Pollen-vegetation richness and diversity relationships in the tropics

Pollen-vegetation richness and diversity relationships in the tropics

Tracking changes in biodiversity through time requires an understanding of the relationship between modern diversity and how this diversity is preserved in the fossil record. Fossil pollen is one way in which past vegetation diversity can be reconstructed. However, there is limited understanding of...

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Published in:Vegetation history and archaeobotany Vol. 27; no. 2; pp. 411 - 418
Main Authors: Gosling, William D., Julier, Adele C. M., Adu-Bredu, Stephen, Djagbletey, Gloria D., Fraser, Wesley T., Jardine, Phillip E., Lomax, Barry H., Malhi, Yadvinder, Manu, Emmanuel A., Mayle, Francis E., Moore, Sam
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Science + Business Media 01-03-2018
Springer Berlin Heidelberg
Springer Nature B.V
Subjects:
Anthropology
Archaeology
Biodiversity
Biogeosciences
Climate Change
Coniferous forests
Deciduous forests
Dry forests
Earth and Environmental Science
Earth Sciences
Forests
Fossil pollen
Fossils
Paleontology
Pollen
Pollination
Rain
Savannahs
SHORT COMMUNICATION
Traps
Tropical environments
Vegetation
Palynology
Pollen trap
Neotropics
Palaeotropics
Forest-savannah
Savanna
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Summary:Tracking changes in biodiversity through time requires an understanding of the relationship between modern diversity and how this diversity is preserved in the fossil record. Fossil pollen is one way in which past vegetation diversity can be reconstructed. However, there is limited understanding of modern pollen-vegetation diversity relationships from biodiverse tropical ecosystems. Here, pollen (palynological) richness and diversity (Hill N₁) are compared with vegetation richness and diversity from forest and savannah ecosystems in the New World and Old World tropics (Neotropics and Palaeotropics). Modern pollen data were obtained from artificial pollen traps deployed in 1-ha vegetation study plots from which vegetation inventories had been completed in Bolivia and Ghana. Pollen counts were obtained from 15 to 22 traps per plot, and aggregated pollen sums for each plot were >2,500. The palynological richness/diversity values from the Neotropics were moist evergreen forest = 86/6.8, semi-deciduous dry forest = 111/21.9, wooded savannah = 138/31.5, and from the Palaeotropics wet evergreen forest = 144/28.3, semi-deciduous moist forest = 104/4.4, forest-savannah transition = 121/14.1; the corresponding vegetation richness/diversity was 100/36.7, 80/38.7 and 71/39.4 (Neotropics), and 101/54.8, 87/45.5 and 71/34.5 (Palaeotropics). No consistent relationship was found between palynological richness/diversity, and plot vegetation richness/diversity, due to the differential influence of other factors such as landscape diversity, pollination strategy, and pollen source area. Palynological richness exceeded vegetation richness, while pollen diversity was lower than vegetation diversity. The relatively high global diversity of tropical vegetation was found to be reflected in the pollen rain.
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Communicated by H.J.B. Birks.
ISSN:0939-6314
1617-6278
DOI:10.1007/s00334-017-0642-y