Abstract
The role of sand interstitial community in process of decomposition of different origin wrack (seaweed, seagrass and mussel) are considered in with the results of laboratory experiments. Quantitative changes of organic matter content, bacteria, marine fungi, microalgae, flagellates, ciliates and insects in wrack and underlying sand are studied. The results obtained in the laboratory closed to the natural conditions
Highlights
Sandy beaches can act as a biogeochemical reactor
A similar pattern was observed in bacteria that mineralize organic phosphorus compounds – under the wrack their density was 0.33 ± 0.08 m colony-forming units (CFU)·cm-3 of sand, which exceeded the control 2.1 times
Decomposition of the studied wrack excluding the temperature was determined by their origin and according their intensity was ranked in the following order: mussels, algae, macrophytes and eelgrass, respectively, 1.24, 0.87 and 0.77 mg (DW)·cm -3·d-1; wrack of animal origin decomposed 1.5 times faster than of plant one
Summary
Sandy beaches can act as a biogeochemical reactor. Water filtering through the beach sands promotes organic matter (OM) decomposition [1,2,3]. At the same time OM content is closely linked with the granulometric composition of the soil [4]. In spite of a big amount of research works devoted to sandy beach ecosystems [5, 6], a little attention was paid to the comprehensive research of storm wrack decomposition by the all sand inhabitants because of the methodical difficulties in such a study
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