naa a22 4500 510753590 CHVBK 20180411083113.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s13131-013-0322-4 doi (NATIONALLICENCE)springer-10.1007/s13131-013-0322-4 Factors regulating population dynamics of the amphipod Ampithoe valida in a eutrophic subtropical coastal lagoon [Elektronische Daten] [Xinqing Zheng, Lingfeng Huang, Bangqin Huang, Yongqing Lin] Year-round investigations were carried out to address the population dynamics of amphipod Ampithoe valida and its potential regulating factors in the Yundang Lagoon (a eutrophic subtropical coastal lagoon in Xiamen City, China) from October 2007 to October 2008. The results show that A. valida population was largely composed of juveniles and reached a peak abundance (12.02×103 ind./m2) in March, but sharply shrunk in July. The monthly variation pattern of A. valida seemed to follow that of Ulva lactuca which is the main food resource for A. valida, indicating a strong influence of food availability on A. valida population dynamics. Life cycle studies in laboratory indicate that A. valida adopted an r -selected life strategy, e.g., rapid growth rate (0.216-0.302 mm/d), consecutive breeding (4-10 times), short reproductive rhythm (9-17 d) and huge fecundity (24-192 eggs or 6-94 juveniles per brood), which contributed to the fast population growth of A. valida from January to March. Although temperature may also be a significant cause, A. valida could grow quickly and show normal reproductive traits (i.e., the timing of sexual differentiation or maturity, the reproductive rhythm, the number of broods all through its lifespan and offspring production) in temperature between 15-30°C. Therefore, the temperature variation in the lagoon water should not account for the sharp variation of A. valida population by affecting the survival, growth and reproduction of the amphipod. However, negative correlation between water temperature and U. lactuca biomass in the lagoon suggested that temperature could have indirectly affected the population dynamics of A. valida by affecting its food availability. The authors conclude that, in the Yundang Lagoon, the population dynamics of A. valida was mainly controlled by the food availability rather than water temperature. The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg, 2013 Ampithoe valida nationallicence population dynamics nationallicence food availability nationallicence Ulva lactuca nationallicence the Yundang Lagoon nationallicence Zheng Xinqing Third Institute of Oceanography, State Oceanic Administration, 361005, Xiamen, China aut Huang Lingfeng Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, 361005, Xiamen, China aut Huang Bangqin Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, 361005, Xiamen, China aut Lin Yongqing Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, 361005, Xiamen, China aut Acta Oceanologica Sinica The Chinese Society of Oceanography 32/6(2013-06-01), 56-65 0253-505X 32:6<56 2013 32 13131 https://doi.org/10.1007/s13131-013-0322-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13131-013-0322-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zheng Xinqing Third Institute of Oceanography, State Oceanic Administration, 361005, Xiamen, China aut NATIONALLICENCE 700 1- Huang Lingfeng Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, 361005, Xiamen, China aut NATIONALLICENCE 700 1- Huang Bangqin Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, 361005, Xiamen, China aut NATIONALLICENCE 700 1- Lin Yongqing Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, 361005, Xiamen, China aut NATIONALLICENCE 773 0- Acta Oceanologica Sinica The Chinese Society of Oceanography 32/6(2013-06-01), 56-65 0253-505X 32:6<56 2013 32 13131 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer