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Max Ledbetter (1979)
Langmuir circulations and plankton patchinessEcological Modelling, 7
L. Cavalli‐Sforza (1965)
Grundbegriffe der Biometrie, insbesondere der statistischen Methoden bei der Wertbemessung biologisch wirksamer Substanzen
L. Haury, J. Mcgowan, P. Wiebe (1978)
Patterns and Processes in the Time-Space Scales of Plankton Distributions
P. Wangersky, Charles Wangersky (1980)
The Manna Effect: A Model of Phytoplankton Patchiness in a Regenerative SystemInternational Review of Hydrobiology, 65
M. Abbott, T. Powell, P. Richerson (1982)
The relationship of environmental variability to the spatial patterns of phytoplankton biomass in Lake TahoeJournal of Plankton Research, 4
H. Grimm (1965)
Luigi Cavalli-Sforza, Grundbegriffe der Biometrie insbesondere der statistischen Methoden bei der Wertbemessung biologisch wirksamer Substanzen. 209 S., 48 Abb., 54 Tab., 11 Taf. Stuttgart 1964: Gustav Fischer Verlag MDN 24,-Journal of Basic Microbiology, 5
R. M. Cassie (1971)
A Manuel cn Methods for the Assessment of Secondary Productivity in Fresh Waters
D. George, R. Edwardś (1976)
The effect of wind on the distribution of chlorophyll a and crustacean plankton in a shallow eutrophic reservoirJournal of Applied Ecology, 13
P. Richerson, T. Powell, Mark Leigh-Abbott, J. Coil (1978)
Spatial Heterogeneity in Closed Basins
J. Elliott (1971)
Some methods for the statistical analysis of samples of benthic invertebrates
J. Therriault, T. Platt (1981)
Environmental Control of Phytoplankton PatchinessCanadian Journal of Fisheries and Aquatic Sciences, 38
To detect spatial heterogeneous distributions it is necessary to delimitate quantitatively the sum of all errors caused by methods from sampling to counting. This is possible by the coefficient of variation, since it constitutes also a measure of the counting error and since its dependence on the counted number or the mean density of the population is clearly defined. In the investigations the error caused by methods (reproducibility of sampling and counting) does not exceed the theoretically permitted maximum counting error (at p = 0.05). Accordingly, all results of investigations for which the coefficient of variation lies above this counting error limit can be interpreted as actual spatial heterogeneous distributions. During the full circulations of autumn and spring as well as the summer stagnation period, in the Saidenbach storage reservoir no significant differences of the phytoplankton were observed within the range of horizontal distances of appr. 100m for 50% of the cases. For zooplankton. 45% of the investigations indicated a homogeneous distribution. The evaluation of data by the patchiness‐index according to Lloyd (L), the Morisita index (M) as well as the graphical comparison between variance and mean value (82/x) do not show any remarkably different results.
Acta hydrochimica et hydrobiologica – Wiley
Published: Jan 1, 1987
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