2021
Sammendrag
Skjøtselsplanen for Kvalholmen i Vega kommune har blitt utarbeidet på oppdrag fra Fylkesmannen i Nordland, miljøvernavdelingen. Skjøtselsplanen gir faglig funderte anbefalinger for skjøtsel av kystlynghei, naturbeitemark og slåttemark på Kvalholmen. Skjøtselsanbefalinger tar hensyn til brukernes driftsopplegg, kapasitet og ønsker. Skjøtselsplanmalen er delt inn i ulike kapitler som bl.a. gir generell informasjon om aktuelle utvalgte naturtyper, generell beskrivelse av naturgrunnlaget innenfor lokaliteten og en beskrivelse av dagens drift.
Forfattere
Annette Bär Elena Albertsen Bolette Bele Synnøve Grenne Simon Jakobsson Erik Solbu Pål Thorvaldsen Per Vesterbukt Sølvi Wehn Line JohansenSammendrag
Det er utviklet en metode for arealrepresentativ overvåking av semi-naturlig eng i Norge (ASO). ASO er tilpasset Arealrepresentativ naturovervåking (ANO) slik at den kan levere data som kan benyttes til å beregne økologisk tilstand for semi-naturlig eng. Denne rapporten beskriver uttesting av ASO metoden i felt 2020, en ferdigstilt metode basert på erfaringer med uttestingen, forslag til utvalg av områder som skal overvåkes, beregning av økologisk tilstand, kostnadsestimater, forslag til tre alternative ASO og en feltinstruks.
Forfattere
Dina Stober Monika Suškevičs Sebastian Eiter Stefanie Müller Stanislav Martinat Matthias BucheckerSammendrag
Det er ikke registrert sammendrag
2020
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Pia HeltoftSammendrag
Det er ikke registrert sammendrag
Forfattere
Arne SteffenremSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Paul C. Rogers Bradley D. Pinno Jan Šebesta Benedicte R. Albrectsen Guoqing Li Natalya Ivanova Antonín Kusbach Timo Kuuluvainen Simon M. Landhäusser Hongyan Liu Tor Myking Pertti Pulkkinen Zhongming Wen Dominik KulakowskiSammendrag
Across the northern hemisphere, six species of aspen (Populus spp.) play a disproportionately important role in promoting biodiversity, sequestering carbon, limiting forest disturbances, and providing other ecosystem services. These species are illustrative of efforts to move beyond single-species conservation because they facilitate hundreds of plants and animals worldwide. This review is intended to place aspen in a global conservation context by focusing on the many scientific advances taking place in such biologically diverse systems. In this manner, aspen may serve as a model for other widespread keystone systems where science-based practice may have world implications for biodiversity conservation. In many regions, aspen can maintain canopy dominance for decades to centuries as the sole major broadleaf trees in forested landscapes otherwise dominated by conifers. Aspen ecosystems are valued for many reasons, but here we highlight their potential as key contributors to regional and global biodiversity. We present global trends in research priorities, strengths, and weaknesses based on, 1) a qualitative survey, 2) a systematic literature analysis, and 3) regional syntheses of leading research topics. These regional syntheses explore important aspen uses, threats, and research priorities with the ultimate intent of research sharing focused on sound conservation practice. In all regions, we found that aspen enhance biodiversity, facilitate rapid (re)colonization in natural and damaged settings (e.g., abandoned mines), and provide adaptability in changing environments. Common threats to aspen ecosystems in many, but not all, regions include effects of herbivory, land clearing, logging practices favoring conifer species, and projected climate warming. We also highlight regional research gaps that emerged from the three survey approaches above. We believe multi-scale research is needed that examines disturbance processes in the context of dynamic climates where ecological, physiological, and genetic variability will ultimately determine widespread aspen sustainability. Based on this global review of aspen research, we argue for the advancement of the “mega-conservation” strategy, centered on the idea of sustaining a set of common keystone communities (aspen) that support wide arrays of obligate species. This approach contrasts with conventional preservation which focuses limited resources on individual species residing in narrow niches.
Forfattere
Isabella Righini Bram Vanthoor Michel Verheul Naseer Muhammad Henk Maessen Tomas Persson Cecilia StanghelliniSammendrag
A greenhouse climate-crop yield model was adapted to include additional climate modification techniques suitable for enabling sustainable greenhouse management at high latitudes. Additions to the model were supplementary lighting, secondary heating and heat harvesting technologies. The model: 1) included the impact of different light sources on greenhouse air temperature and tomato production 2) included a secondary heating system 3) calculated the amount of harvested heat whilst lighting was used. The crop yield model was not modified but it was validated for growing tomato in a semi-closed greenhouse equipped with HPS lamps (top-lights) and LED (inter-lights) in Norway. The combined climate-yield model was validated with data from a commercial greenhouse in Norway. The results showed that the model was able to predict the air temperature with sufficient accuracy during the validation periods with Relative Root Mean Square Error <10%. Tomato yield was accurately simulated in the cases under investigation, yielding a final production difference between 0.7% and 4.3%. Lack of suitable data prevented validation of the heat harvest sub-model, but a scenario is presented calculating the maximum harvestable heat in an illuminated greenhouse. Given the cumulative energy used for heating, the total amount of heating pipe energy which could be fulfilled with the heat harvestable from the greenhouse air was around 50%. Given the overall results, the greenhouse climate(-crop yield) model modified and presented in this study is considered accurate enough to support decisions about investments at farm level and/or evaluate beforehand the possible consequences of environmental policies.