Effects of shrimp pond water on phytoplankton: importance of salinity and trophic status of the receiving environment
Data(s) |
09/09/2016
09/09/2016
2014
|
---|---|
Resumo |
Aquaculture generates a large load of effluents richin organic matter and nutrients that may be intro-duced into the environment. This study aimed toassess in a microcosm experiment, the effect ofshrimp pond water mixed with Patos Lagoon estuarywater on phytoplankton chlorophyll a and primaryproduction, simulating two salinities. Chlorophyll a,dissolved inorganic nutrients and primary produc-tion were measured in two experiments. In Harvest I,salinity of shrimp pond and environment water wassimilar, and chlorophyll a showed different trendsover time, according to the amount of nitrogen avail-able. In Harvest II, with different salinities and highnutrient concentrations in environment water, chlo-rophyll a levels showed a similar increasing trendover time in all mixtures. Net primary productionshowed differences among treatments in the firstsampling in Harvest I, but not in the second, whereasno differences were observed among treatments inHarvest II. We conclude that shrimp pond effluentcan lead to short-term variations in chlorophyll aand primary production levels, with similar salinities.Salinity differences result in lower chlorophyll a andprimary production values than expected accordingto the nutrient input. Differences in salinity can bean important management strategy to choose thebest harvest period. |
Identificador |
CARDOZO, Alessandro Pereira; ODEBRECHT, Clarisse. Effects of shrimp pond water on phytoplankton: importance of salinity and trophic status of the receiving environment. Aquaculture Research, v. 45, p. 1600–1610, 2014. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1111/are.12106/abstract>. Acesso em: 04 Nov. 2015. 1365-2109 http://repositorio.furg.br/handle/1/6513 doi: 10.1111/are.12106 |
Idioma(s) |
eng |
Direitos |
open access |
Palavras-Chave | #Chlorophyll #Nutrients #Patos lagoon estuary #Phytoplankton #Primary production #Shrimp |
Tipo |
article |