Anglies apykaita vidutinio klimato agroekosistemose

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Harnessing the biodiversity value of Central and Eastern European farmland

A large proportion of European biodiversity today depends on habitat provided by low-intensity farming practices, yet this resource is declining as European agriculture intensifies. Within the European Union, particularly the central and eastern new member states have retained relatively large areas of species-rich farmland, but despite increased investment in nature conservation here in recent years, farmland biodiversity trends appear to be worsening. Although the high biodiversity value of Central and Eastern European farmland has long been reported, the amount of research in the international literature focused on farmland biodiversity in this region remains comparatively tiny, and measures within the EU Common Agricultural Policy are relatively poorly adapted to support it. In this opinion study, we argue that, 10years after the accession of the first eastern EU new member states, the continued under-representation of the low-intensity farmland in Central and Eastern Europe in the international literature and EU policy is impeding the development of sound, evidence-based conservation interventions. The biodiversity benefits for Europe of existing low-intensity farmland, particularly in the central and eastern states, should be harnessed before they are lost. Instead of waiting for species-rich farmland to further decline, targeted research and monitoring to create locally appropriate conservation strategies for these habitats is needed now.Peer reviewe

Bringing the margin to the focus: 10 challenges for riparian vegetation science and management

Riparian zones are the paragon of transitional ecosystems, providing critical habitat and ecosystem services that are especially threatened by global change. Following consultation with experts, 10 key challenges were identified to be addressed for riparian vegetation science and management improvement: (1) Create a distinct scientific community by establishing stronger bridges between disciplines; (2) Make riparian vegetation more visible and appreciated in society and policies; (3) Improve knowledge regarding biodiversity—ecosystem functioning links; (4) Manage spatial scale and context-based issues; (5) Improve knowledge on social dimensions of riparian vegetation; (6) Anticipate responses to emergent issues and future trajectories; (7) Enhance tools to quantify and prioritize ecosystem services; (8) Improve numerical modeling and simulation tools; (9) Calibrate methods and increase data availability for better indicators and monitoring practices and transferability; and (10) Undertake scientific validation of best management practices. These challenges are discussed and critiqued here, to guide future research into riparian vegetation

Ecophysiological adaptation of southern escapes in Lithuania

Vytauto Didžiojo universitetasŽemės ūkio akademij

Gausiažiedžių svidrių (Lolium multiflorum lamk) pasėlio morfologinės struktūros, sėklų derliaus bei kokybės ir sėjos laiko koreliacija

Vytauto Didžiojo universitetasŽemės ūkio akademij

Seed germination inhibition by hogweed heracleum sosnowskyi

Vytauto Didžiojo universitetasŽemės ūkio akademij

Mažai paplitusių ir tradicinių ankštinių žolių ir jų mišinių produktyvumo bei įtakos dirvožemio mikrobiologiniam aktyvumui tyrimai

Santr. anglBibliogr.: p. 512 (5 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Rytinio ožiarūčio (Galega Orientalis Lam.) žaliosios masės ir siloso kokybė

Santr. liet., anglBibliogr.: p. 74 (13 pavad.)Vytauto Didžiojo universitetasŽemės ūkio akademij

Fluorescence traits of invasive species in Lithuania

1 elektroninis optinis diskas (CD-ROM)Some worldwide invasive plant species spread successfully throughout natural and semi-natural habitats in Lithuania. Accordingly, measures have been strongly recommended to prevent the introduction of such species and their spreading to new areas, or to manage unwanted populations. The proliferation of invasive species abundancy in new environments indicates a good supply of resources at physiological levels, viz. photosynthesis. Therefore, the assessment of chlorophyll fluorescence as a non-invasive intrinsic investigation of photosynthesis can give detailed information and be applied for understanding of invasive species adaption to a new environment. The research was aimed at the evaluation of the fluorescence parameters of invasive plant species (Fallopia sachalinensis (F sach), Heracleum sosnovskyi (H sasn), Rumex confertus (R conf)), the indicators of their physiological acclimation to a new environment, by identifying traits that could explain their success in terms of invading new territories. Fluorescence gains were measured in situ at the different growth stages during the vegetation period of invasive species in 10 replications using a light-adapted pulse-amplitude modulation method. The main parameters of the photosynthetic system II (PSII), e.g., fluorescence yield (Fs) in the light and maximal fluorescence (Fms) during the light flash were recorded in and used to determine the quantum yield of electron transport (Y). Between investigated species significantly (p<0.000) higher means of Fs, the index of photosynthetic excitation in light, and Fms, the index of efficiency of PSII, were observed in light-adapted leaves of H sosn (412.7 and 399.32 μmol m-2 s-1) and F sach (399.32 and 1726.90 μmol m-2 s-1). [...]Vytauto Didžiojo universitetasŽemės ūkio akademij

Botanikos laboratorinių darbų sąsiuvinys : (augalų anatomija, morfologija) : metodinė priemonė agronomijos spec. studentams ; LŽŪA. Botanikos kat

Bibliogr. p.: 23 (2 pvad.)Vytauto Didžiojo universitetasŽemės ūkio akademij