Logo

Mangroves source details

NameAdams, J.B.; Colloty, B.M. & Bate, G.C. 2004. The distribution and state of mangroves along the coast of Transkei, Eastern Cape Province, South Africa. Wetlands Ecology and Management 12: 531–541.
SourceID132732
Type Publication
Full textAvailable for editors  PDF available
AbstractThe mangrove communities along the coastline of the former Transkei, now part of the Eastern Cape Province, have not been looked at in detail since Ward and Steinke’s survey in 1982. Mangroves previously occurred in 17 estuaries but were now found in only 14 of the 76 estuaries visited, with a complete loss of mangroves evident in the Mnyameni, Mzimvubu and Bulungula estuaries amounting to 7.5 ha. Total mangrove loss amounted to 17.6 ha which represents a 6.5% loss over 17 years or 1.04 ha per annum. Tree cover had increased by 16.15 ha in eight other estuaries. This increase could be attributed to the inaccessibility of mangrove stands or to protection afforded by provincial nature reserves and hotel resorts. No new mangrove stands were recorded, although Steinke (pers. comm.) has recently recorded mangroves along the north bank of the Kei River. There has been little change in mangrove species composition in the different estuaries over the past 17 years. Total mangrove loss amounted to 17.6 ha which represents a 6.5% loss over 17 years or 1.04 ha per annum and the species recorded included Avicennia marina, Bruguiera gymnorhiza and Rhizophora mucronata. The mangrove fern Acrostichum aureum L. was recorded for the first time in the Mkozi estuary. Tree density for all estuaries was between 10 and 2594 trees ha1. The Mngazana and Mntafufu estuaries had the highest tree densities of 2594 and 1402 trees ha1 respectively, typical of riverine mangrove forests. Fringe mangroves were evident in most other systems. Removal of trees for wood has the greatest impact on mangrove cover. Fringe mangrove stands are particularly accessible to harvesters. Only 6% of the current area of trees is afforded some protection in conservation areas. The Mdumbi, Mzamba and Kobonqaba estuaries receive no conservation protection and harvesting has resulted in more than 50% of the trees being removed. The density of dead tree stumps was greater than the number of living trees and no seedlings or juvenile trees were found. Further removal of mangroves within the estuaries south of the Mzimvubu River is expected in the fringe mangroves, as most are unprotected and easily accessible.
Geographical
term
South Africa
Bibliographical
term
Mangroves
Distributions
(30)
Bashee River for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Bashee River for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Kobonqabe Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Kosi Bay for Unreviewed: has not been verified by a taxonomic editorXylocarpus granatum König
Mdumbi Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Mkozi Estuary for Checked: verified by a taxonomic editorAcrostichum aureum L.
Mngazana Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Mngazana Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Mngazana Estuary for Unreviewed: has not been verified by a taxonomic editorRhizophora mucronata Lamk.
Mtafufu Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Mtafufu Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Mtafufu Estuary for Unreviewed: has not been verified by a taxonomic editorRhizophora mucronata Lamk.
Mtakatye Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Mtakatye Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Mtakatye Estuary for Unreviewed: has not been verified by a taxonomic editorRhizophora mucronata Lamk.
Mtamvuna Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Mtata Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Mtata Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Mtata Estuary for Unreviewed: has not been verified by a taxonomic editorRhizophora mucronata Lamk.
Mtentu Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Mtentu Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Mzamba for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Mzintlava Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Mzintlava Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Nqbara Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Nxaxo Estuary for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Nxaxo Estuary for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Nxaxo Estuary for Unreviewed: has not been verified by a taxonomic editorRhizophora mucronata Lamk.
Xora River Mouth for Checked: verified by a taxonomic editorAvicennia marina (Forssk.) Vierh.
Xora River Mouth for Unreviewed: has not been verified by a taxonomic editorBruguiera gymnorrhiza (L.) Lamk.
Edit
history
Date   action   by
2013-01-12 18:30:12Z  created  db_admin
 [Back to search]


Website and databases developed and hosted by VLIZ
Page generated 2016-09-29 GMT+1 · contact: Farid Dahdouh-Guebas