SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "LAR1:miun ;lar1:(slu)"

Sökning: LAR1:miun > Sveriges Lantbruksuniversitet

  • Resultat 1-10 av 72
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Andersson, K., et al. (författare)
  • High-accuracy sampling of saproxylic diversity indicators at regional scales with pheromones : The case of Elater ferrugineus (Coleoptera, Elateridae)
  • 2014
  • Ingår i: Biological Conservation. - : Elsevier BV. - 0006-3207 .- 1873-2917. ; 171, s. 156-166
  • Tidskriftsartikel (refereegranskat)abstract
    • The rare beetle Elater ferrugineus was sampled at 47 sites in the county of Östergötland, Sweden by means of pheromone-baited traps to assess its value as an indicator species for hollow oak stands rich in rare saproxylic beetle species. In addition, Osmoderma eremita was also sampled with pheromone baits. These data were then compared against species survey data collected at the same sites by pitfall and window traps. Both species co-occur with many Red Listed saproxylic beetles, with E. ferrugineus being a somewhat better indicator for the rarest species. The conservation value of a site (measured as Red List points or number of Red Listed species) increased with the number of specimens of E. ferrugineus and O. eremita caught. Accuracy of sampling by means of pheromone trapping turned out to be radically different for the two model species. E. ferrugineus traps put out during July obtained full accuracy after only 6. days, whereas O. eremita traps needed to be out from early July to mid-August in order to obtain full accuracy with one trap per site. By using E. ferrugineus, or preferably both species, as indicator species, accuracy would increase and costs decrease for saproxylic biodiversity sampling, monitoring and identification of hotspots. © 2014 Elsevier Ltd.
  •  
2.
  •  
3.
  •  
4.
  • Angelstam, Per, et al. (författare)
  • Protecting forest areas for biodiversity in Sweden 1991–2010: the policy implementation process and outcomes on the ground
  • 2011
  • Ingår i: Silva Fennica. - : Finnish Society of Forest Science. - 0037-5330 .- 2242-4075. ; 45, s. 1111-1133
  • Tidskriftsartikel (refereegranskat)abstract
    • Swedish forest and environmental policies imply that forests should be managed so that all naturally occurring species are maintained in viable populations. This requires maintenance of functional networks of representative natural forest and cultural woodland habitats. We first review the policy implementation process regarding protected areas in Sweden 1991-2010, how ecological knowledge was used to formulate interim short-term and strategic long-term biodiversity conservation goals, and the development of a hierarchical spatial planning approach. Second, we present data about the amount of formally protected and voluntarily set aside forest stands, and evaluate how much remains in terms of additional forest protection, conservation management and habitat restoration to achieve forest and environmental policy objectives in the long-term. Third, a case study in central Sweden was made to estimate the functionality of old Scots pine, Norway spruce and deciduous forest habitats, as well as cultural woodland, in different forest regions. Finally, we assess operational biodiversity conservation planning processes. We conclude that Swedish policy pronouncements capture the contemporary knowledge about biodiversity and conservation planning well. However, the existing area of protected and set-aside forests is presently too small and with too poor connectivity. To bridge this gap, spatial planning, management and restoration of habitat, as well as collaboration among forest and conservation planners need to be improved.
  •  
5.
  • Ankre, Rosemarie, 1975-, et al. (författare)
  • Managers' experiences of visitor monitoring in Swedish outdoor recreational areas
  • 2016
  • Ingår i: Journal of Outdoor Recreation and Tourism Research Planning and Management. - : Elsevier. - 2213-0780 .- 2213-0799. ; 14, s. 35-40
  • Tidskriftsartikel (refereegranskat)abstract
    • Systematically collected information on outdoor recreation participation, motives and behaviors can improve recreation opportunities and reduce the risk of user conflicts. There are many uses of this type of information for managers of recreational areas including analyses of environmental, social and economic impacts, development of infrastructure, and marketing to appropriate audiences. One key component in building this knowledge is the application of visitor monitoring. This study takes an exploratory approach by analyzing managers' experiences on different on-site monitoring methods at 12 recreational areas in Sweden. Results show that knowledge of these methods and their use are strongly linked to individual managers' skills and competence. Contemporary changes in recreation behavior calls for more innovative monitoring approaches, but managers included in this study primarily work with rather traditional methods, which is likely representative of the overall situation in Sweden. Networking, educational programs and closer collaborations with universities could facilitate some of the challenges identified.Management implications● The study showed the relevance of improved visitor monitoring practices, and tailor-made monitoring guidelines, based on actual use and experience-based data.● Adequate visitor monitoring practices:- help to better incorporate recreation activities and values in natural resource management decisions,● increase the awareness of possible conflicts between recreational and other resource users,● show the possible need for increased management capacity, additional training or new ways of visitor management and provide a better foundation for decision making.
  •  
6.
  • Becher, Paul, et al. (författare)
  • The Scent of the Fly
  • 2018
  • Ingår i: Journal of Chemical Ecology. - : Springer Science and Business Media LLC. - 0098-0331 .- 1573-1561. ; 44:5, s. 431-435
  • Tidskriftsartikel (refereegranskat)abstract
    • (Z)-4-undecenal (Z4-11Al) is the volatile pheromone produced by females of the vinegar fly Drosophila melanogaster. Female flies emit Z4-11Al for species-specific communication and mate-finding. A sensory panel finds that synthetic Z4-11Al has a characteristic flavour, which can be perceived even at the small amounts produced by a single female fly. Since only females produce Z4-11Al, and not males, we can reliably distinguish between single D. melanogaster males and females, according to their scent. Females release Z4-11Al at 2.4 ng/h and we readily sense 1 ng synthetic Z4-11Al in a glass of wine (0.03 nmol/L), while a tenfold concentration is perceived as a loud off-flavour. This corroborates the observation that a glass of wine is spoilt by a single D. melanogaster fly falling into it, which we here show is caused by Z4-11Al. The biological role of Z4-11Al or structurally related aldehydes in humans and the basis for this semiochemical convergence remains yet unclear. 
  •  
7.
  • Berglund, Håkan, et al. (författare)
  • Quantifying habitat requirements of tree-living species in fragmented boreal forests with Bayesian methods
  • 2009
  • Ingår i: Conservation Biology. - : Wiley. - 0888-8892 .- 1523-1739. ; 23:5, s. 1127-1137
  • Tidskriftsartikel (refereegranskat)abstract
    • Quantitative conservation objectives require detailed consideration of the habitat requirements of target species. Tree-living bryophytes, lichens, and fungi are a critical and declining biodiversity component of boreal forests. To understand their requirements, Bayesian methods were used to analyze the relationships between the occurrence of individual species and habitat factors at the tree and the stand scale in a naturally fragmented boreal forest landscape. The importance of unexplained between-stand variation in occurrence of species was estimated, and the ability of derived models to predict species' occurrence was tested. The occurrence of species was affected by quality of individual trees. Furthermore, the relationships between occurrence of species at the tree level and size and shape of stands indicated edge effects, implying that some species were restricted to interior habitats of large, regular stands. Yet for the habitat factors studied, requirements of many species appeared similar. Species occurrence also varied between stands; most of the seemingly suitable trees in some stands were unoccupied. The models captured most variation in species occurrence at tree level. They also successfully accounted for between-stand variation in species occurrence, thus providing realistic simulations of stand-level occupancy of species. Important unexplained between-stand variation in species occurrence warns against a simplified view that only local habitat factors influence species' occurrence. Apparently, similar stands will host populations of different sizes due to historical, spatial, and stochastic factors. Thus, habitat suitability cannot be assessed simply by population sizes, and stands lacking a species may still provide suitable habitat and merit protection. 
  •  
8.
