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- dataset2023The GCMFEM program is intended to solve a self-adjoint BVP for the system of elliptic differential equations (4.10) with Neumann BC decribing collective nuclear model.
10 - dataset2023Duomenų rinkinys buvo gautas atlikus temperatūros ir santykinės drėgmės stebėjimus viename iš Lietuvos ūkių pusiau izoliuotame 244 vietų dėžinio tipo tvarte vasarą. Nustatyta, kad oro vėsinimo sistemos efektyvumas yra didesnis esant aukštesnei temperatūrai ir mažesniam santykiniam oro drėgnumui į karvidę patenkančiame ore. Mažesnės drėgmės vertės prisideda prie intensyvesnio temperatūros ir drėgmės indekso mažėjimo vėsinimo sistemai veikiant. Pateikti matematiniai modeliai yra naudingi įrankiai priimant sprendimus dėl vėsinimo sistemos veikimo modelių pasirinkimo, nes leidžia įvertinti vėsinimo efektyvumą, atsižvelgiant į išorinių veiksnių įtaką
19 5 29 3 - dataset2022The increasing disturbances in monocultures around the world are testimony to their instability under global change. Many studies have claimed that temporal stability of productivity increase with species richness, although the ecological fundaments have mainly been investigated through diversity experiments. To adequately manage forest ecosystems, it is necessary to have a comprehensive understanding of the effect of mixing species on the temporal stability of productivity and the way in which this it is influenced by climate conditions across large geographical areas. Here, we used a unique dataset of 261 stands combining pure and two-species mixtures of four relevant tree species over a wide range of climate conditions in Europe to examine the effect of species mixing on the level and temporal stability of productivity. Structural equation modelling was employed to further explore the direct and indirect influence of climate, overyielding, species asynchrony and additive effect (i.e. temporal stability expected from the species growth in monospecific stands) on temporal stability in mixed forests. We showed that by adding only one tree species to monocultures, the level (overyielding: +6%) and stability (temporal stability: +12%) of stand growth increased significantly. We identified the key effect of temperature on destabilizing stand growth, which may be mitigated by mixing species. We further confirmed asynchrony as the main driver of temporal stability in mixed stands, through both the additive effect and species interactions, which modify between-species asynchrony in mixtures in comparison to monocultures. Synthesis and applications. This study highlights the emergent properties associated with mixing two-species, which result in resource efficient and temporally stable production systems. We reveal the negative impact of mean temperature on temporal stability of forest productivity and how the stabilizing effect of mixing two species can counterbalance this impact. The overyielding and temporal stability of growth addressed in this paper are essential for ecosystem services closely linked with the level and rhythm of forest growth. Our results underline that mixing two species can be a realistic and effective nature-based climate solution, which could contribute towards meeting EU climate target policies.
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653 1973 769 310 69 529 40 194 - datasetVDU mokslo valdymo sistema VDU CRIS, 2021This dataset is the result of a survey conducted during the 2012-2016 COST Action FP1202 (MaP-FGR): Strengthening conservation: a key issue for adaptation of marginal/peripheral populations of forest trees to climate change in Europe. It contains the name, location and other relevant information of 577 forests that are considered as marginal of peripheral by forest experts. Information (as specified in the read-me file) includes among others: Genus, Species, Country, Name of marginal population, Latitude, Longitude, Elevation, Type of marginality, Silvicultural system, Protection status, Threat status, and genetic and phenotypic trait data availability. This dataset can be used to, e.g., test effects of marginality on biological and genetic traits, compare expert knowledge with statistics-based indicators, raise awareness of the importance of marginal populations for conservation and sustainable use.
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Boizou, Loic 15