ST Study of fluoride absorption by plant in soil-plant ecological system
La distribution anormale dans le milieu naturel peut provoquer des problèmes de santé. L'empoisonnement local par la fluorine se fait par l'eau potable et l'alimentation. L'A. a mesuré la teneur en fluorine du sol, des céréales et des légumes. - (WY)
Cette étude se propose d'analyser la structure spatiale de 22 variables, mesurées à l'échelle des districts de recensement, qui concernent l'utilisation du sol, la population, l'économie et la société urbaines. Ces variables sont soumises à une
Ecological factors in the development of intensive management ecosystems in the midwestern United States
mesurés pour 3stades de développement: 1. Passage de la végétation naturelle à l'agriculture préintensive (1833-1934)| 2. Intensification de l'agriculture associée aux apports chimiques et à la mécanisation (1934-1948)| et 3. Récents déplacements dans la
carte et un lieu, la représentativité des indices géo-écologiques et géographiques mesurés en eux, la minimisation de la dépendance de leurs valeurs par rapport aux conditions géotopologiques locales. Le problème est résolu conformément au principe
The paper includes the following chapters : 1. Political ecology : all things to all people ? 2. Issues, narratives and epistemologies. 3. Disjunctures. 4. Cartography of political ecology. 5. Analytical narratives for political ecology. 6. Post
Concept ; Denmark ; Ecology ; Geographic school ; Geography ; Human ecology ; Land use ; Landscape ; Landscape structure ; Sustainable development
The tradition of geography as human ecology introduced to Danish geography by Sofus Christiansen is taken as a departure for an evaluation of present endeavour to promote geography as landscape ecology. The modest role in human ecology of human
adaptation to landscape structure and dynamics is stressed. The challenge for geography in the development of a transdisciplinary landscape ecology as foundation for the planning and management of landscape ecological aspects of local and regional
Method for calculating ecological water storage and ecological water requirement of marsh
Applied ecology ; Bog ; China ; Humid environment ; Jilin ; Water management ; Water needs ; Water resources
In this study, the definition and connotation of the ecological water storage of marsh is discussed, and its distinction and relationship with ecological water requirement are also analyzed. Furthermore, the gist and method of calculating ecological
water storage and ecological water requirement have been provided, and Momoge wetland, (located in Zhenlai county, Jilin Province, China), has been given as an example of calculation of the two variables. Ecological water use of marsh can be ascertained
according to ecological water storage and ecological water requirement.
Human geography and the new ecology: the prospect and promise of integration
Biodiversity ; Concept ; Ecology ; Environment ; Human geography ; Man-environment relations ; Research
The new ecology underscores the role of nonequilibrium conditions in biophysical environments, a reorientation of biological ecology based in part of biogeography. Its implications for the analysis of these environments are described. Certain key
The A. discusses the application of landscape ecological principles to a specific and pressing issue: nature reserve design and functioning. He reviews 5 landscape ecological themes with relevance to reserve design and management. He studies
: the role that landscape ecological theories may have in integrating existing principles from applied biogeography and population biology; the unique insights provided by a landscape ecological approach. Finally, he argues that biogeographers need to be more
active in the development and advancement of landscape ecological theory.
Applied ecology ; Ecotone ; Hungary ; Land use ; Outer conurbation area ; Urban area ; Urban ecology ; Urban fringe
Besides the investigations into the basic elements of the ecological spatial networks : the ecological matrix areas, corridors of barriers and also the biocores and buffer zones, the analysis of the edge-zones, the so-called ecotons
, is an increasingly popular topic of landscape ecology. The ecological role of the edge zones is proportional to the contrast between the ecological properties of the areas they separate. The ecological contrast is the sharpest possible round the town outskirts. - (ZK)
Following the previous report on this subject, published in 2007, there has been a very substantial increase in publications relevant to landscape ecology. The continuing identity crisis of landscape ecology is described and recent literature
in the field is then summarized under the following headings : Landscape ecology and climate research; Alternatives to fragmentation and the patch-based model - the links between pattern and process; Fragmentation research; Methodology and techniques
in landscape ecology; and Connectivity and graph theoretical approaches. The review concludes that landscape ecology now represents one important focus within biogeography, linked to ecological biogeography, and takes its place alongside other key foci
Spatio-temporal differentiation of landscape ecological niche in western ecological frangible region : a case study of Yan'an region in northwestern China
Arid area ; China ; Ecological niche ; Ecosystem ; Landscape ecology ; Model ; Shaanxi ; Spatial analysis ; Statistics
The AA. attempt here to put forward a conception of landscape ecological niche, enlightened by the international scholars on extending the ecological niche theory from spatial to functional niche. The results show that from 1987 to 2000, towards
Yan'an region, spatial attribute value of landscape ecological niche changes with an obvious increment, and functional attribute value change with a little increment, both of which enhance the regional landscape ecological niche. Towards each county
, spatial attribute value of landscape ecological niche increases to different extent while functional attribute value changes dissimilarly with an increment or a decrement.
Applied ecology ; Concept ; Ecological crisis ; Ecology ; Environment ; Epistemology ; Global environment ; History of sciences ; Human ecology ; Ideology ; Philosophy of sciences ; Value system
Geookologie - Geowissenschaftliche Aspekte der Okologie. Geoecology. Geoscientific aspects of Ecology
Environmental research nowadays is an interdisciplinar problem. 15 famous authors from the G.D.R. write on following problems : conditions of production and ecology, global ecological relationships, soils, noosphere as life and activity field
The future of ecological evaluation for land use planning: the case of Belgium
Supplement and up-to-date extension to earlier papers on ecological evaluation for planning purposes. Scientific, strategic and political objections against ecological evaluation in its present shape are discussed. Recent Belgian developments.
Ecology of lacusts and grasshoppers (Orthoptera, Acrididae) in Sudanese West Africa. I. Discriminant factors and ecological requirements of acridian species
The progress and perspectives of landscape ecology in China
China ; Concept ; Ecology ; Environmental management ; History of sciences ; Land use ; Landscape dynamics ; Landscape ecology ; Methodology ; Model
The major progress of landscape ecology in China was in the fields of land-use structure and ecological processes, landscape pattern and dynamics analysis, theoretical and methodological development, and landscape ecological applications. After
Ecological footprint analysis based on RS and GIS in arid land
Arid area ; China ; Concept ; Ecology ; Forecast ; Gansu ; Geographical information system ; Methodology ; Model ; Sustainable development
The ecological footprint (EF) is a kind of concise method of quantifiably measuring the natural capital consumption and it can reflect the goal of sustainability. In this paper, the concept, the theory and method of ecological footprint
are introduced. On this basis, the study brings forward the method of ecological footprint and capacity prediction. Models and methods are employed to calculate EF and EC (ecological capacity) in 1995 and 2000 and predict them in 2005 in Hexi Corridor (northwest