Dipterocarpaceae is a
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
of 16 genera and about 695 known species
of mainly
tropical
The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in
the Southern Hemisphere at S. The tropics are also referred to ...
lowland
rainforest tree
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...
s. The family name, from the type genus ''
Dipterocarpus
'' D. retusus'' in Köhler
''Dipterocarpus'' is a genus of flowering plants and the type genus of family Dipterocarpaceae.
''Dipterocarpus'' is the third-largest and most diverse genus among the Dipterocarpaceae. The species are well known for ...
'', is derived from
Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
(''di'' = two, ''pteron'' = wing and ''karpos'' = fruit) and refers to the two-winged fruit. The largest genera are ''
Shorea
Fruit of a ''Shorea'' species
''Shorea'' is a genus of about 196 species of mainly rainforest trees in the family Dipterocarpaceae. The genus is named after Sir John Shore, the governor-general of the British East India Company, 1793–1798. T ...
'' (196 species), ''
Hopea
''Hopea'' is a genus of plants in the family Dipterocarpaceae. The genus was named after John Hope, 1725–1786, the first Regius Keeper of the Royal Botanic Garden, Edinburgh. It contains some 113 species, distributed from Sri Lanka and south ...
'' (104 species), ''
Dipterocarpus
'' D. retusus'' in Köhler
''Dipterocarpus'' is a genus of flowering plants and the type genus of family Dipterocarpaceae.
''Dipterocarpus'' is the third-largest and most diverse genus among the Dipterocarpaceae. The species are well known for ...
'' (70 species), and ''
Vatica
''Vatica'' is a genus of plants in the family Dipterocarpaceae.
Species
, ''Plants of the World Online'' accepted the following species:
* '' Vatica abdulrahmaniana''
* '' Vatica acrocarpa''
* '' Vatica adenanii''
* '' Vatica affinis''
* ...
'' (65 species).
[Ashton, P.S. Dipterocarpaceae. In ''Tree Flora of Sabah and Sarawak,'' Volume 5, 2004. Soepadmo, E., Saw, L. G. and Chung, R. C. K. eds. Government of Malaysia, Kuala Lumpur, Malaysia. ] Many are large forest-emergent species, typically reaching heights of 40–70 m, some even over 80 m (in the
genera ''
Dryobalanops
''Dryobalanops'' is a genus of flowering plants and the genus of family Dipterocarpaceae. The name ''Dryobalanops'' is derived from Greek (''dryas'' = a nymph associated with oaks and ''balanops'' = acorn) and describes the acorn-like nut. The ge ...
'',
[ '']Hopea
''Hopea'' is a genus of plants in the family Dipterocarpaceae. The genus was named after John Hope, 1725–1786, the first Regius Keeper of the Royal Botanic Garden, Edinburgh. It contains some 113 species, distributed from Sri Lanka and south ...
'' and ''Shorea
Fruit of a ''Shorea'' species
''Shorea'' is a genus of about 196 species of mainly rainforest trees in the family Dipterocarpaceae. The genus is named after Sir John Shore, the governor-general of the British East India Company, 1793–1798. T ...
''),[ with the tallest known living specimen ('']Shorea faguetiana
''Shorea faguetiana'' is a species of plant in the family Dipterocarpaceae. Along with other species in the genus ''Shorea'', it is also called '' Yellow Meranti.'' It is native to Borneo, the Malay Peninsula, and Thailand. It is the tallest fl ...
'') 93.0 m tall.[ The species of this family are of major importance in the ]timber trade There are multiple market layers for wood products. Each country has its own domestic market that may be connected to a regional or global market. Timber supply to domestic markets in many tropical forest countries is largely provided by informal lo ...
. Their distribution is pantropical
A pantropical ("all tropics") distribution is one which covers tropical regions of both hemispheres. Examples of species include caecilians, modern sirenians and the plant genera ''Acacia'' and ''Bacopa''.
''Neotropical'' is a zoogeographic term ...
, from northern South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...
to Africa
Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...
