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001-es BibID:	BIBFORM112611
035-os BibID:	(Scopus)85161600632 (WoS)001001082700001
Első szerző:	Bak Henrietta
Cím:	Effects of habitat management on newly found populations of the endangered weed, Mummenhoffia alliacea (Brassicaceae) / Henrietta Bak, Réka Fekete, Péter Török, Kristof Süveges, V. Attila Molnár
Dátum:	2023
ISSN:	0043-1737
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk germination mowing river embankment roadside salt tolerance Thlaspi alliaceum
Megjelenés:	Weed Research. - 63 : 4 (2023), p. 237-245. -
További szerzők:	Fekete Réka (1993-) (biológus) Török Péter (1979-) (biológus-ökológus) Süveges Kristóf (1994-) Molnár V. Attila (1969-) (biológus, botanikus)
Pályázati támogatás:	K 137573 NKFIH KKP 144068 NKFIH PD 143425 NKFIH K 132573 NKFIH
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM079560
035-os BibID:	(cikkazonosító)876 (WoS)000474251700001 (Scopus)85069540391
Első szerző:	Kelemen András (biológus-ökológus)
Cím:	Density-dependent plant-plant interactions triggered by grazing / András Kelemen, Csaba Tölgyesi, Orsolya Valkó, Balázs Deák, Tamás Miglécz, Réka Fekete, Nóra Balogh, Péter Török, Béla Tóthmérész
Dátum:	2019
ISSN:	1664-462X
Megjegyzések:	Plant species performance in rangelands highly depends on the effect of grazing and also on the occurrence of unpalatable benefactor species that can act as biotic refuges protecting neighboring plants from herbivores. The balance between facilitation and competition may changes with the benefactor density. Despite the high number of studies on the role of biotic refuges, the density dependent effects of unpalatable herbaceous plants on the performance of other species, and on the habitat heterogeneity of rangelands are still unclear. Therefore, we performed a study to test the following hypotheses: (i) Performances of understory species follow a humped-back relationship along the density gradient of the unpalatable benefactor species. (ii) Small-scale heterogeneity of the vegetation decreases with increasing benefactor density. We studied meadow steppes with medium intensity cattle grazing in Hungary. We surveyed understory species' performance (number of flowering shoots and cover scores) along the density gradient of a common, native unpalatable species (Althaea officinalis). Our findings supported both hypotheses. We found unimodal relationship between the benefactor cover and both the flowering success and richness of understory species. Moreover, small-scale heterogeneity declined with increasing benefactor cover. In this study we detected a humped-back pattern of facilitation along the density gradient of an herbaceous benefactor in pastures. Indeed, this pattern was predictable based on such conceptual models like ?consumer pressure-abiotic stress model', ?humped-back model', ?intermediate disturbance hypothesis' and ?disturbance heterogeneity model'; but until now the validity of these relationships has not been demonstrated for herbaceous species. By the demonstration of this effect between herbaceous species we can better forecast the responses of grasslands to changes in management.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk biotic refuge cattle grazing competition density-gradient disturbance facilitation habitat heterogeneity
Megjelenés:	Frontiers in Plant Science. - 10 (2019), 1-6. -
További szerzők:	Tölgyesi Csaba (1984-) (ökológus) Valkó Orsolya (1985-) (biológus) Deák Balázs (1978-) (biológus) Miglécz Tamás (1986-) (biológus ökológus) Fekete Réka (1993-) (biológus) Balogh Nóra (1990-) (okleveles környezetkutató) Török Péter (1979-) (biológus-ökológus) Tóthmérész Béla (1960-) (ökológus)
Pályázati támogatás:	NKFI KH 126477 egyéb NKFI K 116239 egyéb NKFI FK 124404 egyéb NKFI KH 126476 egyéb NKFI KH 130338 egyéb NKFI PD 124548 egyéb NKFIH K 119225 egyéb
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM064222
Első szerző:	Molnár V. Attila (biológus, botanikus)
Cím:	Seed of the threatened annual legume, Astragalus contortuplicatus, can survive over 130 years of dry storage / Attila Molnár V., Judit Sonkoly, Ádám Lovas-Kiss, Réka Fekete, Attila Takács, Lajos Somlyay, Péter Török
Dátum:	2015
ISSN:	0032-7786
Megjegyzések:	Long-term seed viability is of crucial importance for short-lived species, since persistent seed banks can buffer the fluctuations in the establishment of plants from year to year. Temporarily flooded habitats are an unpredictable environment for plants, and for some species the only chance they have of surviving is the formation of persistent seed banks. Astragalus contortuplicatus is an annual species of periodically flooded habitats and is considered an endangered species in Hungary. Altogether 1993 seeds of this species were tested in a germination experiment: 1200 were freshly harvested and 793 were collected from herbarium specimens of various ages. Seed viability was tested using the germination method. The freshly harvested seeds were used for selecting the best out of seven frequently used dormancy-breaking methods for this species. The highest percentage of germination was recorded for the combined treatment of scarification and light. Thus, this method was used to test the viability of the seeds collected from herbarium specimens. The oldest seeds that germinated were 131 years old. Until now there are no records of seeds of herbaceous legumes germinating that are more than 100 years old. This record is the 9th oldest of all the literature records of viable seeds originating from biological collections. All the seeds that germinated developed into healthy, fertile plants, the seeds of which also readily germinated. Fitted linear regression showed a significant negative relationship between seed age and percentage germination. Based on this linear regression the calculated theoretical maximum viability is 309 years. Our results suggest that seeds of A. contortuplicatus stored in collections can be successfully used in this species' reintroduction for conservation purpose, to areas in which the plants were collected.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban biological collections Fabaceae hard seeds herbarium Hungary physical dormancy scarification persistence seed longevity seed storage
Megjelenés:	Preslia. - 87 : 3 (2015), p. 319-328. -
További szerzők:	Sonkoly Judit (1989-) (biológus) Lovas-Kiss Ádám (1991-) (biológus, botanikus) Fekete Réka (1993-) (biológus) Takács Attila (1989-) (biológus, botanikus) Somlyay Lajos Török Péter (1979-) (biológus-ökológus)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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