ISSN:
1573-5117
Schlagwort(e):
lakes
;
Amazon
;
primary production
;
tropics
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract Enrichment experiments consisting of additions of nutrients (nitrogen and phosphorus) and humic and fulvic acids were carried out using natural phytoplankton assemblages from Lago Jacaretinga, Central Amazon, Brazil. The addition of nutrients resulted in greatly stimulated primary production whereas addition of humic and fulvic acids had no effect. When both nutrients and humic and fulvic acids were added in combination, algal community response was identical to treatments in which only nutrients had been added. The result contrasts with previous phytoplankton culture studies in which the addition of humic material to the culture media increased production. Comparison of absorbance spectra indicated a severe reduction in the quantity and quality of light in Amazonian ‘black waters’ relative to that in ‘white waters’.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00011569
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