Sukzession von Arthropoden in verbrannten Kiefernforsten

Schaefer, Matthias

doi:10.1007/bf02770953

Cited by 12 publications

(1 citation statement)

References 8 publications

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“…Seven species have been recorded for the first time for the arachnofauna of North Rhine-Westphalia: According to STAUDT (2009), the rare Dictyna major is mainly distributed in northern Germany, for example in dune habitats (HEYDEMANN 1964, SCHULTZ & PLAISIER 1995 and dry grasslands (BOCHMANN 1941, MERKENS 2002. This species also seems to inhabit dry Pinus forests (SCHAEFER 1980, SIMON 1995.…”

Section: Discussionmentioning

confidence: 99%

Diversity and distribution of spiders (Arachnida: Araneae) in dry ecosystems of North Rhine-Westphalia (Germany)

Buchholz¹,

Kreuels²

2009

aramit

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The present study provides a robust data set for ecological planning and conservation of dry ecosystems in western Germany in general and North Rhine-Westphalia in particular. We summarised all available data from recent publications that dealt with spiders in dry ecosystems of North Rhine-Westphalia. Additionally, so far unpublished results of a detailed investigation regarding spiders in sand habitats of the Westphalian Bay that was conducted between 2006 and 2008 are presented. The analysis focussed on the habitat types according to Annex I of the EU Habitats Directive and related habitats. The investigation areas were scattered in the federal state of North Rhine-Westphalia. The data set comprised a total of 84436 individuals from 371 species and 28 families. Overall, an endangerment status is assigned to 68 species. Of these, 12 spiders are in imminent danger of becoming extinct. Two species, Erigonoplus globipes and Meioneta simplicitarsis, are believed to be extinct in North Rhine-Westphalia. Seven species (Dictyna major, Mastigusa arietina, Micaria formicaria, Styloctetor romanus, Thanatus striatus, Theridion uhligi and Xysticus ferrugineus) are new to the arachnofauna of North Rhine-Westphalia

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Section: Discussionmentioning

confidence: 99%

Diversity and distribution of spiders (Arachnida: Araneae) in dry ecosystems of North Rhine-Westphalia (Germany)

Buchholz¹,

Kreuels²

2009

aramit

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The protective function of the compact silk nest of social Stegodyphus spiders (Araneae, Eresidae)

Seibt¹,

Wickler²

1990

Oecologia

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This study investigates the suggested protective function of the compact silken nest of two species of social Stegodyphus spiders (S. dumicola and S. mimosarum), as a possible ultimate factor for their sociogenesis. Being inhabitants of African dry thornbush country, these spiders are endangered by overheating and desiccation. In the laboratory, both species were found to avoid temperatures >40° C. In the field, temperature in the nest between 7:00 and 21:00 h tends to be higher than air-temperature outside, and between 13:00 and 15:00 h even tends to exceed 40° C. The nest thus is of no value in temperature regulation. Nor is it effective in protecting the spiders from desiccation: Both species have a body water content of 65.2±3.8% and are extremely desiccation resistant; they survived 9 days at 37°C in an exciccator with PO, with a daily average % liveweight reduction of 4.94(±1.1). In the field, relative humidity inside the nest between 11:00 and 19:00 h tends to be lower than that of the air outside. Inspection of burnt areas showed that the nest does not protect the spiders from bushfire. The nest does protect from wind, hail, and direct sun-radiation; but available natural retreats, or a simple silken shield, or the funnel-shaped silk tube inhabited by solitary Stegodyphus, have the same effect.

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The ecological importance of spiders in forest ecosystems, a literature review

Nyffeler

1982

Anz. Schadlingskde., Pflanzenschutz, Umweltschutz

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Sukzession von Arthropoden in verbrannten Kiefernforsten

Cited by 12 publications

References 8 publications

Diversity and distribution of spiders (Arachnida: Araneae) in dry ecosystems of North Rhine-Westphalia (Germany)

Diversity and distribution of spiders (Arachnida: Araneae) in dry ecosystems of North Rhine-Westphalia (Germany)

The protective function of the compact silk nest of social Stegodyphus spiders (Araneae, Eresidae)

The ecological importance of spiders in forest ecosystems, a literature review

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