Reports | Ecology of the past

Past environmental change on Samoa

February 16, 2016
WDG

Zoe and William just after the graduation ceremony (UvA)

Two students (Zoe van Kemenade and Tessa Driessen) have recently completed projects looking at past environmental change on Samoa working in the Research Group of Palaeoecology & Landscape Ecology at the University of Amsterdam (UvA). Zoe’s project, part of her BSc Future Planet Studies (major Earth Sciences) at UvA, was entitled “A multi‐proxy analysis on the effect of climate and human activity on the environment of Samoa during the Holocene” and investigated charcoal, macro-fossils, and algae. Tessa’s project, “Biodiversity, fire and human dynamics on Samoa over the last 9200 years”, was completed as an internship during her MSc in Environmental Biology at Utrecht University (UU) that was co-supervised by Rike Wagner-Cremer. Tessa focused on the fossil pollen record to reconstruct past vegetation change. Both projects were conducted in cooperation with Jon Hassel and David Sear (both University of Southampton) who provided access to the Samoan sediments; for more on the Southampton Pacific Islands projects check out their blog Palaeoenvironmental Laboratory at the University of Southampton.

The results from both projects, and work by the University of Southampton team, will be presented at this years GTO conference (European conference of tropical ecology) in Gottingen next week.

William giving his personal view on the work of Tessa at her gradation ceremony (Utrecht University)

William giving his personal view on the work of Tessa at her gradation ceremony (UU)

Netherlands Annual Ecology Meeting 2016 – day 2

February 10, 2016
WDG

Netherlands Annual Ecology Meeting (NAEM) 2016
10 February 2016
Conference Centre “De Werelt”, Lunteren

Day 2 of the NAEM breakfast 07:30, first lectures at 08:30… Two keynotes today thinking about ecological stoichiometry the first by Stan Harpole (Martin-Luther-Universitat-Halle-Wittenberg) focused on resource ratio theory, and then Martin Wassen (Utrecht University) thinking about N and P limitations. I also attended, parts of, three sessions today “Linkages between fire, vegetation, soil and ecosystem services”, “Novel ecosystems”, and “Scaling from trait to environment and back”. My top talks for today were:

Elmar Veenendaal (Wageningen University) Fire effects on tropical woody vegetation structure have been exaggerated?
Working on long-term fire study plots (Kokondekro since 1932) suggest that for forest-savannah transition zones fire alone is insufficient to mediate a change between states; human manipulation of ecosystems is required as well to trigger the change.
Frank van Langevelde (Wageningen University) Feedbacks between fire and patches of woody vegetation in tropical grassland savannah
Examination of tree distributions and fire within the Kruger National Park shows that landscapes contain more clustered tree populations when fire frequency is higher.

Plus today I have done lots of talking and made many new contacts. I have lots of follow up emails to write and promised papers to send around! Overall this has been a super meeting for meeting people – perfect for expanding my network of Dutch based ecologists – in a nice location, with good food and beer. Looking forward to next year already.

Netherlands Annual Ecology Meeting 2016 – day 1

February 10, 2016
WDG

Netherlands Annual Ecology Meeting (NAEM) 2016
9 February 2016
Conference Centre “De Werelt”, Lunteren

The annual Dutch ecology conference is being held over two days at the in “remote” Lunteren and I am pleased to be able to attend all of the conference this year. The conference was kicked off this morning with a recognition that this year is 150 years since the birth of ecology as a science (Haeckel, 1866). The opening two keynotes focused on aspects of ecology which have sometimes been overlooked firstly, parasitism (Peter Hudson, Penn State University) and secondly, immunology (Irene Tieleman, University of Groningen). Following these I focused on just two sessions in the morning “linking diversity to function”, and in the afternoon “ecosystem cascades”. From the range of excellent talks in the sessions I have picked one from each as my favourite:

Masha van der Sande (Wageningen University) The role of biodiversity and environment on productivity in tropical forests; evidence across scales
By examining long-term tropical forest monitoring data van der Sande demonstrated that through time ecosystem traits changed significantly. She hypothesised that the lack of stability in ecosystem traits was due to past disturbance; although it is unclear what caused this disturbance (climate or humans), or when it occurred.
Dries Kuijper (Mammal Research Institute, Poland) Landscapes of fear in Europe: Wolves and humans shaping ungulate top-down effects
By tracking Wolf pack distributions in the Bialowieza forest (Poland) Kuijper showed that ungulates avoided Wolf pack “core areas” for fear of predation, that the exclusion of ungulates lead to reduced browsing of the vegetation, and so consequently forests regenerated faster in Wolf pack core areas.

The evening lecture was given by Bart Knols (in2care) who gave an impassioned talk on the importance of communicating science beyond the academic sphere. Arguing that now is the time for ecologists to have an influence on policy making, politics and business, as well as showing us how he has done this.

Great day.

