Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2025
Forfattere
Maria Åsnes Moan Stefano Puliti Rasmus Astrup Ole Martin Bollandsås Terje Gobakken Maciej Wielgosz Hans Ole Ørka Lennart NoordermeerSammendrag
The site index (SI) describes a site’s potential to produce wood volume. Accurate information on SI in young forests is essential for planning thinning operations and projecting future growth and yield. For tree species that form annual branch whorls, information on interwhorl distances along the stem may be used to determine the SI in young forests. Branch whorls, and consequently tree height growth trajectories, can be detected automatically using deep learning on very dense laser scanning data. In the current study, we demonstrate this approach in a case study in a young Norway spruce forest. We trained a pose estimation Convolutional Neural Network and detected branch whorls of 97 dominant trees in 54 plots scanned with mobile laser scanning data. We predicted SI determined from detected branch whorls in three different sections of each tree, selected in the stem height range between 2.5 and 8 m: all whorls, the lowest six whorls, and whorls selected with an automatic selection procedure. We compared the obtained SI to the SI determined from field-measured branch whorls. Obtained values of precision, recall, and F1 score for the branch whorl detection were 0.66, 0.58, and 0.62, respectively. Values of root mean square error and mean differences between reference and predicted SI ranged between 19.8%–20.9% and −3.6%–4.0%, respectively. Although the tested approach showed potential for SI determination in young forests, the obtained errors were large. This was due to detection errors and high sensitivity to small changes in height increment. These issues highlight the need for further research to improve branch whorl detection accuracy and address challenges associated with determining the SI in young forests.
Forfattere
Jingwei Li Min-Rui Wang Zhibo Hamborg Dag-Ragnar Blystad Gayle Volk Jean Carlos Bettoni QiaoChun WangSammendrag
Rapid population growth poses a major challenge to global food security. Promoting sustainable agricultural production is necessary to ensure the global food security. Horticultural plants are a high-valued part in agricultural production. Virus and viroid diseases have long been a key factor limiting the horticultural production. Cultivation and distribution of pathogen-free plants is currently the most efficient practice for managing virus and viroid diseases, and their spread in the landscape. Cryotherapy-based methods are recently developed novel biotechnologies for the efficient production of pathogen-free plants. This review outlines updated information on the development and advances in cryotherapy-based methods for efficiently eradicating viruses and viroids in horticultural plants. Mechanisms underlining cryotherapy-based methods for improved pathogen eradication are discussed, and suggestions for further studies are proposed.
Forfattere
Jiunn Luh Tan Igor Koloniuk Ondřej Lenz Jana Veselá Jaroslava Přibylová Rostislav Zemek Josef Špak Radek Čmejla Jiří Sedlák Dag-Ragnar Blystad Zhibo Hamborg Jana FránováSammendrag
Although global raspberries production has grown in the past decade, it remains threatened by plant viruses. This study surveyed raspberry viruses and associated arthropods in the Czech Republic between 2021 and 2022 across five regions. A total of 257 plant and 151 arthropod samples were tested using RT-(q)PCR for 12 viruses listed in the EPPO Certification scheme, plus raspberry leaf blotch virus (RLBV) and a novel virus, tentatively named raspberry-associated virus A (RaVA). Raspberry bushy dwarf virus (RBDV) was most prevalent (51.8%), followed by black raspberry necrosis virus (BRNV, 42.0%) and raspberry leaf mottle virus (RLMV, 28.4%). Four viruses—arabis mosaic virus, apple mosaic virus, strawberry latent ringspot virus, raspberry ringspot virus—were not detected. RBDV was also identified in Sambucus nigra, a new host, while mixed RLBV and RaVA infection was found in wild Rubus occidentalis. RLBV was experimentally transmitted to Nicotiana occidentalis 37B in the presence of Phyllocoptes gracilis. Seven of 39 arthropod species carried viruses, but only two—Amphorophora rubi idaei and Aphis idaei—are known vectors. PCR amplicons from 92 isolates were sequenced, revealing high variability in several viruses. These findings offer new insights but highlight the need for continued monitoring and research.
Forfattere
Oskar PuschmannSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Marius Dobbe Klemetsen Marte Marie Fossum Ranvik Thomas Georges A Bawin Sigridur Dalmannsdottir Sangharsha Thapa El Houssaine Bouras Sylvain Poque Andrius Aleliūnas Rita Armoniene Egli Norkevičienė Kristiina Himanen Svante Resjö Qinlin Xiao Ameneh Khani Thomas G. Roitsch Erik Alexandersson Sajeevan R. SivarajanSammendrag
Det er ikke registrert sammendrag
Forfattere
Zuzana Vaneková Martina Redl Lorenz Fischer Karin Ortmayr Laura Jaakola Judith M. RollingerSammendrag
Vaccinium uliginosum (bog bilberry) is widely consumed in North America and Asia but has been historically avoided in many parts of Europe due to its alleged poisonous effects. We aimed to address this discrepancy in a systematic way with a combined phytochemical and ethnopharmacological approach, using UHPLC and UHPSFC for the chemical analysis, model organisms Caenorhabditis elegans and human liver cells GFP-Huh-7 for the bioactivity and toxicity testing, as well as fermentation experiments. Phytochemical analysis revealed minimal differences in the metabolite pattern between European and North American samples, with no evidence of toxic alkaloids or harmful secondary metabolites. Extracts exhibited no strongly toxic effects in the tested concentrations, neither in vitro (cell viability) nor in vivo (C. elegans). Berries infected by Monilinia megalospora showed altered flavonoid and anthocyanin contents but no increased toxicity. Notably, bog bilberries demonstrated a fermentation potential superior to Vaccinium myrtillus, resulting in an alcohol content of 4.8–5.8% ABV in unsweetened juices, thus potentially explaining historical accounts of inebriation. In conclusion, direct toxicity derived from these fruits is unlikely, but the alcohol content due to fruit fermentation is a plausible explanation for the folklore names (“drunk, inebriating berry”). However, additional factors such as human error, individual intolerance, or endophytic activity need to be considered.
Forfattere
Timothy Ohlert Melinda D. Smith Scott L. Collins Alan K. Knapp Jeffrey S. Dukes Osvaldo Sala Kate D. Wilkins Seth M. Munson Maggie I. Anderson Meghan L. Avolio Anping Chen Meghan T. Hayden Martin C. Holdrege Ingrid J. Slette Peter Wilfahrt Claus Beier Lauchlan H. Fraser Anke Jentsch Michael E. Loik Yiqi Luo Fernando T. Maestre Richard P. Phillips Sally A. Power Laura Yahdjian Qiang Yu Angel Chen Andrew J. Felton Laureano A. Gherardi Nicholas J. Lyon Hamed Abdoli Mehdi Abedi Juan Alberti Antonio I. Arroyo Heidi Asbjornsen Harald Auge Seton Bachle Michael Bahn David C. Bartholomew Amgaa Batbaatar Taryn L. Bauerle Karen H. Beard Kai Behn Ilka Beil Lucio Biancari Irmgard Blindow Viviana Florencia Bondaruk Elizabeth T. Borer Edward W. Bork Carlos Martin Bruschetti Kerry M. Byrne James F. Cahill Dianela A. Calvo Michele Carbognani Cameron N. Carlyle Karen Castillioni Miguel Castillo-Garcia Manjunatha H. Chandregowda Scott X. Chang Jeff Chieppa Amber C. Churchill Marcus Vinicius Cianciaruso Amanda L Cordeiro Sara A. O. Cousins Daniela F. Cusack Sven Dahlke Pedro Daleo Lee H. Dietterich Maren Dubbert Nico Eisenhauer T’ai G. W. Forte Flavia A. Funk Darcy Galiano Aaron C. Greenville Liebao Han Siri Vatsø Haugum Yann Hautier Andy Hector Hugh A. L. Henry Daniela Hoss Forest Isbell Samuel E. Jordan Yuguang Ke Eugene F. Kelly Sally E. Koerner Juergen Kreyling György Kröel-Dulay Alicia I. Kröpfl Angelika Kübert Andrew Kulmatiski Eric G. Lamb Klaus Steenberg Larsen Steven Lee Smriti Pehim Limbu Anja Linstädter Shirong Liu Grisel Longo Alejandro Loydi Junwei Luan F. Curtis Lubbe Andrey V. Malyshev Cameron D. McIntire Daniel B. Metcalfe Malesela Vincent Mokoka Akira S. Mori Edwin Mudongo Gregory S. Newman Uffe N. Nielsen Raúl Ochoa-Hueso Rory C. O’Connor Romà Ogaya Gastón R. Oñatibia Ildikó Orbán Brooke B. Osborne Rafael Otfinowski Meelis Pärtel Jesús Pascual Josep Peñuelas Pablo L. Peri David S. Pescador Guadalupe Peter Alessandro Petraglia Catherine Picon-Cochard Valério D. Pillar Juan M. Piñeiro-Guerra Laura Weber Ploughe Robert M. Plowes Cristy Portales-Reyes Suzanne M. Prober Yolanda Pueyo Golsa Rahmati Sasha C. Reed Dana Aylén Rodríguez William E. Rogers Christiane Roscher David W. Rowley Ana M. Sánchez Bráulio A. Santos Michael P. Schellenberg Michael Scherer-Lorenzen Eric W. Seabloom Ruonan Shen Baoku Shi Lara Souza Andreas Stampfli Rachel J. Standish Marcelo Sternberg Wei Sun Marie Sünnemann Michelle Tedder Tyson J. Terry Pål Thorvaldsen Katja Tielbörger Maud Tissink Matthew A. Vadeboncoeur Alejandro Valdecantos Liesbeth van den Brink Vigdis Vandvik Liv Guri Velle Svenja Wanke Glenda M. Wardle Cunzheng Wei Christiane Werner Georg Wiehl Jennifer L. Williams Amelia A. Wolf Honghui Wu Chong Xu Xuechen Yang Yadong Yang Jenifer L. Yost Alyssa L. Young Ping Yue Juan M. Zeberio Michaela Zeiter Haiyang Zhang Juntao Zhu Xiaoan ZuoSammendrag
As droughts become longer and more intense, impacts on terrestrial primary productivity are expected to increase progressively. Yet, some ecosystems appear to acclimate to multiyear drought, with constant or diminishing reductions in productivity as drought duration increases. We quantified the combined effects of drought duration and intensity on aboveground productivity in 74 grasslands and shrublands distributed globally. Ecosystem acclimation with multiyear drought was observed overall, except when droughts were extreme (i.e., ≤1-in-100-year likelihood of occurrence). Productivity losses after four consecutive years of extreme drought increased by ~2.5-fold compared with those of the first year. These results portend a foundational shift in ecosystem behavior if drought duration and intensity increase, from maintenance of reduced functioning over time to progressive and profound losses of productivity when droughts are extreme.
Sammendrag
The value of genetic resources in agriculture is hard to overestimate as they are decisive for food safety, provide options for adaptation of future diet needs, and underpin a vast amount of biodiversity. To enable an effective conservation of these resources, we need knowledge about where they are located. The EU project GenRes Bridge showed that this knowledge is indeed modest at the European level. A source of genetic resources with particular potential for use in agriculture, e.g. related to the future adaptation to climate change, are crop wild relatives (CWR). Crop wild relatives are plant species categorized as wild relatives of cultivated plants and are used here as an indicator of genetic resources in the landscape. We therefore wanted to explore new ways of identifying hotspots of genetic resources, highlighting the landscape as a starting point. It is well established that landscape heterogeneity is closely related to biodiversity, although to our knowledge studies hitherto have rarely looked at the relation between landscape and genetic resources. Focusing on crop wild relatives, used here as an indicator for genetic resources in the landscape, we wanted to assess whether we could identify how landscape variation in topography and land cover has consequences for the spatial distribution of genetic resources that may be important in the future development of agriculture. Here we report the results from this pilot study where we have tested whether there is a correlation between landscape heterogeneity and agricultural genetic resources, using 5 x 5 km grid cells as spatial units. We used the presence of the crop wild relatives (CWR) which are prioritized for conservation in Norway as indicators of agricultural genetic resource diversity and extracted landscape heterogeneity descriptors from publicly available sources. The results from our study do suggest that landscape diversity could be a path worth following in searching for these resources in the landscape, and thus also important in decision-making on planning and management in these diverse landscapes.
Sammendrag
Kulturlandskapet vårt har blitt til gjennom folka sitt nærvær gjennom fleire tusen år. Skal dette landskapet takast vare på, er vi avhengige av at bruken held fram. Sjå for deg eit Norge der dyra ikkje lenger beiter i utmarka fordi det er billigare å importere fôr. Landskapet vil gro att, og einsarta kratt vil overta der det ein gong var artsrike beiter. Sjå for deg eit gjengrodd Norge der hytta på fjellet ikkje har utsikt lenger fordi bjørka veks opp til takmønet. Kanskje har vi allereie nådd dette punktet? Korleis hindre at det kulturavhengige artsmangfaldet går tapt i effektiviseringas og mekaniseringas tidsaldar? Avhengigheita er gjensidig. Det var artsmangfaldet som gjorde det mogleg for oss å overleve i dette landet. Det kan også vere nøkkelen til ei berekraftig framtid.