Optimal conditions for primary production in a polymictic tropical lake (Lake Xolotl´an, Nicaragua)

Erikson, Rolf and Hooker, Evelyn and Mejía Tellez, Mario and Zelaya Noguera, Ramona Argentina and Vammen, Katherine (1998) Optimal conditions for primary production in a polymictic tropical lake (Lake Xolotl´an, Nicaragua). Hydrobiologia, 382. pp. 1-16.

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Resumen

From 1987 to 1993we assessed the variation of phytoplankton biomass, underwater irradiance and primary production
in Lake Xolotlán (L. Managua, Nicaragua). Chlorophyll-a averaged 65 mg m−3 and maximum and minimum
concentrationswere 120 and 30mg m−3, respectively. The variability over depths and weeks was low (CV< 20%).
There were strong correlations between particulate carbon and chlorophyll-a (the ratio = 100: 1) and between
particulate carbon and particulate nitrogen and phosphorus (the ratio � 100: 11: 1). Gross primary production
averaged 6.8 g C m−2 d−1 and was stable over the years (CV�10%). Algal cell growth was approximately 4–5 g
C m−2 d−1.
Productivity was limited only by the availability of underwater light and the depth of the photic zone was
mainly regulated by the chlorophyll-a concentration. Therefore, areal photic zone chlorophyll-a was the only
factor directly correlated to the integral photosynthetic activity but, contrary to theoretical models, the production
did not increase in proportion to chlorophyll-a. Data from African lakes show a similar pattern.

Item Type:	Article
Información Adicional:	Publicado Hydrobiologia 382 p.1-16, 1998
Palabras Clave Informales:	Fitoplancton Biomasa
Materias:	TESAURO DE INGENIERÍA SANITARIA Y AMBIENTAL > 2000 Ciencias aplicadas y del ambiente > 2104.1 Ambiente Acuático TESAURO DE INGENIERÍA SANITARIA Y AMBIENTAL > 2000 Ciencias aplicadas y del ambiente > 2406 Fitoplancton
Divisiones:	CENTROS DE INVESTIGACION > CENTRO PARA LA INVESTIGACION EN RECURSOS ACUATICOS DE NICARAGUA - CIRA > Artículos Científicos – CIRA
Depositing User:	Lic. Reyna Palma
Date Deposited:	21 Sep 2016 16:49
Last Modified:	11 Sep 2017 20:18
URI:	http://repositorio.unan.edu.ni/id/eprint/2655

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