Rumex Rupestris

	Rumex Rupestris ''Rumex rupestris'', commonly known as shore dock, is a species of flowering plant belonging to the family Polygonaceae. Its native range is Western Europeand is one of the world's rarest dock species.Lousley JE, Kent DH. 1981. ''Docks and Knotweeds of the British Isles''. BSBI Handbook No. 3. BSBI, London. Description ''R. rupestris'' is a coarse stout woody perennial measuring 30 – 50 cm (sometimes up to 70 cm) in height, with one or two shoots arising from the stock. The thick, dull bluish green leathery basal leaves are 10 – 30 cm long with entire, undulate leaf margins. They are oblong or broadly ovate-lanceolate shaped, narrowing rather abruptly to a truncate or subcordate base. The petiole is less than one third the length of the leaf blade. The stem leaves are oblong-lanceolate that gradually narrow to the base, with an acute leaf tip at the leaf end. The leaf margin is undulate, crenulate and subsessile. The inflorescence comprises a dense panicle with ascending br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Flowering Plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants that produce their seeds enclosed within a fruit. They are by far the most diverse group of land plants with 64 orders, 416 families, approximately 13,000 known genera and 300,000 known species. Angiosperms were formerly called Magnoliophyta (). Like gymnosperms, angiosperms are seed-producing plants. They are distinguished from gymnosperms by characteristics including flowers, endosperm within their seeds, and the production of fruits that contain the seeds. The ancestors of flowering plants diverged from the common ancestor of all living gymnosperms before the end of the Carboniferous, over 300 million years ago. The closest fossil relatives of flowering plants are uncertain and contentious. The earliest angiosperm fossils ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Metapopulations A metapopulation consists of a group of spatially separated populations of the same species which interact at some level. The term metapopulation was coined by Richard Levins in 1969 to describe a model of population dynamics of insect pests in agricultural fields, but the idea has been most broadly applied to species in naturally or artificially fragmented habitats. In Levins' own words, it consists of "a population of populations". A metapopulation is generally considered to consist of several distinct populations together with areas of suitable habitat which are currently unoccupied. In classical metapopulation theory, each population cycles in relative independence of the other populations and eventually goes extinct as a consequence of demographic stochasticity (fluctuations in population size due to random demographic events); the smaller the population, the more chances of inbreeding depression and prone to extinction. Although individual populations have finite life-spa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Bern Convention On The Conservation Of European Wildlife And Natural Habitats The Bern Convention on the Conservation of European Wildlife and Natural Habitats, also known as the Bern Convention (or Berne Convention), is a binding international legal instrument in the field of Nature Conservation, it covers the natural heritage in Europe, as well as in some African countries. The Convention was open for signature on 19 September 1979 and came into force on 1 June 1982. It is particularly concerned about protecting natural habitats and endangered species, including migratory species. Aims and objectives The convention has three main aims, which are stated in Article 1:Council of Europe, 1979. Convention on the Conservation of European Wildlife and Natural Heritage. Bern, Switzerland. Available at: http://conventions.coe.int/Treaty/EN/Treaties/Html/104.htm * to conserve wild flora and fauna and their natural habitats * to promote cooperation between states * to give particular attention to endangered and vulnerable species including endangered and vulner ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Habitats Directive The Habitats Directive (more formally known as Council Directive 92/43/EEC on the Conservation of natural habitats and of wild fauna and flora) is a directive adopted by the European Community in 1992 as a response to the Berne Convention. The European Community was reformed as the European Union the following year, but the directive is still recognised. The Habitats Directive required national governments to specify areas that are expected to be ensuring the conservation of flora and fauna species. This led to the setting up of a network of protected areas across the EU, along with 'Special Areas of Conservation', which together with the existing Special Protection Areas, became the so-called Natura 2000 network established to protect species and habitats. This directive is one of the main pillars of the European Union's system of wildlife and nature conservation, another being the Birds Directive. The Habitats Directive, together with the Birds Directive, are also called the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]