Reference Type: Journal Article Record Number: 113 Author
Notes: 1994 0008-4026 English Journal Article Author Address
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Notes: 1994 0008-4026 English Journal Article Author Address: EA Eng., Sci. Technol., Inc., 8577 154th Ave. NE, Redmond, WA 98052, USA Reference Type: Book Record Number: 170 Author: Jacobsen, B. A. Year: 1994 Title: Bloom formation of Gloeotrichia echinulata and Aphanizomenon flos-aquae in a shallow, eutrophic, Danish lake Series Editor: Descy, J. P.; Reynolds, C. S.; Padisak, J. Number of Pages: 193-197 ISBN: 0018-8158 Accession Number: 3645801 Keywords: eutrophic lakes; phytoplankton; algal blooms; algae; biomass; sediments; lakes; Cyanophyta; Cyanophyta Denmark, Arreskov L.; algal blooms; eutrophic lakes Freshwater Q1 01461 Plankton; SW 0850 Lakes; D 04310 Freshwater; K 03009 Algae
Abstract: Over a period of four years, the seasonal periodicity of dominant phytoplankton species in a shallow, eutrophic Danish lake changed markedly. Cyanophytes prevailed during the summer period of all four years. In the first three years, species of Microcystis, Anabaena and Aphanothece dominated, whereas in the fourth year of investigation, these algae were replaced by Gloeotrichia echinulata (J. E. Smith) Richter and Aphanizomenon flos-aquae (L.) Ralfs. The most striking environmental differences in the fourth year as compared with the previous three years, were an increase in transparency, from about 0.5 meter in 1989-1991 to more than 2 metres preceding the summer maximum in 1992, and a simultaneous occurrence of low oxygen concentrations. A collapse of the fish population was followed by an increased proportion of large Cladocerans in the zooplankton. Improved light conditions at the bottom and grazing pressure from large Cladocerans favoured growth of the large colony forming blue-green algae, Gloeotrichia echinulata and Aphanizomenon flos-aquae. These species germinate from resting spores in the sediment and are able to sustain some growth there before migration to the lake water. The transfer of algal biomass from the bottom sediment to the water phase was accompanied by a marked increase in concentrations of particulate phosphorus and nitrogen in the entire lake. Notes: 9. Workshop of the International Association of Phytoplankton Taxonomy and Ecology (IAP), Mont Rigi (Belgium), 10-18 Jul 1993 Phytoplankton in turbid environments: rivers and shallow lakes., 1994 Hydrobiologia, vol. 289, no. 1-3 English
Book Monograph; Conference Author Address: Lab. Environ. Biol. ApS, Baunebjergvej 5, DK-3050 Humleboek, Denmark Reference Type: Journal Article Record Number: 171 Author: Istvanovics, V.; Padisak, J.; Pettersson, K.; Pierson, D. C. Year: 1994 Title: Growth and phosphorus uptake of summer phytoplankton in Lake Erken (Sweden) Journal: Journal of Plankton Research Volume: 16 Issue: 9 Pages: 1167-1196 Alternate Journal: J. Plankton Res. Accession Number: 3719289 Keywords: phytoplankton; biomass; food absorption; phosphorus; thermal stratification; community composition; nutrient deficiency; epilimnion; freshwater ecology; summer; growth; lakes; nutrient uptake; foods; Ceratium hirundinella; Gloeotrichia echinulata Sweden, Erken L.; nutrient uptake; foods; food absorption; phosphorus; epilimnion; freshwater ecology; community composition; nutrient deficiency; Ceratium hirundinella; Gloeotrichia echinulata; summer Freshwater Q1 01461 Plankton; D 04627 Algae/lichens; K 03009 Algae; SW 0850 Lakes
0142-7873 English Journal Article Author Address: Balaton Limnol. Res. Inst., H-8237 Tihany, Hungary Reference Type: Journal Article Record Number: 174 Author: Pettersson, Kurt; Herlitz, Eva; Istvanovics, Vera Year: 1993 Title: The role of Gloeotrichia echinulata in the transfer of phosphorus from sediments to water in Lake Erken Journal: Hydrobiologia Volume: 253 Issue: 1-3 Pages: 123-9 Accession Number: AN 1993:433840 Keywords: Environmental transport (of phosphorus, from sediment into water, Gloeotrichia echinulata effect on, of Lake Erken, Sweden); Gloeotrichia echinulata (phosphrus transport from sediment into water by, of Lake Erken, Sweden); Geological sediments (lake, phosphrus in, Gloeotrichia echinulata transport of, into water, of Lake Erken, Sweden); Waters (lake, phosphrus in, from sediment, Gloeotrichia echinulata effect on, of Lake Erken, Sweden) Gloeotrichia echinulata phosphorus sediment water Lake Abstract: The abundance of Gloeotrichia echinulata colonies in the sediments of Lake Erken, Sweden, and their P content were studied to det. the contribution of Gloeotrichia colonies to total sediment P. The potential size of