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The Circumboreal Region in phytogeography is a floristic region within the Holarctic Kingdom in Eurasia and North America, as delineated by such geobotanists as Josias Braun-Blanquet and Armen Takhtajan.
It is the largest floristic region in the world by area, comprising most of Canada, Alaska, Europe, Caucasus and Russia, as well as North Anatolia (as the southernmost part of the region) and parts of northern New England, Michigan, Minnesota, Wisconsin, and the Turtle Mountains of North Dakota. Northern portions of the region include polar desert, taiga [1] and tundra biomes. Many geobotanists divide Eurasian and North American areas into two distinct regions. The continents, however, share much of their boreal flora (e.g. Betula nana , Alnus viridis , Vaccinium vitis-idaea , Arctostaphylos uva-ursi ). The flora was severely impoverished during glaciations in the Pleistocene. The region is bordered by Eastern Asiatic, North American Atlantic, Rocky Mountain, Mediterranean and Irano-Turanian Regions.
There are no biological families endemic to this region, but it has endemic genera (e.g. Lunaria , Borodinia , Gorodkovia , Redowskia , Soldanella , Physospermum , Astrantia , Thorella , Pulmonaria , Erinus , Ramonda , Haberlea , Stratiotes , Telekia ) and many endemic species, especially in the mountains.
It is subdivided into a number of floristic provinces. Their delineation is debatable. According to a version of Takhtajan's classification, these are the Arctic, Atlantic European, Central European, Illyrian, Euxinian, Caucasian, Eastern European, Northern European, West Siberian, Altai-Sayan, Central Siberian, Transbaikalian, Northeastern Siberian, Okhotsk-Kamtchatkan and Canadian Provinces.
Caryophyllaceae, commonly called the pink family or carnation family, is a family of flowering plants. It is included in the dicotyledon order Caryophyllales in the APG III system, alongside 33 other families, including Amaranthaceae, Cactaceae, and Polygonaceae. It is a large family, with 81 genera and about 2,625 known species.
Saxifraga is the largest genus in the family Saxifragaceae, containing about 473 species of holarctic perennial plants, known as saxifrages or rockfoils. The Latin word saxifraga means literally "stone-breaker", from Latin saxum + frangere. It is usually thought to indicate a medicinal use for treatment of urinary calculi, rather than breaking rocks apart.
There are over 190 vascular plant species on the Norwegian Arctic archipelago of Svalbard. This figure does not include algae, mosses, and lichens, which are non-vascular plants. For an island so far north, this number of species constitutes an astonishing variety of plant life. Because of the harsh climate and the short growing season, all the plants are slow growing. They seldom grow higher than 10 cm (4 in)
The Western Himalayan alpine shrub and meadows is a montane grasslands and shrublands ecoregion of Nepal, India, and Tibet, which lies between the tree line and snow line in the western portion of the Himalaya Range.
The Orto Botanico di Bergamo "Lorenzo Rota" is a botanical garden located at the top of a long stairway from Scaletta di Colle Aperto, Bergamo, Lombardy, Italy. It is open daily during the warmer months.
The Giardino Botanico Alpinia is a botanical garden specializing in alpine plants, located at 800 m altitude above Stresa on Lake Maggiore, Province of Verbano-Cusio-Ossola, Piedmont, Italy. It can be reached via the Lido di Carciano - Alpino - Mottarone cable car, and is open daily in the warmer months.
The International Tundra Experiment (ITEX) is a long-term international collaboration of researchers examining the responses of arctic and alpine plants and ecosystems to climate change. Researchers measure plant responses to standardized, small-scale passive warming, snow manipulations, and nutrient additions. Researchers use small open-top chambers (OTCs) to passively increase mean air temperature by 1-2 °C. The ITEX approach has been validated by tundra responses at the plot level. The network has published meta-analyses on plant phenology, growth, and reproduction, composition and abundance, and carbon flux. The ITEX network consists of more than 50 sites in polar and alpine locations around the world.
The Grigna is a mountain massif in the province of Lecco, Lombardy, northern Italy, with an elevation of 2,410 metres (7,907 ft). It is part of the Bergamo Alps, and it has two peaks, Grignone or Grigna settentrionale(2,410m), the higher Northern, and the lower, Southern Grignetta or Grigna meridionale (2,184 m).
Catabrosa is a small but widespread genus of plants in the grass family native to temperate areas of Eurasia, the Americas, and a few places in Africa.
The Northwestern Himalayan alpine shrub and meadows is a montane grasslands and shrublands ecoregion of the elevations of the northwestern Himalaya of China, India, and Pakistan.
The flora of Lebanon includes approximately 2,600 plant species. Situated on the eastern coast of the Mediterranean Basin, Lebanon is a reservoir of plant diversity and one of the world's biodiversity hotspots for conservation priorities. Endemic species constitute 12% of the Lebanese flora; 221 plant species are broad endemics and 90 are narrow endemics. Important Plant Areas (IPAs) featuring the country exceptional botanical richness were defined in 2018.
The wildlife of South Korea includes 8,271 plant species, 18,117 animal species and 3,528 species of fungi and others. 30,000 species are known to exist in South Korea, but it is estimated that there are more than 100,000 species.
Tusheti Strict Nature Reserve is located in the Tusheti Mountainous region in the north-eastern part of Georgia. Visitors center is located in village lower Alvani, Akhmeta Municipality.
Located in the Scandinavian Peninsula, Sweden is a mountainous country dominated by lakes and forests. Its habitats include mountain heath, montane forests, tundra, taiga, beech forests, rivers, lakes, bogs, brackish, marine coasts, and cultivated land. The climate of Sweden is mild for a country at this latitude, largely owing to the significant maritime influence.