Rhizophora racemosa

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Rhizophora racemosa
Rhizophora trees.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Rhizophoraceae
Genus: Rhizophora
Species:
R. racemosa
Binomial name
Rhizophora racemosa

Rhizophora racemosa is a species of mangrove tree in the family Rhizophoraceae. It has a patchy distribution on the Pacific coast of Central and South America, occurs in places on the Atlantic coast of that continent, and has a more widespread range on the Atlantic coast of West Africa. [1]

Contents

Description

Members of the genus Rhizophora are very similar to each other in morphology. They grow up to 30 m (100 ft) tall often with aerial stilt roots, but in more marginal habitats are shorter, more branched and scrubby. The leaves grow in opposite pairs, each pair with two interlocking stipules. The leaves are simple and entire, with elliptical hairless blades and slightly down-rolled margins. The lower surfaces have numerous tiny corky warts which appear as black spots on dried leaves. [2]

At one time considered to be a subspecies of Rhizophora mangle , R. racemosa is now accepted as a full species, most easily distinguished by the fact that the stem of the axillary flowers branches up to six times, making a maximum cluster size of 128. However, the inflorescences more usually contain 32 to 64 flowers. Other distinguishing characteristics include thick, short rounded bracteoles and rounded flower buds. [2]

Ecology

Ripe propagule Rhizophora racemosa-propagule.jpg
Ripe propagule
Flowers Rhizophora racemosa flowers.jpg
Flowers
Rhizophora racemosa reproduction.jpg

In West Africa, estuaries, bays and lagoons are fringed by tidal mangrove forests, dominated by Rhizophora and Avicennia . When new mudflats are formed, seagrasses are the first plants that grow on the mud, with Rhizophora racemosa, a pioneering species, being the first mangrove to appear. [3] With time, the mud solidifies and more tree and plant species arrive. On the seaward side the trees are short but get steadily taller further inland. [3] The nipa palm (Nypa fruticans) has been introduced to Nigeria and Cameroon and has become invasive, to the detriment of the native mangrove species. [4]

Some insect pollination takes place, but R. racemosa is largely wind-pollinated. The fruit produce propagules which may fall into the water and be dispersed by wind and currents. [5]

Uses

In West Africa, Rhizophora racemosa is used for construction poles and firewood on a limited scale. The smoke has antimicrobial properties and is also used for smoking meat. In the Americas it is less likely to be harvested as it is more scarce and is not considered to be of much value. [1] Extracts from the bark of Rhizophora racemosa has been proven for its potential as an indicator in titration. [6]

Related Research Articles

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<i>Avicennia germinans</i> Species of tree

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<i>Laguncularia racemosa</i> Species of flowering plant

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<i>Rhizophora apiculata</i> Species of tree

Rhizophora apiculata belongs to the Plantae kingdom under the Rhizophoraceae family. Currently R. apiculata is distributed throughout Australia, Guam, India, Indonesia, Malaysia, Micronesia, New Caledonia, Papua New Guinea, the Philippines, Singapore, the Solomon Islands, Sri Lanka, Taiwan, the Maldives, Thailand, Vanuatu, and Vietnam. Rhizophora apiculata is called ‘bakhaw lalaki,’ in the Philippines, "Thakafathi ތަކަފަތި" in the Maldives, 'Đước' in Vietnam, Garjan in India, as well as other vernacular names.

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The Sunda Shelf mangroves ecoregion, in the mangrove biome, are on the coasts of the islands of Borneo and eastern Sumatra in Malaysia and Indonesia. They are home to the proboscis monkey.

<i>Nypa fruticans</i> Species of palm

Nypa fruticans, commonly known as the nipa palm or mangrove palm, is a species of palm native to the coastlines and estuarine habitats of the Indian and Pacific Oceans. It is the only palm considered adapted to the mangrove biome. This species is the only member of the genus Nypa and the subfamily Nypoideae, forming monotypic taxa.

<i>Rhizophora mucronata</i> Species of plant

Rhizophora mucronata is a species of mangrove found on coasts and river banks in East Africa and the Indo-Pacific region.

<i>Ceriops tagal</i> Species of tree

Ceriops tagal, commonly known as spurred mangrove or Indian mangrove, is a mangrove tree species in the family Rhizophoraceae. It is a protected tree in South Africa. The specific epithet tagal is a plant name from the Tagalog language.

<i>Lumnitzera racemosa</i> Species of tree

Lumnitzera racemosa, commonly known as the white-flowered black mangrove, is a species of mangrove in the family Combretaceae. It is found on the eastern coast of Africa and other places in the western Indo-Pacific region. It has one accepted variety from the noniminate species, Lumnitzera racemosa var. lutea (Gaudich.) Exell.

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Pará mangroves

The Pará mangroves (NT1427) is an ecoregion along the Atlantic coast of the state of Pará in Brazil. They constitute the western extension of the Maranhão mangroves ecoregion. The mangroves are relatively intact, although they are under some pressure from agriculture and logging.

Abatan River

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References

  1. 1 2 3 Ellison, A.; Farnsworth, E.; Moore, G. (2010). "Rhizophora racemosa". IUCN Red List of Threatened Species . 2010. Retrieved 7 March 2017.
  2. 1 2 Tomlinson, P.B.; Tomlinson, Philip Barry (1994). The Botany of Mangroves. Cambridge University Press. pp. 326–336. ISBN   978-0-521-46675-2.
  3. 1 2 Hughes, R.H. (1992). A Directory of African Wetlands. IUCN. p. 508. ISBN   978-2-88032-949-5.
  4. "Nypa fruticans (nipa palm)". Invasive species compendium. CABI. Retrieved 14 March 2017.
  5. Ngeve, Magdalene N.; Van der Stocken, Tom; Menemenlis, Dimitris; Koedam, Nico; Triest, Ludwig (2016). "Contrasting Effects of Historical Sea Level Rise and Contemporary Ocean Currents on Regional Gene Flow of Rhizophora racemosa in Eastern Atlantic Mangroves". PLOS ONE. 11 (3): e0150950. doi: 10.1371/journal.pone.0150950 . PMC   4786296 . PMID   26964094.
  6. Korfii, Uebari; Boisa, Ndokiari; Tubonimi, Ideriah (2021). "Application of red mangrove plant (Rhizophora racemosa) extracts as pH indicator". Asian Journal of Green Chemistry. 5 (1): 111–124. doi:10.22034/ajgc.2021.113192. ISSN   2588-5839.