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.
2017
Sammendrag
Questions What are the effects of abandonment on plant diversity in semi-natural grasslands? Do the effects of abandonment on taxonomic and functional diversity vary along environmental gradients of climate and soil? Location West and mid-Norway. Methods Plant composition was surveyed in 110 subplots of 4 m2 in 14 sites across grazed and abandoned semi-natural grasslands. Climate data were extracted and soil composition analysed. To reduce the number of explanatory variables and deal with collinearity, we performed PCA. Data on the plant species vegetative height (H), leaf dry matter content (LDMC), specific leaf area (SLA), seed mass (SM) and number of seeds per plant (SNP) for 175 species were extracted from the LEDA database. Measures of plant diversity (species richness, CWM of functional traits and functional diversity (evenness and range)) were calculated for each subplot. To estimate the effects of abandonment on plant diversity and examine how these effects are moderated by gradients in soil and climate, we fitted mixed models to the data including site as a random effect. Results Species richness in the subplots was lower in abandoned semi-natural grasslands, especially on more calcareous soils. CWM H, LDMC and SM were higher in abandoned semi-natural grasslands. CWM LDMC was only higher in the driest subplots. The ranges in H, SLA and SM, as well as evenness in LDMC were also higher in abandoned semi-natural grasslands,but the range in LDMC was lower. Conclusions It is important to assess both taxonomic and functional diversity to understand ecosystem processes. The species pool in ecosystems influenced by a long history of intermediate grazing includes a high proportion of low stature, grazing-tolerant plant species. Abandonment of extensive land-use practices will cause a decline in taxonomic diversity (plant species richness) in such systems due to increased abundance of plants with high stature that outcompete the lower, grazing-tolerant plants. This process is predominant especially if moisture, soil fertility and pH are at intermediate levels. Changes in species communities due to abandonment will also influence ecosystem functioning, such as nutrient turnover and fodder production resilience.
Sammendrag
Semi-naturlig eng er en sjelden naturtype i Norge med et høyt biologisk mangfold. Naturtypen er i sterk tilbakegang og truet men det mangler arealrepresentative tall for denne tilbakegangen og tilstanden som gjenværende arealer innehar. Det er derfor utviklet en metode for arealrepresentativ overvåking av semi- naturlig eng i Norge. Rapporten beskriver et forslag til metode for en helhetlig overvåking av forekomst og tilstand til semi-naturlig eng i Norge og biologisk mangfold knyttet til naturtypen.
Sammendrag
I dette prosjektet har vi utviklet ny indikator, Gjengroing i kystlynghei, for Naturindeks innen åpent lavland og mobilisert data på og analysert påvirkningsfaktorer som er viktige for å forklare utviklingen i temaindeksene Tilstand gras og urterik mark og Tilstand kystlynghei innen økosystem åpent lavland.
Sammendrag
Prosjektets mål har vært å utvikle datagrunnlaget for naturindeks for økosystem fjell.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Semi-natural grasslands are in decline due to land use changes. To conserve grassland ecosystems, agrienvironmental schemes facilitate low intensity management of semi-natural grasslands of high nature value. In addition to management of the meadows themselves, the nature value of the hay meadows also depends upon the surrounding landscape. The aim of this study was to assess the importance of the landscape on the biological value of semi-natural hay meadows implemented in the Action Plan for Hay Meadows (APHM) in Norway. The biological value was estimated by richness of all vascular plant species and of vascular plant species associated with semi-natural grassland. Richness was high in semi-natural grasslands, particularly in hay meadows implemented in the APHM. However, the landscape context also influenced the richness of the hay meadows. Species richness increased with hay meadow area and length and edge density of semi-natural habitats types in the landscapes.
Forfattere
Line Johansen T. Lennartsson Anna Westin A. Iuga C.M. Ivascu Eveliina Kallioniemi Sølvi WehnSammendrag
Det er ikke registrert sammendrag
Forfattere
Line Johansen T. Lennartsson Anna Westin A. Iuga C.M. Ivascu Eveliina Kallioniemi Sølvi WehnSammendrag
Semi-natural grasslands are important habitats for pollinators because of high abundance of flowering plants. The aim of this study was to assess effects of mowing time on flower resources for pollinators in semi-natural hay meadows. Flowering species in semi-natural hay meadows throughout a landscape in Maramures, Romania were used as indicators of flower resources for pollinators. Botanical surveys were performed in 31 hay meadows and all herbs and shrubs were recorded in hay meadows cut early, intermediate and late in the growing season. All hay meadows included a high number of flower species but the mowing time influenced the available floral resources for pollinators. If mowing time varies between hay meadows within a landscape, flower resources for pollinators will be available throughout the growing season, which is essential in pollination conservation in agricultural landscapes.
Sammendrag
Prosjektets mål har vært å evaluere avgjørende aspekter, både økologiske og samfunnsmessige, ved Handlingsplan for slåttemark. Mulighetene for adaptiv skjøtsel og bruk av tradisjonell økologisk kunnskap (TRØK) er hovedtema. For å sikre en enda bedre forvaltning av biologiske verdier knyttet til slåttemark er det basert på prosjektets resultater definet ni anbefalinger.
Sammendrag
Rapporten gir en beskrivelse av slåttemarkslokalitetene Oksfjellelv nord og Oksfjellelv sør, Hemnes kommune, og gir reviderte skjøtselsanbefalinger. Beskrivelsen av slåttemarkene og deres utvikling tar utgangspunkt i kartleggingen fra 2010, feltbefaring i 2017 og informasjon fra grunneier om gjennomførte skjøtselstiltak. Anbefalte skjøtselstiltak er en sein slått kombinert med bruk av hvileår i skrinne partier. For partier dominert av strandrør anbefales restaurering og 2 gangers slått.