Bewertungsgrundlagen zur Beurteilung der Lebensraumfunktion kontaminierter Böden an Hand von mikrobiellen Gasumsätzen
type: CreativeWork
description: The application of biological tests for the assessment of the habitat function of soils is of great importance. Soil respiration measured as oxygen consumption or carbon dioxide release is used frequently for the evaluation of contaminated sites. The oxygen and carbon dioxide turn over in soil respiration is composed of different metabolic activities, for example aerobic respiration, nitrification and urease activity. First of all the influence of pollutants on basal respiration and substrate induced respiration was investigated with special consideration of nutrient supply (nitrogen and phosphorus). For the derivation of evaluation criteria, respiration of uncontaminated soils was compared to the respiration of contaminated soils. It was shown that the following criteria can be used for the assessment of the habitat function: Cumulated basal respiration, maximum of substrate induced respiration rate, maximum slope of substrate induced respiration rate, the space of time, which is needed to reach the maximum substrate induced respiration rate. Furthermore it was possible to detect organic pollutants, which are degradable under aerobic conditions, by high cumulated basal respiration and by the influence of nitrogen supply for the time span, which is needed to reach the maximum substrate induced respiration rate (D tN and D tNP). The symptoms, which are caused by a lack of nutrients like ammonia and phosphate, are comparable to the effects caused by pollutants. For this reason the nutrient supply of a soil sample has to be considered for evaluation of soil respiration data. The positive (promotion) or negative (inhibition) influence of nutrients can be quantitatively estimated using the limitation quotients for basal respiration (qBNPn) and for substrate induced respiration (qSXn). Limitation quotients (qSNO2 and qSNCO2) for soils which had high contents of heavy metals were significantly higher than for soils without heavy metal contamination. Standard values and a s…
abstract: The application of biological tests for the assessment of the habitat function of soils is of great importance. Soil respiration measured as oxygen consumption or carbon dioxide release is used frequently for the evaluation of contaminated sites. The oxygen and carbon dioxide turn over in soil respiration is composed of different metabolic activities, for example aerobic respiration, nitrification and urease activity. First of all the influence of pollutants on basal respiration and substrate induced respiration was investigated with special consideration of nutrient supply (nitrogen and phosphorus). For the derivation of evaluation criteria, respiration of uncontaminated soils was compared to the respiration of contaminated soils. It was shown that the following criteria can be used for the assessment of the habitat function: Cumulated basal respiration, maximum of substrate induced respiration rate, maximum slope of substrate induced respiration rate, the space of time, which is needed to reach the maximum substrate induced respiration rate. Furthermore it was possible to detect organic pollutants, which are degradable under aerobic conditions, by high cumulated basal respiration and by the influence of nitrogen supply for the time span, which is needed to reach the maximum substrate induced respiration rate (D tN and D tNP). The symptoms, which are caused by a lack of nutrients like ammonia and phosphate, are comparable to the effects caused by pollutants. For this reason the nutrient supply of a soil sample has to be considered for evaluation of soil respiration data. The positive (promotion) or negative (inhibition) influence of nutrients can be quantitatively estimated using the limitation quotients for basal respiration (qBNPn) and for substrate induced respiration (qSXn). Limitation quotients (qSNO2 and qSNCO2) for soils which had high contents of heavy metals were significantly higher than for soils without heavy metal contamination. Standard values and a s…
author: Güttes, Ralf
language: ger
keywords: info:eu-repo/classification/ddc/570, Biowissenschaften, Biologie, Bodenverschmutzung, Bewertung, Mikroorganismus, Bodenatmung
date published: 2001
date modified: 2026-07-30T19:43:10Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University