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001-es BibID:BIBFORM073792
035-os BibID:(WOS)000440138400018 (Scopus)85050822898
Első szerző:Godó Laura (biológus, ökológus)
Cím:Ecosystem engineering by foxes is mediated by the landscape context : a case study from steppic burial mounds / Godó Laura, Tóthmérész Béla, Valkó Orsolya, Tóth Katalin, Kiss Réka, Radócz Szilvia, Kelemen András, Török Péter, Švamberková Eva, Deák Balázs
Dátum:2018
ISSN:2045-7758
Megjegyzések:In intensively used landscapes remnant grassland fragments are often restricted to places unsuitable for agricultural cultivation. Such refuges are the ancient burial mounds called 'kurgans', which are typical landscape elements of the Eurasian steppe and forest steppe zone. Due to their hill-like shape, loose soil structure and undisturbed status kurgans provide proper habitats for burrowing mammals. Accordingly, grassland vegetation on kurgans is often exposed to bioturbation, which can influence the habitat structure and plant species pool. In our study we explored the effect of fox burrows and landscape context on the habitat properties and vegetation composition of small landscape elements, using kurgans as model habitats. We surveyed the vegetation of fox burrows and that of the surrounding grassland on five kurgans situated in cleared landscapes surrounded by arable lands, and five kurgans in complex landscapes surrounded by grazed grasslands. We recorded the percentage cover of vascular plants, the amount of litter and soil moisture content in twelve 0.5m?0.5m plots per kurgan, in a total of 120 plots. We found that foxes considerably transformed habitat conditions and created microhabitats by changing the soil nutrient availability and reducing total vegetation cover and litter. Several grassland specialist species, mostly grasses (Agropyron cristatum, Elymus hispidus and Stipa capillata) established in the newly created microhabitats, although the cover of noxious species was also considerable. We found that landscape context influenced the sort of species which could establish on kurgans by affecting the available species pool and soil moisture. Our results revealed that foxes act as ecosystem engineers on kurgans by transforming abiotic and biotic conditions by burrowing. Their engineering activity maintains disturbance-dependent components of dry grasslands and increases local environmental heterogeneity.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
biodiversity
disturbance
fragmentation
isolation
kurgan
sacred sites
steppe
weeds
Megjelenés:Ecology and Evolution. - 8 : 14 (2018), p. 7044-7054. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Valkó Orsolya (1985-) (biológus) Tóth Katalin (1988-) (biológus) Kiss Réka (1990-) (biológus, ökológus) Radócz Szilvia (1988-) (biológus) Kelemen András (1986-) (biológus-ökológus) Török Péter (1979-) (biológus-ökológus) Švamberková Eva (1989-) (Biológus) Deák Balázs (1978-) (biológus)
Pályázati támogatás:OTKA-111807
OTKA
115627
OTKA
OTKA-116639
OTKA
116200
OTKA
NKFI FK 124404
Egyéb
NKFI KH 126476
Egyéb
NKFI KH 126477
Egyéb
NKFI K 119225
Egyéb
Bolyai János Ösztöndíj
MTA
ÚNKP-17-4-III-DE-160
Egyéb
ÚNKP-17-4-III-DE-151
Egyéb
Internet cím:DOI
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2.

