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Query: "author" (Ju��ni�� ��etina Tanja) .

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Towards fine root identification key of common tree species
Tanja Mrak, Peter Železnik, Jožica Gričar, Hojka Kraigher, 2014

DiRROS - Published: 12.07.2017; Views: 1916; Downloads: 876
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Vpliv suše na drobne korenine dreves in ektomikorizo v gozdnih ekosistemih
Tanja Mrak, Hojka Kraigher, 2019

Abstract: Sušni stres sproži tako pri drobnih koreninah dreves kot pri ektomikoriznih glivah številne spremembe na različnih nivojih. Drevesa se branijo pred sušo z mehanizmi izogibanja in tolerance. Suša lahko vpliva na kolonizacijo z ektomikoriznimi glivami in na strukturo ektomikorizne združbe. Pomembno vlogo pri preživetju mladja ob suši imajo skupne micelijske mreže. Ob zmerni suši je kolonizacija z ektomikoriznimi glivami večja kot ob ekstremni suši, kar ima za drevo številne pozitivne učinke. V sušnih razmerah se pogosto še posebej poveča pogostnost ektomikorizne vrste Cenococcum geophilum Fr., ki omogoča, da drobne korenine ostanejo funkcionalne in takoj po končanem sušnem obdobju pričnejo z absorpcijo vode. V sušnih razmerah se poveča tvorba težko razgradljivih molekul v koreninah (lignin), prav tako pa se težko razgradljive molekule (melanin) tvorijo tudi pri ektomikorizni vrsti C. geophilum, kar prispeva h kopičenju težko razgradljivih organskih snovi v tleh.
Keywords: globalne spremembe, drobne korenine, mikorizne glive, prilagoditve, organska snov v tleh
DiRROS - Published: 29.11.2019; Views: 2212; Downloads: 938
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Cultural ecosystem services provided by the biodiversity of forest soils : a European review
Jurga Motiejunaite, Isabella Børja, Ivika Ostonen, Mark Bakker, Brynhildur Bjarnadottir, Ivano Brunner, Reda Iršenaite, Tanja Mrak, Edda Oddsdottir, Tarja Lehto, 2019

Abstract: Soil is one of the most species-rich habitats and plays a crucial role in the functioning of terrestrial ecosystems. It is acknowledged that soils and their biota deliver many ecosystem services. However, up to now, cultural ecosystem services (CES) provided by soil biodiversity remained virtually unknown. Here we present a multilingual and multisubject literature review on cultural benefits provided by belowground biota in European forests. We found 226 papers mentioning impact of soil biota on the cultural aspects of human life. According to the reviewed literature, soil organisms contribute to all CES. Impact on CES, as reflected in literature, was highest for fungi and lowest for microorganisms and mesofauna. Cultural benefits provided by soil biota clearly prevailed in the total of the reviewed references, but there were also negative effects mentioned in six CES. The same organism groups or even individual species may have negative impacts within one CES and at the same time act as an ecosystem service provider for another CES. The CES were found to be supported at several levels of ecosystem service provision: from single species to two or more functional/taxonomical groups and in some cases morphological diversity acted as a surrogate for species diversity. Impact of soil biota on CES may be both direct % by providing the benefits (or dis-benefits) and indirect through the use of the products or services obtained from these benefits. The CES from soil biota interacted among themselves and with other ES, but more than often, they did not create bundles, because there exist temporal fluctuations in value of CES and a time lag between direct and indirect benefits. Strong regionality was noted for most of CES underpinned by soil biota: the same organism group or species may have strong impact on CES (positive, negative or both) in some regions while no, minor or opposite effects in others. Contrarily to the CES based on landscapes, in the CES provided by soil biota distance between the ecosystem and its CES benefiting area is shorter (CES based on landscapes are used less by local people and more by visitors, meanwhile CES based on species or organism groups are used mainly by local people). Our review revealed the existence of a considerable amount of spatially fragmented and semantically rich information highlighting cultural values provided by forest soil biota in Europe.
Keywords: soil biota, forests, soil ecosystem services, Europe
DiRROS - Published: 20.02.2020; Views: 846; Downloads: 334
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