Spatio-temporal differentiation of landscape ecologicalniche in western ecological frangible region : a case study of Yan'an region in northwestern China
Arid area ; China ; Ecologicalniche ; Ecosystem ; Landscape ecology ; Model ; Shaanxi ; Spatial analysis ; Statistics
The AA. attempt here to put forward a conception of landscape ecologicalniche, enlightened by the international scholars on extending the ecologicalniche theory from spatial to functional niche. The results show that from 1987 to 2000, towards
Yan'an region, spatial attribute value of landscape ecologicalniche changes with an obvious increment, and functional attribute value change with a little increment, both of which enhance the regional landscape ecologicalniche. Towards each county
, spatial attribute value of landscape ecologicalniche increases to different extent while functional attribute value changes dissimilarly with an increment or a decrement.
Human ecologists have recently adopted a concept of niche as developed by Hutchinson (1957) that has become useful and operational in the study of human social behavior. This article extends this theory of niche by showing that the occupation
of a human niche should theoretically grow in a logistic fashion, and that four empirical data sets conform to the expectation of logistic growth. Three patterns, all variants of a logistic curve, are recognized: the formative, S-shaped, and mature.
The author emphasizes some of the operational difficulties of defining the ecologicalniche of a species in field conditions. The difficulty of singling out the relevant parameters (from the species viewpoint) is particularly great. A parallel
Applied ecology ; China ; Ecologicalniche ; Economic development ; Environmental conservation ; Environmental management ; Henan ; Town ; Urban ecology
Années 1994-2003 ; Chine ; Développement économique ; Ecologie appliquée ; Ecologie urbaine ; Gestion de l'environnement ; Henan ; Niche écologique ; Protection de l'environnement ; Ville
This paper describes a study concerning different functional modules of Kaifeng city urban ecosystem. Niche theory and techniques were used to analyze the changes of these functional modules in the period 1994-2003. This study may contribute
The distribution in space and the propensity to be associated with other plants species, can well be considered as important dimensions of the ecologicalniche of a plant. This is demonstrated by the results obtained during a vegetation survey
Les passereaux étant très rares dans les documents paléontologiques du Tertiaire inférieur, l'A. suggère que leurs niches écologiques étaient occupées par des espèces de petit format que l'on trouvait alors en abondance dans les autres ordres
Argentina ; Biogeography ; Biological indicator ; Ecologicalniche ; Mollusca ; Pollution ; Water pollution
Argentine ; Bio-indicateur ; Biogéographie ; Mollusque ; Niche écologique ; Pollution ; Pollution de l'eau ; Rio de La Plata
Etude des mollusques d'eau douce comme bio-indicateurs, occupant des niches naturelles ou des niches artificielles dues à la pollution du Rio de la Plata. - (MZ)
Present biogeomorphic knowledge supports the hypothesis that abiotic-biotic feedbacks create characteristic modulated patterns of earth surface landforms, adjusting according to biological evolution in the long term and to ecological succession
in the short term. In this context, natural selection of organisms and ecological successions are considered to have the potential, in some cases, for extension to the physical world, including earth surface landforms. The extended evolutionary perspective
, that is intended to feed back to ecology and evolutionary biology, indicates the potential for change in the deep understanding of geomorphology to reflect evolutionary and ecological succession theories.
Biogeography ; Cartography ; Climatic variation ; Ecologicalniche ; Geographical information system ; Habitat ; Model ; Numerical data ; Vegetation ; Vegetation map
Biogéographie ; Carte de la végétation ; Cartographie ; Données numériques ; Habitat ; Modèle ; Niche écologique ; Système d'information géographique ; Variation climatique ; Végétation
This article discusses the development of predictive vegetation mapping especially in the context of remote sensing-based vegetation mapping. The A. will illustrate the dependence of predictive vegetation mapping on ecologicalniche theory, and show
Modelling the eco-cultural niche of giant chesnut trees : new insights into land use history in southern Switzerland through distribution analysis of a living heritage
Alps (The) ; Arboriculture ; Chestnut tree ; Cultural heritage ; Ecologicalniche ; Historical geography ; Regression analysis ; Switzerland ; Traditional agriculture
Agriculture traditionnelle ; Alpes ; Analyse de régression ; Arboriculture ; Châtaignier ; Géographie historique ; Héritage culturel ; Niche écologique ; Suisse ; Suisse du Sud
Utilisation d'un inventaire des châtaigniers géants de Suisse méridionale afin de reconstituer la niche éco-culturelle liée à leur culture sur le long terme et à leur protection. Approche rétrospective de modélisation logistique. Comparaison avec
Bioclimatology ; Ecologicalniche ; European part of Russia ; Forecast ; Palaeogeography ; Phytocenosis ; Plant cover ; Regional system ; River basin ; Soil ; Typology ; Volga
Bassin fluvial ; Bioclimatologie ; Couverture végétale ; Niche écologique ; Paléogéographie ; Phytocénose ; Prévision ; Russie d'Europe ; Sol ; Système régional ; Typologie ; Volga
Ce système est conçu comme un noyau de phytocénose des complexes naturels et comme base des reconstitutions paléogéographiques et des prévisions écologiques pour les paysages. Modélisation des niches climatiques et des unités phytocénologiques et
Biodiversity ; Biogeography ; Bird ; Ecologicalniche ; Ecosystem ; Human impact ; Island ; Pacific Region ; Population dynamics ; Taxonomy ; Theory
Action anthropique ; Biodiversité ; Biogéographie ; Dynamique des populations ; Ecosystème ; Ile ; Niche écologique ; Oiseau ; Pacifique ; Pacifique Est ; Taxonomie ; Théorie
, ecological characteristics, and role of immigration and extinction factors as regulators of the islands'species. The endemic nature of the pristine avifauna is interpreted as an indication of high stability over thousands of years. The A. wishes to assess
Applications and limitations of museum data for conservation and ecology, with particular attention to species distribution
Biodiversity ; Biogeography ; Data ; Data base ; Ecologicalniche ; Model ; Plant species ; Spatial distribution ; Statistical bias ; Taxonomy
Base de données ; Biais statistique ; Biodiversité ; Biogéographie ; Distribution spatiale ; Donnée ; Espèce animale ; Espèce végétale ; Modèle ; Museum ; Niche écologique ; Taxonomie
of their usefulness in conservation and ecology is timely.
Regional ecology and Middle America : teaching geography in a major Latin American program
The A. details his experience teaching a course on the Geography of Middle America and the search for an explicit niche for geographers in a large and competitive Latin American Studies program at the University of Texas-Austin.―(DWG)
not naturally occurred. Human activities often correspond to involuntary experiments which allow a better understanding of the biology of natural populations by confronting the same species to different ecological conditions.
Biodiversity ; Biogeography ; Climatic change ; Colorado ; Comparative study ; Ecologicalniche ; Montana ; Mountain ; National park ; Tundra ; United States of America ; Vegetation
The AA. test the relevance of niche and neutral theories of biogeography to alpine tundra change and assess the continuum and classification approaches to biogeographic description as tools to describe similarity. Two extensive studies of alpine