Short-term analysis of the phytoplankton structure and dynamics in two ponds with distinct trophic states from Cierva Point (maritime Antarctica)
Phytoplankton communities dominating Musgos and Papúa ponds with differing trophic states were sampled over 3 days enabling the detection of the physiological and population responses of microalgae to short-scale changes in biotic and abiotic factors, rather than frequently analyzed changes in commu...
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2013
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| 005 | 20230518204156.0 | ||
| 008 | 190411s2013 xx ||||fo|||| 00| 0 eng|d | ||
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| 100 | 1 | |a Allende, L. | |
| 245 | 1 | 0 | |a Short-term analysis of the phytoplankton structure and dynamics in two ponds with distinct trophic states from Cierva Point (maritime Antarctica) |
| 260 | |c 2013 | ||
| 270 | 1 | 0 | |m Mataloni, G.; Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Buenos Aires, Argentina; email: mgmatal@yahoo.com |
| 506 | |2 openaire |e Política editorial | ||
| 504 | |a Agawin, N.S.R., Duarte, C.M., Agustí, S., Nutrient and temperature control of the contribution of picoplankton to phytoplankton biomass and production (2000) Limnol Oceanogr, 45, pp. 591-600 | ||
| 504 | |a Allende, L., (2004) Estructura de las fracciones de fitoplancton de lagos antárticos de Bahía Esperanza con estado trófico contrastante. Variaciones estivales e interanuales, e interacciones con otros componentes planctónicos, , Dissertation, University of Buenos Aires | ||
| 504 | |a Allende, L., Pizarro, H., Top-down control on plankton components in an Antarctic pond: experimental approach to the study of low-complexity food webs (2006) Polar Biol, 29, pp. 893-901 | ||
| 504 | |a Almada, P., Allende, L., Tell, G., Izaguirre, I., Experimental evidence of the grazing impact of Boeckella poppei on phytoplankton in a maritime Antartic lake (2004) Polar Biol, 28, pp. 39-46 | ||
| 504 | |a (1975) Standard Methods for the Examination of Water and Wastewaters, , APHA, Washington: APHA | ||
| 504 | |a Bell, E.M., Laybourn-Parry, J., The plankton community of a young, eutrophic, Antarctic saline lake (1999) Polar Biol, 22, pp. 248-253 | ||
| 504 | |a Broady, P.A., The terrestrial algae of Signy Island, South Orkney Islands (1979) Br Antarc Surv Sc Rep, 98, pp. 1-117 | ||
| 504 | |a Butler, H., Atkinson, A., Gordon, M., Omnivory and predation impact of the calanoid copepod Boeckella poppei in a maritime Antarctic lake (2005) Polar Biol, 28, pp. 815-821 | ||
| 504 | |a Callieri, C., Picophytoplanton in freshwater ecosystems: the importance of small-sized phototrophs (2008) Freshw Rev, 1, pp. 1-28 | ||
| 504 | |a Callieri, C., Stockner, J.G., Freshwater autotrophic picoplankton: a review (2002) J Limnol, 61, pp. 1-14 | ||
| 504 | |a Camacho, A., Planktonic microbial assemblages and the potential effects of metazooplankton predation on the food webs of lakes from the maritime Antarctica and sub-Antarctic islands (2006) Rev Environ Sci Biotechnol, 5, pp. 167-185. , doi:10.1007/s1115700600032 | ||
| 504 | |a Davey, M.C., Carbon and nitrogen dynamics in a small pond in the maritime Antarctic (1993) Hydrobiologia, 257, pp. 165-175 | ||
