Browsing Bergen Open Research Archive by Author "Töpper, Joachim Paul"

Now showing items 1-14 of 14

    • Are sub-alpine species' seedling emergence and establishment in the alpine limited by climate or biotic interactions? 

      Dahle, Ingrid Johnsen; Gya, Ragnhild; Töpper, Joachim Paul; Vandvik, Vigdis (Journal article; Peer reviewed, 2024)
      One of the ways in which plants are responding to climate change is by shifting their ranges to higher elevations. Early life- history stages are major bottlenecks for species' range shifts, and variation in seedling ...

    • At what cost? The impact of bacteriophage resistance on the growth kinetics and protein synthesis of Escherichia coli 

      Landor, Lotta Anni Ingeborg; Tjendra, Jesslyn; Erstad, Karen; Krabberød, Anders Kristian; Töpper, Joachim Paul; Våge, Selina (Journal article; Peer reviewed, 2024)
      Cost of bacteriophage resistance (COR) is important in explaining processes of diversification and coexistence in microbial communities. COR can be expressed in different traits, and the lack of universally applicable ...

    • Colonization and extinction lags drive non-linear responses to warming in mountain plant communities across the Northern Hemisphere 

      Bektaş, Billur; Chisholm, Chelsea; Egelkraut, Dagmar Dorothea; Lynn, Joshua; Block, Sebastián; Deola, Thomas; Dommanget, Fanny; Enquist, Brian J.; Goldberg, Deborah E.; Haider, Sylvia; Halbritter, Aud Helen; He, Yongtao; Jaunatre, Renaud; Jentsch, Anke; Klanderud, Kari; Kardol, Paul; Lachmuth, Susanne; Loucougaray, Gregory; Münkemüller, Tamara; Niedrist, Georg; Nomoto, Hanna; Seltzer, Lorah; Töpper, Joachim Paul; Rew, Lisa J.; Seipel, Tim; Shah, Manzoor A.; Telford, Richard James; Walker, Tom W.N.; Wang, Shiping; Wardle, David A.; Wolff, Peter; Yang, Yan; Vandvik, Vigdis; Alexander, Jake M. (Journal article; Peer reviewed, 2024)
      Global warming is changing plant communities due to the arrival of new species from warmer regions and declining abundance of cold-adapted species. However, experimentally testing predictions about trajectories and rates ...

    • Environmental drivers of increased ecosystem respiration in a warming tundra 

      Maes, S.L.; Dietrich, J.; Midolo, G.; Schwieger, S.; Kummu, M.; Vandvik, Vigdis; Aerts, R.; Althuizen, Inge; Biasi, C.; Björk, R.G.; Böhner, Hanna; Carbognani, M.; Chiari, G.; Christiansen, Casper Tai; Clemmensen, K.E.; Cooper, Elisabeth J.; Cornelissen, J.H.C.; Elberling, Bo; Faubert, P.; Fetcher, N.; Forte, T.G.W.; Gaudard, Joseph; Gavazov, K.; Guan, Z.; Guðmundsson, J.; Gya, Ragnhild; Hallin, S.; Hansen, Brage Bremset; Haugum, Siri Vatsø; He, J.-S.; Hicks Pries, Pries; Hovenden, M.J.; Jalava, M.; Jónsdóttir, I.S.; Juhanson, J.; Jung, J.Y.; Kaarlejärvi, E.; Kwon, M.J.; Lamprecht, R.E.; Le Moullec, Mathilde; Lee, Hanna; Marushchak, M.E.; Michelsen, A; Munir, T.M.; Myrsky, E.M.; Nielsen, C.S.; Nyberg, M.; Olofsson, J.; Óskarsson, H.; Parker, T.C.; Pedersen, E.P.; Petit Bon, Matteo; Petraglia, A.; Raundrup, K.; Ravn, N.M.R.; Rinnan, R.; Rodenhizer, H.; Ryde, I.; Schmidt, N.M.; Schuur, E.A.G.; Sjögersten, S.; Stark, S.; Strack, M.; Tang, J.; Tolvanen, A.; Töpper, Joachim Paul; Väisänen, M.K.; van Logtestijn, Logtestijn; Voigt, C.; Walz, J.; Weedon, J.T.; Yang, Y.; Ylänne, H.; Björkman, Mats Peter; Sarneel, J.M.; Dorrepaal, E. (Journal article; Peer reviewed, 2024)
      Arctic and alpine tundra ecosystems are large reservoirs of organic carbon1,2. Climate warming may stimulate ecosystem respiration and release carbon into the atmosphere3,4. The magnitude and persistency of this stimulation ...

