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001-es BibID:	BIBFORM047008
Első szerző:	Horváth Roland (biológus-ökológus)
Cím:	Large and least isolated fragments preserve habitat specialist spiders best in dry sandy grasslands in Hungary / Roland Horváth, Tibor Magura, Csaba Szinetár, János Eichardt, Béla Tóthmérész
Dátum:	2013
ISSN:	0960-3115
Megjegyzések:	The role of fragment size, isolation and habitat diversity in the conservation ofspider assemblages living in fragmented landscape were studied in dry sandy grasslands(East Hungary, Nyírség). Spiders were collected using pitfall traps at eight dry grasslandfragments from 2001 to 2009 from March to October fortnightly. We tested the rules ofisland biogeography, which suggest that the species richness increases with the size anddecreases with the isolation of fragments. The habitat diversity is an important factor forspecies richness, since large areas usually have more habitats; therefore, the number ofspecies may be higher in these areas. During the 9-year study period, altogether 10,544individuals belonging to 106 species were collected. Contradicting the classical theory, wefound a significant negative relationship between the total number of spider species and thegrassland size, while the ratio of sandy grassland specialist spider species increased withfragment size. The relationship between the ratio of generalist species and the fragmentsize was not significant. The overall species richness and the isolation of studied grasslandsdid not show a significant relationship. The ratio of sandy grassland specialist speciesdecreased, while the ratio of generalist species increased with the increasing of isolation.The habitat diversity did not show any effect on spider species richness. We concluded thatto conserve the habitat specialist species it is recommended to preserve the large and leastisolated grassland fragments, furthermore to increase the size of small fragments with therestoration of the adjacent croplands.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban Egészség- és Környezettudomány Doktori iskola
Megjelenés:	Biodiversity And Conservation. - 0 (2013), p. 0-0. -
További szerzők:	Magura Tibor (1969-) (ökológus) Szinetár Csaba Eichardt János Tóthmérész Béla (1960-) (ökológus)
Pályázati támogatás:	TÁMOP-4.2.1/B-09/1/KONV-2010-0007 TÁMOP Kvantitatív ökológiai kutatások TÁMOP-4.2.2/B-10/1-2010-0024 TÁMOP Juhász-Nagy Pál Doktori Iskola
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