First automatic size measurements for the separation of dwarf birch and tree birch pollen in MIS 6 to MIS 1 records from Northern Germany

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • Martin Theuerkauf
  • Elias Nehring
  • Alexander Gillert
  • Philipp Morten Bodien
  • Michael Hein
  • Brigitte Urban

During past glacial periods, the land cover of Northern Eurasia and North America repeatedly shifted between open steppe tundra and boreal/temperate forest. Tracking these changes and estimating the coverage of open versus forested vegetation in past glacial and interglacial landscapes is notoriously difficult because the characteristic dwarf birches of the tundra and the tree birches of the boreal and temperate forests produce similar pollen grains that are difficult to distinguish in the pollen record. One objective approach to separating dwarf birch pollen from tree birch pollen is to use grain size statistics. However, the required grain size measurements are time-consuming and, therefore, rarely produced. Here, we present an approach to automatic size measurement based on image recognition with convolutional neural networks and machine learning. It includes three main steps. First, the TOFSI algorithm is applied to detect and classify pollen, including birch pollen, in lake sediment samples. Second, a Resnet-18 neural network is applied to select the birch pollen suitable for measurement. Third, semantic segmentation is applied to detect the outline and the area and mean width of each detected birch pollen grain. Test applications with two pollen records from Northern Germany, one covering the Lateglacial-Early Holocene transition and the other covering the Mid to Late Pleistocene transition, show that the new technical approach is well suited to measure the area and mean width of birch pollen rapidly (>1000 per hour) and with high accuracy. Our new network-based tool facilitates more regular size measurements of birch pollen. Expanded analysis of modern birch pollen will help to better understand size variations in birch pollen between birch species and in response to environmental factors as well as differential sample preparation. Analysis of fossil samples will allow better quantification of dwarf birch versus tree birch in past environments.

OriginalspracheEnglisch
Aufsatznummere11510
ZeitschriftEcology and Evolution
Jahrgang14
Ausgabenummer6
Anzahl der Seiten17
ISSN2045-7758
DOIs
PublikationsstatusErschienen - 01.06.2024

Bibliographische Notiz

Publisher Copyright:
© 2024 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

DOI

Zuletzt angesehen

Aktivitäten

  1. Preserving a respectable self – victim narratives in face of institutional programs and closed awareness contexts of the private environment
  2. Hochschulöffentlicher Vortrag: Citizenship Education in South Africa and Germany - Einblicke in ein aktuelles binationales Forschungsprojekt
  3. Fundamentalethische Probleme des Personbegriffs und die Beispiele der sog. "After Birth Abortion" und der Forschung an embryonalen Stammzellen
  4. "Hannah Arendts 'Wahrheit und Politik' - eine fachdidaktische Lektüre vor dem Hintergrund des aufziehenden Zeitalters der 'postfaktischen Politik'
  5. Unternehmensstrategische Ebene der ESG-Berichterstattung: Implikationen für Geschäftsmodelle, Interne Kontrollsysteme und Risikomanagementsysteme
  6. Identification of photo-transformation products of ciprofloxacin and evaluation of their genotoxicity using in silco methods and in vitro assay
  7. Nach der Pandemie ist vor der Krise. Zur Förderung von Unsicherheitskompetenz mittels bedürfnisorientierter transformativer Ansätze in der BNE
  8. Die Rolle von Unterrichtsmaterialien aus dem Internet und OER (open educational ressources) im Kontext einer Bildung für nachhaltige Entwicklung
  9. Zur Bedeutung epistemischer, sozialer und organisationaler Integration für die institutionenübergreifende Entwicklungsteamarbeit im ZZL-Netzwerk
  10. Environmental fate of S-metolachlor in its pure form and as a part of commercial product - Mercantor Gold®: biodegradation and sorption onto sediment
  11. Strategies in Communicating the Change Vision: How Power Distance-Orientation Maderates Recipients'Reactions towards Change Communication Strategies
  12. Demokratiebildung als didaktische Querschnittsaufgabe an Berufsschulen – Perspektiven einer curricularen (Weiter-) Entwicklung des Lernfeldunterrichts
  13. Modelling the fate and export of pesticides and their transformation products at catchment scale.: Vortrag auf Einladung des Projekts "EMPOWER Tunisia"
  14. Digitale Unterstützung des Schreibens im sprachlich heterogenen Deutschunterricht - Eine DBR-Studie an berufsbildenden Schulen in Hamburg & Niedersachsen
  15. Effects of an Internet-based guided self-help intervention for college women with eating disorders: Long-term results from a large randomized controlled trial.
  16. Personal norms of sustainability and their consequences in ecological-economic systems under uncertainty – The case of rangeland management in semi-arid regions
  17. Implementing an Internet-based platform for eating disorder screening, prevention, and treatment on college campuses: Preliminary results from a state-wide initiative.
  18. Prima Conferencia Internacional “Alternativas de desarrollo sostenible: cómo cambiar el paradigma social con énfasis en la centralidad del ser humano y la naturaleza” 2012
  19. Institutionenübergreifende Kooperationen in der Lehrkräftebildung: Konzeptionelle Ansätze, Zugänge zur Begleitforschung sowie Befunde zu Potenzialen und Herausforderungen

