The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa)
The Zanzibar Archipelago is the largest reef system in eastern Africa and represents the transition from the high-diversity region of the Asian Indo-Pacific to the cold-water areas of southern Africa. It is among the most productive and biologically rich ecosystems along eastern Africa and provides...
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ftunivbonn:oai:bonndoc.ulb.uni-bonn.de:20.500.11811/6388 2023-05-15T17:51:48+02:00 The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa) Thissen, Jens Michael Langer, Martin R. McCann, Tom 2015-01-08 application/pdf https://hdl.handle.net/20.500.11811/6388 eng eng Universitäts- und Landesbibliothek Bonn info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:5n-38667 https://hdl.handle.net/20.500.11811/6388 In Copyright http://rightsstatements.org/vocab/InC/1.0/ openAccess Foraminiferen Ostafrika Riffe Karbonatproduktion Biodiversität Foraminifera East Africa Reefs Carbonate production Biodiversity ddc:550 doc-type:doctoralThesis 2015 ftunivbonn https://doi.org/20.500.11811/6388 2023-02-13T19:26:37Z The Zanzibar Archipelago is the largest reef system in eastern Africa and represents the transition from the high-diversity region of the Asian Indo-Pacific to the cold-water areas of southern Africa. It is among the most productive and biologically rich ecosystems along eastern Africa and provides valuable benefits to coastal people. The Zanzibar Archipelago consists of the three major islands Zanzibar, Pemba and Mafia Island. These islands face an intensifying array of threats, including impacts from growing tourism, coastal development, overfishing, anthropogenic runoff, and consequences from global climate change (ocean acidification, temperature stress, bleaching). The combination of global and local stressors makes reefs increasingly susceptible to disturbance and ultimately reduces their capabilities to maintain their physical structure. Despite widespread recognition that the reefs along eastern Africa are seriously endangered, information on foraminifera, a prominent group of reefal carbonate producers, is limited. In this project the spatial distribution, composition, diversity and environmental significance of foraminiferal faunal assemblages in shallow-water reefal ecosystems were studied. For the first time in this area, a catalog of 167 species belonging to 98 genera, all illustrated by scanning electron microscopy, was established. The structure of the foraminiferal fauna was analyzed in different habitats that have been identified using statistical analyses, including observations made in the field. Quantitative faunal analyses of sediment samples show the presence of seven macro-habitats around the three islands of the Zanzibar Archipelago, characterized by specific indicator taxa: 1.) the nearshore habitat in the vicinity of mangrove forests, dominated by opportunistic species able to withstand eutrophic conditions, 2.) the shallow lagoon habitat, characterized by smaller porcelaneous foraminifera, 3.) the shallow and extremely warm reef flats, dominated by a single species adapted to extreme ... Doctoral or Postdoctoral Thesis Ocean acidification bonndoc - The Repository of the University of Bonn Pacific |
institution |
Open Polar |
collection |
bonndoc - The Repository of the University of Bonn |
op_collection_id |
ftunivbonn |
language |
English |
topic |
Foraminiferen Ostafrika Riffe Karbonatproduktion Biodiversität Foraminifera East Africa Reefs Carbonate production Biodiversity ddc:550 |
spellingShingle |
Foraminiferen Ostafrika Riffe Karbonatproduktion Biodiversität Foraminifera East Africa Reefs Carbonate production Biodiversity ddc:550 Thissen, Jens Michael The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa) |
topic_facet |
Foraminiferen Ostafrika Riffe Karbonatproduktion Biodiversität Foraminifera East Africa Reefs Carbonate production Biodiversity ddc:550 |
description |
The Zanzibar Archipelago is the largest reef system in eastern Africa and represents the transition from the high-diversity region of the Asian Indo-Pacific to the cold-water areas of southern Africa. It is among the most productive and biologically rich ecosystems along eastern Africa and provides valuable benefits to coastal people. The Zanzibar Archipelago consists of the three major islands Zanzibar, Pemba and Mafia Island. These islands face an intensifying array of threats, including impacts from growing tourism, coastal development, overfishing, anthropogenic runoff, and consequences from global climate change (ocean acidification, temperature stress, bleaching). The combination of global and local stressors makes reefs increasingly susceptible to disturbance and ultimately reduces their capabilities to maintain their physical structure. Despite widespread recognition that the reefs along eastern Africa are seriously endangered, information on foraminifera, a prominent group of reefal carbonate producers, is limited. In this project the spatial distribution, composition, diversity and environmental significance of foraminiferal faunal assemblages in shallow-water reefal ecosystems were studied. For the first time in this area, a catalog of 167 species belonging to 98 genera, all illustrated by scanning electron microscopy, was established. The structure of the foraminiferal fauna was analyzed in different habitats that have been identified using statistical analyses, including observations made in the field. Quantitative faunal analyses of sediment samples show the presence of seven macro-habitats around the three islands of the Zanzibar Archipelago, characterized by specific indicator taxa: 1.) the nearshore habitat in the vicinity of mangrove forests, dominated by opportunistic species able to withstand eutrophic conditions, 2.) the shallow lagoon habitat, characterized by smaller porcelaneous foraminifera, 3.) the shallow and extremely warm reef flats, dominated by a single species adapted to extreme ... |
author2 |
Langer, Martin R. McCann, Tom |
format |
Doctoral or Postdoctoral Thesis |
author |
Thissen, Jens Michael |
author_facet |
Thissen, Jens Michael |
author_sort |
Thissen, Jens Michael |
title |
The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa) |
title_short |
The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa) |
title_full |
The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa) |
title_fullStr |
The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa) |
title_full_unstemmed |
The Foraminifera of the Zanzibar Archipelago : (Tanzania, East Africa) |
title_sort |
foraminifera of the zanzibar archipelago : (tanzania, east africa) |
publisher |
Universitäts- und Landesbibliothek Bonn |
publishDate |
2015 |
url |
https://hdl.handle.net/20.500.11811/6388 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:5n-38667 https://hdl.handle.net/20.500.11811/6388 |
op_rights |
In Copyright http://rightsstatements.org/vocab/InC/1.0/ openAccess |
op_doi |
https://doi.org/20.500.11811/6388 |
_version_ |
1766159057946673152 |