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Kopet Dag Semi-desert
The Kopet Dag semi-desert ecoregion (WWF ID: PA1319) is a small ecoregion that crosses the border of southwestern Turkmenistan into northeastern Iran. It covers a transition zone between the deserts to the north and west, and the foothill steppes and woodlands in the higher Kopet Dag mountains to the east and the Alborz Mountains to the south. The terrain is mostly barren semi-desert and widespread 'takir', a type of seasonal salt flat or dried clay deposit in an interdune depression. Location and description The region is mostly at a low altitude along the base of the mountains, particularly in a 20 km wide strip of cultivated land that reaches 300 km east to the capital city of Ashgabat. The Caspian lowland desert ecoregion occupies a 20 km wide strip of land between the Kopet Dag semi-desert and the Caspian Sea. To the north is another desert, the Central Asian southern desert. To the south are the Kopet Dag woodlands and forest steppe ecoregion, and the Caspian Hyrcanian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palearctic
The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Siberian region; the Mediterranean Basin; the Sahara and Arabian Deserts; and Western, Central and East Asia. The Palaearctic realm also has numerous rivers and lakes, forming several freshwater ecoregions. The term 'Palearctic' was first used in the 19th century, and is still in use as the basis for zoogeographic classification. History In an 1858 paper for the ''Proceedings of the Linnean Society'', British zoologist Philip Sclater first identified six terrestrial zoogeographic realms of the world: Palaearctic, Aethiopian/Afrotropic, Indian/Indomalayan, Australasian, Nearctic, and Neotropical. The six indicated general groupings of fauna, based on shared biogeography and large-scale geographic barriers to migration. Alfred Wallace a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Asian Southern Desert
The Central Asian southern desert ecoregion (WWF ID: PA1312) is an arid but ecologically active region between the east coast of the Caspian Sea and steppes at the base of the mountains of central Asia. Most of Turkmenistan and eastern Uzbekistan is in this ecoregion. The winters are milder than in the cold desert to the north (the Central Asian northern desert ecoregion), and a large number of endemic species have adapted to living in the particular climate and soil of the region. As with sandy deserts in general, the region is notable for high numbers of endemic species of reptiles and insects. Location and description The ecoregion covers the arid territory from the Caspian Sea on the west, almost to the Pamir-Alay Mountains to the east. Most of Turkmenistan and the eastern half of Uzbekistan is this region. Covered are the coastal plains of the Caspian, the Krasnovodsk and Ustyurt Plateaus of northwest Turkmenistan, the Karakum Desert ('Black Sand' desert) of central Tur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecoregions Of Iran
An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of land or water, and contain characteristic, geographically distinct assemblages of natural communities and species. The biodiversity of flora, fauna and ecosystems that characterise an ecoregion tends to be distinct from that of other ecoregions. In theory, biodiversity or conservation ecoregions are relatively large areas of land or water where the probability of encountering different species and communities at any given point remains relatively constant, within an acceptable range of variation (largely undefined at this point). Three caveats are appropriate for all bio-geographic mapping approaches. Firstly, no single bio-geographic framework is optimal for all taxa. Ecoregions reflect the best compromise for as many taxa as possible. Sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golestan National Park
Golestan National Park ( fa, پارک ملی گلستان), commonly known as the Golestan Jungle (), is an Iranian National Park in Golestan Province, northeastern Iran. Geography The park is located in the eastern Alborz (Elburs) Mountains range and the western edge of the Kopet Dag range. It comprises 91,890 ha. Elevations in the park range from above sea level. Ecology Golestan National Park has a variety of habitats, such as temperate broad leaf forests, grasslands, shrublands and rocky areas. The diverse flora includes stands of white '' Eremurus kopetdaghensis'', '' Iris acutiloba subsp. lineolata'' and '' Iris kopetdagensis''. The fauna is very rich and consists of Persian leopards (''Panthera pardus ciscaucasica''), Indian wolves (''Canis lupus pallipes''), brown bear (''Ursus arctos''), golden jackal (''Canis aureus''), wild boars (''Sus scrofa''), maral deer (''Cervus elaphus maral''), roe deer (''Capreolus capreolus''), urial (''Ovis orientalis arkal''), w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evapotranspiration
Evapotranspiration (ET) is the combined processes by which water moves from the earth’s surface into the atmosphere. It covers both water evaporation (movement of water to the air directly from soil, canopies, and water bodies) and transpiration (movement of water from the soil, through roots and bodies of vegetation, on leaves and then into the air). Evapotranspiration is an important part of the local water cycle and climate, as well as measurement of it plays a key role in agricultural irrigation and water resource management. Definition Evapotranspiration is a combination of evaporation and transpiration, measured in order to better understand crop water requirements, irrigation scheduling, and watershed management. The two key components of evapotranspiration are: * Evaporation: the movement of water directly to the air from sources such as the soil and water bodies. It can be affected by factors including heat, humidity, and wind speed. * Transpiration: the move ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semi-arid Climate
