Physical space interacts with clonal fragmentation and nutrient availability to affect the growth of Salvinia natans

Autoři: Chao Si aff001;  Yu Jin aff002;  Jing Lin aff002;  Jian-Feng Zhang aff002;  Jin-Song Chen aff003;  Fei-Hai Yu aff001
Působiště autorů: School of Nature Conservation, Beijing Forestry University, Beijing, China aff001;  Institute of Wetland Ecology & Clone Ecology, Taizhou University, Taizhou, China aff002;  College of Life Science, Sichuan Normal University, Chengdu, China aff003
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0226850


Physical space, clonal fragmentation and nutrient availability can each affect the growth of clonal plants, but their interactive effect has been little studied. We grew un-fragmented (connected) and fragmented (disconnected) ramet pairs of the floating, clonal plant Salvinia natans in cylindrical containers with different diameters and heights (volumes) filled with solutions of two nutrient levels (high vs. low). To simulate competition environments that are commonly confronted by S. natans, we also added two ramets of another floating plants Spirodela polyrrhiza in each container. Biomass (total biomass, floating biomass and submerged biomass) and number of ramets of S. salvinia were higher in the containers with a larger diameter. Compared to the low nutrient level, the high nutrient level increased number of ramets, and altered submerged to floating mass ratio of S. salvinia. The impacts of physical space on floating mass and number of ramets were stronger under the high than under the low nutrient level. Clonal fragmentation positively affected biomass in the containers with a smaller volume (a smaller height and diameter), but had little impact in the containers with a larger volume (a larger height or diameter). Our results suggest that physical space can interact with nutrients and clonal fragmentation to affect the performance of S. salvinia under competition.

Klíčová slova:

Biomass – Ecosystems – Leaves – Plant communities – Plant growth and development – Plant physiology – Fronds – Greenhouses


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