Publikationen

  1. Analytical prediction of wall thickness reduction and forming forces during the radial indentation process in Incremental Profile Forming
  2. Die Krise in der Krise. Sozial-ökologische Perspektiven auf Zuschreibungen, Bestätigungen und Verluste des ‚Reproduktiven’ in Zeiten von ‚Corona’
  3. Investigation of the friction behavior between dry/infiltrated glass fiber fabric and metal sheet during deep drawing of fiber metal laminates
  4. Experimental investigation of the fluid-structure interaction during deep drawing of fiber metal laminates in the in-situ hybridization process
  5. Exploring the potential of SMEs to build individual, organizational, and community resilience through sustainability-oriented business practices
  6. Nitrogen but not phosphorus addition affects symbiotic N2 fixation by legumes in natural and semi-natural grasslands located on four continents
  7. Nachhaltige Raumentwicklung für die große Transformation – Herausforderungen, Barrieren und Perspektiven für Raumwissenschaften und Raumplanung
  8. Determinants and consequences of corporate social responsibility decoupling—Status quo and limitations of recent empirical quantitative research
  9. Model Predictive Control for Energy Optimization in Generators/Motors as Well as Converters and Inverters for Futuristic Integrated Power Networks
  10. Montesano Montessori, Nicolina, Michael Farrelly, und Jane Mulderrig (eds.) (2019): Critical Policy Discourse Analysis. Advances in Critical Policy Studies
  11. Correction to Neighbourhood stories: role of neighbour identity, spatial location and order of arrival in legume and non-legume initial interactions
  12. What enables metals ‘being’ ‘responsible’? An exploratory study on the enabling of organizational identity claims through a new sustainability standard
  13. Gendered Energy – Analytische Perspektiven und Potenziale der Geschlechterforschung für eine sozial-ökologische Gestaltung der Energiewende im Raum
  14. A framework for drivers fostering social-ecological restoration within forest landscape based on people’s participation. A systematic literature review
  15. Spatial interpretation of high-resolution environmental proxy data of the Middle Pleistocene Palaeolithic faunal kill site Schöningen 13 II-4, Germany
  16. Climate reporting quality following the recommendations of the task force on climate-related financial disclosures: A Focus on the German capital market
  17. Initial hazard screening for genotoxicity of photo-transformation products of ciprofloxacin by applying a combination of experimental and in-silico testing
  18. Spring barley performance benefits from simultaneous shallow straw incorporation and top dressing as revealed by rhizotrons with resealable sampling ports
  19. Efficacy and cost-effectiveness of guided and unguided internet- and mobile-based indicated transdiagnostic prevention of depression and anxiety (ICare Prevent)
  20. Comparative effectiveness of three versions of a stepped care model for insomnia differing in the amount of therapist support in internet-delivered treatment
  21. The role of organized publics in articulating the exnovation of fossil-fuel technologies for intra- and intergenerational energy justice in energy transitions
  22. „Es ist eher so, dass wir miteinander konkurrieren“: Außerschulische Bildungsprojekte für ‚Geflüchtete‘ im Kontext von ‚EU-Türkei-Deal‘ und New Educational Governance
  23. A literature review concerning the non-carbon-related environmental goals of the EU Taxonomy Regulation and the European Sustainability Reporting Standards (ESRS)
  24. Assessing the environmental fate of S-metolachlor, its commercial product Mercantor Gold® and their photoproducts using a water-sediment test and in silico methods
  25. Naturschutzfachliche und naturschutzrechtliche Anforderungen im Gefolge der Ausdehnung des Raumordnungsregimes auf die deutsche ausschließliche Wirtschaftszone