The Pacific palaeogeography of Rhizophora mangle L. (Rhizophoraceae)

Ellison, JC

doi:10.1111/j.1095-8339.1991.tb00208.x

Cited by 24 publications

(22 citation statements)

References 28 publications

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“…Avicennia and Rhizophora are som e of the dominant plants s pec ies of mangrove communities in the Niger Delta genera with several closely related species, this is similar to the report of Ellison (1991) in the study of pacific paleogeography of Rhizophora mangle L. Moreso, plants develop adaptive features to survive the ecosystem conditions. Nypa fruticans is an invasive species (Plate 3) that has posed significant threat to the mangrove ecosystem.…”

Section: Plate 2 Mangrove Vegetation Dominated Rhizophora Racemosa supporting

confidence: 84%

Floral diversity of the littoral vegetation of Southeastern Nigeria

Olowokudejo¹,

Oyebanji²

2016

Int. J. Biodivers. Conserv.

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An investigation of the floral diversity of the littoral vegetation of Akwa-Ibom State coastline of South eastern Nigeria was carried out using quadrat and transects techniques. The results revealed three (3) vegetation types viz: coastal/shoreline, mangrove and secondary forest vegetation. Although, the most encountered ecosystem was the mangrove yet, coastal vegetation had the highest flora diversity of 100 (47%) as compared to mangrove and secondary forest with 87 (41%) and 27 (12%) species, respectively. A total of 147 taxa belonging to 134 genera and 58 families were recorded from the study area. The dominant family was Fabaceae with 17 species (29.3%), while the dominant genus was Ipomoea with 5 species (3.73%). Of these taxa, 59 occurred in more than one vegetation type while 11 were present in all the three (3) vegetation types. Phanerophytes are the dominant life form covering 36% (53 species) of the encountered species. Similarly, diversity index revealed the highest diversity of species in the coastal ecosystem with Shannon-wiener's, Simpson's and Margalef values of 0.99, 4.61 and 21.67, respectively. Correlation matrix and Jaccard similarity coefficient value (0.35) was high between the coastal and mangrove pairs; however, it depicts a minimal significant difference in the species composition within the three ecosystems at 0.05% probability level. Also, PCA scatter plot established less variation between the coastal and mangrove vegetation. Also, 16 economic plants were encountered during the study with uses ranging from edible fruits, spices, vegetables, root crop, and medicine, to palm wine. Factors affecting species distribution a r e introduction of alien species (Nypa fruticans), canalization, dredging, over exploitation of mangrove and pollution. Conservation status of these taxa according to IUCN 2014-2 showed that no endangered species was encountered during the study. However, conservation of this littoral vegetation is highly imperative in other to stabilize the ecosystem dynamics, protect the biodiversity, prevent or reduce potential effects of ecological disasters such as flooding and erosion.

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Section: Plate 2 Mangrove Vegetation Dominated Rhizophora Racemosa supporting

confidence: 84%

Floral diversity of the littoral vegetation of Southeastern Nigeria

Olowokudejo¹,

Oyebanji²

2016

Int. J. Biodivers. Conserv.

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“…It is also possible that Rhizophora samoensis (Hochr.) Salvosa is the same species as R. mangle L. (Ellison, 1991) but this remains to be shown (Tomlinson, 1986;Duke, 1992). The diversity of genera in these families is relatively conservative, with eight genera in the AEP and twentythree in the IWP.…”

Section: Factors Influencing Species Richness Of Mangrovesmentioning

confidence: 99%

Factors Influencing Biodiversity and Distributional Gradients in Mangroves

Duke¹,

Ball²,

Ellison³

1998

Global Ecology and Biogeography Letters

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738

520

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Numerous factors affect the distribution of mangrove plants. Most mangrove species are typically dispersed by water‐buoyant propagules, allowing them to take advantage of estuarine, coastal and ocean currents both to replenish existing stands and to establish new ones. The direction they travel depends on sea currents and land barriers, but the dispersal distance depends on the time that propagules remain buoyant and viable. This is expected to differ for each species. Similarly, each species will also differ in establishment success and growth development rate, and each has tolerance limits and growth responses which are apparently unique. Such attributes are presumably responsible for the characteristic distributional ranges of each species, as each responds to the environmental, physical and biotic settings they might occupy. In practice, species are often ordered by the interplay of different factors along environmental gradients, and these may conveniently be considered at four geographic scales—global, regional, estuarine and intertidal. We believe these influencing factors act similarly around the world, and to demonstrate this point, we present examples of distributional gradients from the two global biogeographic regions, the Atlantic East Pacific and the Indo‐West Pacific.

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“…Relict mangrove sediments and fossil mangroves, particularly their pollen, have been used extensively in the interpretation of palaeogeography and stratigraphy (Churchill, 1973;Muller and Caratini, 1977;Bessedik, 1981;Mildenhall and Brown, 1987;Grindrod, 1988;Crowley et al, 1990;Ellison, 1991;Woodroffe and Grindrod, 1991). Mangrove pollen are particularly good markers because their presence in the sediments indicates a warm climate (with a mean monthly temperature above 16°C) and a nearby shoreline at the time the pollen was deposited.…”

Section: Can Mangroves Be Used As Biological Indicators Of Coastal Chmentioning

confidence: 99%

“…At the generic level, Avicennia and Rhizophora are the dominant plants of mangrove communities throughout the world, with each genus having several closely related species in both the east and the west (Macnae, 1968;Tomlinson, 1986;Ellison, 1991). At the species level, however, only a few species (such mangrove associates as Thespesia populnea (L.) Soland., the mangrove fern Acrostichum aureum L. and the swamp hibiscus, Hibiscus tiliaceus L.) occur in both hemispheres.…”

Section: Introductionmentioning

confidence: 99%