Összesen 4 találat.


001-es BibID:BIBFORM073124
Első szerző:Fekete Réka (biológus)
Cím:A hitchhiker from the beach: the spread of the maritime halophyte Cochlearia danica along salted continental roads / Fekete R., Mesterházy A., Valkó O., Molnár V. A.
Megjegyzések:The increase in road networks facilitates the dispersal of many species of plants along roadsides.In these special habitats, the use of deicing salt can provide suitable habitat conditions for theestablishment of stress-tolerant halophytes. This study investigates the spread of an alienhalophyte Cochlearia danica in continental Europe. This species is native to the Atlantic shoresof Europe, has already spread in many countries along roadsides and was recently discovered inHungary. We performed a literature review to track the European spread of this species, andinvestigated the Hungarian occurrences in detail. Then we determined the ability of this species toadapt to local soil conditions by means of soil analyses and germination tests using 19 differentNaCl concentrations and alkaline soils. To estimate the rate of spread, we estimated the size of thefour Hungarian populations in 2016 and 2017, and at the same time we measured the number offlowering stems, number of flowers in an inflorescence, number of seeds per fruit and seed mass.Cochlearia danica is recorded growing along roadsides in eight countries in continental Europe.Literature data indicate a rapid spread of this species along European roads, of 62?65 km/year.In Hungary this species is recorded at four roadside localities characterized by a high soil saltcontent. The relationship between NaCl concentration and percentage germination followeda sigmoidal curve. Germination tests revealed a significant negative effect of NaCl concentrationon germination above 0.5% NaCl, but germination occurred even on extremely saline substrateswith a 2% NaCl concentration. The area of the largest Hungarian population decreased by morethan 99% and that of the second largest population increased by more than 30% between 2016 and2017. Even though this species can adapt to high salinity in the soil, these rapid and markedchanges in population size indicate that the population dynamics of this species may depend oninteractions between the amount of local precipitation and soil type. Our study indicates that weshould expect further occurrences of C. danica along roads.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
deicing salt
plant invasion
roadside verges
seed dispersal
Megjelenés:Preslia. - 90 : 1 (2018), p. 23-37. -
További szerzők:Mesterházy Attila Valkó Orsolya (1985-) (biológus) Molnár V. Attila (1969-) (biológus, botanikus)
Pályázati támogatás:OTKA-108992
NKFI KH 126476
NKFI FK 124404
Internet cím:Szerző által megadott URL
Intézményi repozitóriumban (DEA) tárolt változat


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
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
hard seeds
physical dormancy
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


001-es BibID:BIBFORM104209
035-os BibID:(WoS)000868675200002 (Scopus)85140643258
Első szerző:Süveges Kristóf
Cím:Native and alien poplar plantations are important habitats for terrestrial orchids / Süveges, Kristóf; Vincze, Orsolya; Löki, Viktor; Lovas-Kiss, Ádám; Takács, Attila; Fekete, Réka; Tüdősné Budai, Júlia; Molnár V., Attila
Megjegyzések:Poplar monocultures are some of the most common short-rotation coppices. While they are most often considered of low environmental value, they have recently gained recognition for their multifaceted role in ecological engineering, such as carbon sinks, soil remediators or green energy producers. Nonetheless, the biodiversity of poplar plantations remains little known and largely overlooked. Here we conducted a systematic botanical survey of 232 poplar plantations within the Pannonian ecoregion (central Europe) in order to assess their plant diversity, with particular focus on terrestrial orchids. Our results highlight that almost 60% of poplar monocultures harbour terrestrial orchids, some with several thousand specimens. Overall, we documented the occurrence of 15 species of terrestrial orchids in the surveyed plantations, including taxa with limited distributions and a threatened conservation status. For instance, we report numerous new populations of Epipactis bugacenis and E. tallosii in poplar plantations, suggesting that the majority of these taxa occur in poplar monocultures within Hungary. We analysed and highlight soil chemistry and plantation characteristics that predict the occurrence and species richness of terrestrial orchids in poplar monocultures. The probability of orchids being present is highest in older and larger poplar plantations, characterized by high total organicmatter content and high soil pH.We conclude that plantations of native and alien poplar harbour valuable plant communities, including terrestrial orchids and other vascular plants of significant conservation importance. Using the knowledge generated here, we recommend delaying or partial harvest of poplar plantations to increase their conservation potential.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
anthropogenic habitats
biodiversity conservation
poplar monocultures
Megjelenés:Preslia. - 94 : 3 (2022), p. 429-445. -
További szerzők:Vincze Orsolya (1988-) (biológus) Löki Viktor (1989-) (biológus) Lovas-Kiss Ádám (1991-) (biológus, botanikus) Takács Attila Fekete Réka (1993-) (biológus) Budai Júlia (1986-) (okleveles környezetkutató) Molnár V. Attila (1969-) (biológus, botanikus)
Pályázati támogatás:K-132573
Internet cím:Szerző által megadott URL
Intézményi repozitóriumban (DEA) tárolt változat


001-es BibID:BIBFORM047882
Első szerző:Takács Attila (biológus, botanikus)
Cím:Key environmental variables affecting the distribution of Elatine hungarica in the Pannonian Basin / Attila Takács, András Schmotzer, Gusztáv Jakab, Tamás Deli, Attila Mesterházy, Gergely Király, Balázs András Lukács, Boglárka Balázs, Ranko Perić, Pavol Eliáš jun., Gábor Sramkó, Jácint Tökölyi, Attila Molnár V.
Megjegyzések:Elatina hungarica Moesz is a small wetland ephemerophyte that occurs and is classified as extinct, data deficient or a very rare and endangered taxon in most countries in eastern and central Europe. Based on literature and herbarium data, supplemented by 160 field records collected between 1998 and 2011, we present the currently known distribution of this species in the Pannonian Basin, which mostly but not exclusively includes Hungary. Within the Pannonian Basin this species is distributed throughout Hungary, with sporadic occurences in Romania, Sebia and Slovakia. The temporal distribution of floristic records is very uneven. This species was recorded only in 27 years during the last 213 years (1798-2011). When examining presence/absence data for most of the 20th century, we found a significant correlation between the number of records of this species in a given year and two key, but not independent, environmental variables: rainfall and the extent of the area inundated in the same year. In the more intensively documented period between 1998 and 2010, there is only a significant correelation between the numbers of records of this species and the extent of flooding, which is because there is a delay in the effect of an increase in rainfall. The peak occurence of records in the 1940s and 1950s is associated with extensive rice production in Hungary. Today, most records are for agricultural fields that are subject to flooding and becoming temporary wetlands. The comparison of recent and past distributions of E. hungarica reveals a consistent and marked regional difference; whereas this species is not rare along the Tisza river and its tributaries, it is markedly scattered in similar habitats near the Danube.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
rice weeds
temporary ponds
Megjelenés:Preslia. - 85 (2013), p. 193-207. -
További szerzők:Schmotzer András Jakab Gusztáv (1975- ) (paleontológus) Deli Tamás Mesterházy Attila Király Gergely Lukács Balázs András (1979-) (ökológus) Balázs Boglárka (1985-) (geográfus) Perić, Ranko Eliáš, Pavol (jun.) Sramkó Gábor (1981-) (biológus) Tökölyi Jácint (1984-) (biológus) Molnár V. Attila (1969-) (biológus, botanikus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
Szerző által megadott URL
Rekordok letöltése1