The biomass changes of microphytobenthos in Lake Balaton during the 1960s

Tamás, Gizella (1974) The biomass changes of microphytobenthos in Lake Balaton during the 1960s. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 41. pp. 343-356. ISSN 0365-3005

Preview

Text 345_cut_MTA_TihanyiBiologiaiKutIntEvkonyve_41.pdf Download (6MB) | Preview

Abstract

The author carried out qualitative and quantitative investigations on the horizontal microphytobenthos in 1965, 1966 and 1967. In 1967 the maximum number of individuals was 1304 i/cm², that of biomass 9.47 µg/cm². Nearly half of the biomass comprised Nitzschia sigmoidea and a quarter of Cymatopleura elliptica. The species of small size and volume yielded very low values. In May, the biomass value at transversal section Ságpuszta-Balatonszemes was 7.47 pg/cm2, while between Balatonfüred and Zamárdi 6.32 /µg/cm². At both places, the diatoms of large size and volume were represented in considerable quantities. During the years investigated the author noted nine lowest biomass values on the basis of samples taken in October. Comparing the 1967 mean biomass values they are two, three or several times higher than those in the previous years. In 1965 and 1966 the lowest mean values were measured between Ságpuszta and Balatonszemes (4.6 and 10.1 mg/m²), while the average minimum in 1967 (32.8 mg/m²) wasobserved at transversal section “K”, between Szigliget and Balatonmária.

Actions (login required)

Edit Item