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.
2022
Abstract
Plants and fungi emit volatile organic compounds (VOCs) that are either constitutively produced or are produced in response to changes in their physico-chemical status. We hypothesized that these chemical signals could be utilized as diagnostic tools for plant diseases. VOCs from several common wheat pathogens in pure culture (Fusarium graminearum, Fusarium culmorum, Fusarium avenaceum, Fusarium poae, and Parastagonospora nodorum) were collected and compared among isolates of the same fungus, between pathogens from different species, and between pathogens causing different disease groups [Fusarium head blight (FHB) and Septoria nodorum blotch (SNB)]. In addition, we inoculated two wheat varieties with either F. graminearum or P. nodorum, while one variety was also inoculated with Blumeria graminis f.sp. tritici (powdery mildew, PM). VOCs were collected 7, 14, and 21 days after inoculation. Each fungal species in pure culture emitted a different VOC blend, and each isolate could be classified into its respective disease group based on VOCs with an accuracy of 71.4 and 84.2% for FHB and SNB, respectively. When all collection times were combined, the classification of the tested diseases was correct in 84 and 86% of all cases evaluated. Germacrene D and sativene, which were associated with FHB infection, and mellein and heptadecanone, which were associated with SNB infection, were consistently emitted by both wheat varieties. Wheat plants infected with PM emitted significant amounts of 1-octen-3-ol and 3,5,5-trimethyl-2-hexene. Our study suggests that VOC blends could be used to classify wheat diseases. This is the first step toward a real-time disease detection in the field based on chemical signatures of wheat diseases.
Authors
Haley Kujawa Margaret Kalcic Jay Martin Anna Apostel Jeffrey Kast Asmita Murumkar Grey Evenson Noel Aloysius Richard Becker Chelsie Boles Remegio Confesor Awoke Dagnew Tian Guo Rebecca Logsdon Muenich Todd Redder Yu-Chen Wang Donald ScaviaAbstract
This study investigates the combined impacts of climate change and agricultural conservation on the magnitude and uncertainty of nutrient loadings in the Maumee River Watershed, the second-largest watershed of the Laurentian Great Lakes. Two scenarios — baseline agricultural management and increased agricultural conservation — were assessed using an ensemble of five Soil and Water Assessment Tools driven by six climate models. The increased conservation scenario included raising conservation adoption rates from a baseline of existing conservation practices to feasible rates in the near future based on farmer surveys. This increased adoption of winter cover crops on 6%–10% to 60% of cultivated cropland; subsurface placement of phosphorus fertilizers on 35%–60% to 68% of cultivated cropland; and buffer strips intercepting runoff from 29%–34% to 50% of cultivated cropland. Increased conservation resulted in statistically significant (p ≤ 0.05) reductions in annual loads of total phosphorus (41%), dissolved reactive phosphorus (18%), and total nitrogen (14%) under the highest emission climate scenario (RCP 8.5). While nutrient loads decreased with increased conservation relative to baseline management for all watershed models, different conclusions on the true effectiveness of conservation under climate change may be drawn if only one watershed model was used.
Authors
Pavel Raška Nejc Bezak Carla S.S. Ferreira Zahra Kalantari Kazimierz Banasik Miriam Bertola Mary Bourke Artemi Cerdà Peter Davids Mariana Madruga de Brito Rhys Evans David C. Finger Rares Halbac-Cotoara-Zamfir Mashor Housh Artan Hysa Jiří Jakubínský Marijana Kapović Solomun Maria Kaufmann Saskia Keesstra Emine Keles Silvia Kohnová Michele Pezzagno Kristina Potočki Samuel Rufat Samaneh Seifollahi-Aghmiuni Arthur Schindelegger Mojca Šraj Gintautas Stankunavicius Jannes Stolte Ružica Stričević Jan Szolgay Vesna Zupanc Lenka Slavikova Thomas HartmannAbstract
The major event that hit Europe in summer 2021 reminds society that floods are recurrent and among the costliest and deadliest natural hazards. The long-term flood risk management (FRM) efforts preferring sole technical measures to prevent and mitigate floods have shown to be not sufficiently effective and sensitive to the environment. Nature-Based Solutions (NBS) mark a recent paradigm shift of FRM towards solutions that use nature-derived features, processes and management options to improve water retention and mitigate floods. Yet, the empirical evidence on the effects of NBS across various settings remains fragmented and their implementation faces a series of institutional barriers. In this paper, we adopt a community expert perspective drawing upon LAND4FLOOD Natural flood retention on private land network (https://www.land4flood.eu) in order to identify a set of barriers and their cascading and compound interactions relevant to individual NBS. The experts identified a comprehensive set of 17 barriers affecting the implementation of 12 groups of NBS in both urban and rural settings in five European regional environmental domains (i.e., Boreal, Atlantic, Continental, Alpine-Carpathian, and Mediterranean). Based on the results, we define avenues for further research, connecting hydrology and soil science, on the one hand, and land use planning, social geography and economics, on the other. Our suggestions ultimately call for a transdisciplinary turn in the research of NBS in FRM.
Authors
Christina Fischer Hans Martin Hanslin Knut Anders Hovstad Marcello D'Amico Johannes Kollmann Svenja B. Kroeger Giulia Bastianelli Jan C. Habel Helena Rygne Tommy LennartssonAbstract
Roadsides, in particular those being species-rich and of conservation value, are considered to improve landscape permeability by providing corridors among habitat patches and by facilitating species' dispersal. However, little is known about the potential connectivity offered by such high-value roadsides. Using circuit theory, we modelled connectivity provided by high-value roadsides in landscapes with low or high permeability in south-central Sweden, with ‘permeability’ being measured by the area of semi-natural grasslands. We modelled structural connectivity and, for habitat generalists and specialists, potential functional connectivity focusing on butterflies. We further assessed in which landscapes grassland connectivity is best enhanced through measures for expanding the area of high-value roadsides. Structural connectivity provided by high-value roadsides resulted in similar patterns to those of a functional approach, in which we modelled habitat generalists. In landscapes with low permeability, all target species showed higher movements within compared to between grasslands using high-value roadsides. In landscapes with high permeability, grassland generalists and specialists showed the same patterns, whereas for habitat generalists, connectivity provided by high-value roadsides and grasslands was similar. Increasing the ratio of high-value roadsides can thus enhance structural and functional connectivity in landscapes with low permeability. In contrast, in landscapes with high permeability, roadsides only supported movement of specialised species. Continuous segments of high-value roadsides are most efficient to increase connectivity for specialists, whereas generalists can utilize also short segments of high-value roadsides acting as stepping-stones. Thus, land management should focus on the preservation and restoration of existing semi-natural grasslands. Management for enhancing grassland connectivity through high-value roadsides should aim at maintaining and creating high-value roadside vegetation, preferably in long continuous segments, especially in landscapes with low permeability.
Authors
Stephan Hoffmann Marian Schönauer Joachim Heppelmann Antti Asikainen Emmanuel Cacot Benno Eberhard Hubert Hasenauer Janis Ivanovs Dirk Jaeger Andis Lazdins Sima Mohtashami Tadeusz Moskalik Tomas Nordfjell Krzysztof Stereńczak Bruce Talbot Jori Uusitalo Morgan Vuillermoz Rasmus AstrupAbstract
Purpose of Review Mechanized logging operations with ground-based equipment commonly represent European production forestry but are well-known to potentially cause soil impacts through various forms of soil disturbances, especially on wet soils with low bearing capacity. In times of changing climate, with shorter periods of frozen soils, heavy rain fall events in spring and autumn and frequent needs for salvage logging, forestry stakeholders face increasingly unfavourable conditions to conduct low-impact operations. Thus, more than ever, planning tools such as trafficability maps are required to ensure efficient forest operations at reduced environmental impact. This paper aims to describe the status quo of existence and implementation of such tools applied in forest operations across Europe. In addition, focus is given to the availability and accessibility of data relevant for such predictions. Recent Findings A commonly identified method to support the planning and execution of machine-based operations is given by the prediction of areas with low bearing capacity due to wet soil conditions. Both the topographic wetness index (TWI) and the depth-to-water algorithm (DTW) are used to identify wet areas and to produce trafficability maps, based on spatial information. Summary The required input data is commonly available among governmental institutions and in some countries already further processed to have topography-derived trafficability maps and respective enabling technologies at hand. Particularly the Nordic countries are ahead within this process and currently pave the way to further transfer static trafficability maps into dynamic ones, including additional site-specific information received from detailed forest inventories. Yet, it is hoped that a broader adoption of these information by forest managers throughout Europe will take place to enhance sustainable forest operations.
Authors
Kristin Hamre Giulia Micallef Marie Hillestad Johan Johansen Sofie c Remø Wuxiao Zhang Elisabeth Rasmussen Ødegård Hernandez Pedro W Araujo P. Antony Jesu Prabhu Rune WaagbøAbstract
The hypothesis of the present study was that increased growth in spring, stimulated by increasing temperature and daylength, leads to oxidative stress in Atlantic salmon with accumulation of oxidation products in the tissues and increased utilization of antioxidants. The drop in fillet pigmentation and astaxanthin, often observed in spring by the industry, could be explained by oxidative stress. Furthermore, oxidative stress may cause production related diseases such as development of cataracts and melanin spots in the fillet. We sampled Atlantic salmon from two cages in a commercial scale experiment in Northern Norway (67°N), every month from April until August and then every second month until December (510 ± 160–3060 ± 510 g, mean weight ± std). The specific growth rate (SGR) increased with increasing temperature until midsummer and decreased thereafter. We found that vitamin E in the fillet and vitamin C in the liver were depleted in the spring and were restored in the autumn, even though the dietary concentrations were stable. Astaxanthin concentration in the muscle was constant during the spring and summer and increased in the autumn, concomitant with an increase in astaxanthin supplementation. Cataract increased from zero in May until July, when 90% of the fish were affected. The glutathione based redox-potential in the lenses became more reduced from June, indicating a protective mechanism against oxidative stress and cataract. The number of fish with melanin spots was high in June and decreased in August and October, but the size and intensity of the remaining spots increased in the same period. The change in vitamin C and E concentrations, cataract and glutathione metabolism during spring and early summer, indicate that the fish became oxidized in this period, while malon-di-aldehyde (MDA) and astaxanthin concentrations did not support the hypothesis. There are too few data to draw conclusions on possible effects of oxidative stress on melanin spots.
Abstract
Seed production is an important element of weed population dynamics, and weed persistence relies upon the soil seed bank. In 2017 and 2018, we studied the relationship between the aboveground dry biomass of common weed species and their seed production. Weeds were selected randomly in the fields, and we surrounded the plants with a porous net to collect shed seeds during the growth season. Just before crop harvest, weeds were harvested, the plants’ dry weights were measured, and the number of seeds retained on the weeds was counted. A linear relationship between the biomass and the number of seeds produced was estimated. This relationship was not affected by year for Avena spica-venti, Chenopodium album, Galium aparine, or Persicaria maculosa. Therefore, the data of the two seasons were pooled and analysed together. For Alopecurus myosuroides, Anagallis arvensis, Capsella bursa-pastoris, Geranium molle, Polygonum aviculare, Silene noctiflora, Sonchus arvensis, Veronica persica, and Viola arvensis, the relationship varied significantly between the years. In 2017, the growing season was cold and wet, and the slope of the regression lines was less steep than in the dry season in 2018 for most species. Capsella bursa-pastoris was the most prolific seed producer with the steepest slope.
Authors
Lisa ParuchAbstract
Microbial water quality is of vital importance for human, animal, and environmental health. Notably, pathogenically contaminated water can result in serious health problems, such as waterborne outbreaks, which have caused huge economic and social losses. In this context, the prompt detection of microbial contamination becomes essential to enable early warning and timely reaction with proper interventions. Recently, molecular diagnostics have been increasingly employed for the rapid and robust assessment of microbial water quality implicated by various microbial pollutants, e.g., waterborne pathogens and antibiotic-resistance genes (ARGs), imposing the most critical health threats to humans and the environment. Continuous technological advances have led to constant improvements and expansions of molecular methods, such as conventional end-point PCR, DNA microarray, real-time quantitative PCR (qPCR), multiplex qPCR (mqPCR), loop-mediated isothermal amplification (LAMP), digital droplet PCR (ddPCR), and high-throughput next-generation DNA sequencing (HT-NGS). These state-of-the-art molecular approaches largely facilitate the surveillance of microbial water quality in diverse aquatic systems and wastewater. This review provides an up-to-date overview of the advancement of the key molecular tools frequently employed for microbial water quality assessment, with future perspectives on their applications.
Authors
Leonardo H. Teixeira Guilherme G. Mazzochini Johannes Kollmann Gislene GanadeAbstract
1. Little attention has been paid to phylogenetic diversity during restoration initiatives. Because plant phylogenetic distance can be a surrogate for functional diversity, its consideration could foster the restoration of degraded areas. 2. This study investigates the influence of species richness and phylogenetic relatedness during early restoration of a riparian forest located between the Atlantic Forest and semi-arid ecosystems in NE Brazil. The restoration experiment was established along a perennial stream in Monte Alegre, RN, investigating the significance of species richness and phylogenetic diversity for sapling survival and growth of the restored communities. 3. We used phylogenetic information on 47 tree species naturally occurring at the study site. The resulting phylogenetic tree had a basal node with three major clades. To implement the experiment, three species from each clade were randomly selected, resulting in nine species (from five families). We defined five levels of diversity: (i) no planting, (ii) monoculture, (iii) three phylogenetically related species (same clade), (iv) three phylogenetically distant species (different clades) and (v) nine species. The experiment consisted of 96 (12 m × 10 m) plots established along the two margins of the stream. Overall, 1656 saplings (20–50 cm) were planted in September 2015 (184 per species). We tested whether the survival and growth of saplings are influenced by the number of species planted and phylogenetic distance among them. 4. We assessed plant mortality and growth during two consecutive years (2016 and 2017). Survival was lower but relative growth was higher for plants near the stream. After controlling for differences in initial size, plots with phylogenetically distant species produced significantly taller plants, but only when occurring near the stream. Diversity treatments did not influence plant survival, while initial size determined plant survival and growth. 5. Our findings show that greater phylogenetic distance led to increased plant growth, probably, because of the presence of functionally divergent species that use resources in a complementary way. Therefore, plant phylogenetic relatedness should be considered during the design of restored communities to improve the outcomes of future restoration initiatives.
Abstract
I 2007 vart det første gang utført verdiskapingsberekningar for jordbruket i Møre og Romsdal basert på tal for 2005, og i 2012 vart det gjennomført oppdaterte berekningar basert på tal frå 2010. I denne rapporten er resultatet frå oppdaterte berekningar for jordbruket, basert på tal frå 2020, presentert. I tillegg er det berekna verdiskaping frå landbruksbaserte tilleggsnæringar, skogbruk og landbruksbasert industri. Det er også gjort ein analyse av ringverknader av landbruket i Møre og Romsdal. Det var registrert 13 293 landbrukseigedomar i Møre og Romsdal i 2020. Medan talet på landbruks-eigedomar i Møre og Romsdal er redusert med 6,6 prosent frå 2010 til 2020, er talet jordbruksføretak redusert med 21 prosent. 2 390 jordbruksføretak søkte om produksjonstilskot i 2020. Frå 2010 til 2020 gjekk jordbruksareal i alt i fylket ned med 10 prosent, frå 568 981 dekar til 509 409 dekar. Gjennomsnittsarealet per bruk i Møre og Romsdal var 187 dekar i 2010, 201 dekar i 2015 og 213 dekar i 2020. Verdiskaping frå jordbruket i Møre og Romsdal rekna som bruttoprodukt, er berekna til 1 025 mill. kr i 2020. Det er 49 mill. kr mindre enn det som vart berekna for 2010 (målt i 2020 kr.). Av den totale verdiskapinga frå jordbruket i Møre og Romsdal, kjem 36 % frå kommunane Hustadvika, Surnadal, Molde og Volda. Sysselsettinga i jordbruket er berekna til 2 292 årsverk. Det er 706 årsverk mindre enn i 2010. Frå 2010 til 2020 er verdiskapinga auka med kr 85 500 per årsverk i jordbruket i Møre og Romsdal. Av den totale verdiskapinga i 2020, rekna som bruttoprodukt, kjem 67 prosent frå mjølke-produksjon Samanlikna med 2010, utgjer mjølkeproduksjon tre prosentpoeng mindre av verdiskapinga i fylket. Verdiskapinga i sauehaldet har gått ned med knapt to prosentpoeng frå 2010, medan kjøtproduksjon med ammekyr har auka med fire prosentpoeng i same periode. Svinehaldet har gått ned med eitt prosentpoeng, samanlikna med 2010. Om lag to prosent av dei sysselsette i landet som arbeider i skogbruket, hadde arbeidsstad i Møre og Romsdal, og i 2020 var 132 personar sysselsette i skogbruket i fylket. I Møre og Romsdal ble det avverka ca. 271 200 m3 industrivirke i 2020. Det utgjer om lag 2,6 prosent av den samla avverkinga i landet. Berekna omsetnadsverdi av skogprodukta i Møre og Romsdal er samla berekna til 212 mill. kroner i 2020, og verdiskaping rekna som bruttoprodukt for skogbruket er berekna til 186 mill. kr. Surnadal og Rauma er dei to kommunane som har høgast verdiskaping frå skogbruket i 2020, med høvesvis 19,1 og 16,9 millionar kroner. Leigekøyring og utmarksnæring er dei mest vanlege tilleggsnæringane i Møre og Romsdal. Av dei som driv tilleggsnæring, er det 26 prosent som driv leigekøyring, og 21 som driv ei eller anna form for utmarksnæring. Verdiskaping frå tilleggsnæringar, rekna som bruttoprodukt, er berekna til 162 mill. kr for Møre og Romsdal i 2020. Det er leigekøyring og tenesteyting som bidreg med høgast verdiskaping med i overkant av 40 mill. kr kvar. Av kommunane er det Surnadal som har størst verdiskaping frå tilleggsnæring med 15,6 mill. kroner. Sysselsettinga frå dei landbruksbaserte tilleggsnæringane er berekna til 165 årsverk à 1845 timar for 2020. Samla sett har sysselsettinga i næringsmiddelindustrien i Møre og Romsdal auka med 2,3 prosent frå 3 464 i 2015 til 3 545 i 2020. Berekning av verdiskaping innanfor jordbruksbasert verksemd tar utgangspunkt i tal sysselsette ein kan seia er avhengig av lokalt jordbruk. Totalt er dette vurdert til å vere 850 sysselsette i Møre og Romsdal i 2020. For skogbruksbasert industri er det 539 sysselsette i fylket i 2020. Av desse er 35 vurdert å vere avhengig av lokalt skogbruk. Verdiskapinga i landbruksbasert industri som ein kan hevda er avhengig av landbruk i Møre og Romsdal er berekna til å utgjera 1 173 millionar kr., der næringsmiddelindustrien står for 1 151 millionar kr....