Palynologische Kring: Jaarvergadering en lezingenmiddag
Date: 20 June 2025 / 20 juni 2025
Location: Minnaertgebouw, Utrecht Science Park
13.15: arrival / inloop
13.30-14.30: Annual meeting / Jaarvergadering
14.30-14.55: Tobias Vervaart MSc (Universiteit Utrecht): Introducing PhD project ‘Looking back to plan ahead: unfolding the natural heritage of Dutch landscapes’.
14.55-15.15: coffee break
15.15-15.40: Yannick Bats MSc (Universiteit Utrecht): Impact of chemical treatments on the molecular and stable carbon isotopic composition of sporomorphs.
15.40-16.10: Prof Dr. Corrie Bakels (Faculteit der Archeologie, Universiteit Leiden): Results from stable isotope analysis applied to charred grain preserved in two storage rooms found in Tell Damiyah, Jordan.
16.10-16.35: Dr. Otto Brinkkemper (Rijksdienst voor het Cultureel Erfgoed): The optimal sample size of cereal grains for stable isotope research.
My first AFQUA conference really began the day before the conference proper started in the Kenyan immigration queue where I met a number of fellow delegates who were flying in from all over the world. It was great to start to put faces to names of people who’s work I had read for many years. Once out of the airport transfer to the hotel was smooth, and it was with some excitement that the following morning I made the short walk from the hotel to the famous Nairobi National Museum for the start of the conference.
Day 1
Prof. Andy Cohen (one of my fellow delegates in the immigration line) kicked off the AFQUA conference with a plenary giving an overview of African continental drilling projects. He traced the dream of the recovery of long continental records back to Daniel Livingstone and Neil Opdyke’s workshop from 1980 that set out the dream of obtaining long records from the continent. He then went on to give examples of how multi-millennial lake records, including Lake Malawi, can be used to understand the tempo of ecological change.
The first session of the conference, entitled “East Africa”, included: exciting evidence of Deinotherium the largest land mammal of the Quaternary (J.-P. Brugal), the use of d13C in determining homonin ecology (V.M. Iminjili), and evidence from a new c. 200,000 year old site at Natodomeri (Kenya) that contains evidence of homonids, elephids, giant lions and pigmy hippos (F.K. Manthi).
The second session of AFQUA covered “The environmental context for homonin evolution and dispersal”. This started with geochemical data from Chew Bahir that sheds light on potential drivers of climatic shifts (F. Schabitz), and included examination of changes climate between c. 500,000 and 320,000 years ago that coincided with the shift from hominid use of large cutting tools to smaller implements (R. Potts), and discussion of the environment the route which hominids took out of Africa (F. Henselowsky).
COMMENT ON THE USE OF NITROGEN ISOTOPES IN PALAEOLIMOLOGICAL STUDIES As a component of my doctoral research, I am examining nitrogen (N) isotopes within sediments obtained from Lake Bosumtwi (West Africa). Below I review and comment on the key uses and limitations of using N isotopes to interpret past environmental change with particular reference to lake sediments. Discussion is based on the key text by Talbot (2001).
REFERENCE
Talbot, M.R. 2001. Nitrogen isotopes in palaeolimnology. Tracking environmental change using lake sediments. Volume 2. Physical and geochemical methods (ed. by W.M. Last and J.P. Smol), pp. 401-439. Kluwer Academic Press, Dordrecht.
Ecology of the past 