O. Merkl szerk.: Folia Entomologica Hungarica 66. (Budapest, 2005)

Shore vegetation (outside of reeds): As HUFNAGEL et al. (1999) pointed out, the shore vegetation has a marked effect on the composition of water-bug assemblages. Outside reeds or other macrophytes, along the shores we find treeless sections, and mostly Populus or Salix stands of various age and density, respectively. Angler clubs may have planted decoration trees like Platanus, these may give deep-shaded sections along their harbours or channels. RESULTS Habitat types around the lake Habitats themselves and the various habitat characteristics relevant to the aquatic and semiaquatic species, may vary from locality to locality, and depend on the season, water level as well as changes in water quality and the living world of the lake during longer periods. As an example: at Keszthely, two sites, a few kilometres from each other, represent entirely different histories. The estuary of the stream Csókakő-patak is a 10 m wide channel constructed in the shore and maintained by a local angling society (sorted into category G, see below). The shore of the channel is steep, with many small landing jetties. Waves from the open lake never reach the site. The bed is dredged in the middle every 1-2 years, but the fauna and the submersed vegetation have not changed markedly during the past two decades. The other site, Fenékpuszta, was a 20-30 m wide open shore bay in the natural reedbelt of the flat shore, and was used as a beach by local inhabitants and wild campers in the 70ies. As the area became protected and fenced, reeds started to grow in, but some anglers and a local ornithological station kept a narrowing channel in the reeds. Now the site is a little bay (5x10 m) entirely surrounded by reeds, housing four boats and grown in by submersed vegetation. A 50 m long, 1-2 m wide channel is leading to the open water through the dense reeds. Waves from the open water reach this site in strong wind through the reedbelt. This locality had to be sorted into different types (K versus I) at different times. Below, the habitats recognised during our collectings are listed. Some sites, as mentioned before, have changed considerably during the decades or from one year to the other. Artificial habitats A. Ship harbour (e.g. Siófok). High embankment, concrete shore, high above deep water, exposed to open water, normally with hairweeds (few specimens were captured here).