the algal inoculum and the migration to the water during summer were estd. The surplus P content of the resting colonies in the sediment was .apprx.45% of total P, which maximized at 8.5 mg P/mg or 81 ng P/colony. The C:P ratio in the early colonies appearing in the lake water was 50:1, while the ratio stabilized at 150 during the major migration period. The internal supply of surplus P was used during the pelagic growth of the colonies. The internal P loading to the epilimnion of Lake Erken due to Gloeotrichia migration could, from the measurements of the increase in particulate epilimnetic P, be estd. at 40 mg P the sediment before and during the migration verified this value to be a conservative est. of the internal P loading due to Gloeotrichia migration to the epilimnion in the lake. The sediment P content calcd. from the P concn. in early epilimnion colonies resulted in a value of 35 mg P/g as a max. This corresponds to only 3% of the total P content in the lake sediment. [on SciFinder (R)] Notes: CAN 119:33840 61-1
Water Inst. Limnol.,Uppsala Univ.,Norrtaelje,Swed. Journal 0018-8158 written in English. 7723-14-0 (Phosphorus) Role: OCCU (Occurrence) (in sediment and water, Gloeotrichia echinulata effect on, of Lake Erken, Sweden) Reference Type: Journal Article Record Number: 173 Author: Pettersson, K.; Bell, R.; Istvanovics, V.; Padisak, J.; Pierson, D. Year: 1993 Title: Phosphorus status of size-fractionated seston in Lake Erken Journal: Verhandlungen - Internationale Vereinigung fuer Theoretische und Angewandte Limnologie Volume: 25 Issue: 1 Pages: 137-43 Accession Number: AN 1993:678110 Keywords: Seston (phosphorus status of size-fractionated, of Lake Erken, Sweden); Geological sediments; Waters (lake, phosphorus status of size-fractionated seston in, of Lake Erken, Sweden) phosphorus seston size Lake Erken Abstract: The size fractionation of seston in Lake Erken, Sweden, reveal significant differences in the nutritional status and functional behavior of the different size classes. The medium seston seems to have taken up phosphate in May to be stored as surplus P, which was consumed during their growth in June. In early July this process resulted in severe P deficiency for the medium seston as indicated by the high specific phosphatase activity. This development is in agreement with earlier findings concerning the spring-summer growth of phytoplankton in Lake Erken. During this period the large seston have no chance to compete as shown by their deficiency. In late July the inoculation of Gloeotrichia colonies from the sediments and phosphate from the hypolimnion changes the situation completely to favor the large seston, now being rich in P. [on SciFinder (R)] Notes: CAN 119:278110 61-1
Water Inst. Limnol.,Uppsala Univ.,Norrtaelje,Swed. Journal 0368-0770 written in English. 7723-14-0 (Phosphorus) Role: MSC (Miscellaneous) (in size-fractionated seston, status of, of Lake Erken, Sweden) Reference Type: Book Record Number: 172 Author: Pettersson, K.; Herlitz, E.; Istvanovics, V. Year: 1993 Title: The role of Gloeotrichia echinulata in the transfer of phosphorus from sediments to water in Lake Erken Series Editor: Boers, P. C. M.; Cappenberg, ThE; Raaphorst, Wvan Number of Pages: 123-129 ISBN: 0018-8158 Accession Number: 2932310 Keywords: phosphorus; biogeochemical cycle; sediment chemistry; sediment-water exchanges; biogeochemistry; Cyanophyta; Gloeotrichia echinulata Cyanophyta; Gloeotrichia echinulata; Sweden, Erken L.; phosphorus; biogeochemical cycle; sediment-water exchanges Freshwater Q2 02187 Geochemistry of sediments; Q1 01482 Ecosystems and energetics; K 03009 Algae; Q4 27480 Environmental Applications/Impact; D 04310 Freshwater
Proceedings of the third international workshop on phosphorus in sediments., 1993 Hydrobiologia, vol. 253, no. 1-3 English
Book Monograph; Conference Author Address: Uppsala Univ., Inst. Limnol., Erken Lab., Norr Malma 4200, S-761 73 Norrtaelje, Sweden Reference Type: Journal Article Record Number: 175 Author: Khatoon, A. A.; Aziz, A. Year: 1993 Title: Morphogenesis of Blue-Green-Algae .5. Akinete Differentiation in Gloeotrichia Natans Journal: Bangladesh Journal of Botany Volume: 22 Issue: 2 Pages: 223-225 Date: Dec Accession Number: ISI:A1993MN12500020 Keywords: morphogenesis; blue green algae; akinete; gloeotrichia natans Notes: English URL: Author Address: KHATOON, AA, UNIV DHAKA,DEPT BOT,DHAKA 1000,BANGLADESH. Reference Type: Journal Article Record Number: 176 Author: Jensen, T. E. Year: 1993 Title: A Morphometric Study of Natural and Laboratory Grown Gloeotrichia Species Journal: Microbios Volume: 74 Issue: 301 Pages: 219-226 Accession Number: ISI:A1993LR35000003 Keywords: morphometric analysis; gloeotrichia plectonema-boryanum cyanophyceae; anabaena-flos-aquae; heavy-metals; components; bodies; algae
