Estimation of the primary production in Lake Maarsseveen I with an incubator technique

Flik, Ben J. G.; Keyser, A.

doi:10.1007/bf02260257

Cited by 27 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SFR in the first two lakes appears to fluctuate enormously, the food concentrations being close to the incipient limiting concentration . The primary production rates in x L A K ES X 1 5 7 these deep lakes (Gulati 1972 ; see also Flik & Keyser 1981) are almost an order of magnitude lower than in shallow, mixed and eutrophic lakes . Because of the great mean depth and summer stratification, nutrients appear to limit primary production in the deep lakes .…”

Section: Impact Of Grazing In the Lake Ecosystemmentioning

confidence: 93%

The zooplankton: its community structure, food and feeding, and role in the ecosystem of Lake Vechten

Gulati¹,

Siewertsen²,

Postema³

1982

Hydrobiologia

110

View full text Add to dashboard Cite

The structure, feeding and metabolism of the filterfeeders community of Lake Vechten (The Netherlands) were investigated for seven years in relation to the functioning of the lake's ecosystem. The 14 C-technique used in the grazing and assimilation study is discussed in detail with a critical analysis of the methodological errors .The three major species which contributed to the annual density, biomass and grazing maxima in spring are : Bosmina longirostris, Daphnia spp . and Eudiaptomus gracilis . The rise in grazing pressure in recent years, particularly in May, was accompanied by a corresponding decrease in the seston (<33 µm) biomass, and in increase of inedible algae, especially Ceratium hirudinella, in late summer . The means of daily grazing ranged from 3% in March to 34% in June . The mean annual ratio ingestion: phytoplankton production varied from 70 to 230% . The specific filtering rate, SFR (ml • day 1 • mg 1 zoop • C), was related directly to water temperature but inversely to the food concentrations .The main errors in the ingestion and assimilation rates were related to the leaching of the isotope from the animals in the preservation fluid . The loss of tracer was 42 and 26%, respectively, for the two rates .In spring, the food removed by the grazers per day was equivalent to 125-400% of the daily primary production . This caused a sharp decrease in the seston concentrations and a recurring `clear water' phase because of a sharp increase in the Secchi depth . The zooplankton assimilatory removal of carbon and the sedimentation loss rates to the hypolimnion exceeded the primary production rates . The inconsistencies in the carbon budget are possibly due to our lack of knowledge of the horizontal transport of material from the littoral, bacteria as an alternative food source for zooplankton, and the DOC dynamics .The grazers' activity as SFR in deep, stratifying lakes like Vechten is 3 to 4 times that in the shallow, mixed and more eutrophic Dutch lakes . In the former category of lakes the crustacean herbivores serve as an important link in the food chain in the limnetic region .

show abstract

Section: Impact Of Grazing In the Lake Ecosystemmentioning

confidence: 93%

The zooplankton: its community structure, food and feeding, and role in the ecosystem of Lake Vechten

Gulati¹,

Siewertsen²,

Postema³

1982

Hydrobiologia

110

View full text Add to dashboard Cite

show abstract

“…The incubator (Flik & Keyzer, 1981) had eight compartments containing tap water for temperature control. The incubation bottles were fixed in such a way that one side was perpendicular to the direction of the light beam.…”

Section: Methodsmentioning

confidence: 99%

Interspecific variation in pigmentation: implications for production estimates for shallow eutrophic lakes using an incubator

1992

View full text Add to dashboard Cite

In shallow, eutrophic Lake Loosdrecht, light attenuation and spectral changes with depth are pronounced due to high concentration of algae and tripton. Calculations of integrated daily primary production have been based on the photosynthesis-irradiance relationship (P/E-curve) obtained with the incubator technique. The suitability of this technique for estimating primary production in such a turbid lake was investigated by comparing P/E-curves for two differently pigmented algae, Oscillatoria limnetica and Prochlorothrix hollandica, in two laboratory systems differing in light regime. System (1) consisted of an incubator filled with tapwater, and system (2) was an algal culture in a laboratory scale enclosure (LSE). For 0. limnetica the P/E-curves were identical. The P/E-curves for P. hollandica diverged considerably: the photosynthetic efficiency in the LSE (0.19 mg 02 (mg Chl)-' h-(W m-2 ) -I was about half of that obtained in the incubator (0.35 mg 02 (mg Chl)-h -' (W m-2 )-1. These results were explained by the interspecific variation in pigmentation. The photosynthetic efficiency of P. hollandica changed due to the dependence on the chlorophyll specific absorption for the whole photosynthetic waveband on the spectral light distribution, which for 0. limnetica was approximately the same in the two light regimes. Column-integrated primary production computed with the photosynthetic characteristics of P. hollandica obtained in LSE, was 10-30% lower than the production based on incubator data.

show abstract

“…14C incorporation was measured after 3 hours of incubation at 8 different light intensities and, for each of the size fractions, P-I curves were determined. The measurement of 14 c assimilation and the enumeration of the total phytoplankton assemblage were performed as described by FLIK andKEYSER (1981) andFLIK (1986). Values from the resulting P-I curves were used in a mathematical model to calculate the daily primary production.…”

Section: Methodsmentioning

confidence: 99%

Underestimation of primary production as indicated by measurements with size-fractionated phytoplankton in Lake Maarsseveen I (The Netherlands)

Flik

Bos

Royackers

et al. 1987

Hydrobiological Bulletin

Self Cite

View full text Add to dashboard Cite

Primary productivity of four size classes of phytoplankton ( <150/~m, < 50/Jm, < 20/~m and ,~ 5/~m) was measured from March through October 1986 in Lake Maarsseveen I with an inbubator technique. The mean column production was approximately 400 mg C.m-2.day -1, with a range of values between 150 and 750 mg C.m-2.day-1. The mean contribution of the size fractions < 50 #m, < 20/~m and < 5 #m to the size fraction <. 150/~m was 80 %, 60 % and 35 %, respectively. During their appearance the grazing impact of small herbivorous zooplankton, e.g. rotifers, can give an underestimation of the size fraction <. 150/Jm. An indication of this phenomenon is given.

show abstract

Estimation of the primary production in Lake Maarsseveen I with an incubator technique

Cited by 27 publications

References 6 publications

The zooplankton: its community structure, food and feeding, and role in the ecosystem of Lake Vechten

The zooplankton: its community structure, food and feeding, and role in the ecosystem of Lake Vechten

Interspecific variation in pigmentation: implications for production estimates for shallow eutrophic lakes using an incubator

Underestimation of primary production as indicated by measurements with size-fractionated phytoplankton in Lake Maarsseveen I (The Netherlands)

Contact Info

Product

Resources

About