Academic literature on the topic 'Freshwater plankton'

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Journal articles on the topic "Freshwater plankton"

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Trivedi, Seema, and Anupriya Karode. "DIVERSITY OF PHYTOPLANKTON IN KSHIPRA RIVER- TRIVENI STATION, UJJAIN (M.P.)." International Journal of Research -GRANTHAALAYAH 3, no. 9SE (September 30, 2015): 1–4. http://dx.doi.org/10.29121/granthaalayah.v3.i9se.2015.3175.

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Planktons are minute organisms and essential links in food chain in aquatic system. Plankton is most importance in the freshwater ecosystem as these are the main source of energy and having a very high nutritive value .The present study is going to centralize on kshipra river, Ujjain (M.P.) in year 2014. The plankton were collected, counted and identified by using the method suggested by APHA and Prescott. The study among all these phytoplankton Bacillariophyceae was recorded as a dominant class in Kshipra River.
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del Giorgio, Paul A., and Josep M. Gasol. "Biomass Distribution in Freshwater Plankton Communities." American Naturalist 146, no. 1 (July 1995): 135–52. http://dx.doi.org/10.1086/285790.

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Dumont, Henri J. "Rotifers, the jelly plankton of freshwater." Hydrobiologia 593, no. 1 (August 28, 2007): 59–66. http://dx.doi.org/10.1007/s10750-007-9047-8.

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Van Donk, Ellen. "Chemical information transfer in freshwater plankton." Ecological Informatics 2, no. 2 (June 2007): 112–20. http://dx.doi.org/10.1016/j.ecoinf.2007.03.002.

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Paloheimo, J. E., and R. R. Fulthorpe. "Factors Influencing Plankton Community Structure and Production in Freshwater Lakes." Canadian Journal of Fisheries and Aquatic Sciences 44, no. 3 (March 1, 1987): 650–57. http://dx.doi.org/10.1139/f87-079.

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Relationships among biomasses and levels of production of nannoplankton, netplankton, herbivorous zooplankton, and carnivorous zooplankton, as well their dependence on environmental parameters, were studied in 26 central Ontario lakes. Planktonic biomasses were only weakly correlated with each other. Correlations were improved by converting biomasses to production estimates using size-specific turnover rate corrections on size-structured data. Further use of size-structured data was of limited value. Sets of environmental parameters, particularly the water chemistry data, were better predictors of planktonic biomasses and productions than other biotic (predator/prey) data. Total Kjeldahl nitrogen was a better predictor of total plankton production estimates than total phosphorus. Lakes could not be clustered into stable community types due to the large year-to-year fluctuations in the data.
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Rojo, Carmen, María A. Rodrigo, Guillem Salazar, and Miguel Álvarez-Cobelas. "Nitrate uptake rates in freshwater plankton: the effect of food web structure." Marine and Freshwater Research 59, no. 8 (2008): 717. http://dx.doi.org/10.1071/mf08023.

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Nitrate incorporation rates by primary producers and the transfer of nitrogen to upper planktonic food web levels in different seasons (spring and summer of different years) were studied using a microcosm experimental approach. The study communities were natural plankton communities from Colgada Lake (central Spain), which is heavily polluted by nitrate. Natural δ15N in phytoplankton and zooplankton was measured and experiments were performed on the 15N supply. Naturally derived δ15N varied from 7.4 to 8.6‰ and from 10.0 to 16.8‰ in phytoplankton and zooplankton respectively. Nitrogen incorporation rates ranged from 0.006 to 0.036 μM h–1 and from 0.0004 to 0.0014 μM h–1 in phytoplankton and zooplankton respectively. The differences in natural δ15N levels and nitrogen incorporation rates between plankton fractions from seasonally different communities reported in the present study suggested that the nitrogen uptake by planktonic communities in Colgada Lake depend on different combinations of dominant zooplankters and phytoplankton size structure. A higher level of nitrogen uptake by phytoplankton occurred when small algae were dominant without competitors (larger algae) or main predators (herbivorous zooplankters). This was because copepods, with the lowest zooplankton nitrogen uptake, were dominant. Phytoplankton nitrogen uptake was lower when big algae were dominant.
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Twining, Benjamin S., Michael R. Twiss, and Nicholas S. Fisher. "Oxidation of Thallium by Freshwater Plankton Communities." Environmental Science & Technology 37, no. 12 (June 2003): 2720–26. http://dx.doi.org/10.1021/es026145i.

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Sommer, Ulrich. "Trophic Cascades in Marine and Freshwater Plankton." International Review of Hydrobiology 93, no. 4-5 (October 2008): 506–16. http://dx.doi.org/10.1002/iroh.200711039.

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Caumette, G., I. Koch, K. House, and K. J. Reimer. "Arsenic cycling in freshwater phytoplankton and zooplankton cultures." Environmental Chemistry 11, no. 5 (2014): 496. http://dx.doi.org/10.1071/en14039.

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Environmental context Understanding how arsenic is changed from toxic to non-toxic chemical forms in lakes and rivers is important in understanding the overall risk from arsenic. Freshwater plankton exposed in laboratory cultures to different sources of toxic inorganic arsenate formed arsenosugars, but at higher exposure levels, in water and through contaminated sediment, inorganic arsenate remained unchanged. In arsenic-contaminated freshwater bodies, plankton may provide a source of toxic inorganic arsenic to consumers. Abstract Freshwater phytoplankton (Chlamydomonas) and zooplankton (Daphnia pulex) were exposed to arsenic to trace the arsenic transformations and the formation of organoarsenic compounds at the base of the freshwater food chain. Plankton were cultured in artificial lake water, and exposed to arsenic through several pathways, hypothesised to be the main exposure sources: through water, food and contaminated sediments. High performance liquid chromatography–inductively coupled plasma–mass spectrometry and X-ray absorption spectroscopy were used to determine arsenic speciation in the studied organisms, and X-ray fluorescence mapping was used to locate the arsenic in a single Daphnia specimen. The results show that the formation of methylated arsenic compounds and arsenosugars by the zooplankton organisms was independent of the exposure route, but instead dependent on arsenic concentration in the environment. Specifically, organoarsenic compounds were dominant in extracts of Daphnia organisms exposed to low arsenic concentrations through water at 10µgL–1 (67%), and through contaminated food (75%), but inorganic arsenic was dominant in Daphnia exposed to high arsenic concentrations, including contaminated sediments. Phytoplankton cultures contained variable amounts of arsenosugars, but on average the dominant compound in phytoplankton was inorganic arsenic. The main implications of the present study for understanding arsenic cycling in the freshwater plankton community are that arsenosugars are formed at possibly both the phytoplankton and zooplankton trophic levels; and that higher arsenic loads in plankton correspond to higher inorganic arsenic concentrations, which could indicate a saturation of the arsenic methylation process by plankton organisms.
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Valois, Amanda E., and Robert Poulin. "Global drivers of parasitism in freshwater plankton communities." Limnology and Oceanography 60, no. 5 (June 19, 2015): 1707–18. http://dx.doi.org/10.1002/lno.10127.

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Dissertations / Theses on the topic "Freshwater plankton"

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Del, Giorgio Paul A. "Heterotrophy in lake plankton." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41362.

