1.
Tropical and subtropical moist broadleaf forests
–
The biome includes several types of forests, Lowland equatorial evergreen rain forests, commonly known as tropical rainforests, are forests which receive high rainfall throughout the year. These forests occur in a belt around the equator, with the largest areas in the Amazon basin of South America, the Congo basin of central Africa, some trees in these forests drop some or all of their leaves during the winter dry season. These forests are found in parts of South America, in Central America and around the Caribbean, in coastal West Africa, parts of the Indian subcontinent, montane rain forests, are found in cooler-climate mountainous areas. Those with elevations high enough to regularly encounter low-level cloud cover are known as cloud forests, flooded forests, including freshwater swamp forests and peat swamp forests. In contrast to TSMF, tropical forest regions with lower levels of rainfall are home to tropical dry broadleaf forests, temperate rain forests also occur in certain humid temperate coastal regions. Rainforests now cover less than 6% of Earths land surface, scientists estimate that more than half of all the worlds plant and animal species live in tropical rain forests
2.
Ecoregion
–
An ecoregion is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than an ecozone. All three of these are less or greater than an ecosystem. Ecoregions cover relatively large areas of land or water, and contain characteristic, the biodiversity of flora, fauna and ecosystems that characterise an ecoregion tends to be distinct from that of other ecoregions. 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, secondly, ecoregion boundaries rarely form abrupt edges, rather, ecotones and mosaic habitats bound them. Thirdly, most ecoregions contain habitats that differ from their assigned biome, biogeographic provinces may originate due to various barriers. Some physical, some climatic and some ocean chemical related, the history of the term is somewhat vague as it was used in many contexts, forest classifications, biome classifications, biogeographic classifications, etc. The concept of ecoregion of Bailey gives more importance to ecological criteria, while the WWF concept gives more importance to biogeography, there is significant, but not absolute, spatial correlation among these characteristics, making the delineation of ecoregions an imperfect science. Such transition zones are called ecotones, Ecoregions can be categorized using an algorithmic approach or a holistic, “weight-of-evidence” approach where the importance of various factors may vary. An example of the approach is Robert Bailey’s work for the U. S. The intended purpose of ecoregion delineation may affect the method used, according to WWF, the boundaries of an ecoregion approximate the original extent of the natural communities prior to any major recent disruptions or changes. WWF has identified 867 terrestrial ecoregions, and approximately 450 freshwater ecoregions across the Earth, the use of the term ecoregion is an outgrowth of a surge of interest in ecosystems and their functioning. In particular, there is awareness of issues relating to spatial scale in the study and it is widely recognized that interlinked ecosystems combine to form a whole that is greater than the sum of its parts. The Global 200 is the list of ecoregions identified by WWF as priorities for conservation, Terrestrial ecoregions are land ecoregions, as distinct from freshwater and marine ecoregions. In this context, terrestrial is used to mean of land, WWF ecologists currently divide the land surface of the Earth into 8 major ecozones containing 867 smaller terrestrial ecoregions. The WWF effort is a synthesis of previous efforts to define. Many consider this classification to be decisive, and some propose these as stable borders for bioregional democracy initiatives. The eight terrestrial ecozones follow the major floral and faunal boundaries, identified by botanists and zoologists, ecozone boundaries generally follow continental boundaries, or major barriers to plant and animal distribution, like the Himalayas and the Sahara
3.
India
–
India, officially the Republic of India, is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and it is bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast. It shares land borders with Pakistan to the west, China, Nepal, and Bhutan to the northeast, in the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives. Indias Andaman and Nicobar Islands share a border with Thailand. The Indian subcontinent was home to the urban Indus Valley Civilisation of the 3rd millennium BCE, in the following millennium, the oldest scriptures associated with Hinduism began to be composed. Social stratification, based on caste, emerged in the first millennium BCE, early political consolidations took place under the Maurya and Gupta empires, the later peninsular Middle Kingdoms influenced cultures as far as southeast Asia. In the medieval era, Judaism, Zoroastrianism, Christianity, and Islam arrived, much of the north fell to the Delhi sultanate, the south was united under the Vijayanagara Empire. The economy expanded in the 17th century in the Mughal empire, in the mid-18th century, the subcontinent came under British East India Company rule, and in the mid-19th under British crown rule. A nationalist movement emerged in the late 19th century, which later, under Mahatma Gandhi, was noted for nonviolent resistance, in 2015, the Indian economy was the worlds seventh largest by nominal GDP and third largest by purchasing power parity. Following market-based economic reforms in 1991, India became one of the major economies and is considered a newly industrialised country. However, it continues to face the challenges of poverty, corruption, malnutrition, a nuclear weapons state and regional power, it has the third largest standing army in the world and ranks sixth in military expenditure among nations. India is a constitutional republic governed under a parliamentary system. It is a pluralistic, multilingual and multi-ethnic society and is home to a diversity of wildlife in a variety of protected habitats. The name India is derived from Indus, which originates from the Old Persian word Hindu, the latter term stems from the Sanskrit word Sindhu, which was the historical local appellation for the Indus River. The ancient Greeks referred to the Indians as Indoi, which translates as The people of the Indus, the geographical term Bharat, which is recognised by the Constitution of India as an official name for the country, is used by many Indian languages in its variations. Scholars believe it to be named after the Vedic tribe of Bharatas in the second millennium B. C. E and it is also traditionally associated with the rule of the legendary emperor Bharata. Gaṇarājya is the Sanskrit/Hindi term for republic dating back to the ancient times, hindustan is a Persian name for India dating back to the 3rd century B. C. E. It was introduced into India by the Mughals and widely used since then and its meaning varied, referring to a region that encompassed northern India and Pakistan or India in its entirety
4.
Khasi and Jaintia Hills
–
The Khasi and Jaintia Hills are a mountainous region that was mainly part of Assam and meghalaya. The Jaintia Hills are located further to the east from the Khasi Hills and his winter capital is now in Bangladesh, with his summer residence shifted from Sutnga to Nartiang, also a palace in the commercial center Borghat. The Jaintia Hills used to be a part of the Jaintia Hills District, the district has been bifurcated into two separate districts, namely, East Jaintia Hills and West Jaintia Hills on 31 July 2012. The Khasi Hills are located east of the Garo Hills, map of the Khasi states The Khasis by R. R. T. Gurdon, part 2
5.
Meghalaya
–
Meghalaya is a state in northeast India. The name means the abode of clouds in Sanskrit, the population of Meghalaya as of 2016 is estimated to be 3,211,474. Meghalaya covers an area of approximately 22,430 square kilometers, the state is bounded to the south by the Bangladeshi divisions of Mymensingh and Sylhet, to the west by the Bangladeshi division of Rangpur, and to the north and east by Indias State of Assam. The capital of Meghalaya is Shillong, during the British occupation of India, the British imperialist authorities nicknamed it the Scotland of the East. Meghalaya was previously part of Assam, but on 21 January 1972, English is the official language of Meghalaya. The other principal languages spoken include Khasi, Pnar, Hajong, Rabha, Garo, the state is the wettest region of India, recording an average of 12,000 mm of rains a year. About 70% of the state is forested, the Meghalaya subtropical forests ecoregion encompasses the state, its mountain forests are distinct from the lowland tropical forests to the north and south. The forests are notable for their biodiversity of mammals, birds, Meghalaya has predominantly an agrarian economy with a significant commercial forestry industry. The important crops are potatoes, rice, maize, pineapples, bananas, papayas, spices, the service sector is made up of real estate and insurance companies. Meghalayas gross state product for 2012 was estimated at ₹16,173 crore in current prices. The state is rich in minerals, but it has no significant industries. The state has about 1,170 km of national highways and it is also a major logistical center for trade with Bangladesh. Ancient Meghalaya, along with neighboring Indian states, have been of archeological interest, people have lived here since neolithic era. Neolithic sites discovered so far are located in areas of high elevation such as in Khasi Hills, Garo Hills, here neolithic style jhum or shifting cultivation is practiced even today. The highland plateaus fed by abundant rains provided safety from floods, the importance of Meghalaya is its possible role in human history through domestication of rice. The limited archeology done in the hills of Meghalaya suggest human settlement since ancient times, modern history Meghalaya was formed by carving out two districts from the state of Assam, the United Khasi Hills and Jaintia Hills, and the Garo Hills on 21 January 1972. Before attaining full statehood, Meghalaya was given semi-autonomous status in 1970, the Khasi, Garo, and Jaintia tribes had their own kingdoms until they came under British administration in the 19th century. Later, the British incorporated Meghalaya into Assam in 1835, the region enjoyed semi-independent status by virtue of a treaty relationship with the British Crown
6.
Assam
–
Assam (English pronunciation, /əˈsæm/ listen is a state in northeastern India. Located south of the eastern Himalayas, Assam comprises the Brahmaputra Valley, Assam, along with Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, and Meghalaya, is one of the Seven Sister States. Geographically, Assam and these states are connected to the rest of India via a 22 kilometres strip of land in West Bengal called the Siliguri Corridor or Chickens Neck. Assam shares a border with Bhutan and Bangladesh, and its culture, people. Assam is known for Assam tea and Assam silk, the first oil well in Asia was drilled here. The state has conserved the one-horned Indian rhinoceros from near extinction, along with the water buffalo, pygmy hog, tiger. It provides one of the last wild habitats for the Asian elephant, the Assamese economy is aided by wildlife tourism, centred around Kaziranga National Park and Manas National Park which are World Heritage Sites. Sal tree forests are found in the state which, as a result of abundant rainfall, Assam receives more rainfall compared to most parts of India. This rain feeds the Brahmaputra River, whose tributaries and oxbow lakes provide the region with a hydro-geomorphic and aesthetic environment, the precise etymology of Assam came from Ahom Dynasty. In the classical period and up to the 12th century the region east of the Karatoya river, largely congruent to present-day Assam, was called Kamarupa, in medieval times the Mughals used Asham and Kamrup, and during British colonialism, the English used Assam. Though many authors have associated the name with the 13th century Shan invaders the precise origin of the name is not clear. It was suggested by some that the Sanskrit word Asama was the root, which has been rejected by Kakati, among possible origins are Tai and Bodo. Assam and adjoining regions have evidences of settlements from all the periods of the Stone ages. The hills at the height of 1, 500–2,000 feet were popular habitats probably due to availability of exposed dolerite basalt, useful for tool-making. According to a text, Kalika Purana, the earliest ruler of Assam was Mahiranga Danav of the Danava dynasty. The last of these rulers, also Naraka, was slain by Krishna, narakas son Bhagadatta became the king, who fought for the Kauravas in the battle of Kurukshetra with an army of kiratas, chinas and dwellers of the eastern coast. Samudraguptas 4th century Allahabad pillar inscription mentions Kamarupa and Davaka as frontier kingdoms of the Gupta Empire, ruled by three dynasties Varmanas, Mlechchha dynasty and Kamarupa-Palas, from their capitals in present-day Guwahati, Tezpur and North Gauhati respectively. All three dynasties claimed their descent from Narakasura, an immigrant from Aryavarta, in the reign of the Varman king, Bhaskar Varman, the Chinese traveller Xuanzang visited the region and recorded his travels
7.
Biodiversity
–
Biodiversity, a contraction of biological diversity, generally refers to the variety and variability of life on Earth. One of the most widely used definitions defines it in terms of the variability within species and it is a measure of the variety of organisms present in different ecosystems. This can refer to genetic variation, ecosystem variation, or species variation within an area, biome, terrestrial biodiversity tends to be greater near the equator, which seems to be the result of the warm climate and high primary productivity. Biodiversity is not distributed evenly on Earth, and is richest in the tropics and these tropical forest ecosystems cover less than 10 per cent of earths surface, and contain about 90 percent of the worlds species. Marine biodiversity tends to be highest along coasts in the Western Pacific, there are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots, and has been increasing through time, the number and variety of plants, animals and other organisms that exist is known as biodiversity. It is a component of nature and it ensures the survival of human species by providing food, fuel, shelter, medicines. The richness of biodiversity depends on the conditions and area of the region. All species of plants taken together are known as flora and about 300,000 species of plants are known to date, all species of animals taken together are known as fauna which includes birds, mammals, fish, reptiles, insects, crustaceans, molluscs, etc. Rapid environmental changes typically cause mass extinctions, more than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earths current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described. More recently, in May 2016, scientists reported that 1 trillion species are estimated to be on Earth currently with only one-thousandth of one percent described, the total amount of related DNA base pairs on Earth is estimated at 5.0 x 1037 and weighs 50 billion tonnes. In comparison, the mass of the biosphere has been estimated to be as much as 4 TtC. In July 2016, scientists reported identifying a set of 355 genes from the Last Universal Common Ancestor of all living on Earth. The age of the Earth is about 4.54 billion years old, there are microbial mat fossils found in 3.48 billion-year-old sandstone discovered in Western Australia. Other early physical evidence of a substance is graphite in 3.7 billion-year-old meta-sedimentary rocks discovered in Western Greenland. More recently, in 2015, remains of life were found in 4.1 billion-year-old rocks in Western Australia. According to one of the researchers, If life arose relatively quickly on Earth, then it could be common in the universe
