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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 Intézményi repozitóriumban (DEA) tárolt változat
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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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