    • The handbook for standardized field and laboratory measurements in terrestrial climate change experiments and observational studies (ClimEx) 

      Halbritter Rechsteiner, Aud Helen; De Boeck, Hans J.; Eycott, Amy Elizabeth; Reinsch, Sabine; Robinson, David A.; Vicca, Sara; Berauer, Bernd; Christiansen, Casper Tai; Estiarte, Marc; Grünzweig, José M.; Gya, Ragnhild; Hansen, Karin; Jentsch, Anke; Lee, Hanna; Linder, Sune; Marshall, John; Peñuelas, Josep; Schmidt, Inger Kappel; Stuart-Haëntjens, Ellen; Wilfahrt, Peter; Vandvik, Vigdis; Abrantes, Nelson; Almagro, María; Althuizen, Inge; Barrio, Isabel C.; te Beest, Mariska; Beier, Claus; Beil, Iilka; Berry, Z. Carter; Birkemoe, Tone; Bjerke, Jarle W.; Blonder, Benjamin; Blume-Werry, Gesche; Bohrer, Gil; Campos, Isabel; Cernusak, Lucas S.; Chojnicki, Bogdan H.; Cosby, Bernhard J.; Dickman, Lee T.; Djukic, Ika; Filella, Iolanda; Fuchslueger, Lucia; Gargallo-Garriga, Albert; Gillespie, Mark Andrew; Goldsmith, Gregory R.; Gough, Christopher; Halliday, Fletcher W.; Hegland, Stein Joar; Hoch, Gunter; Holub, Petr; Jaroszynska, Francesca Orinda Holl; Johnson, Daniel M.; Jones, Scott B.; Kardol, Paul; Keizer, Jan J.; Klem, Karel; Konestabo, Heidi Sjursen; Kreyling, Jürgen; Kröel-Dulay, György; Landhäusser, Simon M.; Larsen, Klaus S.; Leblans, Niki; Lebron, Inma; Lehmann, Marco M.; Lembrechts, Jonas J.; Lenz, Armando; Linstädter, Anja; Llusià, Joan; Macias-Fauria, Marc; Malyshev, Andrey V.; Mänd, Pille; Marshall, Miles; Matheny, Ashley M.; McDowell, Nate; Meier, Ina C.; Meinzer, Frederick C.; Michaletz, Sean T.; Miller, Megan L.; Muffler, Lena; Oravec, Michal; Ostonen, Ivika; Porcar-Castell, Albert; Preece, Catherine; Prentice, Iain C.; Radujković, Dajana; Ravolainen, Virve; Ribbons, Relena; Ruppert, Jan C.; Sack, Lawren; Sardans, Jordi; Schindlbacher, Andreas; Scoffoni, Christine; Sigurdsson, Bjarni D.; Smart, Simon M; Smith, Stuart; Soper, Fiona; Speed, James David Mervyn; Sverdrup-Thygeson, Anne; Sydenham, Markus A. K.; Taghizadeh-Toosi, Arezoo; Telford, Richard J.; Tielborger, Katja; Töpper, Joachim Paul; Urban, Otmar; van der Ploeg, Martine; Van Langenhove, Leandro; Večeřová, Kristýna; Ven, Arne; Verbruggen, Erik; Vik, Unni; Weigel, Robert; Wohlgemuth, Thomas; Wood, Lauren K.; Zinnert, Julie; Zurba, Kamal (Peer reviewed; Journal article, 2019-11-05)
      1. Climate change is a world‐wide threat to biodiversity and ecosystem structure, functioning and services. To understand the underlying drivers and mechanisms, and to predict the consequences for nature and people, we ...

    • Introducing the index-based ecological condition assessment framework (IBECA) 

      Jakobsson, Simon; Evju, Marianne; Framstad, Erik; Imbert, Alexis; Lyngstad, Anders; Sickel, Hanne; Sverdrup-Thygeson, Anne; Töpper, Joachim Paul; Vandvik, Vigdis; Velle, Liv Guri; Aarrestad, Per Arild; Nybø, Signe (Journal article; Peer reviewed, 2021)
      Sustainable nature management and ecosystem conservation depends critically on scientifically sound and stakeholder-relevant analytical frameworks for monitoring and assessing ecological condition. Several general frameworks ...