| 504 | |a Elber, F., Shanz, F., The causes of change in the diversity and stability of phytoplankton communities in small lakes (1989) Freshw Biol, 21, pp. 237-251 | ||
| 504 | |a Ellis-Evans, J.C., Microbial diversity and function in Antarctic freshwater ecosystems (1996) Biodivers Conserv, 5, pp. 1395-1431 | ||
| 504 | |a Ettl, H., Gärtner, G., (1995) Syllabus Der Boden, Luft- Und Flechtenalgen, , Stuttgart: Gustav Fischer | ||
| 504 | |a González Garraza, G., Mataloni, G., Fermani, P., Vinocur, A., Ecology of algal communities of different soil types from Cierva Point, Antarctic Peninsula (2011) Polar Biol, 34 (3), pp. 339-351. , doi:10.1007/s00300-010-0887-8 | ||
| 504 | |a Goodman, B.J.A., A physical, chemical and biological investigation of some fresh-water pools on Signy Island, South Orkney Islands (1969) Br Antarct Surv Bull, 20, pp. 1-31 | ||
| 504 | |a Gotelli, N.J., Colwell, R.K., Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness (2001) Ecol Lett, 4, pp. 379-391 | ||
| 504 | |a Harris, G.D., (1986) Phytoplankton Ecology: Structure, Function and Fluctuation, , New York: Chapman and Hall | ||
| 504 | |a Hawes, I., Eutrophication and vegetation development in maritime Antarctic lakes (1990) Antarctic Ecosystems. Ecological Change and Conservation, pp. 83-90. , K. R. Kerry and G. Hempel (Eds.), Berlin: Springer | ||
| 504 | |a Hawes, I., Howard-Williams, C., Schwarz, A.-M., Downes, M.T., Environment and microbial communities in a tidal lagoon at Bratina Island, McMurdo Ice Shelf, Antarctica (1997) Antarctic Communities: Species, Structure and Survival, pp. 170-177. , B. Battaglia, J. Valencia, and D. W. H. Walton (Eds.), Cambridge: Cambridge University Press | ||
| 504 | |a Hawes, I., Smith, C., Howard-Williams, C., Schwarz, A.-M., Environmental conditions during freezing, and response of microbial mats in ponds of the McMurdo Ice Shelf, Antarctica (1999) Antarct Sci, 11, pp. 198-208 | ||
| 504 | |a Healy, M., Brown, K.L., Webster-Brown, J.G., Lane, V., Chemistry and stratification of Antarctic meltwater ponds II: inland ponds in the McMurdo Dry Valleys (Lat 77°S), Victoria Land (2006) Antarct Sci, 18, pp. 525-533 | ||
| 504 | |a Hillebrand, H., Dürselen, C.D.D., Kirschtel, U., Pollingher, T., Zohary, T., Biovolume calculation for pelagic and benthic microalgae (1999) J Phycol, 35, pp. 403-424 | ||
| 504 | |a Howard-Williams, C., Hawes, I., Ecological processes in Antarctic inland waters: interactions between physical processes and the nitrogen cycle (2007) Antarct Sci, 19, pp. 205-217 | ||
| 504 | |a Izaguirre, I., Pizarro, H., Ecology and taxonomy of the epilithic algal community from a stream in Cierva Point (Antarctic Peninsula) (2000) Verh Internat Verein Limnol, 27, pp. 223-229 | ||
| 504 | |a Izaguirre, I., Mataloni, G., Allende, L., Vinocur, A., Summer fluctuations of microbial planktonic communities in a eutrophic lake-Cierva Point, Antarctica (2001) J Plankton Res, 23, pp. 1095-1109 | ||
| 504 | |a Izaguirre, I., Allende, L., Marinone, C., Comparative study of the planktonic communities from lakes of contrasting trophic status at Hope Bay (Antarctic Peninsula) (2003) J Plankton Res, 25, pp. 1079-1097 | ||
| 504 | |a Kemp, P.F., Sherr, B.F., Sherr, E.B., Cole, J.J., (1993) Handbook of methods in aquatic microbial ecology, , Lewis Publishers, Washington DC | ||
| 504 | |a Komárek, J., Planktic oscillatorialean cyanoprokaryotes (short review according to combined phenotype and molecular aspects) (2003) Hydrobiologia, 502, pp. 367-382 | ||
| 504 | |a Komárek, J., Anagnostidis, K., Cyanoprokaryota 1. Teil: Chroococcales (1999) Süsswasserflora Von Mitteleuropa 19/1, , H. Ettl, G. Gärtner, H. Heynig, and D. Mollenhauer (Eds.), Jena: Gustav Fischer | ||
| 504 | |a Komárek, J., Anagnostidis, K., Cyanoprokaryota 2. Teil: Oscillatoriales (2005) Süsswasserflora Von Mitteleuropa 19/2, , B. Büdel, G. Gärtner, L. Krienitz, and M. Schagerl (Eds.), München: Elsevier | ||
| 504 | |a Krammer, K., Lange-Bertalot, H., Bacillariophyceae 1. Teil: Naviculaceae (1986) Süsswasserflora Von Mitteleuropa 2/3, , H. Ettl, J. Gerloff, H. Heynig, and D. Mollenhauer (Eds.), Jena: Gustav Fischer | ||
| 504 | |a Krammer, K., Lange-Bertalot, H., Bacillariophyceae 3. Teil: Centrales, Fragilariaceae, Eunotiaceae (1991) Süsswasserflora Von Mitteleuropa 2/3, , H. Ettl, J. Gerloff, H. Heynig, and D. Mollenhauer (Eds.), Jena: Gustav Fischer | ||
| 504 | |a Kruk, C., Segura, A.M., The habitat template of phytoplankton morphology-basedfunctional groups (2012) Hydrobiologia, 698, pp. 191-202. , doi:101007/s1075001210726 | ||
| 504 | |a Kruk, C., Huszar, V.L.M., Peeters, E.T.H.M., Bonilla, S., Costa, L., Lürling, M., Reynolds, C.S., Scheffer, M., A morphological classification capturing functional variation in phytoplankton (2010) Freshw Biol, 55, pp. 614-627 | ||
| 504 | |a Laybourn-Parry, J., Ellis-Evans, J.C., Butler, H., Microbial dynamics during the summer ice-loss phase in maritime Antarctic lakes (1996) J Plankton Res, 18, pp. 495-511 | ||
| 504 | |a Lizotte, M.P., Phytoplankton and primary production (2008) Polar Lakes and Rivers, , W. F. Vincent and J. Laybourn-Parry (Eds.), Oxford: Oxford University Press | ||
| 504 | |a Marker, A.F.H., Nusch, A., Rai, H., Riemann, B., The measurement of photosynthetic pigments in freshwater and standardization of methods: conclusions and recommendations (1980) Arch Hydrobiol Beih Ergebn Limnol, 14, pp. 91-106 | ||
| 504 | |a Mataloni, G., Komárek, J., Gloeocapsopsis aurea, a new subaerophytic cyanobacterium from Maritime Antarctica (2004) Polar Biol, 27, pp. 623-628 | ||
| 504 | |a Mataloni, G., Pose, M., Non-marine algae from islands near Cierva Point, Antarctic Peninsula (2001) Cryptogam Algologie, 22, pp. 41-64 | ||
| 504 | |a Mataloni, G., Tell, G., Microalgal communities from ornithogenic soils at Cierva Point, Antarctic Peninsula (2002) Polar Biol, 25, pp. 488-491 | ||
| 504 | |a Mataloni, G., Tesolín, G., A preliminary survey of cryobiontic algal communities from Cierva Point (Antarctic Peninsula) (1997) Antarct Sci, 9, pp. 250-258 | ||
| 504 | |a Mataloni, G., Vélez, C.G., Vitreochlamys primaverae (Volvocales, Chlorophyceae): a new green flagellate from the Antarctic Peninsula (2009) Arch Hydrobiol Suppl Algol Stud, 131, pp. 1-14 | ||
