Aquatic Ecosystem Research Trends by George H. Nairne

By George H. Nairne

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Tripathi RD, Rai UN, Gupta M, Yunus M, Chandra P (1995). Cadmium transport in submerged macrophyte Ceratophyllum demersum L. in presence of various metabolic inhibitors and calcium channel blockers. Chemosphere 31(7), 3783–3791. , G. Thiébaut, M. Trémolières, S. Muller, (2000). A model for assessing water chemistry by using aquatic bryophyte assemblages in north-eastern France. Verhandlungen des Internationales Verein für Limnologie 27, 807-810. , Palm R. (1998). Canonical variables of aquatic bryophyte combinations for predicting water trophic level.

Altica lythri Dawn, a Chrysomelidae with phytophagous larva and adults, has been observed in some sites in France on Ludwigia sp. In 2005, two sites of dense beds of Ludwigia grandiflora of the Marais d'Orx, a wellcolonized wetland in southwest France, we observed many traces of consumption by this coleopteran. Laboratory surveys have shown important consumption by larvae and adults [49]. On a large scale, such insects are not efficient biological control agents, but it is possible that their consumption contributed to the long-term naturalisation of Ludwigia in France.

This method was tested only in the laboratory. 5. Ecological Restoration Changes in management practices, especially those with the potential to directly impact the river, are important for helping manage exotic macrophytes. This includes practices such as maintaining and enhancing the condition of riparian vegetation and storm water and nutrient management. The use of nutrient inactivation for the control of aquatic vascular plants is still in the research and development phase. Reduction of nutrients entering the river or in the ponds is important in the fight against exotic macrophytes species as these species grow best in high nutrient waters.

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