title: Number of bacteria decomposing organic phosphorus compounds and phosphatase activity in the sand of two marine beaches differing in the level of anthropopressure.
abstract: Number of heterotrophic bacteria ability to decompose organic phosphorus compounds and the level of phosphatase activity in the sand of two marine beaches (southern coast of the Baltic Sea) differing in the level of anthropopressure were studied. The study showed that the number of bacteria and level phosphatase activity were higher in the sand of the beach subjected to stronger anthropopressure. In both studied beaches bacteria hydrolysing DNA were the most numerous (92.7-302.8 CFU·g(-1) d.w.). The least numerous were phytin (26.0·10(3) CFU·g(-1) d.w.) and phenolphthalein diphosphate (11.1·10(3) CFU·g(-1) d.w.) decomposing bacteria. Number of bacteria able to attack tested organic phosphorus compounds were the most numerous in dry zones (10.77-739.92 CFU·g(-1) d.w.) then wet zones (3.34-218.15 CFU·g(-1) d.w.). In both studied beaches bacteria hydrolysing organic phosphorus compounds and phosphatase activity generally were more numerous in surface sand layer. Seasonal variation in the occurrence of bacteria in both studied beaches was observed.
authors.affiliation: Department of Experimental Biology, Pomeranian University in Słupsk, 76-200 Słupsk, Poland.
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Mudryk
authors.affiliation: Department of Experimental Biology, Pomeranian University in Słupsk, 76-200 Słupsk, Poland. Electronic address: pperlinski@apsl.edu.pl.
authors.forename: P
authors.initials: P
authors.lastname: Perliński
authors.affiliation: Department of Environmental Chemistry, Pomeranian University in Słupsk, 76-200 Słupsk, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Antonowicz
authors.affiliation: Department of Experimental Biology, Pomeranian University in Słupsk, 76-200 Słupsk, Poland.
authors.forename: D
authors.initials: D
authors.lastname: Robak
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D001493:Bathing Beaches; D001673:Biodegradation, Environmental; D004247:DNA / Q000378:metabolism; D019015:Geologic Sediments / Q000382:microbiology; D052836:Heterotrophic Processes; D010635:Phenolphthaleins / Q000378:metabolism; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism*; D017553:Phosphorus Compounds / Q000378:metabolism*; D010833:Phytic Acid / Q000378:metabolism; D011044:Poland; D012621:Seasons; D012822:Silicon Dioxide
chemical_list: D010635:Phenolphthaleins; D017553:Phosphorus Compounds; C042125:phenolphthalein diphosphate; D012822:Silicon Dioxide; D010833:Phytic Acid; D004247:DNA; D010744:Phosphoric Monoester Hydrolases
keywords: Bacteria; Beach; Decomposition; Phosphorus