| 504 | |a Mataloni, G., Tesolín, G., Tell, G., Characterization of a small eutrophic Antarctic lake (Otero Lake, Cierva Point) on the basis of algal assemblages and water chemistry (1998) Polar Biol, 19, pp. 107-114 | ||
| 504 | |a Mataloni, G., Tell, G., Wynn-Williams, D., Structure and diversity of soil colonizing algal communities from Cierva Point (Antarctic Peninsula) (2000) Polar Biol, 23, pp. 205-211 | ||
| 504 | |a Mataloni, G., Tesolín, G., Sacullo, F., Tell, G., Factors regulating summer phytoplankton in a highly eutrophic Antarctic lake (2000) Hydrobiologia, 432, pp. 65-72 | ||
| 504 | |a Mataloni, G., Vinocur, A., de Tezanos Pinto, P., Abiotic characterization and phycoepilithic community of heavily enriched Pingüinera stream (Cierva Point, Antarctic Peninsula) (2005) Antarct Sci, 17, pp. 163-170 | ||
| 504 | |a Mataloni, G., González Garraza, G., Bölter, M., Convey, P., Fermani, P., What shapes edaphic communities in mineral and ornithogenic soils of Cierva Point, Antarctic Peninsula? (2010) Polar Sci, 4, pp. 405-419 | ||
| 504 | |a Nozaki, H., Ohtani, S., Gonium sociale (Volvocales, Chlorophyta) from Antarctica (1992) Jpn J Phycol (Sôrui), 40, pp. 267-271 | ||
| 504 | |a Pizarro, H.N., Allende, L., Bonaventura, S., Littoral epilithon of lentic water bodies at Hope Bay, Antarctica: biomass variables in relation to environmental conditions (2004) Hydrobiologia, 529, pp. 237-250 | ||
| 504 | |a Reynods, C.S., Scales of disturbance and their role in plankton ecology (1993) Hydrobiologia, 249, pp. 157-171 | ||
| 504 | |a Reynolds, C.S., Functional morphology and the adaptive strategies of freshwater phytoplankton (1988) Growth and Reproductive Strategies of Freshwater Phytoplankton, pp. 388-433. , C. D. Sandgren (Ed.), Cambridge: Cambridge University Press | ||
| 504 | |a Rochera, C., Villaescusa, J.A., Diazmacip, M.E., Gil-Delgado, J.A., Toro, M., Rico, E., Velázquez, D., Camacho, A., Interacciones bióticas en lagos Antárticos. Investigaciones derivadas del proyecto LIMNOPOLAR en la Península Byers (Antártida marítima) (2011) Ecosistemas, 20, pp. 23-32 | ||
| 504 | |a Silvoso, J., Izaguirre, I., Allende, L., Picoplankton structure in clear and turbid eutrophic shallow lakes: a seasonal study (2011) Limnologica, 41, pp. 181-190 | ||
| 504 | |a Sommaruga, R., Robarts, R.D., The significance of autotrophic and heterotrophic picoplankton in hypereutrophic ecosystems (1997) FEMS Microbiol Ecol, 24, pp. 187-200 | ||
| 504 | |a Spurr, B., Limnology of Bird pond, Ross Island, Antarctica (1975) N Z J Mar Freshwater Res, 9, pp. 547-562 | ||
| 504 | |a Stockner, J.G., Callieri, C., Cronberg, G., Picoplankton and other non-bloom-forming Cyanobacteria in lakes (2000) The Ecology of Cyanobacteria, pp. 195-231. , B. A. Whitton and M. Potts (Eds.), Dordrecht: Kluwer Academic Publishers | ||
| 504 | |a Sun, J., Liu, D., Geometric models for calculating cell biovolume and surface area for phytoplankton (2003) J Plankton Res, 25, pp. 1331-1346 | ||
| 504 | |a Taton, A., Grubisic, S., Brambilla, E., de Wit, R., Wilmotte, A., Cyanobacterial diversity in natural and artificial microbial mats of Lake Fryxell (McMurdo Dry Valleys, Antarctica): a morphological and molecular approach (2003) Appl Environ Microbiol, 69, pp. 5157-5169 | ||
| 504 | |a Tesolín, G., Mataloni, G., Tell, G., Preliminary survey of the algal communities from lentic microlimnotopes of Cierva Point (Antarctic Peninsula) (1997) IV Jornadas de Comunicaciones sobre Investigaciones Antárticas, , In: DNA-IAA (ed), Buenos Aires | ||
| 504 | |a Utermöhl, H., Zur Vervollkommnung der quantitativen Phytoplankton Methodik (1958) Mitt Int Ver Limnol, 9, pp. 1-38 | ||
| 504 | |a van de Vijver, B., Frenot, Y., Beyens, L., Freshwater diatoms from Ile de la Possession (Crozet archipelago, Subantarctica) (2002) Biblioth Diatomol, 46, pp. 1-412 | ||
| 504 | |a van der Werff, A., A new method for cleaning and concentrating diatoms and other organisms (1955) Int Ver Theor Angew Limnol Verh, 12, pp. 276-277 | ||
| 504 | |a Venrick, E.L., How many cells to count? (1978) Phytoplankton Manual, pp. 167-180. , A. Sourniavon (Ed.), Paris: Unesco | ||
| 504 | |a Vincent, W.F., Evolutionary origins of Antarctic microbiota: invasion, selection and endemism (2000) Antarct Sci, 12, pp. 374-385 | ||
| 504 | |a Vincent, W.F., Castenholz, R.W., Downes, M.T., Howard-Williams, C., Antarctic Cyanobacteria: light, nutrients, and photosynthesis in the microbial mat environment (1993) J Phycol, 29, pp. 745-755 | ||
| 504 | |a Vinocur, A., Unrein, F., Typology of lentic water bodies at Potter Peninsula (King George Island, Antartica) based on physical-chemical characteristics and phytoplankton communities (2000) Polar Biol, 23, pp. 858-870 | ||
| 504 | |a Vörös, I., Callieri, C., Balogh, K.V., Bertoni, R., Freshwater picocyanobacteria along a trophic gradient and light quality range (1998) Hydrobiologia, 369 (370), pp. 117-125 | ||
| 504 | |a Wait, B.R., Webster-Brown, J.G., Brown, K.L., Healy, M., Hawes, I., Chemistry and stratification of Antarctic meltwater ponds I: coastal ponds near Bratina Island, McMurdo Ice Shelf (2006) Antarct Sci, 18, pp. 515-524 | ||
| 504 | |a Wynn-Williams, D.D., (1992) Direct Quantification of Microbial Propagules and Spores. Biotas Manual of Methods, , Cambridge: Scientific Committee on Antarctic Research | ||
| 504 | |a Zingel, P., Agasid, H., Noges, T., Kisand, V., Ciliates are the dominant grazers on pico- and nanoplankton in a shallow, naturally highly eutrophic lake (2007) Microb Ecol, 53, pp. 134-142 | ||
| 520 | 3 | |a Phytoplankton communities dominating Musgos and Papúa ponds with differing trophic states were sampled over 3 days enabling the detection of the physiological and population responses of microalgae to short-scale changes in biotic and abiotic factors, rather than frequently analyzed changes in community composition responses to long-scale environmental changes. We hypothesized that both environments undergoing diel changes would be dominated by phytoplankton with generalist strategies, while community structure would be mostly dictated by the trophic state of each water body. The phytoplankton biovolumes of both ponds were strongly dominated by euplanktonic nanoflagellated Chlorophyta, while phycocyanin-rich picocyanobacteria dominated the picophytoplankton. Parallel diel cycles of air and water temperatures were more pronounced on a sunny, warm day which prompted algal photosynthesis, revealed