001-es BibID:BIBFORM079671
035-os BibID:(WOS)000399738700040 (Scopus)85015177805
Első szerző:Kelemen András (biológus-ökológus)
Cím:New aspects of grassland recovery in old-fields revealed by trait-based analyses of perennial-crop-mediated succession / Kelemen András, Tóthmérész Béla, Valkó Orsolya, Miglécz Tamás, Deák Balázs, Török Péter
Dátum:2017
ISSN:2045-7758
Megjegyzések:Classical old-field succession studies focused on vegetation changes after the abandonment of annual croplands or on succession after the elimination of cultivated crops. Perennial-crop-mediated succession, where fields are initially covered by perennial crops, reveals alternative aspects of old-field succession theories. We tested the validity of classical theories of old-field succession for perennial-crop-mediated succession. We formulated the following hypotheses: (1) functional diversity increases with increasing field age; (2) resource acquisition versus conservation trade-off shifts toward conservation at community level during the succession; (3) the importance of spatial and temporal seed dispersal decreases during the succession; and (4) competitiveness and stress-tolerance increases and ruderality decreases at community level during the succession. We studied functional diversity, trait distributions and plant strategies in differently aged old-fields using chronosequence method. We found increasing functional richness and functional divergence, but also unchanged or decreasing functional evenness. We detected a shift from resource acquisition to resource conservation strategy of communities during the succession. The role of spatial and temporal seed dispersal was found to be important not only at the initial but also at latter successional stages. We found an increasing stress-tolerance and a decreasing ruderality during succession, while the competitiveness remained unchanged at the community level. Despite the markedly different starting conditions, we found that classical and perennial-crop-mediated old-field successions have some similarities regarding the changes of functional diversity, resource acquisition versus conservation trade-off, and seed dispersal strategies. However, we revealed also the subsequent differences. The competitive character of communities remained stable during the succession; hence, the initial stages of perennial-crop-mediated succession can be similar to the middle stages of classical old-field succession. Moreover, the occupied functional niche space and differentiation were larger in the older stages, but resources were not effectively utilized within this space, suggesting that the stabilization of the vegetation requires more time.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
alfalfa
C-S-R strategies
functional diversity
leaf traits
resource acquisition
seed traits
Megjelenés:Ecology and Evolution. - 7 : 7 (2017), p. 2432-2440. -
További szerzők:Tóthmérész Béla (1960-) (ökológus) Valkó Orsolya (1985-) (biológus) Miglécz Tamás (1986-) (biológus ökológus) Deák Balázs (1978-) (biológus) Török Péter (1979-) (biológus-ökológus)
Pályázati támogatás:OTKA PD 116200
OTKA
OTKA K 116639
OTKA
OTKA PD111807
OTKA
PD 115627
Egyéb
NKFIH K 119225
Egyéb
NTP-NFTÖ-16-0107
Egyéb
Internet cím:Szerző által megadott URL
DOI
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3.

001-es BibID:BIBFORM104982
035-os BibID:(WOS)000678053900001 (Scopus)85111087152
Első szerző:Shackelford, Nancy
Cím:Drivers of seedling establishment success in dryland restoration efforts / Nancy Shackelford, ... Péter Török, ... Katharine L. Suding
Dátum:2021
ISSN:2397-334X
Megjegyzések:Restoration of degraded drylands is urgently needed to mitigate climate change, reverse desertification and secure livelihoods for the two billion people who live in these areas. Bold global targets have been set for dryland restoration to restore millions of hectares of degraded land. These targets have been questioned as overly ambitious, but without a global evaluation of successes and failures it is impossible to gauge feasibility. Here we examine restoration seeding outcomes across 174 sites on six continents, encompassing 594,065 observations of 671 plant species. Our findings suggest reasons for optimism. Seeding had a positive impact on species presence: in almost a third of all treatments, 100% of species seeded were growing at first monitoring. However, dryland restoration is risky: 17% of projects failed, with no establishment of any seeded species, and consistent declines were found in seeded species as projects matured. Across projects, higher seeding rates and larger seed sizes resulted in a greater probability of recruitment, with further influences on species success including site aridity, taxonomic identity and species life form. Our findings suggest that investigations examining these predictive factors will yield more effective and informed restoration decision-making. The seeding of native species is critical to the success of dryland restoration efforts. Here the authors evaluate success of seeding establishment at 174 sites on six continents, finding that some sites had nearly 100% of species successfully recruit, while 17% of sites had zero seedling success.
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Nature Ecology & Evolution. - 5 : 9 (2021), p. 1283-1290. -
További szerzők:Török Péter (1979-) (biológus-ökológus) Suding, Katharine
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4.

001-es BibID:BIBFORM070894
035-os BibID:(WOS)000418824800063 (Scopus)85034268856
Első szerző:Sonkoly Judit (biológus)
Cím:Do large-seeded herbs have a small range size? The seed mass-distribution range trade-off hypothesis / Sonkoly Judit, Deák Balázs, Valkó Orsolya, Molnár V. Attila, Tóthmérész Béla, Török Péter
Dátum:2017
Megjegyzések:We aimed to introduce and test the "seed mass-distribution range trade-off" hypothesis, that is, that range size is negatively related to seed mass due to the generally better dispersal ability of smaller seeds. Studying the effects of environmental factors on the seed mass and range size of species, we also aimed to identify habitats where species may be at risk and need extra conservation effort to avoid local extinctions. We collected data for seed mass, global range size, and indicators for environmental factors of the habitat for 1,600 species of the Pannonian Ecoregion (Central Europe) from the literature. We tested the relationship between species' seed mass, range size, and indicator values for soil moisture, light intensity, and nutrient supply. We found that seed mass is negatively correlated with range size; thus, a seed mass?distribution range trade-off was validated based on the studied large species pool. We found increasing seed mass with decreasing light intensity and increasing nutrient availability, but decreasing seed mass with increasing soil moisture. Range size increased with increasing soil moisture and nutrient supply, but decreased with increasing light intensity. Our results supported the hypothesis that there is a trade-off between seed mass and distribution range. We found that species of habitats characterized by low soil moisture and nutrient values but high light intensity values have small range size. This emphasizes that species of dry, infertile habitats, such as dry grasslands, could be more vulnerable to habitat fragmentation or degradation than species of wet and fertile habitats. The remarkably high number of species and the use of global distribution range in our study support our understanding of global biogeographic processes and patterns that are essential in defining conservation priorities.
