In the thermodynamic theory of aquatic ecosystems the non-linear relations between rates and affinities of biological processes, such as primary production, respiration, grazing etc. can be determined using an optimun principle. Especially
Microbial accumulation of iron and manganese in different aquatic environments: an electron optical study
This article presents a series of electron optical observations dealing with the mineralization of Fe and Mn by microorganisms in aquaticsystems associated with mine-waste systems and in terrestrial hot springs in Yellowstone National Park.
Protecting aquatic ecosystems in heavily allocated river systems : the case of the Oldman River Basin, Alberta
Alberta ; Aquatic ecosystem ; Canada ; Cultural policy ; Environmental conservation ; Irrigation ; Political ecology ; River basin ; Water ; Water management
Hydraulic and sedimentary controls on the availability and use of Atlantic salmon (Salmo salar) spawning habitat in the River Dee system, north-east Scotland
Aquatic ecosystem ; Biogeography ; Channel geometry ; Fish ; Habitat ; Scotland ; Stream ; United Kingdom
The hydraulic and sedimentary characteristics of the spawning habitat of Atlantic salmon (Salmon salar) in tributary and mainstem locations in a river system in north-east Scotland are described. Salmon used spawning sites with a relatively wide
is proposed as a potentially useful variable for describing the habitat of aquatic organisms.
Palu (Sulawesi): Problematik der Landnutzung in einem klimatischen Trockental am Aquator. (Palu, Sulawesi: problèmes de l'utilisation du sol dans une vallée sèche climatique à l'équateur)
Palu, situé au degré au-dessous de l'équateur a les plus basses précipitations de tout l'Archipel malais. Toute la région est couverte d'une savane sèche due à la prépondérance des systèmes de vents locaux, conditionnés par les hautes montagnes
Aquatic ecosystem ; Bank erosion ; Bibliography ; Biogeography ; Biogeomorphology ; Crustacea ; Habitat ; Impact ; Invasive species ; Sediment transport ; Stream
Sediment quantity and quality are key considerations in the sustainable management of fluvial systems. Increasing attention is being paid to the role of aquatic biota as geomorphic agents. This paper explores the mechanisms by which signal crayfish
Based on the non-diachronic nature of loess-paleosol sequences, a paleosol dating method is suggested. The origin of the modern Yellow River drainage system is studied. Correlation of loess, paleosol, and aquatic sediment sequences of China
The aim of this review is to survey recent research used to understand the impact of fire disturbance on hydrological systems : ecophysiology; aquatic biology; soils; water chemistry; seasonal effect of burning; land-use comparisons; experimental
Aquatic ecosystem ; Dammed lake ; European part of Russia ; Interannual variability ; Lake ; Moscow ; Seasonal variability ; Thermal regime ; Water temperature ; Years 1960-69 ; Years 1990-99
Sur la base de données de terrain sur quarante ans (1961-2000), on analyse le régime thermique des quatre principaux lacs de barrage de ce système hydraulique.
The Monegros desert and its saline wetlands, called saladas, are a unique European landscape of great scientific and ecological value. To depict changes in these natural systems, the AA. have identified 5 surface facies classes which are detectable
Analyse de système ; Cycle géochimique ; Ecologie appliquée ; Ecosystème ; Graphe ; Géochimie ; Géographie physique ; Milieu dulçaquatique ; Modèle ; Nuisance ; Pollution ; Système
of the comprehensive analysis are summarized in three synthetic ecosystem models formulated in graph form. The explanatory text first describes the input and state variables of the atmospheric system (I) and its linkage with the adjacent systems II and III. The second
Aerial photography ; Arizona ; Baja California ; Biodiversity ; Channel geometry ; Colorado ; Geographical information system ; Hydraulic works ; Hydrological regime ; Mexico ; North America ; Photointerpretation ; Stream ; United States of America
Information System analysis to examine the planform channel response of the upper Colorado River delta (limitrophe reach) to this recently altered hydrology. It provides insight into how floods affect the channel system that provides the foundation for aquatic
Aquatic ecosystem ; Carrying capacity ; Ecosystem ; Environmental management ; Habitat ; Hydraulic works ; Longitudinal section ; North Carolina ; Spatial distribution ; Stream ; United States of America ; Woody debris
A 177 river km georeferenced aerial survey of in-channel large wood (LW) on the lower Roanoke River, North Carolina was conducted to determine LW dynamics and distributions on an eastern USA low-gradient large river. Results indicate a system
with approximately 75% of the LW available for transport either as detached individual LW or as LW in log jams. This study, paired with future research on transport mechanisms should provide resource managers and policymakers with options to better manage aquatic
Evaluation de la qualité des eaux d'après des indicateurs chimiques et biologiques : exemple de classification des indicateurs pour le système anse de Tchérémouchnyj-fleuve Iénisseï
Aquatic ecosystem ; Asian part of Russia ; Classification ; Eastern Siberia ; Ecosystem ; Hydrobiology ; Hydrochemistry ; Indicator ; Toxic product ; Water ; Water quality ; Yenisey
Etude analytique de la contamination d'invertébrés aquatiques par le lindane dans une rivière de Hesbaye. (Analytical study of the contaminsation of aquatic invertebrates by lindane in a river of Hesbaye)