Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 430721
Title Long-term mean annual microphytobenthos chlorophyll a variation correlates with air temperature
Author(s) Jonge, V.N. de; Boer, W.F. de; Jong, D.J. de; Brauer, V.S.
Source Marine Ecology Progress Series 468 (2012). - ISSN 0171-8630 - p. 43 - 56.
Department(s) Resource Ecology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) ems-dollard estuary - northern wadden sea - intertidal microphytobenthos - severe winter - diatom populations - crangon-crangon - benthic diatoms - growth-rate - tidal-flat - phytoplankton
Abstract Long-term interannual variations in the mean microphytobenthos chlorophyll a (chl a) of the Ems estuary were investigated. Concentrations in the 1990s were on average 1.5 times higher than during the period from 1976 to 1978, but a trend in chl a over the entire period (1976 to 1999) was not found. In agreement with findings from the late 1970s, the mean chl a concentrations over the post 1990 period correlated significantly with the station elevation related exposure time. Over the entire 1976 to 1999 study period, the estuary mean annual chl a concentrations correlated strongly and significantly with the mean annual air temperature. Although the range of the variation in the mean annual air temperature of the studied years was only 7.5 to 10.2°C, it surprisingly corresponded with a ca. 2.5-fold variation in the mean annual microphytobenthos chl a. In addition to chl a, mean monthly C:chl a ratios from 1976 to 1977 also correlated positively with changes in temperature. Microphytobenthos carbon biomass [chl a × (C:chl a)] may, therefore, respond even stronger to air temperature than chl a does. The correlations are most likely a combination of direct temperature effects on microphytobenthos and stronger, probably complex, indirect temperature effects on the seasonal development and standing stock of young and adult grazers (bivalves) and their carnivores like the brown shrimp Crangon crangon.
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