ISBN:2045-7758
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
distribution area
light intensity
seed size
seed weight
soil fertility
soil moisture
Megjelenés:Ecology and Evolution. - 7 : 24 (2017), p. 11204-11212. -
További szerzők:Deák Balázs (1978-) (biológus) Valkó Orsolya (1985-) (biológus) Molnár V. Attila (1969-) (biológus, botanikus) Tóthmérész Béla (1960-) (ökológus) Török Péter (1979-) (biológus-ökológus)
Pályázati támogatás:K 119225
NKFIH
K 108992
OTKA
K 116639
OTKA
PD 115627
OTKA
PD 111807
OTKA
FK 124404
NKFI
ÚNKP-17- 4-III-DE-160
ÚNKP
ÚNKP-17-4-III-DE-151
ÚNKP
Internet cím:DOI
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5.

001-es BibID:BIBFORM074615
035-os BibID:(WOS)000449529800031 (Scopus)85054525879
Első szerző:Török Péter (biológus-ökológus)
Cím:Vegetation type and grazing intensity jointly shape grazing effects on grassland biodiversity / Török Péter, Penksza Károly, Tóth Edina, Kelemen András, Sonkoly Judit, Tóthmérész Béla
Dátum:2018
Megjegyzések:In the Palaearctic steppe zone, overgrazing was identified as one of the key drivers of declining grassland biodiversity, which underlines the necessity of the functional evaluation of increased grazing pressure on grassland vegetation. We tested the following hypotheses: (i) The effect of grazing intensity on species- and functional diversity is strongly dependent on grassland-type. (ii) The magnitude of diet selectivity of grazers decreases with increasing grazing intensity. (iii) Increasing grazing intensity increases evenness and functional evenness of the subjected grasslands. We analysed vegetation patterns in four types of grasslands (Dry alkali short-grass steppes, Dry loess steppes, Non-alkali wet and Alkali wet grasslands) along an intensity gradient of beef cattle grazing at 73 sites in Hungary. Species richness, Shannon diversity, evenness, and four leaf traits were analysed. We calculated community-weighted means for each single trait, and multi-trait functional richness, functional evenness, and divergence for all leaf traits. All species and functional diversity metrics were significantly affected by the grassland type, except leaf dry matter content. The effect of interaction 2between grazing intensity and grassland type was also significant for functional richness, functional evenness, community-weighted means of leaf area, and for species richness and evenness. An upward trend of specific leaf area was detected in all grasslands with the highest scores for the overgrazed sites, but the change was also grassland-type-dependent. The detected trend suggests that with increased intensity the overall selectivity of grazing decreased. We found that evenness was affected but functional evenness was not affected by grazing intensity. Functional evenness scores were more related to the grassland type than to changes in grazing intensity, and displayed a high variability. We stress that one-size-fits-all strategies cannot be recommended and actions should be fine-tuned at least at the level of grassland type.
ISBN:2045-7758
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
functional diversity
leaf traits
overgrazing
plant traits
steppe
prairie
Megjelenés:Ecology and Evolution. - 8 : 20 (2018), p. 10326-10335. -
További szerzők:Penksza Károly Tóth Edina (1990-) (biológus) Kelemen András (1986-) (biológus-ökológus) Sonkoly Judit (1989-) (biológus) Tóthmérész Béla (1960-) (ökológus)
Pályázati támogatás:NFKIH-K-119225
Egyéb
NFKIH-K-116639
Egyéb
NFKIH-K-125423
Egyéb
NFKIH-KH-126477
Egyéb
Internet cím:DOI
Intézményi repozitóriumban (DEA) tárolt változat
DOI
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