Abstract
Consumption by carnivorous birds was estimated for the Sylt-Rømø tidal inlet in the northern part of the Wadden Sea, as well as the subarea Königshafen, a small, tidal bay. The bird community of the Sylt-Rømø Wadden Sea was dominated by Dunlin (35% of all birds counted), Eider (9%), Oystercatcher (8%), Knot (8%), and Shelduck (7%). The community in the Königshafen was dominated by Eider (20%), Knot (17%), Bar-tailed Godwit (17%), Dunlin (13%), and Oystercatcher (8%). Annual consumption was estimated at 3.4 g AFDW · m−2 · year−1 for the entire Sylt-Rømø Wadden Sea and 19.2 g AFDW · m−2 · year−1 for the Königshafen. Restricting the calculations to the intertidal area resulted in a consumption of 8.7 g AFDW · m−2 · year−1 for the Sylt-Rømø Wadden Sea and 17.6 g AFDW · m−2 · year−1 for the Königshafen. In the two areas, consumption was dominated by the Eider with 37% and 60% of the total consumption, respectively. In comparison to the western parts of the Wadden Sea the seasonal pattern of consumption as well as species composition differed, most probably as an effect of different climatic conditions, whereas annual consumption on intertidal flats seems to be in the same order of magnitude. On average, 15–25% of the mean annual macrozoobenthic biomass seems to be taken by carnivorous birds in the Wadden Sea, which is in the same order of magnitude as in other northern temperate estuarine areas.
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Aschoff, J. & Pohl, H., 1970. Der Ruheumsatz von Vögeln als Funktion der Tageszeit und der Körpergröße. —J. Orn.111, 38–47.
Asmus, H., 1982. Field measurements on respiration and secondary production of a benthic community in the northern Wadden Sea.—Neth. J. Sea Res.16, 403–413.
Asmus, H., 1987., Secondary production of an intertidal mussel bed community related to its storage and turnover compartments.—Mar. Ecol. Prog. Ser.39, 251–266.
Austen, I., 1994. The surficial sediments of Königshafen—variations over 50 years.—Helgoländer Meeresunters.48, 163–171.
Backhaus, J., Hartke, D. & Hübner, U., 1995. Hydrodynamisches, und thermodynamisches Modell des Sylter Wattenmeeres. SWAP Teilprojekt 4.1a. Abschlußbericht. Hamburg, 104 pp.
Baird, D. & Milne, H., 1981. Energy flow in the Ythan estuary, Aberdeenshire, Scotland.—Estuar. coast. Shelf Sci.13, 455–472.
Baird, D., Evans, P. R., Milne, H. & Pienkowski, M. W., 1985. Utilization by shorebirds of benthic invertebrate production in intertidal areas.—Oceanogr. mar. Biol.23, 573–597.
Baird, D., McGlade, J. M. & Ulanowicz, R. E., 1991. The comparative ecology of six marine ecosystems. —Phil. Trans. R. Soc. Lond. (B)333 15–29.
Baird, D. & Ulanowicz, R. E., 1993. Comparative study on the trophic structure, cycling and ecosystem properties of four tidal estuaries.—Mar. Ecol. Prog. Ser.99, 221–237.
Banse, K., 1995. Antarctic marine top predators revisited: homeotherms do not leak much CO2 to the air.—Polar Biol.15, 93–104.
Beukema, J. J., 1981. Quantitative data on the benthos of the Wadden Sea proper. In: Invertebrates of the Wadden Sea. Ed. by N. Dankers, H. Kühl & W. J. Wolff Balkema, Rotterdam, 134–142. (Rep. Wadden Sea Working Group. 4.)
Beukema, J. J., 1989. Long-term changes in macrozoobenthic abundance on the tidal flats of the western part of the Dutch Wadden Sea..—Helgoländer Meeresunters.43, 405–415.
Beukema, J. J., Essink, K., Michaelis, H. & Zwarts, L., 1993. Year-to-year variability in the biomass of macrobenthic animals on tidal flats of the Wadden Sea: how predictable is this food source for birds?—Neth. J. Sea Res.31, 319–330.
Castro, G., Myers, J. P. & Rickleffs, R. E., 1992. Ecology and energetics of Sanderlings migrating to four latitudes.—Ecology73, 833–844.
Castro, G., Stoyan, N. & Myers, J. P., 1989. Assimilation efficiency in birds: a function of taxon or food type?—Comp. Biochem. Physiol.92A, 271–278.