    • Management-driven evolution in a domesticated ecosystem 

      Vandvik, Vigdis; Töpper, Joachim Paul; Cook, Zoë; Daws, Matthew I.; Heegaard, Einar; Måren, Inger Elisabeth; Velle, Liv Guri (Peer reviewed; Journal article, 2014-02-12)
      Millennia of human land-use have resulted in the widespread occurrence of what have been coined ‘domesticated ecosystems’. The anthropogenic imprints on diversity, composition, structure and functioning of such systems are ...

    • Plastic Population Effects and Conservative Leaf Traits in a Reciprocal Transplant Experiment Simulating Climate Warming in the Himalayas 

      Cui, Haijun; Töpper, Joachim Paul; Yang, Yan; Vandvik, Vigdis; Wang, Genxu (Peer reviewed; Journal article, 2018-07-30)
      Climate warming poses considerable challenges for alpine plant species, especially for competitively inferior ones with resource-conservative adaptations to cold climates. The Himalayas are warming at rates considerably ...

    • Predicting and assessing climate-change impacts on the population dynamics of alpine and lowland forbs 

      Töpper, Joachim Paul (Doctoral thesis, 2015-05-29)
      Background and aims: Global climate change is already affecting plant species worldwide. The global rise in temperatures and regional changes in precipitation are predicted to continue throughout the century. Therefore, ...

    • Removal of large viruses and their dispersal through fecal pellets of the appendicularian Oikopleura dioica during Emiliania huxleyi bloom conditions 

      Mayers, Kyle; Lawrence, Janice; Skaar, Katrine Sandnes; Töpper, Joachim Paul; Petelenz-Kurdziel, Elzbieta Anna; Saltvedt, Marius Rydningen; Sandaa, Ruth-Anne; Larsen, Aud; Bratbak, Gunnar; Ray, Jessica Louise (Journal article; Peer reviewed, 2021)
      Despite their importance in shaping the structure and function of marine microbial food webs, little is known about factors regulating marine virus abundance. Previous work demonstrated clearance of laboratory-cultured ...

    • The Response of Heterotrophic Prokaryote and Viral Communities to Labile Organic Carbon Inputs Is Controlled by the Predator Food Chain Structure 

      Sandaa, Ruth-Anne; Pree, Bernadette; Larsen, Aud; Våge, Selina; Tøpper, Birte; Töpper, Joachim Paul; Thyrhaug, Runar; Thingstad, Tron Frede (Peer reviewed; Journal article, 2017-08-23)
      Factors controlling the community composition of marine heterotrophic prokaryotes include organic-C, mineral nutrients, predation, and viral lysis. Two mesocosm experiments, performed at an Arctic location and bottom-up ...

    • Seed banks are biodiversity reservoirs: species–area relationships above versus below ground 

      Vandvik, Vigdis; Klanderud, Kari; Meineri, Eric Pierre F; Måren, Inger Elisabeth; Töpper, Joachim Paul (Peer reviewed; Journal article, 2015-05-26)
      Soil seed banks offer plants the possibility to disperse through time. This has implications for population and community dynamics, as recognised by ecological and evolutionary theory. In contrast, the conservation and ...

    • Setting reference levels and limits for good ecological condition in terrestrial ecosystems – Insights from a case study based on the IBECA approach 

      Jakobsson, Simon; Töpper, Joachim Paul; Evju, Marianne; Framstad, Erik; Lyngstad, Anders; Pedersen, Bård; Sickel, Hanne; Sverdrup-Thygeson, Anne; Vandvik, Vigdis; Velle, Liv Guri; Aarrestad, Per Arild; Nybø, Signe (Journal article; Peer reviewed, 2020-09)
      Effective evidence-based nature conservation and habitat management relies on developing and refining our methodological toolbox for detecting critical ecological changes at an early stage. This requires not only optimizing ...

    • A test of local adaptation to drought in germination and seedling traits in populations of two alpine forbs across a 2000 mm/year precipitation gradient 

      Gya, Ragnhild; Geange, Sonya Rita; Lynn, Joshua; Töpper, Joachim Paul; Wallevik, Øystein; Zernichow, Camilla; Vandvik, Vigdis (Journal article; Peer reviewed, 2023)
      Seed regeneration is a critical stage in the life histories of plants, affecting species' abilities to maintain local populations, evolve, and disperse to new sites. In this study, we test for local adaptations to drought ...