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Palaeobotanical studies from tropical Africa: relevance to the evolution of forest, woodland and savannah biomes.
Philos Trans R Soc Lond B Biol Sci. 2004 Oct 29; 359(1450):1573-83.PT

Abstract

Fossil plants provide data on climate, community composition and structure, all of which are relevant to the definition and recognition of biomes. Macrofossils reflect local vegetation, whereas pollen assemblages sample a larger area. The earliest solid evidence for angiosperm tropical rainforest in Africa is based primarily on Late Eocene to Late Oligocene (ca. 39-26 Myr ago) pollen assemblages from Cameroon, which are rich in forest families. Plant macrofossil assemblages from elsewhere in interior Africa for this time interval are rare, but new work at Chilga in the northwestern Ethiopian Highlands documents forest communities at 28 Myr ago. Initial results indicate botanical affinities with lowland West African forest. The earliest known woodland community in tropical Africa is dated at 46 Myr ago in northern Tanzania, as documented by leaves and fruits from lake deposits. The community around the lake was dominated by caesalpinioid legumes, but included Acacia, for which this, to my knowledge, is the earliest record. This community is structurally similar to modern miombo, although it is different at the generic level. The grass-dominated savannah biome began to expand in the Middle Miocene (16 Myr ago), and became widespread in the Late Miocene (ca. 8 Myr ago), as documented by pollen and carbon isotopes from both West and East Africa.

Authors+Show Affiliations

Environmental Science Program, Southern Methodist University, PO Box 750395, Dallas, TX 75275-0395, USA. bjacobs@mail.smu.edu

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

15519973

Citation

Jacobs, Bonnie F.. "Palaeobotanical Studies From Tropical Africa: Relevance to the Evolution of Forest, Woodland and Savannah Biomes." Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, vol. 359, no. 1450, 2004, pp. 1573-83.
Jacobs BF. Palaeobotanical studies from tropical Africa: relevance to the evolution of forest, woodland and savannah biomes. Philos Trans R Soc Lond, B, Biol Sci. 2004;359(1450):1573-83.
Jacobs, B. F. (2004). Palaeobotanical studies from tropical Africa: relevance to the evolution of forest, woodland and savannah biomes. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 359(1450), 1573-83.
Jacobs BF. Palaeobotanical Studies From Tropical Africa: Relevance to the Evolution of Forest, Woodland and Savannah Biomes. Philos Trans R Soc Lond, B, Biol Sci. 2004 Oct 29;359(1450):1573-83. PubMed PMID: 15519973.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Palaeobotanical studies from tropical Africa: relevance to the evolution of forest, woodland and savannah biomes. A1 - Jacobs,Bonnie F, PY - 2004/11/3/pubmed PY - 2004/12/28/medline PY - 2004/11/3/entrez SP - 1573 EP - 83 JF - Philosophical transactions of the Royal Society of London. Series B, Biological sciences JO - Philos. Trans. R. Soc. Lond., B, Biol. Sci. VL - 359 IS - 1450 N2 - Fossil plants provide data on climate, community composition and structure, all of which are relevant to the definition and recognition of biomes. Macrofossils reflect local vegetation, whereas pollen assemblages sample a larger area. The earliest solid evidence for angiosperm tropical rainforest in Africa is based primarily on Late Eocene to Late Oligocene (ca. 39-26 Myr ago) pollen assemblages from Cameroon, which are rich in forest families. Plant macrofossil assemblages from elsewhere in interior Africa for this time interval are rare, but new work at Chilga in the northwestern Ethiopian Highlands documents forest communities at 28 Myr ago. Initial results indicate botanical affinities with lowland West African forest. The earliest known woodland community in tropical Africa is dated at 46 Myr ago in northern Tanzania, as documented by leaves and fruits from lake deposits. The community around the lake was dominated by caesalpinioid legumes, but included Acacia, for which this, to my knowledge, is the earliest record. This community is structurally similar to modern miombo, although it is different at the generic level. The grass-dominated savannah biome began to expand in the Middle Miocene (16 Myr ago), and became widespread in the Late Miocene (ca. 8 Myr ago), as documented by pollen and carbon isotopes from both West and East Africa. SN - 0962-8436 UR - https://www.unboundmedicine.com/medline/citation/15519973/Palaeobotanical_studies_from_tropical_Africa:_relevance_to_the_evolution_of_forest_woodland_and_savannah_biomes_ L2 - https://royalsocietypublishing.org/doi/full/10.1098/rstb.2004.1533?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -