ARACHNOLOGISCHE GESELLSCHAFT

Doi
10.30963/aramit6307
Author

Balkenhol B, Lübcke T & Reise BM

Year
2022
Title

The Great Raft Spider Dolomedes plantarius rediscovered in Saxony (Araneae: Pisauridae)

Title translated

Wiederfund der Großen Jagdspinne Dolomedes plantarius für Sachsen (Araneae: Pisauridae)

Issue

Heft 63

Pages
24-29
Abstract

Dolomedes plantarius has been rediscovered in Saxony (Germany) for the first time since its only previous finding in 1948. The new discoveries were made between 1996 and 2021 in northern Upper Lusatia by sweep netting in the marginal, emergent and floating vegetation around an extensively used swimming lake and three fish ponds. All ponds where the species was recorded are located in areas with several still-water bodies and are characterised by a structurally rich marginal or floating vegetation. The water bodies showed a high nutrient content and the swimming lake had a very low pH. As part of their management, the fish ponds are regularly drained in autumn. We suppose that after the ponds are refilled in spring D. plantarius recolonises from neighbouring ponds that retained their water.

Data package
Keywords

bathing lake, fish ponds, threatened species, Saxony, water management, water quality