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001-es BibID:BIBFORM083341
035-os BibID:(cikkazonosító)97
Első szerző:Eötvös Csaba Béla (ökológus)
Cím:Predation Pressure on Sentinel Insect Prey Along a Riverside Urbanization Gradient in Hungary / Eötvös Csaba Béla, Lövei Gábor L., Magura Tibor
Dátum:2020
ISSN:2075-4450
Megjegyzések:Urbanization is one of the most important global trends which causes habitat reduction and alteration which are, in turn, the main reasons for the welldocumented reduction in structural and functional diversity in urbanized environments. In contrast, effects on ecological mechanisms are less known. Predation is one of the most important ecological functions because of its communitystructuring effects. We studied six forest habitats along a riverside urbanization gradient in Szeged, a major city in southern Hungary, crossed by the river Tisza, to describe how extreme events (e.g., floods) as primary selective pressure act on adaptation in riparian habitats. We found a generally decreasing predation pressure from rural to urban habitats as predicted by the increasing disturbance hypothesis (higher predator abundances in rural than in urban habitats). The only predators that reacted differently to urbanization were ground active arthropods, where results conformed to the prediction of the intermediate disturbance hypothesis (higher abundance in moderately disturbed suburban habitats). We did not find any evidence that communities exposed to extreme flood events were preadapted to the effects of urbanization. The probable reason is that changes accompanied by urbanization are much faster than natural landscape change, so the communities cannot adapt to them.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
urban
rural
ecological function
predation
predation paradox
sentinel prey
caterpillar
arthropod
mammal
bird
Megjelenés:Insects. - 11 : 2 (2020), p. 1-14. -
További szerzők:Lövei Gábor L. Magura Tibor (1969-) (ökológus)
Pályázati támogatás:128008
OTKA
131459
OTKA
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DOI
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2.

001-es BibID:BIBFORM082787
035-os BibID:(cikkazonosító)e38886
Első szerző:Eötvös Csaba Béla (ökológus)
Cím:Ground beetles (Coleoptera: Carabidae) react differently to urbanization than other predator groups in a riparian forest in southern Hungary / Eötvös Csaba, Lövei Gábor L., Magura Tibor
Dátum:2019
ISSN:2603-3925
Megjegyzések:Urbanization is one of the most important processes shaping our environment, which causes habitat reduction and alteration which are, in turn, the main reasons for the reduced structural and functional diversity in urbanized environments. Predation is one of the most important ecological functions because of its community-structuring effects. Quantification of predation on invertebrate prey is difficult, because the attacks are mostly cryptic and it is rare when evidence is present. Using dummy prey, which is fixed to a surface, the marks left by predators allows us to identify them. Current evidence indicates that predation pressure is lower in urban than rural areas. According to the natural flow-regime paradigm, extreme events (e.g. floods) constitute a primary adaptive pressure in riparian habitats. We tested the validity of the paradigm in urbanized habitats. Our study site was in and around the city of Szeged (Hungary), along two urbanization gradients selected according to the Globenet protocol along the banks of the river Tisza and Maros. Data collection was conducted from April to October, 2014-2016. Both urbanization gradients included rural, suburban and urban areas, each characterised by an increase in the built up area (0%-25%-50%), intensity of forest management, and visitation rates by city residents. Overall 12672 dummy caterpillars ware placed, 6336 were on the ground level and 6336 on tree trunks. The dummy caterpillars (20 mm long, 3 mm thick) were made of light green plasticine, using a modified garlic press, fixed to the bark of trees or on a suitable surface on the ground with superglue, exposed for 24 h. The marks were identified using a hand-held magnifying glass (10 x). Overall the most active predator group was small mammals, followed by insects and birds. Urban predation activity on ground level, caused mainly by carabid beetles was significantly lower than the suburban or rural ones. Carabid predation pressure was higher in suburban than in rural habitats, while all other predator groups (other insects, birds and small mammals) had a decreasing trend towards urban habitats. This means, that all studied predator groups act according to the Gray's increasing disturbance hypothesis, while carabid beetles react to urbanization according to Connell's intermediate disturbance hypothesis. We found no evidence for the natural flow-regime paradigm along the examined urbanization gradients.
Tárgyszavak:Természettudományok Biológiai tudományok idézhető absztrakt
folyóiratcikk
urban
rural
ecosystem services
ecological function
predation
sentinel prey
caterpillar
Megjelenés:ARPHA Conference Abstracts. - 2 (2019), p. 1-2. -
További szerzők:Lövei Gábor L. Magura Tibor (1969-) (ökológus)
Pályázati támogatás:OTKA-128008
OTKA
Internet cím:Szerző által megadott URL
DOI
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3.

001-es BibID:BIBFORM075869
035-os BibID:(WoS)000449896300006 (Scopus)85052113180
Első szerző:Eötvös Csaba Béla (ökológus)
Cím:A meta-analysis indicates reduced predation pressure with increasing urbanization / Eötvös Csaba Béla, Magura Tibor, Lövei Gábor L.
Dátum:2018
ISSN:0169-2046
Megjegyzések:Urbanization is one of the most important global trends which causes habitat reduction and alteration which are, in turn, the main reasons for the reduced structural and functional diversity in urbanized environments. Predation is one of the most important ecological functions because of its community-structuring effects. According to previous studies effects of urbanization on predation rates appear inconsistent. Predator species are vulnerable to habitat alteration and loss caused by urbanization, therefore, we hypothesised that predation rate would decrease along the rural-urban gradient. To clarify the impact of urbanization on predation, we performed a meta-analysis on predation rates in rural vs. urban areas using published data of 25 studies. Predation rates on taxa other than birds were underrepresented, preventing an overall evaluation. Reported predation rates on birds were significantly higher in rural than in urban habitats.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Urban
Rural
Ecological function
Predation paradox
Predator relaxation
Predation proliferation
Megjelenés:Landscape And Urban Planning. - 180 (2018), p. 54-59. -
További szerzők:Magura Tibor (1969-) (ökológus) Lövei Gábor L.
Pályázati támogatás:SROP-4.2.2.B-15/1/KONV2015-0001
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Internet cím:DOI
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