Diatoms of North AmericaContinuing in fall of 2023...
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Sessions are recorded and can be accessed for later viewing. You are invited to join us, wherever you may be, from anywhere around the world. Our zoom link:
https://umn.zoom.us/j/98329532220?pwd=K2RCMkd0Vk9JbWl3MFlyazcyaHdEZz09
UPCOMING
Tuesday October 10
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
John Smol, Paleoecological Environmental Assessment and Research Lab, Queen's University
From tundra ponds to the “Northern Great Lakes”: Climate-driven regime shifts in Arctic ecosystems
Description: Our lab has been working across the circum-polar Arctic for four decades, with a primary focus on the limnology and paleolimnology of these often poorly described waterbodies. Diatoms have been the primary indicators of ecosystem change. As reviewed in Chapter 4 of my recent book (Smol, 2023), our early research focused on small ponds. Beginning with our first paleolimnological study that demonstrated this comparative approach in the High Arctic (Douglas et al., 1994, Science) to our continuing work, we argue that recent ecological shifts are unprecedented, at least over the Holocene, and that climate warming is the primary driver of these changes. Whilst a considerable amount of paleolimnological data have now been gathered from small and mid-sized lakes, little comparable data are available on even the basic limnological conditions of the “Northern Great Lakes”. In this talk, I will compare diatom changes, over the last ~200 years, for Lake Hazen (Lehnherr et al. 2018, Nature Comm., Michelutti et al. 2020, Proc. Roy. Soc. Lond.), Great Slave Lake (Rühland et al. 2023, Proc. Roy. Soc. Lond.), and Great Bear Lake (Rühland et al. unpublished) and compare these to changes observed in nearby medium and small-sized lakes. A clear continuum of predictable changes shows that climate thresholds (e.g. ice cover loss, thermal stratification) have recently been surpassed. These changes will undoubtedly cascade throughout the ecosystem affecting food web changes important to local Indigenous populations and to the global community.
Smol, J.P. 2023. Lakes in the Anthropocene: Reflections on tracking ecosystem change in the Arctic. Excellence in Ecology Book Series, International Ecology Institute (ECI), Oldendorf/Luhe, Germany. 13 chapters. 438 pp. 50 Euros plus postage.
Tuesday October 24
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Nathan Smucker, Environmental Protection Agency, Office of Research and Development
DNA metabarcoding for aquatic assessment
Tuesday November 7
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Euan Reavie, Natural Resources Research Institute (NRRI), University of Minnesota Duluth
Something great about the Great Lakes
Tuesday November 21
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Sunlin Hu
Improved techniques for SEM analysis of diatoms
Tuesday December 5
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Somayyeh Kheiri, Curator of Diatom Herbarium, Research Institute of Forests and Rangelands
The Lut Desert of Iran and its diatoms
Tuesday December 19
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
TENTATIVE: Rosa Trobajo, IRTA, Sant Carles de la Ràpita
Una presentación sobre diatomeas (en español)
Winter Break
Tuesday February 13, 2024
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Rosalina Stancheva Christova, George Mason University
Cocconeis and its mysteries
Tuesday February 27, 2024
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Luke Brokensha, Institute for Marine and Antarctic Studies, University of Tasmania
Long-term records of Southern Ocean diatoms
Tuesday March 12, 2024
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Viviana Mazzei, US Geological Survey
Algal dynamics of Lake Okochobee, Florida
Tuesday April 9, 2024
10 - 11 AM (mountain time, US and Canada)
18:00 Central European Time
Kait Reinl, Lake Superior National Estuarine Research Reserve
TBA
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ARCHIVE
Ruchi Battacharya, University of Waterloo
Big data in limnology
Veronica Hamilton, Ball State University
Voucher diatom flora from fens in the Tanana River floodplain, Alaska
Rosa Trabajo, President, International Society for Diatom Research
Early Career Research Grants
Sarah Spaulding, INSTAAR, University of Colorado
A peek at the diatoms.org upgrade
Jasmine Saros, University of Maine
Deciphering climate-lake linkages by coupling diatom ecology with lake sediment records
Karolina Bryłka, Lund University
Uncertainties surrounding the oldest fossil record of diatoms
Regine Jahn, Botanischer Garten und Botanisches Museum Berlin-Dahlem
How to name diatoms from taxonomic studies - integrating type information, morphology, and sequence data
Daniel Conley, Lund University
Perspectives on the emergence of diatoms and their impact on the global biogeochemical cycle of silica
Sylvia Lee, US Environmental Protection Agency
Diatom Certification Level 2 Species Exam
David Harwood, University of Nebraska
The great grandmother diatoms
Marco Cantonati, University of Bologna, Italy
Spring habitats as living repositories of biodiversity
Bart van de Vijver, Meise Botanic Garden & University of Antwerp, Belgium
The detective in the museum
