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001-es BibID:	BIBFORM114026
035-os BibID:	(cikkazonosító)e02609 (WoS)001064760200001 (Scopus)85168528645
Első szerző:	Erfanzadeh, Reza
Cím:	Effect of burning of evergreen savin juniper and herbaceous patches on soil : seed banks, chemical and biological properties / Reza Erfanzadeh, Ali Ansari, Mohammad Jafari, Péter Török
Dátum:	2023
ISSN:	2351-9894
Megjegyzések:	The coniferous shrub species Juniperus sabina (savin) is widespread in mountainous regions of Eurasia. The species produces large amounts of fire-prone plant mass in its habitats. The aim of this study was to assess the effect that burning of savin shrubs has on the soil seed bank (SSB), the microbial respiration and the amount of organic matter under its canopy. In each of three sampling areas, four individuals of savin were randomly selected. Under each of these individuals and on adjacent herbaceous control patches, soil samples were taken from 0 to 5 cm and 5-10 cm depths for SSB, biological and chemical analyses. The sampling was repeated after burning the canopy. We found that the immediate effects of burning on the SSB and on the biological and chemical soil parameters were significantly negative. In particular, SSB density, magnitude of microbial respiration and amount of organic matter were significantly decreased after savin canopy burning in 0-5 cm depth, while these changes were less pronounced on the burned herbaceous patches. Hence the restoration of gaps created by burning savin cannot rely on the SSB. Furthermore, alkalization of the soil and decreased soil quality caused by savin burning might hamper the vegetation recovery even in the medium to long run.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Carbon cycle Fire ecology Grassland ecology Natural hazards Woody plants
Megjelenés:	Global Ecology and Conservation. - 46 (2023), p. 1-15. -
További szerzők:	Ansari, Ali Jafari, Mohammad Török Péter (1979-) (biológus-ökológus)
Pályázati támogatás:	KKP 144068 OTKA K 137573 OTKA
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001-es BibID:	BIBFORM104970
035-os BibID:	(cikkazonosító)106762 (WOS)000848341700004 (Scopus)85135990086
Első szerző:	Ghasempour, Misagh
Cím:	Fire effects on soil seed banks under different woody plant species in Mazandaran province, Iran / Misagh Ghasempour, Reza Erfanzadeh, Péter Török
Dátum:	2022
ISSN:	0925-8574 1872-6992
Megjegyzések:	Soil seed banks play a major role in the post-fire regeneration of semi-arid mountain grasslands. Plant species present before fire can determine the soil seed bank (SSB) characteristics in fire-prone ecosystems. However, it remains unclear how the density and species composition of the SSB under the canopy cover of specific shrub species may be affected by fire. Therefore, we designed a study to test the effects of prescribed burning on the viable SSBs under the canopies of two shrub species: Berberis integerrima (with open canopies) and Onobrychis cornuta (with dense canopies). We selected 20 study sites that included separate patches of the two shrub species and nearby herbaceous patches as control. Soil sampling was carried out pre- and post-burning of shrub canopies and the control patch. Soil samples were collected at two depths: 0-5 cm and 5-10 cm, and transported to the greenhouse for germination experiments. The results showed that canopy fire of shrubs decreased SSB density and species richness. However, the effects of shrub burning on SSB were species-specific and these reductions were more pronounced for canopy burning of O. cornuta than for B. integerrima. Total SSB densities decreased by 61% for B. integerrima and 71% for O. cornuta after canopy fire at soil depth of 0-5 cm. At soil depth of 5-10 cm, total SSB density decreased by 45% under O. cornuta after canopy fire, while canopy fire of B. integerrima did not affect SSB density. Herbaceous patch burning had no statistically significant effects on SSB density at soil depths of 0-5 cm and 5-10 cm. The comparison of quantitative and qualitative similarity indices between pre- and postfire species composition of shrub canopy showed that the statistically significant effect of B. integerrima burning on SSB composition was less pronounced compared with O. cornuta. This study indicated that seeds stored within the soil under certain shrub species are at a high risk of mortality during fire. Thus, successful post-fire recovery does not rely on the seed bank reservoir under these shrubs.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Fire adaptation Fire management Germination Heat shock Physical dormancy
Megjelenés:	Ecological Engineering. - 183 (2022), p. 1-10. -
További szerzők:	Erfanzadeh, Reza Török Péter (1979-) (biológus-ökológus)
Pályázati támogatás:	NKFIH-K-119225 OTKA NKFIH-K-137573 OTKA
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001-es BibID:	BIBFORM118221
035-os BibID:	(cikkazonosító)108901 (WoS)001152827800001 (Scopus)85183500222
Első szerző:	Hazhir, Shadi
Cím:	Effects of livestock grazing on soil seed banks vary between regions with different climates / Shadi Hazhir, Reza Erfanzadeh, Hassan Ghelichnia, Bahar S. Razavi, Péter Török
Dátum:	2024
ISSN:	0167-8809
Megjegyzések:	The influence of grazing on soil seed bank (SSB) characteristics determines the management of rangelands in different climates. Here we studied the responses of SSBs to livestock grazing in three regions with different climates - arid, semiarid and subhumid - in northern Iran. In each region 30 pairwise SSB samples were collected on 1 m2 plots, 15 in intensely grazed areas and 15 in ungrazed areas. The total SSB densities, their diversity and species richness and the densities of functional groups were compared between the grazed and ungrazed plots and between the climatic regions. Both climate and grazing as well as their interaction affected SSB characteristics. Although the results of the non-metric multidimensional scaling (NoS) showed noticeable differences in SSB species composition between grazed and ungrazed plots in all three regions, the magnitude of the grazing effect on the SSB was different between climatic regions. In total, 119 species germinated from the soil samples: 33 species in semiarid, 39 species in arid and 61 species in subhumid samples. The highest total SSB density, diversity (Shannon index) and richness were found in subhumid climate with an average of 138.90 seeds/m2, H = 2.27 and 17.83 species/sample, respectively. In ungrazed areas the average SSB density was 26.60 seeds/m2, 46.06 seeds/m2 and 195.90 seeds/m2 in arid, semiarid and subhumid climate, respectively. In grazed areas the corresponding figures were 12.40 seeds/m2, 7.00 seeds/m2 and 110.40 seeds/m2. Averages of SSB diversity in ungrazed areas were 1.24, 1.60 and 2.42 in arid, semiarid and subhumid climates, respectively, as compared to 1.27, 0.97 and 2.20 in grazed areas. The averages SSB richness in ungrazed areas were 5.21 species/sample, 7.54 species/sample and 21.25 species/sample in arid, semiarid and subhumid climate, respectively, whereas in grazed areas 4.00 species/sample, 2.86 species/sample and 16.15 species/sample were found on average. Overall, intensive grazing was linked to lower SSB characteristics in all three climatic regions, but the size of the effect differed between the climatic regions. Thus, we concluded that the impact of grazing on SSB density, diversity and richness is climate-dependent. Hence, the climatic conditions have to be considered when evaluating the effects of grazing on soil seed banks.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Climatic conditions Exclosure Diversity Herbivory
Megjelenés:	Agriculture Ecosystems & Environment. - 364 (2024), p. 1-8. -
További szerzők:	Erfanzadeh, Reza Ghelichnia, Hassan Razavi, Bahar S. Török Péter (1979-) (biológus-ökológus)
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