Estimation of phytoplankton biomass and production and organic matter decomposition in 3 small field ponds
Polskie Archiwum Hydrobiologii 34(1): 35-50
ISSN/ISBN: 0032-3764 Accession: 005388037
The phytoplankton of three field-ponds situated in a terrain with intensive farming activities was investigated. The ponds differed in their surroundings, being in a dissimilar measure exposed to pollutants running off from fields. The biomass of phytoplankton (.hivin.B = 70.01 g/m3) and its production (P = 2977 kJ/m2, season) as well as the decomposition of organic matter (D = 2445 kJ/m2, season) were greatest in the pond exposed to the highest input of nutrients; namely, fields under cultivation greatly approach the borders of this pond which.sbd.moreover.sbd.serves as a watering place for cattle, this creating an additional source of pollution. It can be assumed that the state of trophy of ponds and the phytoplankton composition are closely related to their surroundings, and that barriers in the form of helophytes, meadows, shrubberies etc. may effectively protect these reservoirs from excessively high trophy.