, the Seychelles
Seychelles (, ; ), officially the Republic of Seychelles (french: link=no, République des Seychelles; Creole: ''La Repiblik Sesel''), is an archipelagic state consisting of 115 islands in the Indian Ocean. Its capital and largest city, ...
, India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
, Indochina
Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west an ...
, Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...
and Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
. The greatest diversity of Dipterocarpaceae occurs in Borneo
Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and ea ...
.[Ashton, P.S. Dipterocarpaceae. ''Flora Malesiana'', 1982 Series I, 92: 237-552] Some species are now endangered
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...
as a result of overcutting, extensive illegal logging
Illegal logging is the harvest, transportation, purchase or sale of timber in violation of laws. The harvesting procedure itself may be illegal, including using corruption, corrupt means to gain access to forests; extraction without permission, o ...
, and habitat conversion. They provide valuable woods, aromatic essential oils, balsam, and resins
In polymer chemistry and materials science, resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds. This article focuses on natu ...
, and are a source for plywood.
Classification
The dipterocarp family is generally divided into two subfamilies:
* Dipterocarpoideae: the largest of the subfamilies, it contains 13 genera and about 475 species. Distribution includes the Seychelles
Seychelles (, ; ), officially the Republic of Seychelles (french: link=no, République des Seychelles; Creole: ''La Repiblik Sesel''), is an archipelagic state consisting of 115 islands in the Indian Ocean. Its capital and largest city, ...
, Sri Lanka, India, Southeast Asia
Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical south-eastern region of Asia, consisting of the regions that are situated south of mainlan ...
to New Guinea
New Guinea (; Hiri Motu: ''Niu Gini''; id, Papua, or , historically ) is the world's second-largest island with an area of . Located in Oceania in the southwestern Pacific Ocean, the island is separated from Australia by the wide Torr ...
, and a large distribution in Borneo, where they form the dominant species in the lowland forests. North Borneo (Brunei
Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely surrounded by t ...
, Sabah
Sabah () is a state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indonesia to the south. The Federal Territory o ...
, and Sarawak
Sarawak (; ) is a state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the Malaysian state of Sabah to the northeast, ...
) is the richest area in the world for dipterocarp species.[ The Dipterocarpoideae can be divided morphologically into two groups,][ and the tribe names Shoreae and Dipterocarpeae are sometimes used, but genetic evidence so far does not support this division:]
** Valvate - Dipterocarpeae group (''Anisoptera
A dragonfly is a flying insect belonging to the infraorder Anisoptera below the order Odonata. About 3,000 extant species of true dragonfly are known. Most are tropical, with fewer species in temperate regions. Loss of wetland habitat threa ...
'', ''Cotylelobium
''Cotylelobium'' is a genus of plants in the family Dipterocarpaceae. The name ''Cotylelobium'' is derived from Greek (''kotyle'' = a small cup and ''lobos'' = a pod) and describes the receptacle. It contains five species distributed in Sri Lanka ...
'', ''Dipterocarpus
'' D. retusus'' in Köhler
''Dipterocarpus'' is a genus of flowering plants and the type genus of family Dipterocarpaceae.
''Dipterocarpus'' is the third-largest and most diverse genus among the Dipterocarpaceae. The species are well known for ...
'', ''Stemonoporus
''Stemonoporus'' is a genus of plants in the family Dipterocarpaceae.
Species
It contains the following species:
* '' Stemonoporus acuminatus'' - (Thwaites) P.S.Ashton
* '' Stemonoporus affinis'' - Thwaites
* '' Stemonoporus angustisepalus'' - ...
'', '' Upuna'', ''Vateria
''Vateria'' is a genus of plant
Plants are predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all c ...
'', ''Vateriopsis
''Vateriopsis seychellarum'' is a species of plant in the family Dipterocarpaceae, and is the only species in the genus ''Vateriopsis''. It is endemic to Seychelles. It has been labeled as a critically endangered species due to climate change
...
'', ''Vatica
''Vatica'' is a genus of plants in the family Dipterocarpaceae.
