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Restoration of Scirpus lacustris and Scirpus maritimus stands in a former tidal area Clevering, O.A.; Van Gulik, W.J. M. (1997). Restoration of Scirpus lacustris and Scirpus maritimus stands in a former tidal area. Aquat. Bot. 55(4): 229-246. http://dx.doi.org/10.1016/S0304-3770(96)01087-X In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522

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Beschikbaar in	Auteurs
VLIZ: Non-open access 230722 [ aanvragen ]

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Trefwoorden

Behaviour > Feeding behaviour > Grazing Control > Erosion control Dimensions > Depth > Water depth Environmental effects Fauna > Aquatic organisms > Aquatic animals > Aquatic birds Flora > Aquatic organisms > Aquatic plants Properties > Physical properties > Density Protection > Environmental protection > Coastal zone management > Shore protection Restoration Soil fertility Structures > Hydraulic structures > Barrages > Dams Vegetation cover Bolboschoenus maritimus (L.) Palla [WoRMS] Marien/Kust; Brak water

Author keywords

shore protection; emergent macrophytes; re-introduction; soil fertility;water depth; plant density; waterfowl grazing

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Auteurs		Top
Clevering, O.A. Van Gulik, W.J. M.

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Abstract

After the damming of estuaries in the Netherlands, Scirpus lacustris L. and Scirpus maritimus L. stands deteriorated due to the reduction of tidal range. Experiments were conducted in the field to investigate the effects of soil fertility, water depth and waterfowl grazing on the establishment of both species in a non-tidal waterbody. Fertilisation using a slow-release fertiliser (pellets of 7.5 g Osmocote per plant, containing 17% N, 1.6% P2O5, and 8.7% K) did not affect dry matter production of either species. Scirpus lacustris became established in both shallow (5–15 cm) and moderately deep (30–40 cm) water, whereas S. maritimus only became well established in shallow water. A high plant density (12 plants m−2) had a negative effect on the growth of individual S. lacustris plants at both 5 and 30 cm water depth. Growth of individual plants of S. maritimus was negatively affected by a high plant density (20 plants m−2) at 5 cm water depth but not at 30 cm. Support of shoots, by wire-netting, increased total plant dry weight of S. lacustris but not that of S. maritimus. Summer grazing occurred mainly by mute swans (Cygnus olor L.). Grazing during three subsequent growing seasons resulted in the complete disappearance of S. lacustris. In contrast, a 3-year-old S. lacustris stand was able to recover after being grazed several times within 1 year. It was concluded that in former tidal areas Scirpus can be re-established by planting. Waterfowl grazing may, however, seriously limit growth of Scirpus.

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