caa a22 4500 475751558 CHVBK 20180406123525.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1023/A:1009823014111 doi (NATIONALLICENCE)springer-10.1023/A:1009823014111 Eleocharis mutata (L.) Roem. et Schult. subject to drawdowns in a tropical coastal lagoon, State of Rio de Janeiro, Brazil [Elektronische Daten] [C. Palma-Silva, E.F. Albertoni, F.A. Esteves] This investigation of the aquatic macrophyte Eleocharis mutata (L.) Roem. Et Schult. was carried out in Imboassica lagoon, a coastal lagoon in Macaé (22°50′S; 44°42′W), in the northern part of Rio de Janeiro, Brazil. The sandbar separating this lagoon from the ocean has been opened several times for flood control and to allow the entrance of marine species of commercial interest. The barrier bar has been breached without appropriate planning, and the consequences of breaching for the lagoon ecosystem are poorly understood. These openings drastically affect the structure and functioning of the lagoon, but there are no data on possible effects on macrophyte communities. In this project, we obtained data on the increase of the distribution, biomass accumulation and production rates of E.mutata in the establishment of a new stand, in an effort to relate effects of sandbar breach events to the expansion of this species. During 22 months of sampling, 4 breachings of the sandbar occurred, and E.mutata increased its area of coverage by about 8⋅104m2, or 2.5% of the total area of the lagoon. The total aerial biomass reached a maximum of 1515g DW m−2, and the underground biomass reached 583g DW m−2. During the establishment and development of the stand, both dead and live aerial biomass and underground biomass tended to accumulate. Aerial net primary production (ANPP) was quite variable, reaching a maximum of 18.9g DW m−2 d−1. We conclude that the sudden variations in water level caused by breaches in the sandbar were beneficial to the expansion of this species in Imboassica lagoon. Kluwer Academic Publishers, 2000 Aquatic macrophyte nationallicence Eleocharis mutata nationallicence Coastal lagoon nationallicence Primary production nationallicence Biomass nationallicence Drawdown nationallicence Plant Strategies nationallicence Palma-Silva C. Depto. de Ciências Morfobiológicas, Laboratório de Ecologia, Fundação Universidade Federal do Rio Grande, CEP: 96200-900, Rio Grande, RS, Brazil aut Albertoni E.F. Depto. de Ciências Morfobiológicas, Laboratório de Ecologia, Fundação Universidade Federal do Rio Grande, CEP: 96200-900, Rio Grande, RS, Brazil aut Esteves F.A. Depto. de Ciências Morfobiológicas, Laboratório de Ecologia, Fundação Universidade Federal do Rio Grande, CEP: 96200-900, Rio Grande, RS, Brazil aut Plant Ecology Kluwer Academic Publishers 148/2(2000-06-01), 157-164 1385-0237 148:2<157 2000 148 11258 https://doi.org/10.1023/A:1009823014111 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009823014111 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Palma-Silva C. Depto. de Ciências Morfobiológicas, Laboratório de Ecologia, Fundação Universidade Federal do Rio Grande, CEP: 96200-900, Rio Grande, RS, Brazil aut NATIONALLICENCE 700 1- Albertoni E.F. Depto. de Ciências Morfobiológicas, Laboratório de Ecologia, Fundação Universidade Federal do Rio Grande, CEP: 96200-900, Rio Grande, RS, Brazil aut NATIONALLICENCE 700 1- Esteves F.A. Depto. de Ciências Morfobiológicas, Laboratório de Ecologia, Fundação Universidade Federal do Rio Grande, CEP: 96200-900, Rio Grande, RS, Brazil aut NATIONALLICENCE 773 0- Plant Ecology Kluwer Academic Publishers 148/2(2000-06-01), 157-164 1385-0237 148:2<157 2000 148 11258 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer