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The ecology of Ruppia-dominated communities in western Europe: I. Distribution of Ruppia representatives in relation to their autecology
Verhoeven, J.T.A. (1979). The ecology of Ruppia-dominated communities in western Europe: I. Distribution of Ruppia representatives in relation to their autecology. Aquat. Bot. 16: 197-267. hdl.handle.net/10.1016/0304-3770(79)90064-0
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770, more
Peer reviewed article  

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Keywords
    Aquatic plants; Ruppia Linnaeus, 1753 [WoRMS]; Brackish water

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  • Verhoeven, J.T.A.

Abstract
    This paper contains the first of three parts of a study of the ecology of Ruppia-dominated communities. After introductory remarks on the problematic subdivision of the genus Ruppia and on its distribution in the world, a detailed picture is given of the distribution of the European Ruppia taxa in three study areas at different latitudes (Finland, The Netherlands, S. France), in relation to important environmental factors, e.g. salinity, size and permanence of the water body, substrate type. Ruppia cirrhosa (Petagna) Grande appeared to be characteristic for medium and large permanent water bodies with an annual mean salinity between 2 and 35‰ Cl- (total range 1.5–60‰ Cl-). Ruppia maritima var. maritima L. proved to occur mainly in small and medium-size permanent water bodies with an annual mean salinity between 0.5 and 8‰ Cl- (total range 0.3–15‰ Cl-), whereas R. maritima var. brevirostris (Agardh) Aschers. Graebn. proved to be characteristic for temporary waters of various sizes (salinity range 1–42‰ Cl-). An examination of the ionic content of the water of 8 Ruppia habitats in The Netherlands revealed that the minor components of salinity (K+, Ca2+, Mg2+, SO42-) showed considerable variations, resulting in conspicuous differences in proportional ionic compositions in different waters.

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