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The overall aim of this thesis was to determine the relative importance of heterotrophy and autotrophy in lake plankton. Empirical analyses using extensive surveys of literature data revealed three specific patterns in metabolism and biomass structure in freshwater plankton. First, the ratio of phytoplankton production to plankton respiration (P/R ratio) tends to be low in unproductive lakes ($<$1), and increases along gradients of enrichment. Second, the contribution of planktonic heterotrophs (bacteria and zooplankton) to community respiration is highest in oligotrophic lakes. Third, planktonic heterotrophs dominate community biomass in oligotrophic lakes, whereas phytoplankton increasingly dominate plankton biomass along gradients of enrichment. These three distinct patterns were then tested simultaneously in a set of lakes that span a wide trophic gradient. Results indicated that the plankton of oligotrophic and mesotrophic lakes were characterized by P/R ratios well below unity, and a high contribution of heterotrophs to both community respiration and biomass. These trends are completely the opposite in the most productive lakes. The plankton communities of oligotrophic temperate lakes are predominantly heterotrophic and extensively utilize external inputs of carbon, and therefore only the plankton of eutrophic lakes conformed to the classical phytoplankton-based food web. In most lakes, excess heterotrophic activity could be supported by inputs of organic matter from the drainage basin. Excess plankton respiration, fueled by allochthonous organic carbon, could represent an important source of CO$ sb2$ to lakes.
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Sanderson, Rory J. "Ecology of freshwater plankton in contrasting hydraulic environments." Thesis, University of Leicester, 1998. http://hdl.handle.net/2381/29785.

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The effects of contrasting water residence time on the planktonic community of three water bodies was studied. The sites were Rutland Water, Covenham reservoir and the River Nene, in order of decreasing retention time. The river was the only site where the residence time was sufficiently short to directly impact upon planktonic populations. The importance of physical mechanisms of control in the river was indicated by the dominance of r-selected phytoplankton, namely diatoms and green algae, and zooplankton, namely rotifers. This pattern was in contrast to that of the reservoirs in which slower-growing cyanobacteria and cladocerans dominated. Riverine rotifers were found to have rapid population turnover, due to a combination of short pre-adult duration and high maximum growth rates. Some species also showed a shift in reproductive behaviour to the constant production of resting eggs. This was assumed to convey benefits in a system where resting stages may be less susceptible than adults to downstream displacements. The total chlorophyll 'a' concentration achieved per unit phosphorus was significantly lower in the river than either of the reservoirs. Algal density was negatively associated with discharge in the Nene, suggesting the importance of physical control. The relationship was not a simple one, however, as periods of increased retention time during the summer were associated with low algal density. The absolute density of rotifers was found to be constrained by discharge. Animals were rare above a threshold flow velocity of 0.08ms-1. Simple models of water flow in open channels were insufficient to account for the continued persistence of a plankton in the Nene given the level of advection. It was assumed that the overall retention time of the system was increased by the presence of dead zones within the channel which 'held' planktonic organisms for sufficient time for populations to develop. This behaviour was important during the spring when population density increased in the main channel.
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Penczykowski, Rachel M. "Interactions between ecosystems and disease in the plankton of freshwater lakes." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50368.

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I investigated effects of environmental change on disease, and effects of disease on ecosystems, using a freshwater zooplankton host and its fungal parasite. This research involved lake surveys, manipulative experiments, and mathematical models. My results indicate that ecosystem characteristics such as habitat structure, nutrient availability, and quality of a host’s resources (here, phytoplankton) can affect the spread of disease. For example, a survey of epidemics in lakes revealed direct and indirect links between habitat structure and epidemic size, where indirect connections were mediated by non-host species. Then, in a mesocosm experiment in a lake, manipulations of habitat structure and nutrient availability interactively affected the spread of disease, and nutrient enrichment increased densities of infected hosts. In a separate laboratory experiment, poor quality resources were shown to decrease parasite transmission rate by altering host foraging behavior. My experimental results also suggest that disease can affect ecosystems through effects on host densities and host traits. In the mesocosm experiment, the parasite indirectly increased abundance of algal resources by decreasing densities of the zooplankton host. Disease in the experimental zooplankton populations also impacted nutrient stoichiometry of algae, which could entail a parasite-mediated shift in food quality for grazers such as the host. Additionally, I showed that infection dramatically reduces host feeding rate, and used a dynamic epidemiological model to illustrate how this parasite-mediated trait change could affect densities of resources and hosts, as well as the spread of disease. I discuss the implications of these ecosystem–disease interactions in light of ongoing changes to habitat and nutrient regimes in freshwater ecosystems.
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She, Nian. "Chaos in aquatic systems /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/6370.

