Kaboth-Bahr S, Gosling WD, Vogelsang R, Bahr A, Scerri EML, Asrat A, Cohen AS, Düsing W, Foerster V, Lamb HF, et al. 2021. Paleo-ENSO influence on African environments and early modern humans. Proceedings of the National Academy of Sciences 118(23):e2018277118. https://doi.org/10.1073/pnas.2018277118
Palaeoecology and past environmental research central to the work at the Institute for Biodiversity & Ecosystem Dynamics (University of Amsterdam); check out the new institute video, spot the palaeoecology researchers, and see what else is going on at IBED:
Bush MB. 2020. New and repeating tipping points: The interplay of fire, climate change, and deforestation in Neotropical ecosystems. Annals of the Missouri Botanical Garden 105:393-404. DOI: 10.3417/2020565
In spite of the challenges and uncertainties that the larger scientific community is currently facing, I am delighted and humbled to accept one of the British Ecological Society’s Ecologist in Africa research grant for 2020. The grant will support my historical ecology project whose main goal is to apply palaeoecological and archaeological proxies to investigate the extent of anthropogenic impacts on vegetation structure and composition of one of the Kenyan Central highlands before, during, and after the colonial period.
The Aberdare range forest provide an ideal setting for this study because they have been farmed by local populations since long before colonialism, and they were heavily impacted during colonial times because of their fertile soils. This pilot project aims to reveal the land-use and land-cover dynamics of the Aberdare range forest, and it is hoped that eventually similar studies will be undertaken in other parts of the Kenyan highland forests.
An African Pollen Database data steward training event was held at the Institute for Biodiversity & Ecosystem Dyanmics (University of Amsterdam, 27-29 January 2020) where training in the use of the Neotoma database was provided by Eric Grimm. The participants are now enabled curate and archive data within Neotoma. If you have a palaeoecological data set that you would like to contribute to Neotoma, or if you would like training as well, these people can now help you. Contact details below:
Pollen data recorded in Neotoma for Africa on 24 January 2020. Hopefully after the data steward training event we will have a few more dots on the map, and the potential for many more.
We are delighted to be able to host sixteen researchers of many nationalities conducting research in many different countries. The aim of the training event is to provide researchers with the skills to manage Neotoma and strengthen the African pollen research community. I am excited to be involved, I am confidence that much new research will be brought together, and I hope that we can get good plans in place for further steps and growth of this network.
REFERENCES Vincens, A., Lézine, A.-., Buchet, G., Lewden, D. & Le Thomas, A. (2007) African pollen database inventory of tree and shrub pollen types. Review of Palaeobotany and Palynology 145, 135-141. DOI: 10.1016/j.revpalbo.2006.09.004
Williams, J.W., Grimm, E.C., Blois, J.L., Charles, D.F., Davis, E.B., Goring, S.J., Graham, R.W., Smith, A.J., Anderson, M., Arroyo-Cabrales, J., Ashworth, A.C., Betancourt, J.L., Bills, B.W., Booth, R.K., Buckland, P.I., Curry, B.B., Giesecke, T., Jackson, S.T., Latorre, C., Nichols, J., Purdum, T., Roth, R.E., Stryker, M. & Takahara, H. (2018) The Neotoma Paleoecology Database, a multiproxy, international, community-curated data resource. Quaternary Research 89, 156-177. DOI: 10.1017/qua.2017.105
Fast forward to 2019, the Aguarico is now lined by small homesteads interspersed with larger settlements, some laid out by the oil companies, and a couple of oil ports. I asked our guide how far the park was ahead of us, and he looked surprised and said “We are in it”. When we arrived at the Zancudo River there was a cell tower and a village of probably 30-50 houses on the junction with the Aguarico. Ten minutes downstream was a tourist lodge. What a difference! The frontier had expanded ~140 km down the Aguarico. One family with a shotgun eliminates all game larger than a marmoset within 5 km, and these homesteads were packed so tight it was unsurprising that we saw almost no wildlife.
The cell tower at the village of Zancudococha. Photo: M. Bush.
The next day we ventured onto Zancudococha. The Zancudo stream was still pretty, overhung by trees, and had no barriers to navigation. Three boats full of tourists passed us coming out of the lake, clearly having spent the night there. There were no logs to clear, and the path through the Montricardia marsh was two boats wide. There are only two patches of high, dry land on the edge of the lake. One was regularly used as a campsite and the other had a lodge built on it that was operated intermittently by the Zancudo community.
We saw no monkeys, let alone tapirs, this was an empty forest. But we weren’t there to be ecotourists, we were there to raise a sediment core. This time our questions were about the Pre-Columbian use of the lake. Was the lake occupied prior to European arrival? How much did people alter the forest? Was there a surge of forest regrowth following Conquest? Given these questions, the 1 m of sediment that we recovered with a Universal piston corer was all that we needed. One meter of mud from this system spans about 1500 years and that would provide us with the trajectory of use (or non-use) into the colonial period and its aftermath. Our mood in camp was happy, we had been successful in our intent. So, my message is you can’t go back to find what was there before, but that doesn’t mean that it will be a bad experience. Shifting baselines apply to nature in every setting, but they also apply to science as our questions and interests undergo inter-generational changes.
A broad path through the marsh at Zancudococha. Photo M. Bush
The lodge at Zancudococha. Photo: M. Bush.
Mark Bush is a Professor of Biological Science at the Florida Institute of Technology, Melbourne, FL, USA.