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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/19225
Título: 
Seasonal variation of biomass and productivity of the periphytic community on artificial substrata in the Jurumirim Reservoir (São Paulo, Brazil)
Autor(es): 
Instituição: 
  • Universidade Estadual Paulista (UNESP)
  • Inst Bot
ISSN: 
0018-8158
Resumo: 
The seasonal variation of the periphytic community attached to an artificial substratum (glass tubes) was studied during two different periods in a lagoon connected to the Paranapanema River, the main tributary of the Jurumirim Reservoir (São Paulo-Brazil). An analysis of dry weight, ash free dry weight, chlorophyll a, phaeophytin and primary productivity of periphyton was carried out. The first experiment lasted from August to December 1993, the second from February to June 1994. Tubes were removed after 7, 14, 21, 28, 60, 90 and 119 days of incubation. In the 1st experiment, the periphytic community reached a higher biomass after the 4th week of colonization (28th day), in the 2nd experiment after the 2nd week (14th day). This discrepancy is related to seasonal differences in environmental factors (water temperature, nutrients concentrations and water discharge) that determine initial colonization. After the first stages of colonization, the biomass and primary productivity of periphyton reached their maximum values after the 60th day of incubation. In both experiments, three developmental phases could be discerned. In the initial phase, an exponential growth was observed. In the second phase, the bioderm reached its maximum biomass and productivity. In the third phase, a decrease of biomass and productivity occurred.
Data de publicação: 
1-Set-2000
Citação: 
Hydrobiologia. Dordrecht: Kluwer Academic Publ, v. 434, n. 1-3, p. 35-40, 2000.
Duração: 
35-40
Publicador: 
Kluwer Academic Publ
Palavras-chaves: 
  • periphyton
  • primary productivity
  • artificial substratum
  • succession
Fonte: 
http://dx.doi.org/10.1023/A:1004086623922
Endereço permanente: 
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/19225
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