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Environmental varia...
Environmental variability in northern Tanzania from c. AD 1000 to 1800, as inferred from diatoms and pollen in Lake Duluti
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- Öberg, Helena, 1974- (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Norström, Elin (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Ryner, Maria (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Holmgren, Karin (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Westerberg, Lars-Ove (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- Risberg, Jan (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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Dögg Eddudóttir, Sigrún (author)
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- Muzuka, Alfred (author)
- Institute of Marine Science, University of Dar es Salaam
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(creator_code:org_t)
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Fossil pollen and diatoms have been analysed in a sediment sequence from a topographically closed crater lake in northern Tanzania(Lake Duluti), with the aim to reconstruct past changes in lake level and vegetation dynamics. The results contribute with a new paleoenvironmental record from equatorial Africacovering the period c. AD 1000 to AD 1800. Overall, the pollen and diatom records generate comparative stories of dry and wet periods. Dry conditions are inferred at c. AD 1040–1470, c. AD 1510–1640 and c. AD 1650–1670 with the lowest lake levels at c. AD 1260–1290 and AD 1600–1640. Wetter conditions occurred c. AD 1640–1650 and c. AD 1670–1790. The chronology is based on combined analyses of 210Pb activity and AMS 14C on bulk sediment, and a Bayesian model was applied to establish the age-depth relationship. The hydroclimatic record fromLakeDuluti shows good correlation with several East African lakes although precise comparison is hampered by dating uncertainties.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
Keyword
- Diatoms
- Pollen
- Crater lake
- Tanzania
- Palaeolimnology
- Physical Geography
- naturgeografi
- kvartärgeologi
- Quarternary Geology
Publication and Content Type
- vet (subject category)
- ovr (subject category)
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