caa a22 4500 445894059 CHVBK 20180317145625.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10750-011-0835-9 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0835-9 Trade-off between vegetative regeneration and sexual reproduction of Sargassum thunbergii [Elektronische Daten] [Shaohua Chu, Quansheng Zhang, Shikai Liu, Shubao Zhang, Yongzheng Tang, Zhicheng Lu, Yongqiang Yu] An ecological demographic study was conducted from January to December 2009 at Changshan Island on the northern side of Shandong Peninsula, China. The study investigated stem regeneration and the resource trade-off between sexual reproduction and vegetative regeneration of the brown alga Sargassum thunbergii at the individual thallus level. Stem regeneration from the holdfast occurred year round but with significant seasonality, peaking in the early summer. Both percentage of fertile stems and reproductive effort were negatively correlated with stem regeneration in the middle and later periods of sexual reproduction. Furthermore, the correlation coefficients increased significantly with time. These observations suggested that an increase in resource allocation to sexual reproduction would lead to a decrease in allocation to vegetative regeneration during the reproductive period. Reproductive effort was lower and stem regeneration was higher in the wave-exposed location compared with the sheltered location, indicating that allocation of resources between sexual reproduction and vegetative regeneration varied with location. When reproductive tissues were removed, the number of new stems produced from holdfasts increased, and when new stems were removed, an increase in reproductive effort occurred. These results suggest that trade-off between sexual reproduction and vegetative regeneration occurs in S. thunbergii. Springer Science+Business Media B.V., 2011 Sargassum thunbergii nationallicence Trade-off nationallicence Sexual reproduction nationallicence Vegetative regeneration nationallicence Removal treatment nationallicence Chu Shaohua Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut Zhang Quansheng Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut Liu Shikai Fish Molecular Genetics and Biotechnology Laboratory, Auburn University, 36849, Auburn, AL, USA aut Zhang Shubao Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut Tang Yongzheng Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut Lu Zhicheng Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut Yu Yongqiang Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut Hydrobiologia Springer Netherlands 678/1(2011-12-01), 127-135 0018-8158 678:1<127 2011 678 10750 https://doi.org/10.1007/s10750-011-0835-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0835-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chu Shaohua Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Quansheng Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut NATIONALLICENCE 700 1- Liu Shikai Fish Molecular Genetics and Biotechnology Laboratory, Auburn University, 36849, Auburn, AL, USA aut NATIONALLICENCE 700 1- Zhang Shubao Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut NATIONALLICENCE 700 1- Tang Yongzheng Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut NATIONALLICENCE 700 1- Lu Zhicheng Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut NATIONALLICENCE 700 1- Yu Yongqiang Ocean School, Yantai University, 264005, Yantai, People's Republic of China aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 678/1(2011-12-01), 127-135 0018-8158 678:1<127 2011 678 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer