Remote sensing
  • Spatial scales
  • Synchrony
  • ITC-ISI-JOURNAL-ARTICLE

Cite this

van der Wal, Daphne ; Wielemaker-van den Dool, Annette ; Herman, P. M J. / Spatial synchrony in intertidal benthic algal biomass in temperate coastal and estuarine ecosystems. In: Ecosystems. 2010 ; Vol. 13, No. 2. pp. 338-351.
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Spatial synchrony in intertidal benthic algal biomass in temperate coastal and estuarine ecosystems. / van der Wal, Daphne; Wielemaker-van den Dool, Annette; Herman, P. M J.

In: Ecosystems, Vol. 13, No. 2, 2010, p. 338-351.

Research output: Contribution to journalArticleAcademicpeer-review

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SN - 1432-9840

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