This article will be permanently flagged as inappropriate and made unaccessible to everyone. Are you certain this article is inappropriate? Excessive Violence Sexual Content Political / Social
Email Address:
Article Id: WHEBN0015333741 Reproduction Date:
A phytochorion, in phytogeography, is a geographic area with a relatively uniform composition of plant species. Adjacent phytochoria do not usually have a sharp boundary, but rather a soft one, a transitional area in which many species from both regions overlap. The region of overlap is called a vegetation tension zone.
Several systems of classifying geographic areas where plants grow have been devised. Most systems are organized hierarchically, with the largest units subdivided into smaller geographic areas, which are made up of smaller floristic communities, and so on. Phytochoria are defined as areas possessing a large number of endemic taxons. Floristic kingdoms are characterized by a high degree of family endemism, floristic regions by a high degree of generic endemism, and floristic provinces by a high degree of species endemism. Systems of phytochoria have both significant similarities and differences with zoogeographic provinces, which follow the composition of mammal families, and with biogeographical provinces or terrestrial ecoregions, which take into account both plant and animal species.
The term phytochorion is especially associated with the classifications according to the methodology of Josias Braun-Blanquet, which is tied to the presence or absence of particular species.[1]
Taxonomic databases tend to be organized in ways which approximate floristic provinces, but which are more closely aligned to political boundaries, for example according to the World Geographical Scheme for Recording Plant Distributions.
Botanist Ronald Good identified six floristic kingdoms (Boreal or Holarctic, Neotropical, Paleotropical, South African, Australian, and Antarctic), the largest natural units he determined for flowering plants. Good's six kingdoms are subdivided into smaller units, called provinces. The Paleotropical kingdom is divided into three subkingdoms, which are each subdivided into floristic provinces. Each of the other five kingdoms are subdivided directly into provinces. There is a total of 37 floristic provinces. Almost all provinces are further subdivided into floristic regions.
Armen Takhtajan, in a widely used scheme that builds on Good's work, identified thirty-five floristic regions, each of which is subdivided into floristic provinces, of which there are 152 in all.
Sudan, Tanzania, South Africa, Somalia, Ethiopia
Geology, Biogeography, Ecology, Phytogeography, Biosphere
Sonora, Arizona, California, Colorado Desert, Mojave Desert
Evolution, Ecology, Biology, Biodiversity, Evolutionary biology
Borneo, Sumatra, Asia, Bali, Antarctica
Full Text Search Details...ING TERTIARY OF THE VALLE DE SANTA MARIA AND RIO CORRAL QUEMADO, CATAMARCA PROVINCE, ARGENTINA LARRY G. MARSHALL BRYAN PATTERSON T "L library OF TH£ A... ...ING TERTIARY OF THE VALLE DE SANTA MARIA AND RIO CORRAL QUEMADO, CATAMARCA PROVINCE, ARGENTINA FIELDIANA Geology Published by Field Museum of Natural... ...ING TERTIARY OF THE VALLE DE SANTA MARIA AND RIO CORRAL QUEMADO, CATAMARCA PROVINCE, ARGENTINA LARRY G. MARSHALL Assistant Curator of Fossil Mammals D... ...endix VI 75 Literature Cited 75 LIST OF ILLUSTRATIONS 1. Map of Catamarca Province, northwestern Argentina 2 2. Map ofsouthern part ofValle de Santa ... ... de Santa Maria and in the vicinity of Puerta de Corral Quemado, Catamarca Province, Argentina 9 6. Stahlecker's stratigraphic sections of Chiquimil a... ...tina. Am. Mus. Novit., no. 2559, 1-15. Solbrig, O. T. 1976. The origin and floristic affinities of the South American temperate desertand semidesert r...
Full Text Search Details........................ 64 4 Introduction The miombo woodlands, recognized for their floristic richness and widespread occurrence of the genera ... ...t Reserve Low High HIV Prevalence Tenure 13 Slide 3 1. Site Selection 1. Districts/provinces were classified as high/medium/low HIV prevalenc...
Full Text Search Details...nd lowland rain forest in Ecuador. I. The forest structure, physiognomy, and floristics. Journal of Ecology, 51: 567-601. Langdon, E. J. M. 1979. Yage... ....D. 550-1000) 61 Wari and Wari-Style Ceramics 61 Ocros-Style Ceramics of the Province of Paruro 63 Arahuay Ceramics 67 Qotakalli Ceramics 70 Ccoipa Ce... ...List of Maps 1-1. The Inca Empire in 1532 2 1-2. Department of Cuzco 4 1 -3. Province of Paruro 5 1-4. The research region 7 1-5. Test excavated sites... ...uence. It is the goal of this work to establish a ceramic chronology for the Province of Paruro (Department of Cuzco) and to use this chronolo- gy, al... ... and Research Methods In this work, the prehistoric ceramic sequence for the Province of Paruro is described and ana- lyzed. The investigation has dir... ...ion has direct implications for the cultural history of the Inca because the Province of Paruro is located immediately south of the city of Cuzco (Map...
Full Text Search Details...nd lowland rain forest in Ecuador. I. The forest structure, physiognomy, and floristics. Journal of Ecology, 51: 567-601. Langdon, E. J. M. 1979. Yage... ...n 22 Acknowledgment 23 Literature Cited 23 List of Illustrations 1 . Sichuan Province, showing sample sites 2 2. Vegetation at Wa Shan, Sichuan 3 3. V... ...uan, China Abstract Acollectionof amphibians and reptiles wasmade in Sichuan Province, P.R.C., in 1987 by a team from Chengdu Institute of Biology and... ...rom the type locality ofminimum (Doi Suthep) and adjacent areasof Chiang Mai Province, north- ern Thailand (fmnh 2 1 3933-38, 2 1 6077-83) have webbin... ...), and 1:4+4 (3) for larval pelodytoides from Yunnan. Larvae from Chiang Mai Province, Thailand (fmnh 212386, usnm 103402) have 1:3+3 (2, stages 26, 3... ...en starting. The geographic range of Amolops chunganensis extends from Gansu Province in the northwest to Fujian Province in the southeast; however, i...