TY - JOUR
T1 - Modeling the influence of initial density and copper exposure on the interspecific competition of two algal species
AU - Kim, Yongeun
AU - Son, Jino
AU - Mo, Hyoung Ho
AU - Lee, Yun Sik
AU - Cho, Kijong
N1 - Funding Information:
This subject is supported by Korea Ministry of Environment (MOE) as “The Chemical Accident Prevention Technology Development Project.” (2016001970003) and by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1A6A3A11035451).
Funding Information:
This subject is supported by Korea Ministry of Environment (MOE) as “The Chemical Accident Prevention Technology Development Project.” ( 2016001970003 ) and by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2017R1A6A3A11035451 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/9/10
Y1 - 2018/9/10
N2 - The interspecific competition among algal species is an important process that can change the community structure in aquatic ecosystems. However, there is still a lack of understanding of the impact of various factors on interspecific competition. In this study, both experimental and mathematical modeling approaches were employed to investigate how various combinations of the initial cell densities of Pseudokirchneriella subcapitata and Chlorella vulgaris and copper exposure levels affect interspecific competition between these species. In the simulation results, C. vulgaris appeared to be superior to P. subcapitata in the absence of copper exposure. However, in the copper-exposed groups, the competitive positions of both algal species varied with the initial cell density and the copper exposure level. In particular, at the highest copper concentration (10 μg/L), C. vulgaris became less competitive than P. subcapitata in most initial cell density combinations, resulting in a shift in competitive dominance. This study clearly showed that the dominant species in the interspecific competition could be altered by the two factors studied herein. The developed model provided a more detailed and intuitive understanding of the effects of the two factors on the interspecific competition by simulating the competition at various combinations of initial algal density and copper exposure levels. In this study, the initial algal density and copper exposure levels were selected as the factors influencing the interspecific competition between P. subcapitata and C. vulgaris, but the proposed model could be used to study the effects of other toxicants on the interspecific competition between other algal species.
AB - The interspecific competition among algal species is an important process that can change the community structure in aquatic ecosystems. However, there is still a lack of understanding of the impact of various factors on interspecific competition. In this study, both experimental and mathematical modeling approaches were employed to investigate how various combinations of the initial cell densities of Pseudokirchneriella subcapitata and Chlorella vulgaris and copper exposure levels affect interspecific competition between these species. In the simulation results, C. vulgaris appeared to be superior to P. subcapitata in the absence of copper exposure. However, in the copper-exposed groups, the competitive positions of both algal species varied with the initial cell density and the copper exposure level. In particular, at the highest copper concentration (10 μg/L), C. vulgaris became less competitive than P. subcapitata in most initial cell density combinations, resulting in a shift in competitive dominance. This study clearly showed that the dominant species in the interspecific competition could be altered by the two factors studied herein. The developed model provided a more detailed and intuitive understanding of the effects of the two factors on the interspecific competition by simulating the competition at various combinations of initial algal density and copper exposure levels. In this study, the initial algal density and copper exposure levels were selected as the factors influencing the interspecific competition between P. subcapitata and C. vulgaris, but the proposed model could be used to study the effects of other toxicants on the interspecific competition between other algal species.
KW - Allelopathy
KW - Chlorella vulgaris
KW - Competitive dominance
KW - Competitive response
KW - Pseudokirchneriella subcapitata
UR - http://www.scopus.com/inward/record.url?scp=85048598863&partnerID=8YFLogxK
U2 - 10.1016/j.ecolmodel.2018.04.018
DO - 10.1016/j.ecolmodel.2018.04.018
M3 - Article
AN - SCOPUS:85048598863
SN - 0304-3800
VL - 383
SP - 160
EP - 170
JO - Ecological Modelling
JF - Ecological Modelling
ER -