Nick Schafstall

Nick Schafstall
Czech University of Life Sciences Prague | CULS · Department of Forest Management

PhD
Bark beetle outbreaks and changing diversity of forest beetles through time. Looking for collab on peat chronologies.

About

12
Publications
2,549
Reads
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23
Citations
Introduction
In my PhD, I focused on the identification of sub-fossil bark beetles and reconstruction of a forest beetle community through time. This initial work of my portfolio shows methods to identify past bark beetle outbreaks in a Norway spruce forest in Central Europe, Slovakia. My new postdoctoral position on the BESTFORCE project allows for further exploration of the role of (bark) beetles in past forest dynamics, in the Eastern Carpathians. Looking for a job from 2023.
Additional affiliations
July 2016 - December 2018
Czech University of Life Sciences Prague
Position
  • Researcher
Description
  • Identifying insect remains from Holocene lake sediments and peat sediments, interpreting beetle assemblages and correlating insect proxies to pollen, charcoal and geochemistry records.
April 2011 - June 2011
Utrecht University
Position
  • Researcher
Description
  • Identified pollen samples from an Early Holocene site in Norway
Education
October 2016 - October 2020
Czech University of Life Sciences Prague
Field of study
  • Quaternary entomology
September 2010 - August 2012
Utrecht University
Field of study
  • Environmental Biology
September 2006 - August 2009
Utrecht University
Field of study
  • Biology

Publications

Publications (12)
Article
Temperate mountain forests have experienced an increase in frequency and severity of natural disturbances (e.g., droughts, fires, windstorms and insect outbreaks) in recent decades due to climate and environmental change. Outbreaks of bark beetles have caused significant dieback of conifer forests in Central Europe and it is essential to model and...
Article
Full-text available
In January 2020, a survey was sent to PAGES early-career researchers (ECRs) to assess their understanding of PAGES' structure, awareness of support offered by the PAGES Early-Career Network (ECN; pastglobalchanges.org/ecn), and the involvement of ECRs in working groups (WGs). The latter assessment serves as an important baseline metric for active e...
Article
Full-text available
The PAGES Early-Career Network (ECN; pastglobalchanges.org/ecn) was developed to create a permanent platform for earlycareer researchers (ECRs) to exchange ideas, perform outreach, engage in skill development, and find collaborations among fellow ECRs within PAGES.
Article
Disentangling the long-term changes in forest disturbance dynamics provides a basis for predicting the forest responses to changing environmental conditions. The combination of multidisciplinary records can offer more robust reconstructions of past forest disturbance dynamics. Here we link disturbance histories of the central European mountain spru...
Data
This is the raw data with fossil records from Europe and North America with conifer bark beetle remains. many records were extracted from the databases Bugscep.com and Neotomadb.org, but some are unpublished records. The database is currently being expanded beyond the original research criteria with more bark beetle species and sites of older age.
Article
Montane biomes are niche environments high in biodiversity with a variety of habitats. Often isolated, these non-continuous remnant ecosystems inhabit narrow ecological zones putting them under threat from changing climatic conditions and anthropogenic pressure. Twelve sediment cores were retrieved from a peat bog in Tatra National Park, Slovakia,...
Article
Outbreaks of conifer bark beetles in Europe and North America have increased in scale and severity in recent decades. In this study, we identify existing fossil records containing bark beetle remains from the end of the Last Glacial Maximum (~14,000 cal. yr BP) to present day using the online databases Neotoma and BugsCEP and literature searches, a...
Book
Full-text available
After 19 years, Romania has the second time the oportunity to organize this meeting. Thus, the Forestry Faculty from the ”Ștefan cel Mare” University of Suceava, has the honour to organise this important conference, in Suceava, in the main town of the Romanian part of historical province Bucovina, famous for the Princely Fortress and the medieval p...
Conference Paper
Full-text available
Norway spruce is a dominant keystone species in the montane coniferous forests in central Europe, with important ecological and commercial value. Natural disturbances such as wind throws and bark beetle outbreaks have caused major losses in these forests in the last few decades and are becoming more frequent and severe. Holeksa et al. (2016) create...
Article
The Bohemian Forest lakes, situated along the Czech-German-Austrian border, were strongly affected by atmospheric acidification between the 1950s and the late 1980s. The subsequent chemical recovery of the lake water should precede and enable a biological recovery, including changes in caddisfly (Insecta: Trichoptera) assemblages. Nevertheless, loc...
Article
Full-text available
Highlighting the importance of paleoscience can be difficult. This article has been published after a workshop of young researchers during the PAGES Young Scientist Meeting. It is possible to advertise the importance of paleo research in solving present-day socio-economic problems, despite current challenges. This could be achieved by understanding...

Questions

Questions (2)
Question
I am studying a core from a peat bog and have samples of 500-1000 ml (spanning a few hundred years per sample). My main target is insect remains, for which I will treat the sample with parafffin oil to float all insects remains and floating bits up. But I also want to identify the botanical macro remains, so will take small subsamples for that before I treat with oil. How much would one recommend the subsample for botanical macro remains to be at least? 50 ml, 100 ml? More? Thank you for any suggestions.
Question
I am wanting to compare fossil insect densities with charcoal concentrations and other indexes for disturbance.
My issue is that insect samples were subsampled according to geochemical patterns in the soil and are of varying resilution (between 2 and 8 cm) and also temporal resolution (20 - 120 years). The core where the other indexes from disturbance were counted from is from the same site but was subsampled in 1-cm resolution. We have a hunch that bark beetles and charcoal densities are related, but how to test this statistically, is it even possible? To correlate these insect time slices of varying resolution, with the data points from the other core?
Example insect samples:
S1 0-4 cm 2017 - 2004
S2 4-6 cm 2004 - 1969
S3 6-8 cm 1969 - 1946
S4 8-11 cm 1946 - 1899
S5 11-15 cm 1899 -1841
S6 15-17 cm 1841 - 1806

Network

Cited By

Projects

Projects (4)
Project
Postdoctoral position part of BESTFORCE project (2020-2022) __________________________________________________________________ Projected climate change, with increasing disturbances and extensive human impact, place temperate montane forests (TMF) under pressure and it is uncertain how these ecosystems will respond to these changes. Palaeoecological data (e.g. sedimentary fossil pollen, charcoal, plant and insect remains) provide means to assess long-term change in TMF in relation to the changes in climate and disturbance regime. Due to the lack of knowledge on long-term (millennial) forest change at the continentality gradient, we propose to investigate TMF dynamics and its drivers in three distinct biogeographical regions in Central Eastern Europe. By using high resolution, interdisciplinary multiproxy approach we expect to detect different disturbance factors driving TMF change (including fire), and determine their long-term diversity change under different climate conditions and disturbance regimes. Our findings will have crucial role for understanding the future climate-driven vegetation change, which still lacks broader continentality scales from the past.
Project
This goal is determining my complete scientific work, as one of the long-term research goals. By recording changes in beetle species composition and diversity, on the background of changes in the landscape through time, we can better predict how beetle species composition and diversity will change in the near future. One upcoming study will compare two Holocene records from the Carpathian Mountains, of which one changed from mixed mountain forest to Norway spruce forest and the second one changed from spruce-dominated forest to beech-dominated forest.
Project
The Early-Career Network (ECN) of Past Environmental Global Changes (PAGES) aims to facilitate the exchange of ideas and skill sets in order to give early-career researchers the tools to excel in their research fields. The PAGES ECN will aid in the dissemination of information, establish vital scientific networks, and foster the development of ideas that can lead to future research collaborations and improved job prospects.