Northeast China Plain deciduous forests | |
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Ecology | |
Realm | Palearctic |
Biome | Temperate broadleaf and mixed forest |
Geography | |
Area | 232,500 km2 (89,800 sq mi) |
Countries | |
Coordinates | 43°25′N124°25′E / 43.417°N 124.417°E |
The Northeast China Plain deciduous forests ecoregion (WWF ID: PA0430) covers the flat interior Northeast China Plain and neighboring adjacent northwestern North Korea, in the region historically known as Manchuria. The plain is surrounded by mountains on the north and east, and supports some of China's largest forest tracts. There are also extensive low-lying wetlands, which support important bird populations. [1] [2]
The Northeast China Plain is the largest single plain in China, bordered by the Changbai Mountains on the border with North Korea to the east, and the Greater Khingan and Lesser Khingan mountains to the north. The southern half of the region is the watershed of the Liao River, which runs south into the Bohai Sea. [3]
The climate of the ecoregion is Humid continental climate, hot summer (Köppen climate classification (Dwa)), with a dry winter. This climate is characterized by large seasonal temperature differentials and a hot summer (at least one month averaging over 22 °C (72 °F)), and cold winters having monthly precipitation less than one-tenth of the wettest summer month. [4] [5]
The plain hosts extensive broadleaf deciduous forests, which trend into conifer forests on the northern edge. [1] Oaks are most common in the southern half of the region, accompanied by maple, elm and ash. Farther north, forests are characterized by Mongolian oak ( Quercus mongolica ) and Daurian birch ( Betula dahurica ). In drier areas, stands of sawtooth oak, ( Quercus acutissima ), dominate. Throughout, the plain is heavily converted to agriculture, taking advantage of the climate and the fertile chernozem soils.
The floodplain at the mouth of the Liao River is a large wetland that supports waterfowl, including the endangered Manchurian crane (Red-crowned crane).
Anyuysky National Park covers the basin of the Anyuy River, on the west slope of the Central Sikhote-Alin Mountain range in the Russian Far East. The Anyuy flows west into the Amur River, the main river of the region, as it flows northeast into the Sea of Okhotsk. The park is important because it creates an ecological corridor from the low floodplain of the Amur, to the high forested mountains of the Sikhote-Alin. The park is in the Nanaysky District in Khabarovsk Krai, about 50 miles downstream of the city of Khabarovsk. The area is remote, with few towns and sparse population. The area has historically depended on salmon fishing, logging, and hunting. The local indigenous people are the Nanai people, representing about a quarter of the nearby settlements.
Pleshcheyovo Ozero (Lake) National Park covers Lake Pleshcheyevo and surrounding areas in the Zalesye part of the Yaroslavl Oblast. The lake is highly popular for recreational use, as an ecological habitat, and is a former resort for the Russian tsars. The lake is located on the central part of the East European Plain, about 130 km northeast of Moscow, in the basin of the Upper Volga. On the southeast shore is the old town of Pereslavl-Zalessky, included in the Golden Ring of Russia.
Khingan Nature Reserve is a Russian 'zapovednik', located in the extreme south-east of the Amur River region of the Russian Far East. The reserve covers two types of habitat: the flat Arkharinskaya lowlands with abundant wetlands, and forested spurs of the Lesser Khingan mountains. In particular, Khingan Reserve was created to protect steppe and forest-steppe landscapes, and nesting sites of the endangered Red-crowned crane and the vulnerable White-naped crane. The reserve is situated in the Arkharinsky District of Amur Oblast.
Oka Nature Reserve is a Russian 'zapovednik' located in the Meschera lowlands, the floodplain of the Oka River and the Pra River. With extensive lowland rivers and forested peatlands, the reserve is an important area for waterfowl and waders. The reserve hosts breeding centers for bison and for crane. The site is situated in the Spassky District, Ryazan Oblast, about 60 km northeast of the city of Ryazan. In 1994, the "Flood plains of Rivers Pra and Oka" was designated a Ramsar wetland of international importance. The site was designated a UNESCO Man and Biosphere (MAB) reserve in 1978. The reserve was formally established in 1935, and covers an area of 55,722 ha (215.14 sq mi).
Mordovski Nature Reserve is a Russian 'zapovednik' in the north of the Republic of Mordovia, on the forested right bank of the Moksha River. It is in the transition zone of coniferous-deciduous forests and steppe. The reserve covers one-sixth of the Temnikovsky District of Mordovia. It was formally established in 1935, and covers a total area of 32,148 ha (124.12 sq mi). Its official name honors Pyotr Smidovich, a Soviet revolutionary and government official who was instrumental in establishing the Mordovsky Reserve.
The Okhotsk-Manchurian taiga ecoregion is an area of coniferous forests in the Russian Far East, covering the Amur River delta, the west coast of the Okhotsk Sea, and the rugged extension of the northern Sikhote-Alin Mountains that run southwest-to-northeast through the Primorsky and Khabarovsk regions. It is the southernmost taiga forest in Eurasia. The ecoregion is distinguished from surrounding ecoregions by the slightly warmer climate due to the maritime influence and the shield of the mountains to the west, and by the mixing of flora and fauna species from Okhotsk-Kamchatka communities to the north and Manchurian species from the south. The forest at lower altitudes is "light taiga", and "dark taiga" at higher altitudes.
