Photosynthetic Behaviour in Stratified and Unstratified Lake Populations of a Planktonic Diatom

Talling, J. F.

doi:10.2307/2257661

Cited by 58 publications

(31 citation statements)

References 57 publications

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“…Our values (1.5-11 ug. mm -3) are in agreement with those reported previously (Talling (1966): 4-5.3 ~tg. mm -3, Goldman (1978): 0.61-4.97, Foy (1987): 1-6, max.…”

Section: Distribution Of Phytoplankton and Photosynthetic Pigmentssupporting

confidence: 93%

Control of primary productivity and the significance of photosynthetic bacteria in a meromictic kettle lake. Mittlerer Buchensee, West-Germany

Overmann

Tilzer

1989

Aquatic Science

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During 1986 planktonic primary production and controlling factors were investigated in a small (Ao = 11.8-103 m 2, Zmax = 11.5 m) meromictic kettle lake (Mittlerer Buchensee). Annual phytoplankton productivity was estimated to ca 120 gC. m -2. a -t (1,42 tC-lake 1. a-l). The marked thermal stratification of the lake led to irregular vertical distributions of chlorophylla concentrations (Chla) and, to a minor extent, of photosynthesis (Az). Between the depths of 0 to 6m low Chla concentrations (< 7mg. m -3) and comparatively high background light attenuation (kw = 0,525 m -~, 77 % of total attenuation due to gelbstoff and abioseston) was found. As a consequence, light absorption by algae was low (mean value 17,4 %) and self-shading was absent. Because of the small seasonal variation of Chla concentrations, no significant correlation between Chla and areal photosynthesis (ZA) was observed. Only in early summer (June-July) biomass appears to influence the vertical distribution of photosynthesis on a bigger scale. Around 8 m depth, low-light adapted algae and phototrophic bacteria formed dense layers. Due to low ambient irradiances, the contribution of these organisms to total primary productivity was small. Primary production and incident irradiance were significantly correlated with each other (r 2 = 0.68). Although the maximum assimilation number (Popt) showed a clear dependence upon water temperature (Qa0 = 2.31), the latter was of minor importance to areal photosynthesis.

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“…Our values (1.5-11 ug. mm -3) are in agreement with those reported previously (Talling (1966): 4-5.3 ~tg. mm -3, Goldman (1978): 0.61-4.97, Foy (1987): 1-6, max.…”

Section: Distribution Of Phytoplankton and Photosynthetic Pigmentssupporting

confidence: 93%

Control of primary productivity and the significance of photosynthetic bacteria in a meromictic kettle lake. Mittlerer Buchensee, West-Germany

Overmann

Tilzer

1989

Aquatic Science

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“…PmaX is the specific photosynthetic oxygen production rate specified consistently with the Arrhenius equation (Talling 1966) and min (L) is the light limitation function as a function of depth (z) and time (t) (described by Haldane kinetics, Megard et al 1984). In Eq.…”

Section: Dissolved Oxygen Simulationmentioning

confidence: 99%

Simulation of dissolved oxygen profiles in a transparent, dimictic lake

Stefan

Fang

Wright

et al. 1995

Limnology & Oceanography

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Thrush Lake is a small, highly transparent lake in northeastern Minnesota. From 1986 to 199 1, vertical profiles of water temperature, dissolved oxygen, chlorophyll a concentration, underwater light irradiance, and Secchi depths were measured at monthly intervals during the ice-free period. Average Secchi depth was 7.5 m. Metalimnetic oxygen maxima were observed every summer. The oxygen peaks were related to Chl a distribution and water transparency. A deterministic one-dimensional model was developed to simulate

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“…Vertical profiles of the DCMU-induced fluorescence response of natural phytoplankton have been related to the intensity of wind mixing (Harris, 1980b), and have been used to suggest the physiological consequences of Langmuir circulation (Vincent, 1980). Likewise, photosynthesis-irradiance curves have been determined for samples from different depths and the previous light-history of the phytoplankton inferred (Steemann Nielsen and Hansen, 1959;Talling, 1966;Tilzer and Goldman, 1978;Falkowski, 1980;Platt et al, 1982, Gallegos et al, in press); for changes in photosynthetic performance, the characteristic time scale for change can be less than 12 h up to several d (Steemann Nielsen et. al.…”

Section: (15)mentioning

confidence: 99%

Relationships between vertical mixing and photoadaptation of phytoplankton: similarity criteria

Lewis¹,

Cullen²,

Platt³

1984

Mar. Ecol. Prog. Ser.

194

121

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In their natural environment, phytoplankton are exposed to fluctuations in incident irradiance due to vertical displacements in the water column induced by turbulent fluid motion. Physiological adaptation to these fluctuations results in variation in a number of measurable quantities (e.g. parameters of P-I curves, fluorescence yield, chemical composition), each of which have different time-scales of adaptation. A reaction-diffusion model is analyzed to determine the physical conditions under which a given physiological adaptation would be of ecological importance and thus may show variation in the photoadaptive variable with depth in a mixing layer. Two non-dimensional numbers control the dynamics. KJP2y expresses the ratio of the mixing rate to the photoadaptation rate (K, is the eddy diffusion coefficient, l' is the mixing length, and y is the photoadaptation rate constant for given variable). k,t' is the ratio of the mixing length scale to the optical length scale (k, is the attenuation coefficient for scalar irradiance). When KJP2y is low and k,P is high, photoadaptation proceeds fast enough to create variations in depth in the photoadaptive variable and conversely, when &/P&( is high and k,t' is low, turbulent fluid motion dissipates any depth variation. By observing the variation in depth of several photoadaptive variables, each with a different photoadaptation time-scale, the mixing rate of the water can be estimated. Data from laboratory and field experiments are used to illustrate applications.

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Photosynthetic Behaviour in Stratified and Unstratified Lake Populations of a Planktonic Diatom

Cited by 58 publications

References 57 publications

Control of primary productivity and the significance of photosynthetic bacteria in a meromictic kettle lake. Mittlerer Buchensee, West-Germany

Control of primary productivity and the significance of photosynthetic bacteria in a meromictic kettle lake. Mittlerer Buchensee, West-Germany

Simulation of dissolved oxygen profiles in a transparent, dimictic lake

Relationships between vertical mixing and photoadaptation of phytoplankton: similarity criteria

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