Early growth of Scots pine, European larch and common oak at the young age on post-fire area located in the Sława Śląska Forest District (SW Poland)

The long-term forecasts predict that global warming will increase frequency and area of forest fires. Apart from economic losses resulting from a reduction of wood volume and annual increments of trees, the post-fire areas requiring the reforestation are enlarging considerably.            The present study aimed at the comparison of growth parameters of Scots pine, European larch and common oak seedlings growing on post-fire forest area with those growing in the control forest site established after clear cutting which was not enveloped by fire. We hypothesized that differences in growth traits of seedlings growing on post-fire area or in the control would depend on the species-specific ecological requirements. Among three study species Scots pine was selected to be the most suitable for planting on burnt area taking into account its growth traits and reforestation success.            Scots pine and European larch seedlings showed a greater thickness at root collar and pine had also a greater height on burnt area than in the control. Common oak responded inversely, it grew better in the control conditions compared with the burnt area. The pine grade of slenderness was similar in both treatments. Larch and oak reduced their grade of slenderness growing on post-fire area.Our results supported the hypothesis that the responses of the study trees to the burnt area conditions were determined by the species-dependent traits. The post-fire environment was the most favourable for light-demanding, pioneer pine and larch, but it was disadvantageous for late-successional, more conservative oak. Scots pine together with European larch are recommended to be planted on the burnt area to restore relatively fast the forest ecosystem. At the beginning of reforestation these species can play a role of pioneer crop and later will be able to become the dominant species together with less flammable broadleaved trees in the converted stands

Adaptation of seedling growth to the altitude: a case of the Norway spruce from the polish Sudety mountains

Seedlings of five Norway spruce [Picea abies (L.) Karst.] populations originating from different altitudes in the massif of Snieznik Klodzki in the Sudety Mountains (Poland) were grown in the greenhouse. Height, root length, and weight of root, shoot, needles and bud, as well as biomass allocation were studied. A good correlation of seedling traits and the altitude of mother stands was found. This indicates a rather good ecological adaptation of these, probably introduced populations. Some ecological and silvicultural aspects of the results are discussed.[fr] Les plantes de cinq populations de l'épicéa commun [Picea abies (L.) Karst.] provenant des différentes altitudes du massif de Snieznik Klodzki dans les Sudètes (une chaîne des montagnes en Pologne) ont été cultivées dans la serre. Leurs paramètres suivants ont été analysés: la hauteur, la longueur des racines, le poids frais et le poids sec des racines, des tiges, des aiguilles, des bourgeons et l'allocation de la biomasse. La haute corrélation a été notée entre les paramètres des plantes et l'altitude des stations des arbres ayant été les semenciers des graines. Ce résultat montre une plutôt bonne adaptation écologique de ces populations, probablement introduites dans le massif de Snieznik Klodzki. Les aspects écologiques et les conséquences de l'adaptation de l'épicéa commun aux conditions montagneuses pour la sylviculture sont discutés. [es] Plántulas de cinco poblaciones de abeto rojo [Picea abies (L.) Karst.] procedentes de diferente altitud en el macizo de Snieznik Klodzki, en los Montes Sudetes, (Polonia) se cultivaron en invernadero. Se han analizado los parámetros siguientes: altura y longitud de las raíces, pesos fresco y seco de raíces, tallos, hojas y yemas, así como la distribución de la biomasa. Como resultado se obtuvo una correlación alta entre los parámetros de las plántidas y la altitud de las estaciones donde se colectaron las semillas. Esto indica una adaptación relativamente buena de esas poblaciones, probablemente introducidas. Finalmente se discuten algunos aspectos ecológicos y de silvicultura

The use of drones during mass events

The concept of a mass event has been defined by the law on mass event security. The use of drones to monitor events involves numerous benefits. Surveillance provided by means of drones is particularly beneficial as far as large open areas are concerned. Unmanned aerial vehicles (UAVs) alert one to any issues in the crowd

Ex situ germination of European acorns: data from 93 batches of 12 Quercus species

8 p.We provide data on seedlot germination potential?a key trait related to regeneration?of 12 oak species. Germination was tested at the University of Granada following international protocols with 8985 acorns from 93 batches and 16 countries across Europe. Data on germination probability, acorn origin, mass, and moisture content measured on another 4544 acorns are available at https://doi.org/10.30827/Digibug.87318. Associated metadata are available at https://metadata-afs.nancy.inra.fr/geonetwork/srv/fre/catalog.search#/metadata/a742c6d8-bc37-4ca2-8b81-2447c5a8858d.Ministerio de Ciencia e InnovaciónUniversidad de GranadaJunta de AndalucíaMinisterio de Ciencia, Innovación y UniversidadesFEDE

Monitoring udatności nasadzeń jodły pospolitej (Abies alba Mill.) w Karkonoskim Parku Narodowym =Monitoring of success performance of the Abies alba artificial regeneration in the Karkonosze National Park

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Practical Implications of Different Phenotypic and Molecular Responses of Evergreen Conifer and Broadleaf Deciduous Forest Tree Species to Regulated Water Deficit in a Container Nursery

Recent climatic changes have resulted in an increased frequency and prolonged periods of drought and strained water resources affecting plant production. We explored the possibility of reducing irrigation in a container nursery and studied the growth responses of seedlings of four economically important forest trees: broadleaf deciduous angiosperms Fagus sylvatica L., Quercus petraea (Matt.) Liebl., and evergreen conifers Abies alba Mill. and Pinus sylvestris L. We also studied markers of water stress including modifications of biomass allocation, leaf anatomy, proline accumulation, and expression of selected genes. Growth of the broadleaved deciduous species was more sensitive to the reduced water supply than that of conifers. Remarkably, growth of the shade tolerant Abies was not affected. Adjustment of biomass allocations was strongest in P. sylvestris, with a remarkable increase in allocation to roots. In response to water deficit both deciduous species accumulated proline in leaves and produced leaves with shorter palisade cells, reduced vascular tissues, and smaller conduit diameters. These responses did not occur in conifers. Relative transcript abundance of a gene encoding the Zn-finger protein in Q. petraea and a gene encoding the pore calcium channel protein 1 in A. alba increased as water deficit increased. Our study shows major differences between functional groups in response to irrigation, with seedlings of evergreen conifers having higher tolerance than the deciduous species. This suggests that major water savings could be achieved by adjusting irrigation regime to functional group or species requirements

Northern Provenances of Silver Fir Differ with Acclimation to Contrasting Light Regimes

Phenotypic differentiation of Abies alba was identified among selected provenances originating from the northern edge of this species’ natural geographic range. We posited that although the seed sources of the study populations were not geographically distant, progenies would differ with respect to growth, needle pigment concentration, and values of photochemical parameters in response to contrasting light conditions. Potted seedlings of six provenances were grown for two seasons under low light (LL, 40% of full irradiance) or high light (HL, 100% of full irradiance). The results showed that the provenances differed in diameter at root collar (DRC) and in relative growth rates of height (RGR). Seedlings grown in full light had a greater mean value of DRC than those in LL. LL increased total needle chlorophyll (Chltot) and carotenoid concentrations compared with HL, and Chltot was modified by the provenance of the seedlings. The provenance “Syców”, localized at the northern limit of the species range, showed the lowest value of maximal electron transfer rate (ETRmax) and lower values of growth parameters compared with the other study provenances. Relative growth rate, Chltot, and non-photochemical quenching of fluorescence (NPQ) were correlated with some climatic characteristics of seed stands and formed clusters indicating the local adaptation of the study populations. These results provide evidence of low intraspecific A. alba differentiation in terms of growth dynamics, photochemical capacity, and tolerance to different light regimes. The intraspecific diversity found in our study among the northern lead populations could be, however, important for the natural expansion of this species further north and for the selection of provenances to be used in the programme of the A. alba restoration in the Sudety Mountains, southern Poland, where decline of this species has been observed

Deficit in macroelements and variation in potential quantum yield of psii in needles of silver fir (Abies alba Mill.) seedlings growing under different light conditions =Niedobór makroelementtów i zróżnicowanie maksymalnej wydajności fotosyntetycznej fotosystemu II w igłach sadzonek jodłypospolitej (Abies alba Mill.) rosnących w zróżnicowanych warunkach świetlnych

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