Aral Sea in the context of "Oghuz Turks"

An ecosystem, short for ecological system, is defined as a collection of interacting organisms within a biophysical environment. Ecosystems are never static, and are continually subject to both stabilizing and destabilizing processes. Stabilizing processes allow ecosystems to adequately respond to destabilizing changes, or perturbations, in ecological conditions, or to recover from degradation induced by them. Yet, if destabilizing processes become strong enough or fast enough to cross a critical threshold within that ecosystem, often described as an ecological 'tipping point', then an ecosystem collapse (sometimes also termed ecological collapse) occurs.

Ecosystem collapse does not mean total disappearance of life from the area, but it does result in the loss of the original ecosystem's defining characteristics, typically including the ecosystem services it may have provided. Collapse of an ecosystem is effectively irreversible more often than not, and even if the reversal is possible, it tends to be slow and difficult. Ecosystems with low resilience may collapse even during a comparatively stable time, which then typically leads to their replacement with a more resilient system in the biosphere. However, even resilient ecosystems may disappear during the times of rapid environmental change, and study of the fossil record was able to identify how certain ecosystems went through a collapse, such as with the Carboniferous rainforest collapse or the collapse of Lake Baikal and Lake Hovsgol ecosystems during the Last Glacial Maximum.

Turkoman, also known as Turcoman (English: /ˈtɜːrkəmən/), was a term for the people of Oghuz Turkic origin, widely used during the Middle Ages. Oghuz Turks were a western Turkic people that, in the 8th century A.D, formed a tribal confederation in an area between the Aral and Caspian seas in Central Asia, and spoke the Oghuz branch of the Turkic language family. Today, much of the populations of Turkey, Azerbaijan and Turkmenistan are direct descendants of Oghuz Turks once called Turkomans.

Turkmen, originally an exonym, dates from the High Middle Ages, along with the ancient and familiar name "Turk" (türk), and tribal names such as "Bayat", "Bayandur", "Afshar", and "Kayi". By the 10th century, Islamic sources were referring to Oghuz Turks as Muslim Turkmens, as opposed to Tengrist or Buddhist Turks. It entered into the usage of the Western world through the Byzantines in the 12th century, since by that time Oghuz Turks were overwhelmingly Muslim. Later, the term "Oghuz" was gradually supplanted by "Turkmen" among Oghuz Turks themselves, thus turning an exonym into an endonym, a process which was completed by the beginning of the 13th century.

The Karakalpaks, or Qaraqalpaqs (/ˈkærəkɑːlpɑːks, -pæks/ ; Karakalpak: Qaraqalpaqlar, Қарақалпақлар, قاراقلپقلر), are a Turkic ethnic group native to Karakalpakstan in Northwestern Uzbekistan. During the 18th century, they settled in the lower reaches of the Amu Darya and in the (former) delta of Amu Darya on the southern shore of the Aral Sea. The name Karakalpak comes from two words: qara meaning 'black' and qalpaq meaning 'hat'. The Karakalpaks number nearly 871,970 worldwide, out of which about 726,000 live in the Karakalpakstan region of Uzbekistan.

Khwarazm or Chorasmia is a large oasis region on the Amu Darya river delta in western Central Asia, bordered on the north by the (former) Aral Sea, on the east by the Kyzylkum Desert, on the south by the Karakum Desert, and on the west by the Ustyurt Plateau. It was the center of the Iranian Khwarezmian civilization until the 9th century, when Turkic tribes moved into and ruled the lands. A series of kingdoms such as the Afrighid dynasty and the Anushtegin dynasty, whose capitals were (among others) Kath, Gurganj (now Konye-Urgench) and—from the 16th century on—Khiva. Today Khwarazm belongs partly to Uzbekistan and partly to Turkmenistan.