Cramp, S. & Simmons, K. E. L., 1983. The birds of the Western Palearctic. Oxford Univ. Press, Oxford,3, 1–913.
Dernedde, T., 1993. Vergleichende Untersuchungen zur Nahrungszusammensetzung von Silbermöwe (Larus argentatus), Sturmmöwe (L. canus) und Lachmöwe (L. ridibundus) im Königshafen/Sylt.—Corax15, 222–240
Eisma, D., 1980. Natural forces. In: Geomorphology of the Wadden Sea. Ed. by K. S. Dijkema, H.-E. Reineck & W. J. Wolff. Balkema, Rotterdam, 20–31. (Rep. Wadden Sea Working Group. 1.)
Evans, P. R., 1979. Adaptations shown by foraging shorebirds, to cyclical variations in the activity and availability of their intertidal invertebrate prey. In: Cyclic phenomena in marine plants and animals. Ed. by E. Naylor & R. G. Hartnoll Pergamon Press, Oxford, 357–366.
Evans, P. R. & Dugan, P. J., 1984. Coastal birds: numbers in relation to food resources. In: Coastal waders and wildfowl in winter. Ed. by P. R. Evans, J. D. Goss-Custard & W. G. Hale Cambridge Univ. Press, London, 8–28.
Hockey, P. A. R., Navarro, R. A., Kalejta, B. & Velasquez, C. R., 1992. The riddle of the sands: Why are shorebird densities so high in southern estuaries?—Am. Nat.140, 961–979.
Humphreys, W. F., 1979. Production and respiration in animal populations.—J. Anim. Ecol.48, 427–453.
Jensen, K. T., 1992. Macrozoobenthos on an intertidal mudflat in the Danish Wadden Sea: comparisons of surveys made in the 1930s, 1940s and 1980s.—Helgoländer Meeresunters.46, 363–376.
Kersten, M. & Piersma, T., 1987. High levels of energy expenditure in shorebirds; metabolic adaptations to an energetically expensive way of life.—Ardea75, 175–187.
Krebs, C. J., 1985. Ecology, Harper & Row, New York, 800 pp.
Kuipers, B. R., de Wilde, P. A. W. & Creutzberg, F., 1981. Energy flow in a tidal flat ecosystem. —Mar. Ecol. Prog. Ser.5, 215–221.
Lackschewitz, D. 1995. Besiedlungsmuster des, Makrobenthos im Sylt-Römö-Wattenmeer. SWAP Teilprojekt 2.2/2.3/3.2. Abschlußbericht. List, 52 pp.
Meire, P. M., Schekkermann, H. & Meininger, P. L., 1994. Consumption of benthic invertebrates by waterbirds in the Oosterschelde estuary, SW Netherlands.—Hydrobiologia282/283, 525–546.
Meltofte, H., Blew, J., Frikke, J., Rösner, H.-U. & Smit, C. J., 1994. Numbers and distribution of waterbirds in the Wadden Sea. Results and evaluation of 36 simultaneous counts in the Dutch-German-Danish Wadden Sea 1980–1991.—IWRB Publication34/Wader Study Group Bull74 (Spec. issue), 1–192.
Nehls, G., 1989. Occurrence and food consumption of the Common Eider,Somateria mollissima, in the Wadden Sea of Schleswig-Holstein.—Helgoländer Meeresunters.43, 385–393.
Nehls, G., 1991. Bestand, Jahresrhythmus und Nahrungsökologie der Eiderente,Somateria mollissima, L. 1758, im Schleswig-Holsteinischen Wattenmeer.—Corax14, 146–209.
Nehls, G. 1995. Strategien der Ernährung und ihre Bedeutung für Energiehaushalt und Ökologie der Eiderente (Somateria mollissima (L. 1758)). Diss., Univ. Kiel, 173 pp.
Nehls, G. & Tiedemann, R., 1993. What determines the densities of feeding birds on tidal flats? A case study on Dunlin,Calidris alpina, in the Wadden Sea.—Neth. J. Sea Res.31, 375–384.
Pihl, S. & Frikke, J., 1992. Counting birds from aeroplane. In: Manual for aeroplane and ship surveys of waterfowl and seabirds. Ed. by J. Komdeur, J. Bertelsen, & G. Cracknell.—IWRB Spec. Publ.19, 8–23.
Prater, A. J., 1981. Estuary birds of Britain and Ireland. Poyser, Calton, 440 pp.
Prokosch, P., 1988. Das Schleswig-Holsteinische Wattenmeer als Frühjahrs-Aufenthaltsgebiet arktischer Watvogelpopulationen am Beispiel von Kiebitzregenpfeifer (Pluvialis squatarola, L. 1758), Knutt (Calidris canutus, L. 1758) und Pfuhlschnepfe (Limosa lapponica, L. 1758).—Corax12, 273–442.
Reise, K., 1985. Tidal flat ecology. Springer, Berlin, 191 pp.
Reise, K., Herre, E. & Sturm, M., 1994. Biomass and abundance of macrofauna in intertidal sediments of Königshafen in the northern Wadden Sea..—Helgoländer Meeresunters.48, 201–215.
Rösner, H.-U., 1994. Population indices for migratory birds in the Schleswig-Holstein Wadden Sea from 1987 to 1993.—Ophelia (Suppl.)6, 171–186.
Rösner, H.-U. & Prokosch, P., 1992. Coastal birds counted in a spring-tide rhythm—a project to determine seasonal and long-term trends of numbers in the Wadden Sea.—Publ. Ser. Neth. Inst. Sea Res.20, 275–279.
Rösner, H.-U., Roomen, M., Südbeck, P. & Rasmussen, L. M., 1994. Migratory waterbirds in the Wadden Sea 1992/1993. Common Wadden Sea Secretariat & Trilateral Monitoring and Assessment Group, Wilhelmshaven, 72 pp. (Wadden Sea Ecosystem. 2.)
Scheiffarth, G. & Nehls, G., 1995. Nutzung unterschiedlicher Wattflächen im Königshafen. In: Trophischer und regulierender Stellenwert der Vögel im Ökosystem Wattenmeer. Ed. by H. Bohlken & H. Hötker. SWAP Teilprojekt 1.7a/2.5a/4.5b. Abschlußbericht. Büsum, 104–137.
Smith, C. J., 1980. Production of biomass by invertebrates and consumption by birds in the Dutch Wadden Sea area. In: Birds of the Wadden Sea. Ed. by C. J. Smit, & W. J. Wolff Balkema, Rotterdam, 290–301. (Rep. Wadden Sea Working Group. 6.)
Smit, C. J. & Wolff, W. J. (Eds), 1980. Birds of the Wadden Sea. Balkema, Rotterdam, 308 pp. (Rep. (Rep. Wadden Sea Working Group. 6.)
Smit, C. J. & Zegers, P. M., 1994. Shorebird counts in the Dutch Wadden Sea, 1980–91: a comparison with the 1965–77 period.—Ophelia (Suppl.)6, 163–170.
Swennen, C., 1984. Differences in quality of roosting flocks of Oystercatchers. In: Coastal waders and wildfowl in winter. Ed. by P. R. Evans, J. D. Goss-Custard & W. G. Hale. Cambridge Univ. Press, London, 177–189.
Wiersma, P., Bruinzeel, L. & Piersma, T., 1993. Energiebesparing bij wadvogels: over de kieren van de Kanoet.—Limosa66, 41–52.
Wiersma, P. & Piersma, T., 1994. Effects of microhabitat, flocking, climate and migratory goal on energy expenditure in the annual cycle of Red Knots.—Condor96, 257–279.
Wolff, W. J., 1991. The interaction of benthic macrofauna and birds in tidal flat estuaries: a comparison of the Banc d’Arguin, Mauritania, and some estuaries in the Netherlands. In: Estuaries and coasts: spatial and temporal intercomparisons Ed. by M. Elliot & J.-P. Ducrotoy. Olsen & Olsen, Fredensborg, 299–306.
Wolff, W. J. & Smit, C. J., 1990. The Banc d’Arguin, Mauritania, as an environment for coastal birds. —Ardea78, 17–38.
Zwarts, L., 1988. Numbers and distributions of coastal waders in Guinea-Bissau.—Ardea76, 42–55.
Zwarts, L. & Blomert, A.-M., 1990. Selectivity of Whimbrels feeding on Fiddler Crabs explained by component specific digestibilities.—Ardea78, 193–208.
Zwarts, L. & Wanink, J. H., 1993. How the food supply harvestable by waders in the Wadden Sea depends on the variation in energy density, body weight, biomass, burying depth and behaviour of tidal-flat invertebrates.—Neth. J. Sea Res.31, 441–476.
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Scheiffarth, G., Nehls, G. Consumption of benthic fauna by carnivorous birds in the Wadden Sea. Helgoländer Meeresunters. 51, 373–387 (1997). https://doi.org/10.1007/BF02908721
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DOI: https://doi.org/10.1007/BF02908721