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Abstract

IN LAKE VARESE, 31 SEDIMENT SAMPLES WERE COLLECTED, USING A DRAG, FROM RECENT SEDIMENTS (FIRST 10-15 CM), DISTRIBUTED IN SUCH A WAY AS TO REPRESENT THE VARIOUS MORPHOLOGICAL AND HYDRODYNAMIC SITUATIONS AND WITH A SAMPLING DENSITY, SUFFICIENT TO GIVE A RELIABLE DESCRIPTION OF THE SPATIAL HETEROGENEITY OF THE DISTRIBUTION OF THE NUTRIENTS C, N, P AND S IN THE SEDIMENTS. THE ORGANIC AND INORGANIC FRACTIONS OF PHOSPHORUS, CARBON AND SULPHUR WERE DETERMINED FOR EACH SAMPLE, AFTER DRYING, SIEVING TO REMOVE THE LARGE COMPONENTS AND GRINDING, AS WELL AS THE KJELDAHL NITROGEN FRACTION AND USING A CHN ELEMENTAL ANALYSER. THE DATA THUS OBTAINED WERE THEN USED TO DRAW DISTRIBUTION MAPS OF THE ELEMENTS, BOTH TOTAL AND FRACTIONAL. MOREOVER, AS THE FIXED SAMPLING NETWORK, PRODUCED SAMPLES WHICH WERE REPRESENTATIVE OF ZONES AT DIFFERENT DEPTHS, IT WAS POSSIBLE TO DISTINGUISH THE DIFFERENT CONCENTRATIONS REACHED IN THE "EROSION" AND "ACCUMULATION" AREAS AND THEN TO COMPARE THEM WITH THOSE OF OTHER LAKE ENVIRONMENTS WHICH ARE SUBJECT TO EUTROPHICATION TO A DIFFERENT EXTENT.

Additional information

Authors: BAUDO R, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;SERRINI G, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;MARENGO G, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;BO F, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;LATTANZIO A, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;MUNTAU H ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I;JRC-ISPRA, I, ISTITUTO ITALIANO DI IDROBIOLOGIA, CNR, VERBANIA, PALLANZA;JRC-ISPRA, I
Bibliographic Reference: PAPER PRESENTED: OTTAVO CONGRESSO A.I.O.L., PALLANZA/I, MAY 31, JUNE 3, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 33992 I
Availability: Can be ordered online
Record Number: 1989126204600 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: it