The Syr Darya, historically known as the Jaxartes (/dʒækˈsɑːrtiːz/ jak-SAR-teez; Ancient Greek: Ἰαξάρτης), is a river in Central Asia. The name, which is Persian, literally means Syr Sea or Syr River. It originates in the Tian Shan mountains in Kyrgyzstan and eastern Uzbekistan, and flows for 2,256.25 kilometres (1,401.97 mi) west and north-west through Uzbekistan, Sughd province of Tajikistan, and southern Kazakhstan to the northern remnants of the Aral Sea. It is the northern and eastern of the two main rivers in the endorheic basin of the Aral Sea, the other being the Amu Darya.

During the Soviet era, extensive irrigation projects were constructed around both rivers, diverting their water into farmland and causing, during the post-Soviet era, the virtual disappearance of the Aral Sea, once the world's fourth-largest lake. The point at which the river flows from Tajikistan into Uzbekistan is, at 300 m (980 ft) above sea level, the lowest elevation in Tajikistan.

Khwārezmian (Khwarezmian: زڨاک ای خوارزم zəβāg ī xwārazm, *xwārazmānk; also transliterated Khwarazmian, Chorasmian, Khorezmian) is an extinct Eastern Iranian language closely related to Sogdian. The language was spoken in the area of Khwarezm (Chorasmia), centered in the lower Amu Darya south of the Aral Sea (the northern part of the modern Republic of Uzbekistan and the adjacent areas of Kazakhstan and Turkmenistan).

Knowledge of Khwarezmian is limited to its Middle Iranian stage and, as with Sogdian, little is known of its ancient form. Based on the writings of Khwarezmian scholars Al-Biruni and Zamakhshari, the language was in use at least until the 13th century, when it was gradually replaced by Persian for the most part, as well as several dialects of Turkic.

Environmental resource management or environmental management is the management of the interaction and impact of human societies on the environment. It is not, as the phrase might suggest, the management of the environment itself. Environmental resources management aims to ensure that ecosystem services are protected and maintained for future human generations, and also maintain ecosystem integrity through considering ethical, economic, and scientific (ecological) variables. Environmental resource management tries to identify factors between meeting needs and protecting resources. It is thus linked to environmental protection, resource management, sustainability, integrated landscape management, natural resource management, fisheries management, forest management, wildlife management, environmental management systems, and others.

The Uralian orogeny refers to the long series of linear deformation and mountain building events that raised the Ural Mountains, starting in the Late Carboniferous and Permian periods of the Palaeozoic Era, c. 323–299 and 299–251 million years ago (Mya) respectively, and ending with the last series of continental collisions in Triassic to early Jurassic times.

The region affected by the orogeny, the Uralian orogenic belt or the Uralides, is usually thought of as the boundary between Europe and Asia. It extends from the Aral Sea to Novaya Zemlya, and it includes in addition to the Ural Mountains, the Pay-Khoy Ridge of northwest Russia and the Mugodzhar Hills of northwest Kazakhstan. Its total length is about 3,500 kilometres (2,200 mi), of which the Ural Mountains are about 2,500 km (1,600 mi).

The Amu Darya, historically known as the Oxus, is a major river in Central Asia which flows through Tajikistan, Turkmenistan, Uzbekistan, and Afghanistan. Rising in the Pamir Mountains, north of the Hindu Kush, the Amu Darya is formed by the confluence of the Vakhsh and Panj rivers, in the Tigrovaya Balka Nature Reserve on the border between Afghanistan and Tajikistan, and flows from there north-westwards into the southern remnants of the Aral Sea. However, today the Amu Darya does not reach the Aral Sea, and its mouth is in a dried-up area, of what was once the Aral Sea. In its upper course, the river forms part of Afghanistan's northern border with Tajikistan, Uzbekistan, and Turkmenistan. In ancient history, the river was regarded as the boundary of Greater Iran with Turan, which roughly corresponded to present-day Central Asia. The Amu Darya has a flow of about 70 cubic kilometres per year on average.