|
Ellenberg's Indicator Values
Indicator value is a term that has been used in the ecology of plants for two different indices. The older usage of the term refers to Ellenberg's indicator values from 1974, which are based on a simple ordinal classification of plants according to the position of their realized ecological niche along an environmental gradient.Ellenberg H. Zeigerwerte der Gefässpflanzen Mitteleuropas / H. Ellenberg // Scripta geobotanica. Göttingen, 1974. – Vol. 9. – 197 p. Since 1997, the term has also been used to refer to Dufrêne & Legendre's indicator value, which is a quantitative index measuring the statistical alliance of a species to any one of the classes in a classification of sites. According to Ellenberg Ellenberg's indicator values were the first model of bioindication proposed and applied to the flora of Central Europe, and they have a long tradition in interpretation and understanding of plant communities and their evolution. The latest edition of Ellenberg's indicator values ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecology
Ecology () is the study of the relationships between living organisms, including humans, and their physical environment. Ecology considers organisms at the individual, population, community, ecosystem, and biosphere level. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history. Ecology is a branch of biology, and it is not synonymous with environmentalism. Among other things, ecology is the study of: * The abundance, biomass, and distribution of organisms in the context of the environment * Life processes, antifragility, interactions, and adaptations * The movement of materials and energy through living communities * The successional development of ecosystems * Cooperation, competition, and predation within and between species * Patterns of biodiversity and its effect on ecosystem processes Ecology has practical applications in conservation biology, wetland management, natural resource managemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinz Ellenberg
Heinz Ellenberg (1 August 1913 in Harburg (Elbe) – 2 May 1997 in Göttingen) was a German biologist, botanist and ecologist. Ellenberg was an advocate of viewing ecological systems through holistic means. He developed 9–point scales for rating European plant preferences for light, temperature, continentality (geographic region), nutrients, soil moisture, pH, and salinity. Life Ellenberg's father (a school teacher) died during World War I in 1914. From 1920 to 1932 Ellenberg studied in Hanover, where his interest in local flora and fauna was established, and where he came in contact with Reinhold Tüxen. In 1932 he moved to Montpellier, where he started his studies of ecology under the direction of Swiss ecologist Josias Braun-Blanquet. Later he studied botany, zoology, chemistry and geology in Heidelberg, Hanover and Göttingen, where he obtained a doctorate in 1938 in Göttingen under Franz Firbas. After completing his doctorate he worked at the central office for ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Ecology")