by strong increases in dissolved oxygen and pH. Nutrient and phytoplanktonic chlorophyll a confirmed the hypertrophic condition of Papúa pond. This accounted for the distinct community composition encountered in each pond, which remained stable throughout the study, as revealed by the SIMI index. The inverse relationship between the chl a/abundance ratio and the abundances of dominant species together with varying net growth rates (k′) showed algal reproduction, yet densities remained rather stable in both cases. In Musgos pond, fluctuations in k′ for small and median ciliates shadowed those of pico- and nanophytoplankton, respectively, strongly suggesting that they can control algal growth in these 2-level trophic chains. © 2013 Springer-Verlag Berlin Heidelberg. |l eng | |
| 536 | |a Detalles de la financiación: Universidad de Buenos Aires | ||
| 536 | |a Detalles de la financiación: Instituto Antártico Argentino, PIP 5356, UBACYT X864 | ||
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: Acknowledgments This research has been supported by the University of Buenos Aires, CONICET and the Instituto Antártico Argentino through research grants PIP 5356 and UBACYT X864 and contributes to the SCAR EBA research programme. The authors are grateful for the logistic support of the Base Antártica Primavera staff. Dr. Fernando Unrein kindly shared with us unpublished data on picophytoplankton biovolume. Comments from Drs. Clive Howard-Williams, María E. Llames and anonymous referees greatly helped to strengthen the original draft. | ||
| 593 | |a Laboratorio de Limnologia, Instituto de Ecologia Genetica y Evolucion de Buenos Aires (IEGEBA), Consejo Nacional de Investigaciones Científicas y Tecnológicas, Universidad de Buenos Aires, Buenos Aires, Argentina | ||
| 593 | |a Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina | ||
| 593 | |a Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Buenos Aires, Argentina | ||
| 593 | |a Laboratorio de Biodiversidad, Limnología y Ecología de la Conservación, Instituto de Investigación e Ingeniería Ambiental (3iA), Universidad Nacional de San Martín, Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a MARITIME ANTARCTICA |
| 690 | 1 | 0 | |a PHYTOPLANKTON STRUCTURE |
| 690 | 1 | 0 | |a PONDS |
| 690 | 1 | 0 | |a SHORT-TERM STUDY |
| 690 | 1 | 0 | |a CHLOROPHYLL A |
| 690 | 1 | 0 | |a COMMUNITY DYNAMICS |
| 690 | 1 | 0 | |a COMMUNITY STRUCTURE |
| 690 | 1 | 0 | |a CYANOBACTERIUM |
| 690 | 1 | 0 | |a DEVELOPMENTAL BIOLOGY |
| 690 | 1 | 0 | |a DOMINANCE |
| 690 | 1 | 0 | |a ENVIRONMENTAL CHANGE |
| 690 | 1 | 0 | |a ENVIRONMENTAL FACTOR |
| 690 | 1 | 0 | |a FLAGELLATE |
| 690 | 1 | 0 | |a GROWTH RATE |
| 690 | 1 | 0 | |a MICROALGA |
| 690 | 1 | 0 | |a PHOTOSYNTHESIS |
| 690 | 1 | 0 | |a PHYTOPLANKTON |
| 690 | 1 | 0 | |a POND |
| 690 | 1 | 0 | |a REPRODUCTION |
| 690 | 1 | 0 | |a TROPHIC LEVEL |
| 690 | 1 | 0 | |a WATER TEMPERATURE |
| 690 | 1 | 0 | |a ANTARCTICA |
| 690 | 1 | 0 | |a CIERVA POINT |
| 690 | 1 | 0 | |a WEST ANTARCTICA |
| 690 | 1 | 0 | |a ALGAE |
| 690 | 1 | 0 | |a CHLOROPHYTA |
| 690 | 1 | 0 | |a CILIOPHORA |
| 700 | 1 | |a Mataloni, G. | |
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