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Iskalni niz: "avtor" (Hojka Kraigher) .

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How beech provenance affects the structure of secondary xylem, leaf traits, and the ectomycorrhizal community under optimal growth conditions
Tanja Mrak, Jožica Gričar, Tina Unuk Nahberger, Gregor Božič, Luka Krajnc, Peter Prislan, Domen Arnič, Tom Levanič, Hojka Kraigher, 2024, izvirni znanstveni članek

Povzetek: Beyond growth parameters and drought tolerance, comparatively little is known about the functioning of different beech (Fagus sylvatica L.) provenances. We investigated properties of leaves, stem secondary xylem, and ectomycorrhiza (ECM), and explored their interdependencies to identify the best performing beech provenance in optimal growth conditions. The study was conducted on 23-year-old trees in a provenance trial. The investigated provenances originated from Atlantic (Belgium—BE), Alpine (Italy—IT, Slovenia—SI), and continental climates (the Czech Republic—CZ). A significant effect of provenance was observed for stem vessel diameters and conductive area, as well as for foliar %C, δ13C, δ15N, and δ18O. δ13C as a proxy of intrinsic water use efficiency (iWUE) showed that the highest iWUE was achieved in BE provenance. Individuals with a better iWUE had wider growth rings regardless of provenance. Better iWUE was associated with lower specific leaf area (SLA). ECM community composition and diversity indices did not differ significantly among the provenances. Specific ECM taxa were associated with individuals with high SLA, δ13C, δ15N, and δ18O. In optimal growth conditions with no stress events, BE is a promising provenance due to an efficient water conducting system with high vessel diameters and conductive area, and high iWUE, while Alpine provenances showed an adaptation of their water conducting system to freezing conditions at their original locations. Integrating findings from different compartments improves our understanding of functioning of different beech provenances.
Ključne besede: Fagus sylvatica, provenance trial, stable isotopes, specific leaf area, xylem vessels, ectomycorrhizal fungi
Objavljeno v DiRROS: 19.04.2024; Ogledov: 42; Prenosov: 15
.pdf Celotno besedilo (2,11 MB)
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European genetic resources conservation in a rapidly changing world : three existential challenges for the crop, forest and animal domains in the 21st century
François Lefévre, Danijela Bojkovski, Magda Bou Dagher Kharrat, Michele Bozzano, Eléonore Charvolin-Lemaire, Sipke Joost Hiemstra, Hojka Kraigher, Denis Laloë, Gwendal Restoux, Suzanne Sharrock, Enrico Sturaro, Theo J. L. van Hintum, Marjana Westergren, Nigel Maxted, 2024, izvirni znanstveni članek

Povzetek: Even though genetic resources represent a fundamental reservoir of options to achieve sustainable development goals in a changing world, they are overlooked in the policy agenda and severely threatened. The conservation of genetic resources relies on complementary in situ and ex situ approaches appropriately designed for each type of organism. Environmental and socioeconomic changes raise new challenges and opportunities for sustainable use and conservation of genetic resources. Aiming at a more integrated and adaptive approach, European scientists and genetic resources managers with long experience in the agricultural crop, animal and forestry domains joined their expertise to address three critical challenges: (1) how to adapt genetic resources conservation strategies to climate change, (2) how to promote in situ conservation strategies and (3) how can genetic resources conservation contribute to and benefit from agroecological systems. We present here 31 evidence-based statements and 88 key recommendations elaborated around these questions for policymakers, conservation actors and the scientific community. We anticipate that stakeholders in other genetic resources domains and biodiversity conservation actors across the globe will have interest in these crosscutting and multi-actor recommendations, which support several biodiversity conservation policies and practices.
Ključne besede: agroecology, climate change, in situ conservation, multi-actor engagement, policy
Objavljeno v DiRROS: 11.03.2024; Ogledov: 138; Prenosov: 58
.pdf Celotno besedilo (666,43 KB)
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Perspektive obnove slovenskih gozdov v času podnebnih in družbenih sprememb
Boris Rantaša, Franc Perko, Gregor Božič, Marjana Westergren, Primož Simončič, Hojka Kraigher, 2023, strokovni članek

Povzetek: Trajnostno, sonaravno in večnamensko gospodarjenje s slovenskimi gozdovi je omogočilo ohranjeno biotsko raznovrstnost, ohranjen prilagoditveni potencial ter velik povprečni prirastek in lesno zalogo. Za trajnostno zagotavljanje funkcij gozdov bo potrebno prilagajanje na spreminjajoče se podnebne in družbene razmere. Osrednji ukrep prilagajanja gozdov na podnebne spremembe je povečevanje pestrosti, tudi genetske. Praktično vsi področni strateški, zakonodajni ter operativni dokumenti na nacionalni in evropski ravni prepoznavajo in vsebujejo pomen ohranjanja gozdnih genskih virov in obnove ter nege gozda za trajnostni razvoj in zagotavljanje funkcij gozdov. Gospodarjenje z gozdovi bo treba nadgraditi z ukrepi, ki vključujejo aktiven pristop pri obnovi in negi gozda s čim širšo paleto vrstno in genetsko raznolikih sadik gozdnih drevesnih vrst. V obdobju 2023–2026 bo za obnovo gozdov in semenarsko ter drevesničarsko dejavnost na letni ravni potencialno namenjenih pribl. pet milijonov evrov javnih sredstev. Za obnovo in nego gozda bo nujno zagotoviti stabilno in fleksibilno financiranje zagotavljanja gozdnega reprodukcijskega materiala ter izvedbo obnove gozda in razvoja panoge. Avtorji poudarjajo tudi pomen sodelovanja in skupnega nastopa različnih deležnikov v celotni verigi gozdnega reprodukcijskega materiala.
Ključne besede: obnova gozdov, podnebne spremembe, družbene spremembe, zakonodaja, strategije, finance, Slovenija
Objavljeno v DiRROS: 09.01.2024; Ogledov: 233; Prenosov: 86
.pdf Celotno besedilo (408,22 KB)

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Delovanje programa EUFORGEN v letih 2010-2014 : tehnične smernice za ohranjanje in rabo genskih virov : Slovenija
Hojka Kraigher, 2013, predgovor, uvodnik, spremna beseda

Ključne besede: genski viri, drevesne vrste, tehnične smernice
Objavljeno v DiRROS: 20.12.2023; Ogledov: 240; Prenosov: 60
.pdf Celotno besedilo (52,04 KB)

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Delovanje programa EUFORGEN v letih 2010-2014 : tehnične smernice za ohranjanje in rabo genskih virov : Slovenija
Hojka Kraigher, 2012, predgovor, uvodnik, spremna beseda

Ključne besede: genski viri, drevesne vrste, tehnične smernice
Objavljeno v DiRROS: 20.12.2023; Ogledov: 214; Prenosov: 58
.pdf Celotno besedilo (45,26 KB)

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