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Träfflista för sökning "WFRF:(Kreyling Jürgen) "

Search: WFRF:(Kreyling Jürgen)

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  • Gillert, Alexander, et al. (author)
  • Tracking growth and decay of plant roots in minirhizotron images
  • 2023
  • In: Proceedings - 2023 IEEE Winter Conference on Applications of Computer Vision, WACV 2023. - : Institute of Electrical and Electronics Engineers (IEEE). - 9781665493468 ; , s. 3688-3697
  • Conference paper (peer-reviewed)abstract
    • Plant roots are difficult to monitor and study since they are hidden belowground. Minirhizotrons offer an in-situ monitoring solution but their widespread adoption is still limited by the capabilities of automatic analysis methods. These capabilities so far consist only of estimating a single number (total root length) per image.We propose a method for a more fine-grained analysis which estimates the root turnover, i.e. the amount of root growth and decay between two minirhizotron images. It consists of a neural network that computes which roots are visible in both images and is trained in an unsupervised manner without additional annotations.Our code is available as a part of an analysis tool with a user interface ready to be used by ecologists.
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2.
  • Jurasinski, Gerald, et al. (author)
  • From Understanding to Sustainable Use of Peatlands : The WETSCAPES Approach
  • 2020
  • In: SOIL SYSTEMS. - : MDPI. - 2571-8789. ; 4:1
  • Journal article (peer-reviewed)abstract
    • Of all terrestrial ecosystems, peatlands store carbon most effectively in long-term scales of millennia. However, many peatlands have been drained for peat extraction or agricultural use. This converts peatlands from sinks to sources of carbon, causing approx. 5% of the anthropogenic greenhouse effect and additional negative effects on other ecosystem services. Rewetting peatlands can mitigate climate change and may be combined with management in the form of paludiculture. Rewetted peatlands, however, do not equal their pristine ancestors and their ecological functioning is not understood. This holds true especially for groundwater-fed fens. Their functioning results from manifold interactions and can only be understood following an integrative approach of many relevant fields of science, which we merge in the interdisciplinary project WETSCAPES. Here, we address interactions among water transport and chemistry, primary production, peat formation, matter transformation and transport, microbial community, and greenhouse gas exchange using state of the art methods. We record data on six study sites spread across three common fen types (Alder forest, percolation fen, and coastal fen), each in drained and rewetted states. First results revealed that indicators reflecting more long-term effects like vegetation and soil chemistry showed a stronger differentiation between drained and rewetted states than variables with a more immediate reaction to environmental change, like greenhouse gas (GHG) emissions. Variations in microbial community composition explained differences in soil chemical data as well as vegetation composition and GHG exchange. We show the importance of developing an integrative understanding of managed fen peatlands and their ecosystem functioning. 
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