Next Article in Journal
Hydrological Extremes and Responses to Climate Change in the Kelantan River Basin, Malaysia, Based on the CMIP6 HighResMIP Experiments
Previous Article in Journal
Emerging Contaminants in Water: Detection, Treatment, and Regulation
Article

Interacting Flooding and Competition Negatively Affect Growth of Riparian Species Dominating a Reservoir Shoreline

1
School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
2
The Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Eva Papastergiadou
Water 2021, 13(11), 1471; https://doi.org/10.3390/w13111471
Received: 2 March 2021 / Revised: 19 May 2021 / Accepted: 19 May 2021 / Published: 24 May 2021
(This article belongs to the Section Water Quality and Contamination)
Plant–plant interactions change in response to environmental conditions, and riparian species are commonly influenced by flooding. This study tested whether flooding affects the intraspecific and interspecific competition of two riparian species and whether such effects depend on the topographic positions where plants have established. Seeds of the riparian species Polygonum hydropiper were collected from both low and high positions within the shoreline of the Three Gorges Reservoir. Groups of P. hydropiper seedlings from each position were either grown alone (i.e., without competition), with another group of P. hydropiper seedlings (i.e., intraspecific competition), or with a group of seedlings of the companion species Xanthium sibiricum (i.e., interspecific competition). Each group comprised six replicates. In total, 288 plants of P. hydropiper and 84 plants of X. sibiricum were selected for the experiment. Seedlings were subjected to control and flooding treatments for 60 days. Irrespective of competition type (i.e., intra- or interspecific), both flooding and competition negatively affected the growth and/or photosynthetic capacities of P. hydropiper. Flooding only interacted with competition to explain total biomass. Flooding reduced total biomass in a larger proportion in the absence of competition, and, to a lesser extent, with intraspecific competition, compared to interspecific competition. However, such interaction effects were independent of the positions where the seeds that originated from the plants were collected from. Interspecific competition significantly decreased the chlorophyll content and photosynthetic efficiency of plants, while intraspecific competition did not. In general, plants from lower positions had higher total chlorophyll content than plants from higher positions. These results suggest that flooding may regulate the population dynamics of P. hydropiper by altering its competitive interactions. View Full-Text
Keywords: hydrofluctuation zone; interspecific competition; intraspecific competition; waterlogging; wetland plant hydrofluctuation zone; interspecific competition; intraspecific competition; waterlogging; wetland plant
Show Figures

Figure 1

MDPI and ACS Style

Chen, Y.-H.; Sun, X.-S.; Cui, Y.; Zhuo, N.; Wei, G.-W.; Luo, F.-L.; Zhang, M.-X. Interacting Flooding and Competition Negatively Affect Growth of Riparian Species Dominating a Reservoir Shoreline. Water 2021, 13, 1471. https://doi.org/10.3390/w13111471

AMA Style

Chen Y-H, Sun X-S, Cui Y, Zhuo N, Wei G-W, Luo F-L, Zhang M-X. Interacting Flooding and Competition Negatively Affect Growth of Riparian Species Dominating a Reservoir Shoreline. Water. 2021; 13(11):1471. https://doi.org/10.3390/w13111471

Chicago/Turabian Style

Chen, Yu-Han, Xin-Sheng Sun, Yuan Cui, Na Zhuo, Guan-Wen Wei, Fang-Li Luo, and Ming-Xiang Zhang. 2021. "Interacting Flooding and Competition Negatively Affect Growth of Riparian Species Dominating a Reservoir Shoreline" Water 13, no. 11: 1471. https://doi.org/10.3390/w13111471

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop