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
Authors
Anne Catriona Mehlhoop Bram Van Moorter Christer Moe Rolandsen Dagmar Hagen Aksel Granhus Rune Eriksen Thor Harald Ringsby Erling Johan SolbergAbstract
Like large carnivores, hunters both kill and scare ungulates, and thus might indirectly affect plant performance through trophic cascades. In this study, we hypothesized that intensive hunting and enduring fear of humans have caused moose and other forest ungulates to partly avoid areas near human infrastructure (perceived hunting risk), with positive cascading effects on recruitment of trees. Using data from the Norwegian forest inventory, we found decreasing browsing pressure and increasing tree recruitment in areas close to roads and houses, where ungulates are more likely to encounter humans. However, although browsing and recruitment were negatively related, reduced browsing was only responsible for a small proportion of the higher tree recruitment near human infrastructure. We suggest that the apparently weak cascading effect occurs because the recorded browsing pressure only partly reflects the long-term browsing intensity close to humans. Accordingly, tree recruitment was also related to the density of small trees 5–10 years earlier, which was higher close to human infrastructure. Hence, if small tree density is a product of the browsing pressure in the past, the cascading effect is probably stronger than our estimates suggest. Reduced browsing near roads and houses is most in line with risk avoidance driven by fear of humans (behaviorally mediated), and not because of excessive hunting and local reduction in ungulate density (density mediated).
Authors
Shelemia Nyamuryekung'e Andres F. Cibils Richard Estell Dawn VanLeeuwen Sheri Spiegal Caitriana M. Steele Alfredo L. Gonzalez Matthew M. McIntosh Qixu Gong Huiping CaoAbstract
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Authors
Mette Goul Thomsen Anne-Kristin Løes Randi Seljåsen Tatiana Francischinelli Rittl Kari BysveenAbstract
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Authors
Finn-Arne HaugenAbstract
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Authors
Michel VerheulAbstract
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Abstract
Gravplassmyndigheten i Larvik planlegger å utvide Kvelde Kirkegård i Larvik kommune. Utbyggingen vil føre til nedbygging av dyrka mark på gnr. 2090/bnr. 69, og jorda må derfor flyttes for å opparbeide nye jordbruksareal. Det er gjort vurdering av jordsmonnet på det dyrka arealet og foretatt en vurdering av hvor mye av jorda som egner seg til jordflytting. Jordsmonnsundersøkelser på området på Kvelde viste at det var siltige sandmasser i matjordlaget. I undergrunnsjorda var det små variasjoner av mengde sand og leire i jorden, men høyt siltinnhold i alle lag med unntak av en sandbanke med mellomsand. Arealet som skal jordflyttes er lite, men kan brukes til nydyrking for å utvide eksisterende jordbruksareal, eller for jordforbedring på grunnlendt jorde. Dette kan gi større sammenhengende jorder med stor driftsverdi.
Authors
Till SeehusenAbstract
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Authors
Michel VerheulAbstract
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Authors
Yeqing Li Zhangmu Jing Junting Pan Gang Luo Lu Feng Hao Jiang Hongjun Zhou Quan Xu Yanjuan Lu Hongbin LiuAbstract
Due to the diversity of microbiota and the high complexity of their interactions that mediate biogas production, a detailed understanding of the microbiota is essential for the overall stability and performance of the anaerobic digestion (AD) process. This study evaluated the microbial taxonomy, metabolism, function, and genetic differences in 14 full-scale biogas reactors and laboratory reactors operating under various conditions in China. This is the first known study of the microbial ecology of AD at food waste (FW) at a regional scale based on multi-omics (16S rRNA gene amplicon sequencing, metagenomics, and proteomics). Temperature significantly affected the bacterial and archaeal community structure (R2 = 0.996, P = 0.001; R2 = 0.846, P < 0.002) and total inorganic carbon(TIC) slightly changed the microbial structure (R2 = 0.532, P = 0.005; R2 = 0.349, P = 0.016). The Wood-Ljungdahl coupled with hydrogenotrophic methanogenic pathways were dominant in the thermophilic reactors, where the acs, metF, cooA, mer, mch and ftr genes were 10.1-, 2.8-, 16.2-, 1.74-, 4.15-, 1.04-folds of the mesophilic reactors (P < 0.01). However, acetoclastic and methylotrophic methanogenesis was the primary pathway in the mesophilic reactors, where the ackA, pta, cdh and mta genes were 2.2-, 3.2-, 14.3-, 1.88-folds of the thermophilic group (P < 0.01). Finally, the Wilcoxon rank-sum test was applied to explain the cause of the temperature affecting AD microbial activities. The findings have deepened the understanding of the effect of temperature on AD microbial ecosystems and are expected to guide the construction and management of full-scale FW biogas plants.
Authors
Pedro Caldas Britto Dirk Jaeger Stephan Hoffmann Renato Cesar Goncalves Robert Alexander Christian Vibrans Alfredo Celso FantiniAbstract
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