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Nutrient Dynamics and Retention in Land/Water Ecotones of by Harald Kühl, Johannes-Günter Kohl (auth.), A.

By Harald Kühl, Johannes-Günter Kohl (auth.), A. Hillbricht-Ilkowska, E. Pieczyńska (eds.)

Ecotones, or boundary zones among land and inland waters (such as lakes, streams and rivers), are the primary routes for shipping of natural topic and foodstuff throughout landscapes through actual and organic vectors. The ecotone is where of cumulation and transformation of in situ construction in addition to of allochthonous fabric from adjoining aquatic and terrestrial structures. The ecotype services as an enormous barrier or filter out for imperative foodstuff, similar to phosphorus and nitrogen, accountable for the eutrophication and degradation of floor waters. extensive wooded area slicing, agriculture, pollutants and financial institution legislation, urbanization and hydrotechnical buildings heavily endanger the ecotone structures and harm their protecting functionality. it is important to improve a systematic figuring out of the behaviour of phosphorus and nitrogen in those transitional boundary habitats. Such an realizing is critical for the rational safeguard, administration and recovery of ecotones hooked up with lakes and rivers. the significance of nutrient biking and retention is mentioned from the perspective of ecotone functionality, administration and reconstruction with a purpose to maintain its protecting position for water our bodies. a variety of varieties of land/water transitory zones are mentioned: wetlands, lake littoral structures, riparian zones of rivers, streams and brooks, the touch zones among groundwater and floor waters of lakes and rivers, air--water interfaces, and patch/ecotone constructions in watersheds.

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Additional info for Nutrient Dynamics and Retention in Land/Water Ecotones of Lowland, Temperate Lakes and Rivers

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From 1988 onwards submerged macrophyte stands continue to thrive, reducing the ammonium and nitrate concentrations in the water below detection levels. In July 1989 storage of Nand P in the macrophytes reached 86 % and 80 %, respectively. John, the dominant species in 1988 and 1989, acted as sink both for Nand P during spring and early summer, withdrawing up to ca 60 % of its Nand P content from the sediment. At the end of the year only part of the Nand P from the decayed macrophytes (ca 30 % of Nand 60 % of P) was recovered in the water phase of the ecosystem (chiefly in dissolved forms).

Elevated metal concentrations would not have been surprising since the Gooimeer is part of the River Rhine delta. The water level of the lake was monitored continuously in order to relate the occurrence and composition of epiphyton and metaphyton to the water depth of the littoral zone. The water level of shallow Gooimeer appears to be very variable (Fig. 3). Despite of short time fluctuations of more than 25 cm, the difference in the summer and winter water level is notable. The reed belt runs dry when the lake water depth at the measuring point drops below 40 cm (which occasionally happens in summer).

H. R. R. -L. Meijer & E. van Donk (eds), Biomanipulation - Tool for Water Management. Developments in Hydrobiology 61. Kluwer Academic Publishers, Dordrecht: 99-119. Reprinted from Hydrobiologia 200/201. Hanson, M. A. & M. G. Butler, 1990. Early responses of plankton and turbidity to biomanipulation in a shallow prairie lake. In R. D. Gulati, E. H. R. R. -L. Meijer & E. van Donk (eds), Biomanipulation - Tool for Water Management. Developments in Hydrobiology 61. Kluwer Academic Publishers, Dordrecht: 317-327.

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