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RBT5420
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RBT54202022-06-06T18:38:15Z Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica Umaña-Villalobos, Gerardo biodiversidad del fitoplancton lagos tropicales lagos cratéricos variación temporal dinámica de comunidades Phytoplankton biodiversity tropical lake crater lake temporal variation community dynamics The temporal variation in lake's phytoplankton is important to understand its general biodiversity. For tropical lakes, it has been hypothesized that they follow a similar pattern as temperate ones, on a much accelerated pace; nevertheless, few case studies have tried to elucidate this. Most studies in Costa Rica have used a monthly sampling scheme and failed in showing the expected changes. In this study, the phytoplankton of the small Barvass crater lake was followed for more than three years, first with monthly and later with weekly samplings, that covered almost two years. Additional information on temperature and oxygen vertical profiles was obtained on a monthly basis, and surface temperature was measured during weekly samplings around noon. Results showed that in spite of its shallow condition (max. depth: 7m) and low surface temperature (11 to 19°C), the lake stratifies at least for brief periods. The phytoplankton showed both, rapid change periods, and prolonged ones of relative stasis. The plankton composition fluctuated between three main phases, one characterized by the abundance of small sized desmids (Staurastrum paradoxum, Cosmarium asphaerosporum), a second phase dominated by equally small cryptomonads (Chryptochrysis minor, Chroomonas sp.) and a third phase dominated by the green alga Eutetramorus tetrasporus. Although data evidenced that monthly sampling could miss short term events, the temporal variation did not follow the typical dry and rainy seasons of the region, or any particular annual pattern. Year to year variation was high. As this small lake is located at the summit of Barva Volcano and receives the influence from both the Caribbean and the Pacific weather, seasonality at the lake is not clearly defined as in the rest of the country and short term variations in the local weather might have a stronger effect than broad seasonal trends. The occurrence of this short term changes in the phytoplankton of small tropical lakes in response to weather variations needs to be further explored in other lakes. Universidad de Costa Rica 2010-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/5420 10.15517/rbt.v58i4.5420 Revista de Biología Tropical; Vol. 58 No. 4 (2010): Volume 58 – Regular number 4 – December 2010; 1405–1419 Revista de Biología Tropical; Vol. 58 Núm. 4 (2010): Volumen 58 – Número regular 4 – Diciembre 2010; 1405–1419 Revista Biología Tropical; Vol. 58 N.º 4 (2010): Volume 58 – Regular number 4 – December 2010; 1405–1419 2215-2075 0034-7744 10.15517/rbt.v58i4 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/5420/5166 Copyright (c) 2010 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
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| institution |
Universidad de Costa Rica
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| collection |
Revista de Biología Tropical
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| language |
eng
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| format |
Online
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| author |
Umaña-Villalobos, Gerardo
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| spellingShingle |
Umaña-Villalobos, Gerardo
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
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| author_facet |
Umaña-Villalobos, Gerardo
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| author_sort |
Umaña-Villalobos, Gerardo
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| title |
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
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| title_short |
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
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| title_full |
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
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| title_fullStr |
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
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| title_full_unstemmed |
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
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| title_sort |
temporal variation of phytoplankton in a small tropical crater lake, costa rica
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| title_alt |
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
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| publisher |
Universidad de Costa Rica
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| publishDate |
2010
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| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/5420
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| work_keys_str_mv |
AT umanavillalobosgerardo temporalvariationofphytoplanktoninasmalltropicalcraterlakecostarica
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| _version_ |
1810114537268969472
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