BES annual meeting: Top talks

December 17, 2015
WDG

I am just back from a fabulous British Ecological Society (BES) annual meeting in Edinburgh. Both the city and the science were interesting and exciting. The Science Slam was certainly my highlight “fringe” event and I believe all the slams will be avaliable to view soon on the BES Youtube channel. But you can watch the winner, Rosie Woodroffe, now…

Of the many great science talks I would like to highlight just four here which I found particulalry interesting, by: Stephen Prentice (Queen’s University Belfast), Althea Davies (University of St. Andrews), Tom August (Cente for Ecology & Hydrology), and Kimberly Simpson (University of Sheffield).

Palynologendagen 2015

October 13, 2015
WDG

Palynologendagen
“Een historisch-ecologische benadering van het landschap in noord-oost Twente”
(“A historical-sociological approach to understanding landscapes in north-east Twente”)
8-9 October 2015
Organized by: Harm Smeenge, Bas van Geel & Stefan Engels
For the: Palynologische Kring

Last week I took part in my first “palynologendagen” (pollen days) with the Palynologische Kring (Dutch palynology society). Unfortunately, due to a prior commitment (Chairing a British Ecological Society careers webinar) I was only able to take part on the second day.

Day two of the pollen days was “op de fiets” (on bikes) in true Dutch style. We met at Twente Fiets to pick up 36 bicycles and one tandem and headed out into the countryside!

Figure 1: Route of the bicycle tour (max speed 21.8 kmph, distance 23.24 km)

Our route (Fig. 1) took in around 14 point of interest. At each point Harm provided interesting insights into the landscape history and how humans had interacted and shaped it. The presentations were in Dutch so I had to concentrate hard to get 50% of the information.

Two particularly nice sites (which I think I understood) were:

the site of an old toll house at the split in the old road to Germany (east) and Scandinavia (north), and
a sedimentary cross section, revealed by river down cutting, which showed the impact of cart wheels on the sediment along the site of an old road.

In addition to the tour it was also fantastic to meet many other fellow palynologists based in the Netherlands. I looking forward to being able to participate in many future Palynologische Kring events, and I am also pleased to say attending this years event has inspired me again to try and push on with learning Dutch again!

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Palaeoecology at UvA and Twente 2015: Teaching and Learning

September 21, 2015
cmcmicha

By Crystal McMichael

The month-long palaeoecology module at UvA is coming to an end. We have had two weeks of lectures and microscope work, an introduction to quantitative palaeoecology, and we just finished a week of fieldwork in Twente, which is in the easternmost part of the Netherlands.

Students working in the field (photo: M. Groot)

Will Gosling and I tried something new for the field excursion this year. We split the class into eight groups, and gave each group a set of pollen and phytolith samples from an ‘unknown location’. Unknown in this context means being from one of the eight primary sites that we would visit during the field excursion. The students were required to perform vegetation surveys and characterize soils at each of the primary sites that we visited. The goal of each group was to figure out which location their set of ‘unknown’ samples came from. Basically, we had them doing forensic palynology, with idea that they could then better visualize the different vegetation assemblages seen in the palaeoecological records.
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XPERT field photos Lake Erazo

Palaeoenvironment

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Andean bear

April 30, 2015
WDG

Palaeoenvironment

On our first field day three of the XPERT team (Valerie, Barry and Sarah) claim they saw an Andean or spectacled bear (Tremarctos ornatus) in the paramo of the Cayambe-Coca National Park… Valerie did manage to provided some supporting evidence in the way photos.

An Andean bear, or a black dog? (photo: van den Bos)

For more information on Andean bears visit: Andean bear foundation

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Sediment coring in Lake Erazo

April 14, 2015
WDG

XPERT field school is underway…

Palaeoenvironment

Sediment coring on Lake Erazo. Photo by Valerie van den Bos (who spent the flight over reading a book on how to take the perfect photo)

By Alexandra Lee and Nick Primmer

To study the palaeo-environmental record of the Andean cloud forest, sediment cores were taken from the recently discovered Erazo lake. In mixed conditions of blazing sun and pouring rain, 14 researchers, one bus driver and several Ecuadorian guides hauled what felt like a ton of equipment up to the lake 2,300 m asl. In the centre of the lake, a wooden coring platform was mounted between two boats securely anchored at three positions. Using a modified Livingston corer with a drop hammer, five cores were successfully recovered from the lake up to a maximum depth of two metres. The main challenge encountered was the stability of the platform which resulted in several complications limiting the number of cores…

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Tropical Botany in Belize: Part 2 – Las Cuevas

April 1, 2015
nicholasloughlin

Tropical Botany in Belize

By Nick Loughlin

Figure 1: Las Cueavs Forest Reseach Station (Photograph by Anna Turbelin)

As mentioned in my last post I have recently returned from a 2 week field course in tropical botany run by the Royal Botanic Garden Edinburgh (RBGE) in conjunction with their MSc course on the ‘Biodiversity and Taxonomy of Plants’. The field course allowed for 10 NERC funded PhD students in relevant fields to accompany the MSc students out to Belize to learn a host of valuable skills in tropical botany and ecology.

To find out what we did read on…