A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type. It is located on regions that receive precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes. Defining attributes of semi-arid climates A more precise definition is given by the Köppen climate classification, which treats steppe climates (''BSk'' and ''BSh'') as intermediates between desert climates (BW) and humid climates (A, C, D) in ecological characteristics and agricultural potential. Semi-arid climates tend to support short, thorny or scrubby vegetation and are usually dominated by either grasses or shrubs as it usually can't support forests. To determine if a location has a semi-arid climate, the precipitation threshold must first be determined. The method used to find the precipitation threshold (in millimeters): *multiply by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, the climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semi-arid Climate
A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type. It is located on regions that receive precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes. Defining attributes of semi-arid climates A more precise definition is given by the Köppen climate classification, which treats steppe climates (''BSk'' and ''BSh'') as intermediates between desert climates (BW) and humid climates (A, C, D) in ecological characteristics and agricultural potential. Semi-arid climates tend to support short, thorny or scrubby vegetation and are usually dominated by either grasses or shrubs as it usually can't support forests. To determine if a location has a semi-arid climate, the precipitation threshold must first be determined. The method used to find the precipitation threshold (in millimeters): *multiply by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caspian Hyrcanian Mixed Forests
The Hyrcanian forests ( fa, جنگل های هیرکانی) are a zone of lush lowland and montane forests covering about adjoining the shores of the Caspian Sea of Iran and part of that of Azerbaijan. The forest is named after the ancient region of Hyrcania. In the World Wildlife Fund categorization, the ecoregion is referred to as the Caspian Hyrcanian mixed forests. Since 5 July 2019, the Hyrcanian Forests have been designated a UNESCO World Heritage Site. Geography In Iran, the Hyrcanian ecoregion comprises a long strip along the southern coast of the Caspian Sea and the northern slopes of the Alborz mountains. It covers parts of five provinces, from east to west: North Khorasan Province, North Khorasan, Golestan Province, Golestan ( being its south and southwest plus eastern regions of the Gorgan plain), Mazandaran Province, Mazandaran, Gilan Province, Gilan and Ardabil Province, Ardabil. The Golestan National Park spans the boundary of Golestan and Mazandaran provinces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kopet Dag Woodlands And Forest Steppe
The Kopet Dag woodlands and forest steppe ecoregion (WWF ID: PA1008) coincides with the Kopet Dag mountains, straddling the southern border of Turkmenistan and the northeastern border of Iran. The region is one of high biodiversity, as it includes a full range of altitude zones (from semi-desert low hills at to rocky heights over ), and variety of habitats included juniper-wooded slopes, montane grasslands, and tugay (riverine thickets). Location and description The region begins at the western foothills of the Kopet Dag, about 100 km east of the Caspian Sea. It stretches for 650 km from northwest to southeast, with the Turkmenistan-Iran border running mostly down the main central ridge, and ends at the border with Afghanistan. The region is only about 100 km wide. The Kopet Dag semi-desert ecoregion wraps around the western third of the ecoregion, the Central Asian southern desert ecoregions lies to the rest of the north, and the Central Persian desert basins ecoregion to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caspian Sea
The Caspian Sea is the world's largest inland body of water, often described as the world's largest lake or a full-fledged sea. An endorheic basin, it lies between Europe and Asia; east of the Caucasus, west of the broad steppe of Central Asia, south of the fertile plains of Southern Russia in Eastern Europe, and north of the mountainous Iranian Plateau of Western Asia. It covers a surface area of (excluding the highly saline lagoon of Garabogazköl to its east) and a volume of . It has a salinity of approximately 1.2% (12 g/L), about a third of the salinity of average seawater. It is bounded by Kazakhstan to the northeast, Russia to the northwest, Azerbaijan to the southwest, Iran to the south, and Turkmenistan to the southeast. The sea stretches nearly from north to south, with an average width of . Its gross coverage is and the surface is about below sea level. Its main freshwater inflow, Europe's longest river, the Volga, enters at the shallow north end. Two deep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deserts And Xeric Shrublands
Deserts and xeric shrublands are a biome defined by the World Wide Fund for Nature. Deserts and xeric (ancient Greek xērós, “dry") shrublands form the largest terrestrial biome, covering 19% of Earth's land surface area. Ecoregions in this habitat type vary greatly in the amount of annual rainfall they receive, usually less than annually except in the margins. Generally evaporation exceeds rainfall in these ecoregions. Temperature variability is also diverse in these lands. Many deserts, such as the Sahara, are hot year-round, but others, such as East Asia's Gobi, become quite cold in winter. Temperature extremes are a characteristic of most deserts. High daytime temperatures give way to cold nights because there is no insulation provided by humidity and cloud cover. The diversity of climatic conditions, though quite harsh, supports a rich array of habitats. Many of these habitats are ephemeral in nature, reflecting the paucity and seasonality of available water. Woody-ste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