The Da Hinggan-Dzhagdy Mountains conifer forests ecoregion covers the Greater Khingan Mountains of Northeast China, and across the border north into the Russian Far East where it follows the mountain ridge for another 500 km to the east. The mountain forests exhibit a floral community called "Daurian flora", a combination of the Siberian taiga to the north and the Manchurian floral types to the south. The eastern slopes are steep and drained by many rivers, the western slopes are gentler, and there are grasslands on some slopes. The ecoregion is in the Palearctic realm, with a subarctic climate. It covers 35,199,998 km2 (13,590,795 sq mi).
The Ussuri broadleaf and mixed forests ecoregion covers a mountainous areas above the lower Amur River and Ussuri River in Primorsky Krai and Khabarovsk Krai in the Russian Far East. The ecoregion is in the Palearctic realm, with a Humid Continental climate. It covers 187,357 km2 (72,339 sq mi).
The Amur meadow steppe ecoregion is spread over two sections of the middle Amur River valley in the Russian Far East. The terrain is one of flat floodplains on alluvial soil. Due to high water table and frequent flooding, the area has remained relatively forest-free, and is today characterized by extensive wetlands of bogs and grasslands. The area remained ice-free during the Pleistocene glaciation, creating a refuge for many plant and animal species. It has an area of 123,283 square kilometres (47,600 sq mi).
Derman-Ostroh National Nature Park sits in a river valley that separates the southern edge of the Polesian Lowland, and the northern edge of the Podolian Upland in northwestern Ukraine. The terrain is a mixture of pine-oak forest and marshy river lowlands. The park is in the southernmost region of Rivne Raion, Rivne Oblast.
The Central China Loess Plateau Mixed Forests ecoregion covers an elongated plateau across north-central China, characterized by accumulated soils of wind-blown dust known as loess and glacial till. The yellowish soil imparts its color to the Yellow River and Yellow Sea downstream. The ecoregion is located west of the lower Yellow River basin and the North China Plain.
The Changbai Mountains mixed forests ecoregion covers the Changbai Mountains and surrounding foothills in China and North Korea. The region features extensive and naturally preserved deciduous and conifer forests. The region exhibits high biodiversity due to its relative isolation, temperate climate with high rainfall, and centrality to central Chinese, Siberian, and European floral communities. In 1979, a significant portion of the ecoregion was designated the Changbaishan Biosphere Reserve by UNESCO.
The Nenjiang River grassland ecoregion covers the low wetlands of the lower Nen River in northeast China. The region is known for supporting migratory and permanent nesting populations of a variety of migratory waterfowl, including six species of crane.
The Changjiang Plain evergreen forests ecoregion covers the plain of the Yangtze River (Changjiang) from where it leaves the mountains at the Three Gorges in the west, to the mouth of the Yangtze at the East China Sea. This plain is one of the most densely populated areas on Earth, and most of the original oak and conifer forests have long been converted to agriculture. Extensive wetlands, however, provide habitat for migratory waterfowl and for diverse aquatic species.
The Hainan Island monsoon rain forests ecoregion covers mountainous interior of Hainan Island in China. The tropical forests receive over 1,000 mm/year of rain, heavily concentrated in the summer rainy season. The island has high levels of biodiversity, with over 4,200 plant species, 630 of which are endemic to the island. The region is under ecological pressure from deforestation for agriculture and timber extraction.
The Qin Ling Mountains deciduous forests ecoregion covers the Qin Mountains, which run west-to-east across central China. The mountains effectively divide the biological regions of China into north and south. To the north is the Yellow River basin, a loess-soil region of temperate deciduous forests. To the south is the Yangtze River basic, a subtropical forest region. In between, the Qin Mountains support many rare and endemic species, including the Giant panda and the Sichuan snub-nosed monkey.
The Jiang Nan subtropical evergreen forests ecoregion covers the mountainous divide between the lower Yangtze River and the coastal plain of South China. The region is also a climatic divide between the temperate valleys of the north and the subtropical forests of the south. The region is important for biodiversity and endemic species. The rugged limestone karst hills have been relatively protected from conversion to agriculture, and support specialized plant and animal communities.
The Manchurian mixed forests ecoregion covers the forested hills surrounding the river plains of northern China, Russia, North Korea, and South Korea. The ecoregion supports a number of rare species due to the relative isolation, the diversity of habitat, with mixed forests of deciduous Mongolian oak and conifers of Korean pine. Because mountains rise above the region on three sides, with plains and wetlands below, the area supports high biodiversity as a transition zone.
The Central Asian riparian woodlands ecoregion is spread out across the deserts and plains of central Asia between the Aral Sea and the mountains 2,000 kilometres (1,200 mi) to the east. The long narrow components of the ecoregion follow the large rivers fed by snowmelt, and provide critical habitat for migratory birds as they travel through the arid region. The vegetation is referred to as tugai, characterized by low tangles of trees and brush along the edges of the rivers and associated wetlands, and fed by groundwater instead of precipitation.
The Hokkaidō deciduous forests ecoregion covers the northern and southern coasts of the island of Hokkaido, the northernmost of the main islands of Japan. The region sits in the transition zone between the colder subarctic forests to the north and the more temperate forests to the south. Characteristic trees include Mongolian oak, Basswood, and Ash trees.