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Geng Wang, Rui Dong, Huimin Xu, Dewen Ding. Dynamic simulation of tropical coral reef ecosystem being disturbed by multiple situations[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1779-1
Citation: Geng Wang, Rui Dong, Huimin Xu, Dewen Ding. Dynamic simulation of tropical coral reef ecosystem being disturbed by multiple situations[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1779-1

Dynamic simulation of tropical coral reef ecosystem being disturbed by multiple situations

doi: 10.1007/s13131-021-1779-1
Funds:  The Strategic Priority Research Program of the Chinese Academy of Science under contract No. XDA13020401.
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  • Corresponding author: E-mail address: wanggeng@lnnu.edu.cn
  • Received Date: 2020-03-13
  • Accepted Date: 2020-05-14
  • Available Online: 2021-06-29
  • In consideration of the rapid degradation of coral reef ecosystems, the establishment of models is helpful to comprehend the degradation mechanism of coral reef ecosystems and predict the development process of coral reef communities. According to the characteristics of complex ecosystem of tropical coral reefs in China, the coral reef functional group is the core level variable; combined with the multiple feedback effects of coral reef functional groups and environmental changes, the study presents a coral reef ecosystem dynamics model with hermatypic corals as the core. Based on the simulation of the assumed initial value and the internal feedback of the system, the results show that in the basic simulation (relative health conditions), the coverage area of live corals and coral reefs generally decreased first and then increased, and increased by 4.67% and 6.38% between 2010 and 2050, respectively. Based on the calibration model and the current situation of the studied area, the multi-factor disturbance effects of coral reef communities were simulated and explored by setting up three scenarios involving fishing policy, terrestrial deposition, and inorganic nitrogen emissions. Among them, in the single factor disturbance, the fishing policy exerts the most direct impact on the community decline; and the succession phenomenon is obvious; the terrestrial sedimentation has a faster and more integrated effect on the community decline; the effect of inorganic nitrogen emission on the community decline is relatively slow. In the double/multi-factor disturbance, the superimposed disturbance will aggravate the multi-source feedback effect of the coral reef communities development, accelerate the community decay rate, and make its development trajectory more complicated and diverse. This method provides a scientific and feasible method for simulating the damage of long-term coral reef community and exploring the development law and adaptive management of coral reef ecosystems. In the future, it can be further studied in the ecological restoration process and decision-making direction of coral reefs.
  • Estimated by existing research, 300 hm2 of coral reefs can support about 2 000 ind.crown-of-thorns starfish with an initial living coral coverage of 11.6%.
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