caa a22 4500 46788546X CHVBK 20180406152733.0 cr unu---uuuuu 170328e20061101xx s 000 0 eng 10.1007/s10021-005-0188-1 doi (NATIONALLICENCE)springer-10.1007/s10021-005-0188-1 Nutrient Addition to Experimental Rocky Shore Communities Revisited: Delayed Responses, Rapid Recovery [Elektronische Daten] [Patrik Kraufvelin, Frithjof Moy, Hartvig Christie, Tor Bokn] Coastal eutrophication may alter the dominance patterns of marine macroalgae, with potential consequences for the associated fauna and the entire ecosystem. Benthic macroalgae and animals in control and nutrient-enriched mesocosms were monitored to investigate eutrophication-induced changes in rocky shore communities. During a 3-year project, nutrient addition had only minor effects on the community structure, such as increased cover and biomass of green Ulva spp. and increased abundance of certain animal species at high nutrient levels. This study is a 4-year extension of a previously reported project, with 2 extra years of effect studies (altogether 5 years) and a subsequent 2 years for recovery. During the 4th year of nutrient enrichment, the cover of Fucus vesiculosus and Fucus serratus started to decline. In the 5th year, these canopy species crashed and there was an evident take-over by green algae at high nutrient addition levels. The previously observed abundance stimulation for fauna disappeared later in the time series, probably due to the loss of the macroalgal canopy. After less than 2 years on regular seawater, the algal and animal communities had returned to within the range of normal variability. The results indicate that established rocky shore communities of perennial algae with associated fauna are able to persist for several years, even at very high nutrient levels, but that community shifts may suddenly occur if eutrophication continues. They also indicate that rocky shore communities have the ability to return rapidly to natural undisturbed conditions after the termination of nutrient enhancement. Springer Science+Business Media, Inc., 2006 mesocosm nationallicence coastal eutrophication nationallicence intertidal communities nationallicence canopy algae nationallicence green tides nationallicence marine biodiversity nationallicence nutrient enrichment nationallicence long-term experiment nationallicence Kraufvelin Patrik Environmental and Marine Biology, Åbo Akademi University, Akademigatan 1, FIN-20500, Turku/Åbo, Finland aut Moy Frithjof Norwegian Institute for Water Research (NIVA), P.O. Box 173, N-0411, Oslo, Kjelsaas, Norway aut Christie Hartvig Norwegian Institute for Water Research (NIVA), P.O. Box 173, N-0411, Oslo, Kjelsaas, Norway aut Bokn Tor Norwegian Institute for Water Research (NIVA), P.O. Box 173, N-0411, Oslo, Kjelsaas, Norway aut Ecosystems Springer-Verlag; www.springer-ny.com 9/7(2006-11-01), 1076-1093 1432-9840 9:7<1076 2006 9 10021 https://doi.org/10.1007/s10021-005-0188-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-005-0188-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kraufvelin Patrik Environmental and Marine Biology, Åbo Akademi University, Akademigatan 1, FIN-20500, Turku/Åbo, Finland aut NATIONALLICENCE 700 1- Moy Frithjof Norwegian Institute for Water Research (NIVA), P.O. Box 173, N-0411, Oslo, Kjelsaas, Norway aut NATIONALLICENCE 700 1- Christie Hartvig Norwegian Institute for Water Research (NIVA), P.O. Box 173, N-0411, Oslo, Kjelsaas, Norway aut NATIONALLICENCE 700 1- Bokn Tor Norwegian Institute for Water Research (NIVA), P.O. Box 173, N-0411, Oslo, Kjelsaas, Norway aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag; www.springer-ny.com 9/7(2006-11-01), 1076-1093 1432-9840 9:7<1076 2006 9 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer