1,721,606 research outputs found
Ionengehalte halophiler Pflanzen Spaniens : mit 5 Tabellen und 1 Abbildung im Text : aus dem Institut für Pharmazeutische Biologie der Universität Bonn
No full textvon Siegmar-W. Breckle, Bon
The Ontogenesis of the Salt Glands of Limonium (Plumbaginaceae)
No full textWiehe W, Breckle S-W. Die Ontogenese der Salzdrüsen von Limonium (Plumbaginaceae). Botanica Acta. 1990;103(1):107-110
Salt Secretion in some Chenopodium Species
No full textReimann C, Breckle S-W. Salt Secretion in some Chenopodium Species. Flora. 1988;180(3-4):289-296
Anatomy and Development of Bladder Hairs in Chenopodium Species
No full textReimann C, Breckle S-W. Anatomie und Entwicklung der Blasenhaare von Chenopodium-Arten. Flora. 1988;180(3-4):275-288
Distribution and ecology of Cystopteris (Athyriaceae) species within the Flora Iranica region
No full textBreckle S-W. Distribution and ecology of Cystopteris (Athyriaceae) species within the Flora Iranica region. Plant Systematics and Evolution. 1987;155(1-4):59-65
Beiträge des Symposiums "Schwermetalle und saure Depositionen"
No full textBreckle S-W, Kahle H, eds. Beiträge des Symposiums "Schwermetalle und saure Depositionen". Bielefelder ökologische Beiträge. Vol 1. Bielefeld: Abteilung Ökologie und ZiF der Universität; 1985
Studies on Storage Substances in Thorny Cushions from High Mountains in Crete (Greece)
No full textHöner D, Breckle S-W. Untersuchungen zum Speicherstoff-Gehalt der Dornpolster in den Hochgebirgslagen Kretas (Griechenland). Flora. 1986;178(5):297-305
Beiträge des Symposiums Komplexschäden an Buchen, Ursachenforschung zum Baumsterben
No full textBreckle S-W, Kahle H, eds. Beiträge des Symposiums Komplexschäden an Buchen, Ursachenforschung zum Baumsterben. Bielefelder ökologische Beiträge. Vol 5. Bielefeld: Abt. Ökologie der Universiät; 1989
Differences in responses of various radish roots to salinity
No full textWaisel Y, Breckle S-W. Differences in responses of various radish roots to salinity. Plant and Soil. 1987;104(2):191-194
Tree Diversity, Forest Structure and Productivity along Altitudinal and Topographical Gradients in a Species-Rich Ecuadorian Montane Rain Forest
No full textHomeier J, Breckle S-W, Günter S, Rollenbeck RT, Leuschner C. Tree Diversity, Forest Structure and Productivity along Altitudinal and Topographical Gradients in a Species-Rich Ecuadorian Montane Rain Forest. Biotropica. 2010;42(2):140-148.We studied the spatial heterogeneity of tree diversity, and of forest structure and productivity in a highly diverse tropical mountain area in southern Ecuador with the aim of understanding the causes of the large variation in these parameters. Two major environmental gradients, elevation and topography, representing a broad range of climatic and edaphic site conditions, were analyzed. We found the highest species richness of trees in valleys <2100 m. Valleys showed highest values of basal area, leaf area index and tree basal area increment as well. Tree diversity also increased from ridges to valleys, while canopy openness decreased. Significant relationships existed between tree diversity and soil parameters (pH, total contents of Mg, K, Ca, N and P), and between diversity and the spatial variability of pH and Ca and Mg contents suggesting a dependence of tree diversity on both absolute levels and on the small-scale heterogeneity of soil nutrient availability. Tree diversity and basal area increment were positively correlated, partly because both are similarly affected by soil conditions. We conclude that the extraordinarily high tree species richness in the area is primarily caused by three factors: (1) the existence of steep altitudinal and topographic gradients in a rather limited area creating a small-scale mosaic of edaphically different habitats; (2) the intermingling of Amazonian lowland plant species, that reach their upper distribution limits, and of montane forest species; and (3) the geographical position of the study area between the humid eastern Andean slope and the dry interandean forests of South Ecuador
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