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Role of macrophytes in structuring littoral habitats in the Vistula Lagoon (southern Baltic Sea)

Pawlikowski Krzysztof, Kornijów Ryszard

Oceanologia

2019

No. 61 (1)

26--37

The objective of the research conducted in the years 2011-2014 in the near-shore zone of the Vistula Lagoon was the verification of the hypothesis that in the coastal lagoon, similarly as in inland waters, habitat conditions can be substantially modified by macrophytic vegetation, depending on the represented life form and its abundance. The research was conducted in the zone of emergent plants (reed rush composed of Phragmites australis) and in the zone of submerged plants occurring as scattered patches of Potamogeton perfoliatus and Stuckenia pectinata. The hypothesis was supported only in the case of the reed rush chich substantially modified water insolation, temperature, and oxygenation, as well as the grain size composition of sediments, and concentration of organic matter contained in the sediments. Patches of submerged vegetation had insufficient surface area and were too scarcely overgrown by plants to considerably affect the habitat conditions and weaken the strong mechanical effect of waves and rate of water exchange between the littoral and open water zone.

Water soldier Stratiotes aloides L. (Hydrocharitaceae) as a substratum for macroinvertebrates in a shallow eutrophic lake

Tarkowska-Kukuryk Monika

Polish Journal of Ecology

2006

Vol. 54, nr 3

441-451

The importance of water soldier (Stratiotes aloides L.) as a colonization substratum for epiphytic and mining fauna has been investigated in the shallow, eutrophic lake in East Poland. Samples were taken in May, July and October in 2000-2001. Studies focused on abundance and species diversity of phytophilous fauna of Stratiotes aloides, in particular on the relation between epiphytic and mining organisms and their seasonal changes. The studied zoocenosis differed significantly in terms of density and taxa number. In all studied seasons fauna inhabiting Stratiotes aloides showed higher abundance and species diversity than mining invertebrates. Both zoocenosis were predominated by Chironomidae larvae. The percentage of midges in epiphytic fauna decreased slightly during vegetation period, the mining fauna showed the opposite pattern. Epiphytic Chironomidae were dominated by four taxa (Dicrotendipes sp., Glyptotendipes sp., Paratanytarsus austriacus, Psectrodadius sp.). The mining fauna was represented mainly by Glyptotendipes sp. larvae. Density and biomass of epiphytic fauna showed the positive correlation with water soldier biomass.