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Ključne besede: sonaravno gospodarjenje, klimatske spremembe, trajnostno gospodarjenje z gozdovi, sonaravno gospodarjenje z gozdovi, jelka, Abies alba Mill
Objavljeno v DiRROS: 01.02.2025; Ogledov: 64; Prenosov: 36
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Ključne besede: sonaravno gospodarjenje, klimatske spremembe, trajnostno gospodarjenje z gozdovi, sonaravno gospodarjenje z gozdovi
Objavljeno v DiRROS: 31.01.2025; Ogledov: 76; Prenosov: 35
Celotno besedilo (2,82 MB)
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Ključne besede: sonaravno gospodarjenje, klimatske spremembe, trajnostno gospodarjenje z gozdovi, sonaravno gospodarjenje z gozdovi
Objavljeno v DiRROS: 31.01.2025; Ogledov: 69; Prenosov: 31
Celotno besedilo (2,67 MB)
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Povzetek: Mitigating loss of genetic diversity is a major global biodiversity challenge1,2,3,4. To meet recent international commitments to maintain genetic diversity within species5,6, we need to understand relationships between threats, conservation management and genetic diversity change. Here we conduct a global analysis of genetic diversity change via meta-analysis of all available temporal measures of genetic diversity from more than three decades of research. We show that within-population genetic diversity is being lost over timescales likely to have been impacted by human activities, and that some conservation actions may mitigate this loss. Our dataset includes 628 species (animals, plants, fungi and chromists) across all terrestrial and most marine realms on Earth. Threats impacted two-thirds of the populations that we analysed, and less than half of the populations analysed received conservation management. Genetic diversity loss occurs globally and is a realistic prediction for many species, especially birds and mammals, in the face of threats such as land use change, disease, abiotic natural phenomena and harvesting or harassment. Conservation strategies designed to improve environmental conditions, increase population growth rates and introduce new individuals (for example, restoring connectivity or performing translocations) may maintain or even increase genetic diversity. Our findings underscore the urgent need for active, genetically informed conservation interventions to halt genetic diversity loss.
Ključne besede: global meta-analysis, genetic diversity
Objavljeno v DiRROS: 31.01.2025; Ogledov: 109; Prenosov: 44
Celotno besedilo (9,31 MB)
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Povzetek: The ectomycorrhizal symbionts of silver fir have rarely been analyzed and identified, so little is known about their diversity and distribution. The aim of this study was (1) to analyze the diversity of ectomycorrhizal fungal species in three geographically distinct forest stands of Abies alba and (2) to demonstrate the high temporal variability of the ectomycorrhizal community over two consecutive growing seasons using repeated monthly sampling. Root samples were taken every month during two growing seasons in three silver fir-dominated forest stands. The ectomycorrhizal root tips were first assigned to a morphotype based on morphological characteristics and then identified by sequencing the internal transcribed spacer region. Alpha and beta diversity differed significantly between all three study sites, with the most diverse and even ectomycorrhizal community described in plot Jelovški boršt. The diversity indices over the growing season were different at two of the three study sites, supporting the idea of a fluctuation of ectomycorrhizal taxa during the growing seasons of the two consecutive years. While significant temporal variability was only confirmed for certain ectomycorrhizal taxa, there were no significant changes in the ectomycorrhizal community in general. Thus, we confirmed the high spatial but low temporal variability of the ectomycorrhizal community associated with silver fir.
Ključne besede: ectomycorrhizal community, spatiotemporal variation, silver fir, fungal diversity, forest, root-associated fungi
Objavljeno v DiRROS: 31.01.2025; Ogledov: 86; Prenosov: 42
Celotno besedilo (1,39 MB)
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