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The retrieval of material from the surface micro layer with screen and plate samplers and its implications for partitioning of material within the micro layer
Author(s) -
ESTEP K. W.,
MAKI J. S.,
DANOS S. C.,
REMSEN C. C.
Publication year - 1985
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1985.tb00692.x
Subject(s) - particulates , layer (electronics) , dilution , surface layer , sampling (signal processing) , environmental science , mineralogy , materials science , environmental chemistry , composite material , chemistry , optics , physics , organic chemistry , detector , thermodynamics
SUMMARY.1 The surface micro layers of two small ponds in Wisconsin were sampled over several years using screen and plate samplers. These devices performed identically for dissolved substances but for particulate material the glass plate sampler produced values 4 times those obtained with the screen. 2 These differences in sampling efficiency are probably the result of the failure of the screen sampler to release all of the particulate material it has collected and also to differences in the partitioning of dissolved and particulate material within the micro layer. 3 Results suggest that particulates are concentrated at the air‐water interface and that there is a four‐fold dilution with subsurface water in the screen samples when compared to the plate samples. Dissolved material, in contrast, is concentrated in a thicker layer below the surface mono layer, resulting in equal sampling efficiency with the plate and screen samplers.