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phosphate-uptake; phytoplankton population; lake; dynamics; kinetics; cultures; shallow
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ISTVANOVICS, V, BALATON LIMNOL RES INST,H-8237 TIHANY,HUNGARY. Reference Type: Journal Article Record Number: 178 Author: DeGasperi, C. L.; Spyridakis, D. E.; Welch, E. B. Year: 1993 Title: Alum and nitrate as controls of short-term anaerobic sediment phosphorus release: An in vitro comparison Journal: Lake Reservoir Manage. Volume: 8 Issue: 1 Pages: 49-59 Accession Number: 3651402 Keywords: lakes; nutrient release; phosphorus cycle; anaerobic environments; sediments; phytoplankton; sediment pollution; pollution control; nutrient cycles; alum; phosphorus; nitrates; cycling nutrients; lake sediments; anoxic conditions; eutrophic lakes; nutrients (mineral); Gloeotrichia echinulata alum; nitrate; phosphorus; nitrates; cycling nutrients; lake sediments; anoxic conditions; nutrients (mineral); eutrophic lakes; nutrient release; phosphorus cycle; anaerobic environments; Gloeotrichia echinulata; sediment pollution; pollution control; nutrient cycles Freshwater D 04001 Methodology - general; K 03009 Algae; SW 0850 Lakes; Q2 02187 Geochemistry of sediments; Q1 01461 Plankton; Q5 01505 Prevention and control Abstract: A laboratory comparison of the effectiveness of two sediment phosphorus (P) inactivation techniques (aluminum sulfate and calcium nitrate) was made using intact sediment cores collected from Green Lake, WA. Additional treatments with Na sub(2)S, NaOH, and glucose were performed to assess effectiveness of the treatments under conditions of 1) reduced availability of Fe, 2) increased pH, and 3) organic matter enrichment, respectively. Under warm, dark, quiescent conditions both aluminum sulfate (alum) and calcium nitrate (nitrate) were equally effective in controlling P release from the sediments when compared to a control. Addition of Na sub(2)S resulted in an increase in P release, but again alum and nitrate were equally effective compared to the control. ADdition of NaOH resulted in an increase of P release, but alum was not as effective as nitrate in controlling P release, possibly due to pH sensitivity of the aluminum hydroxy-P complex. ADdition of glucose resulted in an increase of P release, perhaps due to increased gas evolution, but nitrate was not as effective in controlling P release, possibly due to the availability of nitrate for degradation of organic matter and subsequent release of methane and nitrogen gas. Sediment oxygen demand (SOD) of Green Lake sediments was determined to be much less than that of sewage polluted Lake Lillesjoen, Sweden, and similar to the SOD of Lake Lillesjoen sediments following nitrate treatment. Sediment profiles of Fe, Mn, P, N, S, water content, and organic suggest that anaerobic processes were operational in the sediments. Although a recent study indicates that the overlying water does not experience episodes of reduced oxygen content, and that much of the water column increase in P can be attributed to migrating phytoplankton (primarily Gloeotrichia echinulata), possible links between sediment chemical and microbial processes and P uptake by benthic stages of phytoplankton at the sediment-water interface have not been investigated. More well planned and monitored in-lake treatments or limnocorral experiments of both alum and nitrate are needed to improve our predictions of the effectiveness and longivity of these two chemical treatments. Directory: chemistry chemistry -> Summer 2015 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Application for Summer Undergraduate Research Program nsf research Experiences for Undergraduates (reu) – 2015 Please Print Clearly or Type chemistry -> Application for Summer Undergraduate Research Program nsf research Experiences for Undergraduates (reu) – 2016 Please Print Clearly or Type chemistry -> Summer 2014 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Summer 2016 Research Opportunities for Chemistry & Biochemistry Undergraduates chemistry -> Cloud Point Extraction Methodology for Separation and Microamounts Determination of Lead chemistry -> Spring Hill College List of Nearby Restaurant Options Atlanta Bread Company chemistry -> Where the heck is Fernando de Noronha? chemistry -> Topics 6 & 16: Kinetics 1 Collision theory and rates of reaction Download 1.4 Mb. Share with your friends:
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