Tenuiphantes zimmermanni (Bertkau, 1890) [plachetnatka Zimmermannova]

Kvadráty: 6666 5358 5152 6048 6544

	Nálezy podle období
	Linyphiidae	0-1900	1901-1950	1951-2000	2001-2021	∑
Tenuiphantes zimmermanni (Bertkau, 1890) Ohrožený			16×	5×	21×

Tenuiphantes zimmermanni (Bertkau, 1890)

České jméno	plachetnatka Zimmermannova
Stupeň ohrožení	Ohrožený
Nálezy	21 nálezů, 5 kvadrátů
První nález	1968, J. Buchar, Buchar 1989b; Růžička et al. 1989
Poslední nález	2008 , Vlastimil Růžička, Roman Mlejnek
Areál rozšíření	European [Boh.]
Fytogeografická oblast	Meso
Původnost stanovišť	climax
Vlhkost stanovišť	semi-humid, humid
Stratum	Ground layer
Osvětlení stanovišť	shaded
Hojnost výskytu	rare
Nadm. výška	350-650

Literatura

Spider (Araneae) communities of scree slopes in the Czech Republic

We assessed the effects of environmental factors on spider communities in screes (sloping mass of coarse rock fragments) of the Czech Republic, based on catches from 325 pitfall traps, exposed for 177–670 days, from 1984–2000. Bootstrap resampling was applied to test for fuzziness of the partitions in cluster analysis of the samples. Two distinct spider communities were identified. The first one was confined to sites where ice is formed and persists until late summer or over the whole year. This community consists of numerous relict spiders, such as Bathyphantes simillimus buchari Růžička 1988, Diplocentria bidentata (Emerton 1882) and Lepthyphantes tripartitus Miller & Svatoň 1978, possibly persisting in these cold screes from the early postglacial period. The other community included all other sites, irrespective of their environmental characteristics. Monte Carlo simulations were used to test the significance of environmental factors and their interactions on the studied communities. Ice formation near the traps and position of the traps within individual screes were the most significant factors, followed by the depth of the traps within the scree, diameter of stones forming the scree, and altitude. A marginally significant effect was found for organic content in the scree matter, whereas presence of trees and phytogeographical districts appeared non-significant. Our analyses support the view that spiders inhabiting cold screes in Central Europe belong to a unique relict community of species requiring cold and stable microclimate.