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Henshaw, Tracey. "Seasonal microbial dynamics in two ultra-oligotrophic Antarctic freshwater lakes." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368363.

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McKinnon-Newton, Laurie. "Ecology of plankton in a terminal lake Walker Lake, Nevada, USA /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1446303.

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Thompson, Patrick Lyn. "Regional plankton diversity as a buffer against environmental change in freshwater ecosystems." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/17411.

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Many experiments show that species diversity at small, local scales affects ecosystems; however, conservation is concerned with extinctions of species across broad landscapes. The relevance of global or regional diversity to ecosystems therefore remains in question. I asked whether regional biodiversity in freshwater zooplankton affects the resilience and resistance of local ecosystems to the multiple stressors of warming and salinization. I hypothesised that dispersal of species from the regional community should buffer ecosystems against environmental change by providing species with traits adapted to the novel conditions. I subjected freshwater zooplankton communities in mesocosms that were either connected to or isolated from the larger regional species pool to a factorial manipulation of experimental warming and increased salinity. Dispersal introduced heat-tolerant regional taxa that were able to compensate for reductions in local taxa under warmed conditions. Dispersal also dampened the effects of warming on net primary productivity, suggesting that regional diversity can provide stability against some aspects of climate change. However, other measures of ecosystem performance like decomposition and sedimentation were affected by warming and salinity but not dispersal. The results indicate that regional biodiversity provides important insurance that can stabilize ecosystems in a dynamic environment. However, compensation by the regional biota could not buffer all ecosystem rates against all sources of stress. My results show that the connectivity of habitats to regional biodiversity introduces species with broad ranges of traits that can maintain some local ecosystem function in the face of environmental changes.
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Thompson, Lisa C. "The influence of hydraulic retention time on planktonic biomass in lakes and reservoirs /." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56754.

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Hydraulic retention time (HRT) might contribute to the substantial variation in phosphorus-chlorphyll and chlorophyll-zooplankton models because rapid flushing might depress plankton development. However, for a world-wide data set. HRT was not correlated with chlorophyll. Total phosphorus had no effect on chlorphyll when hypereutrophic sites were considered separately, but chlorophyll was negatively related to HRT. Short term HRT, averaged over periods up to one month, was not correlated with chlorophyll, or zooplankton biomass, in seven impoundments on the St. Lawrence and Ottawa Rivers. The size distribution of algae was not affected by HRT. The proportion of rotifer to total zooplankton biomass was positively related to HRT, but this trend disappeared when nauplius biomass was removed from the total. These results indicate that rapid flushing does not necessarily reduce planktonic biomass and that short term HRT is not useful for the prediction and management of planktonic biomass in these systems.
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Huang, Hui Doyle Robert D. "Spatial and temporal patterns of planktonic and community metabolism along the riverine-lacustrine gradient in Texas reservoirs." Waco, Tex. : Baylor University, 2006. http://hdl.handle.net/2104/4958.

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Tewes, Miriam [Verfasser], and Hans-Curt [Akademischer Betreuer] Flemming. "Association of hygienically relevant microorganisms with freshwater plankton / Miriam Tewes ; Betreuer: Hans-Curt Flemming." Duisburg, 2020. http://d-nb.info/1213910552/34.

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Books on the topic "Freshwater plankton"

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Kumar, Arvind. Freshwater plankton and macrophytes of India. New Delhi: Daya Publishing House, 2015.

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Yamagishi, Takaaki. Plankton algae of Southeast Asia. Dehra Dun: Bishen Singh Mahendra Pal Singh, 2010.

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Lazareva, V. I. Struktura i dinamika zooplanktona Rybinskogo vodokhranilishcha. Moskva: T-vo nauch. izd. KMK, 2010.

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Sentā, Shiga Kenritsu Eisei Kankyō. Biwako ni okeru "mizu no hana" ni kansuru chōsa hōkokusho: Shōwa 59-nen--61-nen. Shiga-ken Ōtsu-shi: Shiga Kenritsu Eisei Kankyō Sentā, 1988.

