Bouimetarhan, Ilham; Chiessi, Cristiano Mazur; González-Arango, Catalina; Dupont, Lydie M; Voigt, Ines; Prange, Matthias; Zonneveld, Karin A F (2018): Pollen counts of sediment core GeoB16205-4 from Parnaiba, NE Brazil [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.889701, Supplement to: Bouimetarhan, I et al. (2018): Intermittent development of forest corridors in northeastern Brazil during the last deglaciation: Climatic and ecologic evidence. Quaternary Science Reviews, 192, 86-96, https://doi.org/10.1016/j.quascirev.2018.05.026
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Abstract:
The semi-arid northeastern (NE) Brazil vegetation is largely dominated by Caatinga, one of the largest and richest dry forests in the world. Caatinga is a strategic biome, since it has borders with Cerrado, Atlantic forests and the Amazon, acting as a potential corridor (or barrier) for biotic interchange between these regions during evolutionary times. Therefore, accurate reconstructions of past vegetation, ecological and hydrological changes in this area are critical to understanding the dynamics of biome boundaries that may play an important role in dispersal and diversi!cation mechanisms and, more specifically, the link between the long-term climate variability and tropical biodiversity. Here, we present high-resolution palynological and elemental data from marine core GeoB16205-4 retrieved off the Parnaíba River mouth (NE Brazil) mainly covering the Younger Dryas (YD). We show that the YD interval was predominantly wet in NE Brazil, yet it was not homogenous and two distinct phases could be distinguished. A marked intensi!cation of wet conditions between ~12.3 and 11.6 cal kyr BP was recorded by the expansion of tropical rainforest and tree ferns. These results are in agreement with the transient TraCE-21k coupled climate model simulation. We infer that the second pluvial phase of the YD is related to a weak AMOC due to meltwater pulses in the North Atlantic, which forces a southward shift of the Intertropical Convergence Zone and its associated rainfall. Our records provide new evidence on the establishment of an “eastern forest corridor” in the nowadays semi-arid Caatinga allowing for past biotic interchanges of plant species.
Project(s):
Coverage:
Latitude: -1.351833 * Longitude: -43.096667
Date/Time Start: 2012-02-23T23:32:00 * Date/Time End: 2012-02-23T23:32:00
Minimum DEPTH, sediment/rock: 0.10 m * Maximum DEPTH, sediment/rock: 4.00 m
Event(s):
GeoB16205-4 (056-4) * Latitude: -1.351833 * Longitude: -43.096667 * Date/Time: 2012-02-23T23:32:00 * Elevation: -1955.0 m * Recovery: 6.2 m * Location: Continental Slope Northeast Brazil * Campaign: MSM20/3 (AMADEUS) * Basis: Maria S. Merian * Method/Device: Gravity corer (Kiel type) (SL) * Comment: Geology, 620 cm
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | AGE | Age | ka BP | Bouimetarhan, Ilham | Geocode | |
| 2 | DEPTH, sediment/rock | Depth sed | m | Bouimetarhan, Ilham | Geocode | |
| 3 | Gramineae | Graae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 4 | Cyperaceae | Cypae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 5 | Rhizophora | Rhiz | # | Bouimetarhan, Ilham | Counting, palynology | Rhizophoraceae |
| 6 | Typha | Typ | # | Bouimetarhan, Ilham | Counting, palynology | Typhaceae |
| 7 | Gramineae | Graae | # | Bouimetarhan, Ilham | Counting, palynology | 25 µm |
| 8 | Podocarpus | Pod | # | Bouimetarhan, Ilham | Counting, palynology | |
| 9 | Artemisia | Art | # | Bouimetarhan, Ilham | Counting, palynology | |
| 10 | Asteroideae | Asteroideae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 11 | Ephedra distachya-type | Eph.d-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 12 | Ephedra fragilis-type | Eph.f-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 13 | Amaranthaceae/Chenopodiaceae | Chen/Amar | # | Bouimetarhan, Ilham | Counting, palynology | |
| 14 | Plantago | Pla | # | Bouimetarhan, Ilham | Counting, palynology | |
| 15 | Acacia | Aca | # | Bouimetarhan, Ilham | Counting, palynology | |
| 16 | Boscia-type | Boscia-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 17 | Mitracarpus | Mitracar | # | Bouimetarhan, Ilham | Counting, palynology | |
| 18 | Ziziphus | Ziziphus | # | Bouimetarhan, Ilham | Counting, palynology | |
| 19 | Mimosa-type | Mimosa-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 20 | Borreria | Borreria | # | Bouimetarhan, Ilham | Counting, palynology | |
| 21 | Cassia-type | Cassia-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 22 | Celtis | Cel | # | Bouimetarhan, Ilham | Counting, palynology | |
| 23 | Phyllanthus-type | Phyllanthus-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 24 | Piliostigma | Piliosti | # | Bouimetarhan, Ilham | Counting, palynology | |
| 25 | Vernonia-type | Vernonia-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 26 | Alchornea | Alchornea | # | Bouimetarhan, Ilham | Counting, palynology | |
| 27 | Stereospermum-type | Stereospermum-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 28 | Euphorbia-type | Eup-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 29 | Rubiaceae spp. | Rubiaceae spp. | # | Bouimetarhan, Ilham | Counting, palynology | |
| 30 | Galium | Gal | # | Bouimetarhan, Ilham | Counting, palynology | |
| 31 | Alchornea | Alchornea | # | Bouimetarhan, Ilham | Counting, palynology | |
| 32 | Ilex | Ile | # | Bouimetarhan, Ilham | Counting, palynology | Schinus/Aquifoliaceae |
| 33 | Scrophulariaceae/Solanaceae | Scrophulariaceae/Solanaceae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 34 | Fabaceae | Fabae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 35 | Rutaceae | Rutae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 36 | Caesalpiniaceae | Caesalpiniaceae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 37 | Hedyosmum/Convolvulaceae | Hedyosmum/Convolvulaceae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 38 | Anacardiaceae | Anaae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 39 | Acanthaceae | Acanteae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 40 | Bertiera-type | Bertiera-T | # | Bouimetarhan, Ilham | Counting, palynology | |
| 41 | Ambrosia | Amb | # | Bouimetarhan, Ilham | Counting, palynology | |
| 42 | Trichilia | Trichili | # | Bouimetarhan, Ilham | Counting, palynology | |
| 43 | Malvaceae | Malvae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 44 | Arecaceae | Arecceae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 45 | Myricaceae | Myrae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 46 | Didynopamax | Didynopamax | # | Bouimetarhan, Ilham | Counting, palynology | Euphorbiaceae |
| 47 | Sporomorphs indeterminables | Sporomorphs indet | # | Bouimetarhan, Ilham | Counting, palynology | |
| 48 | Melastomataceae | Melast | # | Bouimetarhan, Ilham | Counting, palynology | |
| 49 | Burseraceae | Bursceae | # | Bouimetarhan, Ilham | Counting, palynology | |
| 50 | Pollen, total | Pollen tot | # | Bouimetarhan, Ilham | Counting, palynology | |
| 51 | Spores total | Spores tot | # | Bouimetarhan, Ilham | Counting, palynology | |
| 52 | Pollen and spores | Pollen+spores | # | Bouimetarhan, Ilham | Counting, palynology | total |
| 53 | Particle, charred | Particle charred | # | Bouimetarhan, Ilham | Counting, palynology |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
933 data points