  • Borrero, Felipe, et al. (författare)
  • The female sex pheromone (Z)-4-undecenal mediates flight attraction and courtship in Drosophila melanogaster
  • 2022
  • Ingår i: Journal of insect physiology. - : Elsevier BV. - 0022-1910 .- 1879-1611. ; 137
  • Tidskriftsartikel (refereegranskat)abstract
    • Specific mate communication and recognition underlies reproduction and hence speciation. Our study provides new insights in Drosophila melanogaster premating olfactory communication. Mate communication evolves during adaptation to ecological niches and makes use of social signals and habitat cues. Female-produced, species-specific volatile pheromone (Z)-4-undecenal (Z4-11Al) and male pheromone (Z)-11-octadecenyl acetate (cVA) interact with food odour in a sex-specific manner. Furthermore, Z4-11Al, which mediates upwind flight attraction in both sexes, also elicits courtship in experienced males. Two isoforms of the olfactory receptor Or69a are co-expressed in the same olfactory sensory neurons. Z4-11Al is perceived via Or69aB, while the food odorant (R)-linalool is a main ligand for the other variant, Or69aA. However, only Z4-11Al mediates courtship in experienced males, not (R)-linalool. Behavioural discrimination is reflected by calcium imaging of the antennal lobe, showing distinct glomerular activation patterns by these two compounds. Male sex pheromone cVA is known to affect male and female courtship at close range, but does not elicit upwind flight attraction as a single compound, in contrast to Z4-11Al. A blend of the food odour vinegar and cVA attracted females, while a blend of vinegar and female pheromone Z4-11Al attracted males, instead. Sex-specific upwind flight attraction to blends of food volatiles and male and female pheromone, respectively, adds a new element to Drosophila olfactory premating communication and is an unambiguous paradigm for identifying the behaviourally active components, towards a more complete concept of food-pheromone odour objects.
  •  
9.
  • Borrero, Felipe, et al. (författare)
  • Yeast Volatomes Differentially Affect Larval Feeding in an Insect Herbivore
  • 2019
  • Ingår i: Applied and Environmental Microbiology. - 0099-2240 .- 1098-5336. ; 85
  • Tidskriftsartikel (refereegranskat)abstract
    • Yeasts form mutualistic interactions with insects. Hallmarks of this interaction include provision of essential nutrients, while insects facilitate yeast dispersal and growth on plant substrates. A phylogenetically ancient chemical dialogue coordinates this interaction, where the vocabulary, the volatile chemicals that mediate the insect response, remains largely unknown. Here, we used gas chromatography-mass spectrometry, followed by hierarchical cluster and orthogonal partial least-squares discriminant analyses, to profile the volatomes of six Metschnikowia spp., Cryptococcus nemorosus, and brewer's yeast (Saccharomyces cerevisiae). The yeasts, which are all found in association with insects feeding on foliage or fruit, emit characteristic, species-specific volatile blends that reflect the phylogenetic context. Species specificity of these volatome profiles aligned with differential feeding of cotton leafworm (Spodoprera littoralis) larvae on these yeasts. Bioactivity correlates with yeast ecology; phylloplane species elicited a stronger response than fruit yeasts, and larval discrimination may provide a mechanism for establishment of insect-yeast associations. The yeast volatomes contained a suite of insect attractants known from plant and especially floral headspace, including (Z)-hexenyl acetate, ethyl (2E,4Z)-deca-2,4-dienoate (pear ester), (3E)-4,8-dimethylnona-1,3,7-triene (DMNT), linalool, alpha-terpineol, beta-myrcene, or (E,E)-alpha-farnesene. A wide overlap of yeast and plant volatiles, notably floral scents, further emphasizes the prominent role of yeasts in plant-microbe-insect relationships, including pollination. The knowledge of insect-yeast interactions can be readily brought to practical application, as live yeasts or yeast metabolites mediating insect attraction provide an ample tool-box for the development of sustainable insect management.IMPORTANCE Yeasts interface insect herbivores with their food plants. Communication depends on volatile metabolites, and decoding this chemical dialogue is key to understanding the ecology of insect-yeast interactions. This study explores the volatomes of eight yeast species which have been isolated from foliage, from flowers or fruit, and from plant-feeding insects. These yeasts each release a rich bouquet of volatile metabolites, including a suite of known insect attractants from plant and floral scent. This overlap underlines the phylogenetic dimension of insect-yeast associations, which according to the fossil record long predate the appearance of flowering plants. Volatome composition is characteristic for each species, aligns with yeast taxonomy, and is further reflected by a differential behavioral response of cotton leafworm larvae, which naturally feed on foliage of a wide spectrum of broad-leaved plants. Larval discrimination may establish and maintain associations with yeasts and is also a substrate for designing sustainable insect management techniques.
  •  
10.
  • Dawson, Samantha K., et al. (författare)
  • Convergence of fungal traits over time in natural and forestry-fragmented patches
  • 2020
  • Ingår i: Biological Conservation. - : Elsevier BV. - 0006-3207 .- 1873-2917. ; 251
  • Tidskriftsartikel (refereegranskat)abstract
    • Setting aside small remnant patches of high biodiversity forest within managed forest landscapes is often used as conservation measure to provide a refuge and future source population of forest biodiversity, including wood-inhabiting fungal communities. Yet little is known about the long-term fungal community assembly, how these small, isolated patches change through time and how forest management in the surrounding landscape impacts traits and community functionality housed within. We applied a joint species distribution model to compare how fungal traits and communities changed over two survey periods undertaken ~20 years apart in boreal forest set-aside and natural patches. Natural patches in naturally fragmented landscapes were considered reference forests for small, remnant, near-natural forest patches in intensively managed forest landscapes. We found the majority of fungal traits converged over time between set-aside and natural patches, without changes in overall species richness. Red-listed species occurrence was initially lower in set-aside patches, but reached a comparable level of natural patches over time as a result of opposing changes in both patch types. Functional trait changes were larger in set-aside patches, but convergence was also related to opposing changes in natural patches. This is the first study to directly measure and test wood fungal community trait-environment relationships over time in small, high-conservation value forest patches. The long-term functional trait and red-listed species values of set-asides, coupled with their capacity for old-growth recovery, make them valuable focal areas for conservation. 
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 72
Typ av publikation
tidskriftsartikel (58)
forskningsöversikt (4)
rapport (3)
annan publikation (2)
konferensbidrag (2)
bokkapitel (2)
visa fler...
konstnärligt arbete (1)
licentiatavhandling (1)
visa färre...
Typ av innehåll
refereegranskat (65)
övrigt vetenskapligt/konstnärligt (5)
populärvet., debatt m.m. (2)
Författare/redaktör
Jonsson, Bengt-Gunna ... (17)
Hedenström, Erik, 19 ... (8)
Svensson, Johan (6)
Daniel, Geoffrey (6)
Mikusinski, Grzegorz (6)
Angelstam, Per (5)
visa fler...
Dimitriou, Ioannis (5)
Schroeder, Martin (5)
Bengtsson, Marie (4)
Jönsson, Mari (4)
Fernando, Dinesh (4)
Witzgall, Peter (4)
Larsson, Mattias (3)
Liu, Huihui (3)
Engstrand, Per (3)
Gentili, Francesco (3)
Hedenström, Erik (3)
Roberge, Jean-Michel (3)
Becher, Paul (3)
Jonsson, Bengt Gunna ... (3)
Yang, Haiping (3)
Chen, Yingquan (3)
Borrero, Felipe (3)
Andersson, Kjell (2)
Andersson, Fredrik (2)
Ovaskainen, Otso (2)
Mohammadi Limaei, So ... (2)
Hellström, Karin (2)
Stenlid, Jan (2)
Börjesson, Pål (2)
Berglund, Håkan (2)
Dahlberg, Anders (2)
Mark-Herbert, Cecili ... (2)
Johansson, Maria (2)
Sjöström, Rita (2)
Berndes, Göran, 1966 (2)
Bång, Joakim (2)
Eriksson, Ola (2)
Andersson, Jon (2)
Axelsson, Robert (2)
Törnblom, Johan (2)
Sandberg, Christer (2)
Zetterberg, Lena (2)
Snäll, Tord (2)
Nilsson, Malin (2)
Frank, Jens (2)
Palo, Thomas (2)
Flykt, Anders (2)
Lebreton, Sebastien (2)
Wallin, Erika, 1985- (2)
visa färre...
Lärosäte
Mittuniversitetet (72)
Språk
Engelska (69)
Svenska (3)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (46)
Lantbruksvetenskap (41)
Teknik (16)
Samhällsvetenskap (14)
Medicin och hälsovetenskap (2)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy