Neogene desertification of Africa
International audience Throughout the Neogene, the faunas and floras in Africa recorded global climatic changes. We present an overview of Neogene desertification in Africa by tracing stable isotopes in eggshells and mammalian enamel, by faunal (changes in hypsodonty, etc.) and floral changes in seq...
Published in: | Comptes Rendus Geoscience |
---|---|
Main Authors: | , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2009
|
Subjects: | |
Online Access: | https://hal.science/hal-04114995 https://doi.org/10.1016/j.crte.2009.03.008 |
id |
ftsorbonneuniv:oai:HAL:hal-04114995v1 |
---|---|
record_format |
openpolar |
spelling |
ftsorbonneuniv:oai:HAL:hal-04114995v1 2024-02-11T09:56:30+01:00 Neogene desertification of Africa Senut, Brigitte Pickford, Martin Ségalen, Loïc Centre de recherche sur la Paléobiodiversité et les Paléoenvironnements (CR2P) Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal.science/hal-04114995 https://doi.org/10.1016/j.crte.2009.03.008 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2009.03.008 hal-04114995 https://hal.science/hal-04114995 BIBCODE: 2009CRGeo.341.591S doi:10.1016/j.crte.2009.03.008 Comptes rendus - Géoscience https://hal.science/hal-04114995 Comptes rendus - Géoscience, 2009, 341, pp.591-602. ⟨10.1016/j.crte.2009.03.008⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2009 ftsorbonneuniv https://doi.org/10.1016/j.crte.2009.03.008 2024-01-23T23:40:01Z International audience Throughout the Neogene, the faunas and floras in Africa recorded global climatic changes. We present an overview of Neogene desertification in Africa by tracing stable isotopes in eggshells and mammalian enamel, by faunal (changes in hypsodonty, etc.) and floral changes in sequences at the latitudinal extremities of the continent and the equator. This work reveals that desertification started in the southwest ca 17-16 Ma, much earlier than the region of the present-day Sahara (ca 8-7 Ma) and long before the deserts in East Africa (Plio-Pleistocene). A consequence of this history is that animals and plants inhabiting the South of the continent had a long period of time in which to adapt to arid, unstable climatic conditions. When parts of East Africa became arid during the Late Miocene and Plio-Pleistocene, several of these lineages expanded northwards and occupied developing arid niches before local lineages could adapt. Several of the latter became extinct, while others withdrew westwards as the tropical forest diminished in extent. It is proposed that the history of desertification in Africa was related to that of the polar ice caps (Antarctic, Arctic). Article in Journal/Newspaper Antarc* Antarctic Arctic HAL Sorbonne Université Arctic Antarctic Comptes Rendus Geoscience 341 8-9 591 602 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Senut, Brigitte Pickford, Martin Ségalen, Loïc Neogene desertification of Africa |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Throughout the Neogene, the faunas and floras in Africa recorded global climatic changes. We present an overview of Neogene desertification in Africa by tracing stable isotopes in eggshells and mammalian enamel, by faunal (changes in hypsodonty, etc.) and floral changes in sequences at the latitudinal extremities of the continent and the equator. This work reveals that desertification started in the southwest ca 17-16 Ma, much earlier than the region of the present-day Sahara (ca 8-7 Ma) and long before the deserts in East Africa (Plio-Pleistocene). A consequence of this history is that animals and plants inhabiting the South of the continent had a long period of time in which to adapt to arid, unstable climatic conditions. When parts of East Africa became arid during the Late Miocene and Plio-Pleistocene, several of these lineages expanded northwards and occupied developing arid niches before local lineages could adapt. Several of the latter became extinct, while others withdrew westwards as the tropical forest diminished in extent. It is proposed that the history of desertification in Africa was related to that of the polar ice caps (Antarctic, Arctic). |
author2 |
Centre de recherche sur la Paléobiodiversité et les Paléoenvironnements (CR2P) Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Senut, Brigitte Pickford, Martin Ségalen, Loïc |
author_facet |
Senut, Brigitte Pickford, Martin Ségalen, Loïc |
author_sort |
Senut, Brigitte |
title |
Neogene desertification of Africa |
title_short |
Neogene desertification of Africa |
title_full |
Neogene desertification of Africa |
title_fullStr |
Neogene desertification of Africa |
title_full_unstemmed |
Neogene desertification of Africa |
title_sort |
neogene desertification of africa |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-04114995 https://doi.org/10.1016/j.crte.2009.03.008 |
geographic |
Arctic Antarctic |
geographic_facet |
Arctic Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
Comptes rendus - Géoscience https://hal.science/hal-04114995 Comptes rendus - Géoscience, 2009, 341, pp.591-602. ⟨10.1016/j.crte.2009.03.008⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2009.03.008 hal-04114995 https://hal.science/hal-04114995 BIBCODE: 2009CRGeo.341.591S doi:10.1016/j.crte.2009.03.008 |
op_doi |
https://doi.org/10.1016/j.crte.2009.03.008 |
container_title |
Comptes Rendus Geoscience |
container_volume |
341 |
container_issue |
8-9 |
container_start_page |
591 |
op_container_end_page |
602 |
_version_ |
1790603684825006080 |