steppe
{{short description|Ecoregion of plain grasslands without trees}}
{{wikt|steppe}}
{{About|the ecological zone type}}
{{mim|image1=BS climate.png|direction=vertical|caption1=Two types of steppes, classified by climate:{{legend|#FFDB63|Cold steppe climate}}{{legend|#F5A301|Hot steppe climate}}|image2=Eurasian steppe belt.jpg|caption2=The Great Eurasian Steppe (highlighted in {{Colorsample|#AAEEFF}} on the map), acted as a passageway for cultures across the vast Eurasian landmass.}}
In physical geography, a steppe ({{IPAc-en|s|t|ɛ|p}}) is an ecoregion characterized by grassland plains without closed forests except near rivers and lakes.
Compare:
{{cite book
| last1 = Chibilyov
| first1 = Alexander
| year = 2002
| chapter = Steppe and Forest-steppe
| editor1-last = Shahgedanova
| editor1-first = Maria
| title = The Physical Geography of Northern Eurasia
|url=https://books.google.com/books?id=3VznhD-4A_IC
| series = Oxford regional environments
| volume = 3
| edition = reprint
| location = Oxford
| publisher = Oxford University Press
| publication-date = 2003
| page = 248
| isbn = 978-0-19-823384-8
| access-date = 30 January 2020
| quote = There are many definitions of steppes. For example, Allan (1946) provides fifty-four definitions of this term. Stamp and Clark (1979) define steppes as 'mid-latitude areas dominated by herbaceous vegetation and termed locally steppes, prairies, pampas, high veldts, downland, etc.'
}}
Steppe biomes may include:
- the montane grasslands and shrublands biome
- the tropical and subtropical grasslands, savannas, and shrublands biome
- the temperate grasslands, savannas, and shrublands biome
A steppe is usually covered with grass and shrubs, depending on the season and latitude. The term steppe climate denotes a semi-arid climate, which is encountered in regions too dry to support a forest, but not dry enough to be a desert.{{Cite web|last=Costa|first=Daniel|date=2024|title=Steppe|url=https://www.britannica.com/science/steppe-grassland}}{{cite web | url=https://education.nationalgeographic.org/resource/steppe/ | title=Steppe }}
Steppes are usually characterized by a semi-arid or continental{{cn|date=October 2023}} climate. Temperature extremes can be recorded in the summer of up to {{convert|45|C|F|round= 5}} and in winter of down to {{convert|-55|C|F|round= 5}}. Besides this major seasonal difference, fluctuations between day and night are also significant: in both the highlands of Mongolia and northern Nevada, {{convert|30|C|F|round= 5}} can be reached during the day with sub-freezing readings at night.
Steppes average {{cvt|250-500|mm|in|0}} of annual precipitation and feature hot summers and cold winters when located in mid-latitudes. In addition to the precipitation level, its combination with potential evapotranspiration defines a steppe climate.
Classification
Steppe can be classified by climate:{{cite web|url=http://www.fs.usda.gov/land/pubs/ecoregions/ecoregions.html|title=Ecoregions of the United States-Ecological Subregions of the United States|publisher= U.S. Forest Service, U.S. Department of Agriculture|website= fs.usda.gov| access-date=25 October 2016}}
- Temperate steppe: the true steppe, found in continental climates{{fv|date=October 2023}} can be further subdivided, as in the Rocky Mountains Steppes
- Subtropical steppe: a similar association of plants occurring in the driest areas with a Mediterranean climate;{{fv|date=October 2023}} it usually has a short wet period
It can also be classified by vegetation type, e.g. shrub-steppe and alpine-steppe.
=Cold steppe=
The world's largest steppe region, often referred to as "the Great Steppe", is found in Eastern Europe and Central Asia, and neighbouring countries stretching from Ukraine in the west through Russia, Kazakhstan, Turkmenistan and Uzbekistan to the Altai, Koppet Dag and Tian Shan ranges in China. The Eurasian Steppe had a significant role in the spread of the horse, the wheel and Indo-European languages.{{cite book
|last1 = Anthony
|first1 = David W.
|author-link1 = David W. Anthony
|orig-date = 2007
|title = The Horse, the Wheel, and Language: How Bronze-Age Riders from the Eurasian Steppes Shaped the Modern World
|date = 15 August 2010
|url = https://books.google.com/books?id=nLIufwC4szwC
|edition = reprint
|location = Princeton
|publisher = Princeton University Press
|publication-date = 2010
|isbn = 978-0-691-14818-2
|access-date = 12 June 2022
|page = 240
|quote = [...] the critical era when innovative Proto-Indo-European dialects began to spread across the steppes.
}} In the Eurasian steppe, soils often consist of chernozem.
The inner parts of Anatolia in Turkey, Central Anatolia and East Anatolia in particular and also some parts of Southeast Anatolia, as well as much of Armenia and Iran are largely dominated by cold steppe.
The Pannonian Plain is another steppe region in Central Europe, centered in Hungary but also including portions of Slovakia, Poland, Ukraine, Romania, Serbia, Croatia, Slovenia, and Austria. Another large steppe area (prairie) is located in the central United States, western Canada and the northern part of Mexico. The shortgrass prairie steppe is the westernmost part of the Great Plains region. The Columbia Plateau in southern British Columbia, Oregon, Idaho, and Washington state, is an example of a steppe region in North America outside of the Great Plains.
In South America, cold steppe can be found in Patagonia and much of the high elevation regions east of the southern Andes.
Relatively small steppe areas can be found in the interior of the South Island of New Zealand.
In Australia, a moderately sized temperate steppe region exists in the northern and northwest regions of Victoria, extending to the southern and mid regions of New South Wales. This area borders the semi-arid and arid Australian Outback which is found farther inland on the continent.
=Subtropical steppe=
In Europe, some Mediterranean areas have a steppe-like vegetation, such as central Sicily in Italy, southern Portugal, parts of Greece in the southern Athens area,{{cite web |publisher=Hellenic National Meteorological Service |location=Greece |url=http://www.hnms.gr/hnms/english/climatology/climatology_region_diagrams_html?dr_city=Athens_Hellinikon&dr_region=ClimAttiki |title=Hellinikon |website=HNMS.gr |access-date=2013-09-08 |archive-url=https://web.archive.org/web/20070312064300/http://www.hnms.gr/hnms/english/climatology/climatology_region_diagrams_html?dr_city=Athens_Hellinikon&dr_region=ClimAttiki |archive-date=2007-03-12 |url-status=dead }} and central-eastern Spain, especially the southeastern coast (around Murcia), and places cut off from adequate moisture due to rain shadow effects such as Zaragoza.
In northern Africa, the Mediterranean area also hosts the same steppe-like vegetation, such as the Algerian-Moroccan Hautes Plaines and by extension the North Saharan steppe and woodlands.
In Asia, a subtropical steppe can be found in semi-arid lands that fringe the Thar Desert of the Indian subcontinent as well as much of the Deccan Plateau in the rain shadow of the Western Ghats, and the Badia of the Levant.
In Australia, subtropical steppe can be found in a belt surrounding the most severe deserts of the continent and around the Musgrave Ranges.
In North America this environment is typical of transition areas between zones with a Mediterranean climate and true deserts, such as Reno, Nevada, the inner part of California, and much of western Texas and adjacent areas in Mexico.
Human impact
Humans have severe impacts on their environments. Among many examples the following two give only an impression.
- The formation of the forest steppe of Eastern Europe in the fourth millennium BC appeared in the context of the Trypillia culture and very probably, the economy of this culture with its large settlements contributed to the process.{{Cite journal |last=Kirleis |first=Wiebke |last2=Corso |first2=Marta Dal |last3=Pashkevych |first3=Galyna |last4=Schlütz |first4=Frank |last5=Hofmann |first5=Robert |last6=Terna |first6=Andreea |last7=Dreibrodt |first7=Stefan |last8=Rud |first8=Vitalii |last9=Videiko |first9=Mykhailo Y. |last10=Müller |first10=Johannes |date=2024-01-01 |title=A complex subsistence regime revealed for Cucuteni–Trypillia sites in Chalcolithic eastern Europe based on new and old macrobotanical data |url=https://link.springer.com/article/10.1007/s00334-023-00936-y |journal=Vegetation History and Archaeobotany |language=en |volume=33 |issue=1 |pages=75–90 |doi=10.1007/s00334-023-00936-y |issn=1617-6278}}
- The formation of the Błędów Desert in Poland in the Middle Ages was certainly man-made.{{Cite web |title=Ecology of a Mining Town: Evolution of Environment, Society and Economy from the Middle Ages to the Early Modern Period |url=https://www.roots-compass.org/welcome?project=23 |access-date=2025-01-29 |website=www.roots-compass.org}}
Naadam rider 2.jpg| Steppe in Mongolia
Steppe of western Kazakhstan in the early spring.jpg| Steppe in Kazakhstan
Чубовская степь.JPG|Steppe in Russia
Hortobágy.jpg|Steppe in Hungary
Patagonian plains argentina.jpg|Cold Patagonian steppe near Fitz Roy, Argentina
Prairie Alberta.jpg|Prairie in Alberta, Canada
2013-07-04 15 37 14 Sagebrush-steppe along U.S. Route 93 in central Elko County in Nevada.jpg|Sagebrush steppe in northeastern Nevada (U.S. Route 93)
West Texas Hwy 302 west of NoTrees.jpg| Steppe in West Texas
See also
References
{{reflist}}
=Sources=
- [http://www.hbw.com/lynx/en/lynx-edicions/monografias-naturaleza/MON0009-ecology-conservation-steppe-land-birds.html Ecology and Conservation of Steppe-land Birds] by Manuel B.Morales, Santi Mañosa, Jordi Camprodón, Gerard Bota. International Symposium on Ecology and Conservation of steppe-land birds. Lleida, Spain. December 2004.{{ISBN|978-84-87334-99-3}}
{{wikt | steppe}}
External links
{{Commons category|Steppes}}
- {{cite web|title=The Steppes|url=http://www.barrameda.com.ar/ecology/the-steppes.htm|publisher=barramedasoft.com.ar|date=1998–2008|access-date=2008-04-04}}
{{Vegetation}}
{{Earth's landforms}}
{{Biomes}}
{{Authority control}}
Category:Montane grasslands and shrublands