Seasonal Dynamics of Microphytobenthos Biomass and Photosynthetic Characteristics in the Northern German Wadden Sea, Obtained by the Photosynthetic Light Dispensation System

Wolfstein, K.; Colijn, F.; Doerffer, R.

doi:10.1006/ecss.2000.0702

Cited by 39 publications

(28 citation statements)

References 38 publications

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“…3). Spatial differences in seasonal trends in the development of microphytobenthic assemblages have been previously reported (Wolfstein et al 2000). Several authors have reported summer peaks similar to our study (de Jonge & de Jonge 1995, Montani et al 2003.…”

Section: Distribution and Seasonal Development Of Microphytobenthos Bsupporting

confidence: 90%

“…Several authors have reported summer peaks similar to our study (de Jonge & de Jonge 1995, Montani et al 2003. In contrast, others observed spring-early summer peaks and a subsequent decline in June or August due to grazing of benthic invertebrates and resuspension events (Cariou-Le Gall & Blanchard 1995, Wolfstein et al 2000. Late winter peaks, as reported for other tidal flats (Montani et al 2003), were not observed in our study.…”

Section: Distribution and Seasonal Development Of Microphytobenthos Bsupporting

confidence: 81%

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Microphytobenthos seasonality determines growth and reproduction in intertidal bivalves

Kang¹,

Lee²,

Choy³

et al. 2006

Mar. Ecol. Prog. Ser.

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The annual cycles of phytoplanktonic and microphytobenthic biomasses as food sources for intertidal bivalves were investigated in a temperate estuarine muddy sandflat of Kwangyang Bay (Korea) from January to December 2002. Seasonal patterns in growth and reproductive activity of a suspension-feeder Laternula marilina and a deposit-feeder Moerella rutila were examined in order to assess their relationship with the annual cycles of pelagic and benthic microalgae, and were combined with analyses of δ 13 C and δ 15 N of bivalve tissues and their potential food resources. Biomasses of phytoplankton and microphytobenthos peaked in late spring-summer, and demonstrated a unimodal pattern of seasonal variation. Photosynthetic pigment composition showed a predominance of diatom marker pigment, fucoxanthin, in the water and the sediments throughout the year. Similar patterns of annual cycles in pelagic and benthic microalgal biomasses and similarities in taxonomic composition indicated that resuspended microphytobenthos is an important contributor to the bay's phytoplankton component. This was supported by the δ 13 C values of suspended particulate organic matter (POM) and physical characteristics of the bay. Synchrony in growth and reproductive activity was observed for both bivalves: their shell and tissue growth and gonadal development were achieved together during late spring and summer when chlorophyll a (chl a) concentrations were highest. This temporal coupling of macrofaunal and microalgal processes indicated that the activities of intertidal bivalves might depend largely on microphytobenthos seasonality. The isotopic signatures of the bivalve tissues demonstrated their dependence on organic matter of microphytobenthic source irrespective of season, despite a comparable contribution of phytoplankton to the diet of the suspension-feeding bivalve. These results highlight the importance of seasonal development of microphytobenthos as an available food source during the critical period of gamete production and growth for both suspension-and deposit-feeding bivalves.

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Section: Distribution and Seasonal Development Of Microphytobenthos Bsupporting

confidence: 90%

Section: Distribution and Seasonal Development Of Microphytobenthos Bsupporting

confidence: 81%

Microphytobenthos seasonality determines growth and reproduction in intertidal bivalves

Kang¹,

Lee²,

Choy³

et al. 2006

Mar. Ecol. Prog. Ser.

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“…Our methods were similar to those used in the Seine Estuary, and we estimated the intertidal benthic GCP value (derived over 19 monthly measurements) as being only 10.27 g C m −2 yr −1 during emersion. The annual GCP value observed in the subtropical Kaomei Wetland was only about 10% of the values reported for temperate and tropical regions as estimated by Cahoon (1999), but was within the range reported for the northern German Wadden Sea (Wolfstein et al 2000). In the Kaomei Wetland, sediment chl a concentrations were 1.92 to 99.71 mg m , and in the Seine Estuary of France, Spilmont et al (2006) reported that sediment chl a concentrations ranged from 69 to 277 mg m −2 .…”

Section: Discussionsupporting

confidence: 70%

“…On intertidal flats in the Ems−Dollard Estuary, Colijn & de Jonge (1984) found that annual primary production of benthic microalgae ranged from 50 to 250 g C m −2 and was closely related to elevation of the tidal flat. Wolfstein et al (2000) reported wide variations in primary production of benthic microalgae in the northern German Wadden Sea (0.10 to 163.8 g C m ). In the Seine Estuary of France, the potential GCP of intertidal benthic microalgae was estimated to be 135 g C m −2 yr −1 (Spilmont et al 2006).…”

Section: Discussionmentioning

confidence: 99%

In situ production and respiration of the benthic community during emersion on subtropical intertidal sandflats

Lee¹,

Hsieh²,

Lin³

2011

Mar. Ecol. Prog. Ser.

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In situ benthic community production and respiration during emersion were measured monthly in the course of a 19 mo survey from June 2008 to December 2009 by monitoring CO(2) fluxes in benthic chambers on intertidal sandflats of a subtropical coastal wetland. Maximum gross community production (GCP(m)) and community respiration (CR) all exhibited higher values in summer and fall and lower values in spring and winter. GCP(m) and CR were positively correlated with air temperature. Temperature coefficients (Q(10)) showed that a rise of 10 degrees C would increase the GCP(m) and CR by factors of 3.72 and 4.80, respectively. GCP(m) was also positively correlated with sediment grain size and negatively correlated with the silt/clay content. CR exhibited a strong positive correlation with sediment chlorophyll a concentration and macrofaunal biomass. To provide an accurate annual budget of benthic production during emersion, corrections were considered for cloudiness and the time lag between emersion and maximum production due to vertical migration of benthic diatoms and variations in CR during nighttime emersion periods. Annual net community production (NCP) during emersion on sandflats was estimated to be 2.87 g C m(-2) yr(-1), indicating an autotrophic system. However, taking into account the variation in benthic metabolism during immersion, the subtropical intertidal sandflats shifted to a heterotrophic system, and annual NCP was calculated to be -91.47 g C m(-2) yr(-1)

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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]supporting

confidence: 79%

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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Seasonal Dynamics of Microphytobenthos Biomass and Photosynthetic Characteristics in the Northern German Wadden Sea, Obtained by the Photosynthetic Light Dispensation System

Cited by 39 publications

References 38 publications

Microphytobenthos seasonality determines growth and reproduction in intertidal bivalves

Microphytobenthos seasonality determines growth and reproduction in intertidal bivalves

In situ production and respiration of the benthic community during emersion on subtropical intertidal sandflats

Coupling between Photosystem II electron transport and carbon fixation in microphytobenthos

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