Species
, ''Plants of the World Online'' accepted the following species:
* '' Vatica abdulrahmaniana''
* '' Vatica acrocarpa''
* '' Vatica adenanii''
* '' Vatica affinis''
* ...
''). The genera of this group have valvate sepals in fruit, solitary vessels, scattered resin canals, and basic chromosome number x = 11.
** Imbricate
Aestivation or estivation is the positional arrangement of the parts of a flower within a flower bud before it has opened. Aestivation is also sometimes referred to as praefoliation or prefoliation, but these terms may also mean vernation: the ar ...
- Shoreae
Dipterocarpaceae is a family of 16 genera and about 695 known species of mainly tropical lowland rainforest trees. The family name, from the type genus ''Dipterocarpus'', is derived from Greek (''di'' = two, ''pteron'' = wing and ''karpos'' = fru ...
group ('' Balanocarpus'', ''Hopea
''Hopea'' is a genus of plants in the family Dipterocarpaceae. The genus was named after John Hope, 1725–1786, the first Regius Keeper of the Royal Botanic Garden, Edinburgh. It contains some 113 species, distributed from Sri Lanka and south ...
'', ''Parashorea
''Parashorea'' is a genus of plant in family Dipterocarpaceae. The name ''Parashorea'' is derived from Greek (''para'' = similar to) and refers to the genus similarity to ''Shorea''.
It contains about 15 species distributed from South Myanmar, T ...
'', ''Shorea
Fruit of a ''Shorea'' species
''Shorea'' is a genus of about 196 species of mainly rainforest trees in the family Dipterocarpaceae. The genus is named after Sir John Shore, the governor-general of the British East India Company, 1793–1798. T ...
''). The genera of this group have imbricate sepals in fruit, grouped vessels, resin canals in tangential bands, and basic chromosome number x = 7. A recent molecular study suggests that the genus ''Hopea'' forms a clade with ''Shorea'' sections '' Anthoshorea'' and '' Doona'', and should be merged into ''Shorea''.
* Monotoideae
Monotoideae is a subfamily of the plant family Dipterocarpaceae, with 3 genera and 30 species. It is native to the rainforest habitat of Africa and Madagascar, as well as South America. The geographical discontinuity can be traced back to a date ...
: three genera, 30 species. ''Marquesia
''Marquesia'' is a genus of plant in family Dipterocarpaceae. It is native to Africa and can be found in Angola, Equatorial Guinea, Gabon, Tanzania, Zambia, Zaïre and Zimbabwe.
It contains the following species:
* '' Marquesia acuminata''
* '' ...
'' is native to Africa
Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...
. ''Monotes
''Monotes'' is a genus of flowering plants in the family Dipterocarpaceae. Its name, meaning "unity" or "uniqueness" was chosen because it was the only genus of dipterocarp then known to occur in Africa. The Zambezian region is the centre of dive ...
'' has 26 species, distributed across Africa and Madagascar. ''Pseudomonotes
''Pseudomonotes'' is a monotypic genus of trees in the family Dipterocarpaceae. It contains a single species ''Pseudomonotes tropenbosii'', which is endemic to the Amazon rainforest of Colombia
Colombia (, ; ), officially the Republic of ...
'' is native to the Colombian Amazon.
A recent genetic study found that the Asian dipterocarps share a common ancestor with the Sarcolaenaceae, a tree family endemic to Madagascar. This suggests that ancestor of the dipterocarps originated in the southern supercontinent of Gondwana, and that the common ancestor of the Asian dipterocarps and the Sarcolaenaceae was found in the India-Madagascar-Seychelles land mass millions of years ago, and were carried northward by India, which later collided with Asia and allowed the dipterocarps to spread across Southeast Asia and Malaysia. The first dipterocarp pollen has been found in Myanmar (which at that time was part of the Indian plate
The Indian Plate (or India Plate) is a minor tectonic plate straddling the equator in the Eastern Hemisphere. Originally a part of the ancient continent of Gondwana, the Indian Plate broke away from the other fragments of Gondwana , began ...
