Field measurement of specific growth rate, biomass, and primary production of benthic diatoms of Savin Hill Cove, Boston

Gould, Diane; Gallagher, Eugene D.

doi:10.4319/lo.1990.35.8.1757

Cited by 58 publications

(36 citation statements)

References 29 publications

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“…Admiraal et al 1983). However, despite calculations presented by Montagna (1984) and Gould & Gallagher (1990), it IS improbable that mainly grazers and burrowers are responsible for the some- results indicate that wind-induced waves are far more important than tidal currents. Thus, wind-induced waves are the main cause of resuspension, whereas light conditions [related to station elevation (Admiraal & Peletier 1980), solar radiation and water turbidity (Colijn 1983, p. 104)] are responsible for rnicrophytobenthos growth, as reported by Colijn & d e Jonge (1984).…”

Section: Processes Controlling Temporal Dynamicsmentioning

confidence: 91%

“…The method developed by Banse (1977) cannot be applied to sediment-inhabiting algae in the Ems estuary because the living algae represent only a very small fraction of the total organic carbon (de Jonge 1979). Until very recently (Gould & Gallagher 1990) labelhng of chl a with I4C to determine microphytobenthos biomass was little used. For calculation of assimilation numbers (PB,,,,,) and for comparisons between areas, a biomass parameter, chl a, is often used.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of microphytobenthos biomass in the Ems estuary

Jonge¹,

Colijn²

1994

Mar. Ecol. Prog. Ser.

121

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The temporal dynamics of benthic chlorophyll a (chl a ) in the Ems estuary (The Netherlands, NW Europe) were studied over ca 3 yr at 6 stations. The mean annual concentrations of chl a ranged from 28.6 to 247.0 mg m-' in the top 0.5 cm of sediment. The relative vertical distribution of chl a in the sediment revealed a profile which was slrnilar for 5 of the 6 stations This distribution of chl a, representing vital cells, was reconstructed from typical vertical distnbuhons of chl a including the denvatives with a n absorption peak at the same wavelength. The graphs were converted and used to calculate the total biomass of the microphytobenthos expressed as organic carbon. The lowest value of the mean annual biomass of inicrophytobenthos per station was 3.1 g C m-', and the highest was 16.7 g C m-' Average values over the total period investigated ranged from 3.2 to 11.0 g C m-2. With one exception where a value of 0.6 was calculated, the ratio between the biomass from the 0.5 to 2.0 cm sedlrnent layer and that from the 0 to 2 cm sediment layer was fairly constant (0.40 to 0.47). This illustrates that sampling only the top 0 5 cm of the sediment to determine the microphytobenthos chl a and multiply~ng t h~s value by the corresponding C/chl a ratio results in the carbon biomass being grossly (40 to 60%) underestimated. The use of a n incorrect C/chl a ratio (which vaned between 40 and 61 dunng the study period) in this calculation can increase thls deviation by a further 5 0 % KEY WORDS blicrophytobenthos biomass . Chlorophyll a . Carbon . Carbon to chlorophyll a ratlo (C/chl a) . Ems estuary .

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Section: Processes Controlling Temporal Dynamicsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Dynamics of microphytobenthos biomass in the Ems estuary

Jonge¹,

Colijn²

1994

Mar. Ecol. Prog. Ser.

121

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“…Although grazing by benthic macrofauna is well known (Andersen & Kristensen 1988, Gould & Gallagher 1990, little is known about the rate of grazing. In 1974 and 1975 the m.acrofauna in th.e area near the mouth of the river LiWA was nearly absent; only low numbers of the ragworm Nereis diversicolor, the tellinid, bivalve Macoma baltica and the amphipod Corophium volutator were present (Van Es et al 1980).…”

Section: Regulation Of Rnicrophytobenthic Biomassmentioning

confidence: 99%

Long-term changes in intertidal estuarine diatom assemblages related to reduced input of organic waste

Peletier¹

1996

Mar. Ecol. Prog. Ser.

