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A 50-year sediment record of algal assemblage changes in Hanabanilla Reservoir, Cuba
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|Authors:||Labaut, Yeny; Macchi, Pablo A.; Comas, Augusto A.; Betancourt, Carmen R.; Díaz-Asencio, Misael|
|Author Affiliations:||Primary: |
Centro de Estudios Ambientales de Cienfuegos, Reina, Cuba
Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, General Roca, Argentina
|Volume Title:||Journal of Paleolimnology|
|Source:||Journal of Paleolimnology, 63(3), p.235-250. Publisher: Springer, Dordrecht, Netherlands. ISSN: 0921-2728|
|Note:||In English. 57 refs.; illus., incl. 3 tables, sketch map|
|Summary:||Hanabanilla Reservoir, south-central Cuba, is used for electric power generation, potable water supply and tourism. We examined stratigraphic shifts in algal assemblages that accumulated in the reservoir sediments from the time of construction in 1960 through 2012, and inferred the environmental drivers of such biological changes. Historical fluctuations in algal assemblages were driven by scouring of the reservoir bottom, changing water level, and input of organic matter and nitrogen to the water body. Stage records, in conjunction with algal counts, confirm the importance of the pennate/centric diatom ratio for reconstructing past water-level changes. Although nutrient and organic matter inputs to the reservoir also influenced algal abundance and community composition, our findings suggest that regulating reservoir hydrology could be an effective strategy for preventing future cyanobacterial blooms. Shifts in the relative abundances of algal taxa, and dominance of R strategists associated with extreme fluctuations in water level, showed the strong influence of hydrology as a determinant of primary producer assemblage structure.|
|Subjects:||Algae; Assemblages; Charophyta; Chlorophyta; Cores; Correlation; Dams; Diatoms; Ecology; Eukaryotes; Eutrophication; Granulometry; Hydrodynamics; Hydrology; Isotopes; Lead; Metals; Microfossils; Pb-210; Phosphorus; Phytoplankton; Plankton; Plantae; Radioactive isotopes; Sedimentation; Sedimentation rates; Sediments; Statistical analysis; Watersheds; Antilles; Caribbean region; Cuba; Greater Antilles; West Indies; Arimao River basin; Aulacoseira; Bacillariophyceae; Bacteria; Central Cuba; Cyanobacteria; Cyanobacterial blooms; Cyanophyceae; Euglenida; Euglenophyceae; Hanabanilla Reservoir; Microcystis; Zygnemaphyceae|
|Coordinates:||N220535 N220535 W0800400 W0800400|
|Copyright Information:||GeoRef, Copyright 2020 American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany|
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