) and it dates from the upper Oligocene.[Morley, R.J. 2000. Origin and Evolution of Tropical Rain Forests. ]Wiley-Blackwell
Wiley-Blackwell is an international scientific, technical, medical, and scholarly publishing business of John Wiley & Sons. It was formed by the merger of John Wiley & Sons Global Scientific, Technical, and Medical business with Blackwell Publish ...
, NY. The sample appears to slowly increase in terms of diversity and abundance across the region into the mid-Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...
.[ Chemical traces of dipterocarp resins have been found dating back to the ]Eocene
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', " ...
of India. The oldest fossil of the family are from the latest Cretaceous (Maastrichtian
The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval ...
) aged Intertrappean Beds
The Intertrappean Beds are a Late Cretaceous geologic formation in India. The beds are found as interbeds between Deccan Traps layers. Indeterminate theropod and pterosaur remains have been recovered from the formation, as well as dinosaur eggs ...
of India, assignable to the extant genus ''Dipterocarpus
'' D. retusus'' in Köhler
''Dipterocarpus'' is a genus of flowering plants and the type genus of family Dipterocarpaceae.
''Dipterocarpus'' is the third-largest and most diverse genus among the Dipterocarpaceae. The species are well known for ...
''.
Subfamily Pakaraimoideae formerly placed here and native to the Guaianan highlands of South America, is now found to be more closely related the Cistaceae
The Cistaceae are a small family of plants (rock-rose or rock rose family) known for their beautiful shrubs, which are profusely covered by flowers at the time of blossom. This family consists of about 170(-200) species in nine genera that are ...
and is placed there in the APG IV (2016).
Fossilized arthropods
Some 52-million-year-old amber
Amber is fossilized tree resin that has been appreciated for its color and natural beauty since Neolithic times. Much valued from antiquity to the present as a gemstone, amber is made into a variety of decorative objects."Amber" (2004). In ...
found in the Gujarat
Gujarat (, ) is a state along the western coast of India. Its coastline of about is the longest in the country, most of which lies on the Kathiawar peninsula. Gujarat is the fifth-largest Indian state by area, covering some ; and the ninth ...
province, India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
, containing a large amount of fossilized arthropod
Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and cuticle made of chiti ...
s, was identified as sap from the family Dipterocarpaceae.
Ecology
Dipterocarpaceae species can be either evergreen or deciduous. Species occurring in Thailand grow from sea level to about 1300 m elevation. Environments in which the species of the family occur in Thailand include lowland dipterocarp forest 0–350 m, riparian fringe, limestone hills, and coastal hills.
Conservation and Climate Change
As the dominant tree in Southeast Asia, the Dipterocarp family has seen extensive study relating to its conservation status. They are a keystone species of the native forests of this region, and are essential to their function and structure.
One study by Pang et al. examined the impacts of climate change
In common usage, climate change describes global warming—the ongoing increase in global average temperature—and its effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes to ...
and land cover on the distribution of this important tree family in the Philippines. They used species distribution models (SDMs) for 19 species that were projected onto both current and future climate scenarios, with current land cover incorporated as well. They found that the current land cover alone reduced the species distributions by 67%, and 37% in protected areas. On the other hand, climate change reduced species distributions by 16-27% in both protected and unprotected areas. There was also an upward shift in elevation of species distribution as a result of climate change, as habitats changed. They concluded that there was a need to improve protected area planning as refuges for critical species, with SDMs proving to be a useful tool for providing projections that can then be incorporated into this planning process.
Another paper by Shishir et al. also investigated the potential effects of climate change on a threatened Dipterocarp tree in Purbachal, Bangladesh. Using a model that incorporated nine different environmental variables such as climate, geography, and soil conditions, they looked at two climate scenarios. They found that precipitation and soil nitrogen were the largest determinants of distribution, and that suitable habitat for this species will decline by 21-28% relative to the present land area as a result of climate change.
See also
* Dipterocarp timber classification
References
External links
*
Dipterocarpaceae Data Base
{{Authority control
Malvales families
Pantropical flora