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A comparison is made of the species composition and density of benthic diatoms of an intertidal brackish mudflat in the Ems-Dollard estuary (NetherlanddGermany) under conditions of high (1977 to 1980) and reduced (1987 to 1993) organic waste input from the river LVesterwoldsche Aa. During the observation period (1977 to 1993) the epipelic diatom population on the mudflat was composed of only a limited number of species. From 1977 to 1980. every year broadly the same spatial and temporal patterns of the sediment-inhabiting diatoms were found, viz, an alternating dominance of Navjcula s a l~n a r u n~ and N. pygmaea. In 1993 this pattern had disappeared and A' phyllepta and N tlanatjca, specles with a lower tolerance to high ammonium and sulphide concentrations, were the d o n~i -nant species. This change could be attr~buted to a reduction of organic waste input. The declining abundance of N. pygmaea was probably also partly caused by the decreased abundance of the nematode Eudiplogastcr pararmatus, a n indicator of organic enrichment. In 1987 and 1993, the diatom populations on the mudflat showed density maxima in spring and late autumn, in contrast with the period 1976 to 1977, during which values were high (over 100 mg chlorophyll a m-2) during a large part of the year, not showing any spring 01-autumn bloon~. The d~fference in the development of microphytobenthos biomass was probably caused by the increasing numerical densities of the macrofaunal diatom grazers Nereis diversicolor and Corophium volutator, causcd by the reduction of the organic waste.

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“…, growth rates, and photosynthetic parameters observed during the growth of the experimental MPB assemblage were representative of the ranges of values reported in the literature for natural MPB assemblages (Gould & Gallagher 1990, Underwood & Kromkamp 1999, Wolfstein et al 2000.…”

Section: Sediment [Chl A]mentioning

confidence: 51%

Coupling between Photosystem II electron transport and carbon fixation in microphytobenthos

Morris¹,

Forster²,

Peene³

et al. 2008

Aquat. Microb. Ecol.

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Photosynthetic parameters of a microphytobenthic (MPB) biofilm grown in a tidal mesocosm were measured on undisturbed sediment using variable fluorescence-based measurements of electron transport rate (ETR), as well as by ETR and 14 C assimilation measurements in optically thin suspensions of algal cells. Absorption cross-sections of the MPB suspensions were quantified using the quantitative filter technique and by reconstruction using HPLC-derived pigment concentrations. Photosynthetic parameters derived by the 3 methods were compared on 3 days, representing different biofilm growth/[chl a ] conditions, at the start, middle and end of the daytime tidal emersion. Comparisons of ETR and radioisotope-derived photosynthetic parameters measured on optically thin suspensions were not significantly different, confirming that with an appropriate estimation of the irradiance absorbed by Photosystem II (PSII), under optically well-defined conditions, variable fluorescence is a reliable measure of MPB photosynthetic rates. In contrast, significant differences of up to 60% were observed between the maximum photosynthetic capacity (P B max ) measured on undisturbed sediment and in suspensions. These differences were observed at high [chl a] (coinciding with low growth rates) towards the end of emersion periods. Comparison of the effective quantum efficiency (ΔF/F m ') at the highest light steps of photosynthetic-irradiance (P-E) curves suggested that the overestimation was due to the poor definition of the complex sediment optics, which interacted presumably with photo-taxis and/or single species migrations. Definition of the optics within undisturbed sediments, particularly considering the complex effects of migration, is a serious challenge, limiting the application of variable fluorescence techniques in situ on undisturbed sediments.KEY WORDS: Variable fluorescence · 14 C uptake · Microphytobenthos · Maximum photosynthetic capacity · Maximum quantum yield of photosynthesis · Sediment · Absorption cross-section · PAM fluorescence Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 50: [301][302][303][304][305][306][307][308][309][310][311] 2008 with their own specific advantages and disadvantages (reviewed by Underwood & Kromkamp 1999). In situ tracer incubations measure the fixation of 13 C or 14 C from bicarbonate solution applied to the sediment surface (Middelburg et al. 2000); however, calculations of fixation rates can be difficult due to the unknown specific activity of the tracer in the sediment pore water (Vadeboncoeur & Lodge 1998). This problem may be serious in cohesive sediments (Jonsson 1991), or in dense biofilms where drawdown of the porewater DIC pool is extremely fast and atmospheric CO 2 is the main inorganic carbon source. In contrast, photosynthetic measurements using suspensions of MPB cells in a medium (typically filtered seawater) can give useful information about photosynthetic characteristics under controlled temperature and irradiance cond...

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Field measurement of specific growth rate, biomass, and primary production of benthic diatoms of Savin Hill Cove, Boston

Cited by 58 publications

References 29 publications

Dynamics of microphytobenthos biomass in the Ems estuary

Dynamics of microphytobenthos biomass in the Ems estuary

Long-term changes in intertidal estuarine diatom assemblages related to reduced input of organic waste

Coupling between Photosystem II electron transport and carbon fixation in microphytobenthos

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