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Braginskiĭ, L. P. Presnovodnyĭ plankton v toksicheskoĭ srede. Kiev: Nauk. dumka, 1987.

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Kavaliauskienė, J. Lietuvos ežerų dumbliai. Vilnius: Geografijos institutas, 1996.

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Plankton of inland waters: A derivative of encyclopedia of inland waters. Burlington, MA: Academic Press, 2010.

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Branch, Ontario Water Resources. Chrysophyte blooms in the plankton and neuston of marine and freshwater systems. Toronto: Queen's Printer for Ontario, 1992.

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Nihon tansui dōbutsu purankuton kensaku zusetsu. Tōkyō: Tōkai Daigaku Shuppankai, 2000.

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Branch, Ontario Water Resources. Measuring zooplankton net filtration efficiency in Dorset lakes: Report. Toronto, Ont: Ministry of the Environment, 1992.

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Book chapters on the topic "Freshwater plankton"

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Petrova, Nina A. "Seasonality of Melosira-plankton of the great northern lakes." In Seasonality of Freshwater Phytoplankton, 65–73. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4818-1_5.

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Walz, N. "Rotifer life history strategies and evolution in freshwater plankton communities." In Evolutionary Ecology of Freshwater Animals, 119–49. Basel: Birkhäuser Basel, 1997. http://dx.doi.org/10.1007/978-3-0348-8880-6_5.

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De Smet, Willem H. "Freshwater Rotifera from plankton of the Kerguelen Islands (Subantarctica)." In Rotifera IX, 261–72. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0756-6_35.

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Flores, L. Naselli, and R. Barone. "Relationship between trophic state and plankton community structure in 21 Sicilian dam reservoirs." In Nutrient Dynamics and Biological Structure in Shallow Freshwater and Brackish Lakes, 197–205. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-2460-9_17.

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Fransz, H. G. "Effects of Fresh Water Inflow on the Distribution, Composition and Production of Plankton in the Dutch Coastal Waters of the North Sea." In The Role of Freshwater Outflow in Coastal Marine Ecosystems, 241–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70886-2_16.

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Stockner, John G., and Karen G. Porter. "Microbial Food Webs in Freshwater Planktonic Ecosystems." In Complex Interactions in Lake Communities, 69–83. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4612-3838-6_5.

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Sarvala, Jouko. "Closing address: perspectives on basic and applied, freshwater and marine pelagic research." In Eutrophication in Planktonic Ecosystems: Food Web Dynamics and Elemental Cycling, 341–44. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-017-1493-8_29.

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Komárek, Jiří, and Jan Mareš. "An update to modern taxonomy (2011) of freshwater planktic heterocytous cyanobacteria." In Phytoplankton responses to human impacts at different scales, 327–51. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5790-5_24.

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Javornický, Pavel. "Taxonomic notes on some freshwater planktonic Cryptophyceae based on light microscopy." In Phytoplankton and Equilibrium Concept: The Ecology of Steady-State Assemblages, 271–83. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-2666-5_21.

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Abella, C. A., and L. J. Garcia-Gil. "Microbial ecology of planktonic filamentous phototrophic bacteria in holomictic freshwater lakes." In The Dynamics and Use of Lacustrine Ecosystems, 79–86. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2745-5_7.

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Conference papers on the topic "Freshwater plankton"

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Deb, Saswati, and Bhaskar Das. "Numerical Simulation of Plankton Dynamics and its Sensitivity to Seasonal Variations in Freshwater Forcing." In IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2020. http://dx.doi.org/10.1109/igarss39084.2020.9324534.

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Tsydenov, Bair O. "The impact of surface heat fluxes on plankton population dynamics during the thermal bar in a freshwater lake." In XXII International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, edited by Gennadii G. Matvienko and Oleg A. Romanovskii. SPIE, 2016. http://dx.doi.org/10.1117/12.2248508.

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