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A-Z of Gravity's End - Your Ultimate Guide to Free Fall and Levitation
- 2019
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- How did the Tibetan monks levitate heavy boulders? What is barophobia and who was Qamar Ali? How did Ann Hodges' life turn out, the only human on earth hit by a meteorite? This book is more than simply a guide or glossary, it responds to the colossal themes of levitation and free fall through an artistic lens. It contains scientific, artistic and mystical examples, reflections and fictional stories by different authors on the phenomena and history of gravity, weightlessness, levitation and their antithesis: the art of falling. It is a collage, a summary of the artists own experiments and investigations, that will take the reader on a journey that straddles the fictional and the real. The book contains stories in which for example humans, frogs and objects are capable of floating freely through space, be it through magic, cheap tricks, advanced technology or other, more imaginative methods. Contributors: Aaron Schuster, Pamela Jaskoviak, Mikael Lövgren and Ann-Charlotte Glasberg Blomqvist
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- Baskaran, Preetisri, et al.
(författare)
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Modelling the influence of ectomycorrhizal decomposition on plant nutrition and soil carbon sequestration in boreal forest ecosystems
- 2017
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Ingår i: New Phytologist. - : Wiley. - 0028-646X .- 1469-8137. ; 213:3, s. 1452-1465
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Tidskriftsartikel (refereegranskat)abstract
- Tree growth in boreal forests is limited by nitrogen (N) availability. Most boreal forest trees form symbiotic associations with ectomycorrhizal (ECM) fungi, which improve the uptake of inorganic N and also have the capacity to decompose soil organic matter (SOM) and to mobilize organic N (ECM decomposition'). To study the effects of ECM decomposition' on ecosystem carbon (C) and N balances, we performed a sensitivity analysis on a model of C and N flows between plants, SOM, saprotrophs, ECM fungi, and inorganic N stores. The analysis indicates that C and N balances were sensitive to model parameters regulating ECM biomass and decomposition. Under low N availability, the optimal C allocation to ECM fungi, above which the symbiosis switches from mutualism to parasitism, increases with increasing relative involvement of ECM fungi in SOM decomposition. Under low N conditions, increased ECM organic N mining promotes tree growth but decreases soil C storage, leading to a negative correlation between C stores above- and below-ground. The interplay between plant production and soil C storage is sensitive to the partitioning of decomposition between ECM fungi and saprotrophs. Better understanding of interactions between functional guilds of soil fungi may significantly improve predictions of ecosystem responses to environmental change.
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- Ecke, Frauke, et al.
(författare)
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Sublethal Lead Exposure Alters Movement Behavior in Free-Ranging Golden Eagles
- 2017
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Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 51:10, s. 5729-5736
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Tidskriftsartikel (refereegranskat)abstract
- Lead poisoning of animals due to ingestion of fragments from lead-based ammunition in carcasses and offal of shot wildlife is acknowledged globally and raises great concerns about potential behavioral effects leading to increased mortality risks. Lead levels in blood were correlated with progress of the moose hunting season. Based on analyses of tracking data, we found that even sublethal lead concentrations in blood (25 ppb, wet weight), can likely negatively affect movement behavior (flight height and movement rate) of free ranging scavenging Golden Eagles (Aquila chrysaetos). Lead levels in liver of recovered post-mortem analyzed eagles suggested that sublethal exposure increases the risk of mortality in eagles. Such adverse effects on animals are probably common worldwide and across species, where game hunting with lead-based ammunition is widespread. Our study highlights lead exposure as a considerably more serious threat to wildlife conservation than previously realized and suggests implementation of bans of lead ammunition for hunting.
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