Submerged macrophytes facilitate dominance of omnivorous fish in a subtropical shallow lake: implications for lake restoration

Hydrobiologia ◽  
2016 ◽  
Vol 775 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Jinlei Yu ◽  
Zhengwen Liu ◽  
Hu He ◽  
Wei Zhen ◽  
Baohua Guan ◽  
...  
Keyword(s):  
Shallow Lake ◽  
Lake Restoration ◽  
Submerged Macrophytes ◽  
Omnivorous Fish

scholarly journals Omnivorous Carp (Carassius gibelio) Increase Eutrophication in Part by Preventing Development of Large-Bodied Zooplankton and Submerged Macrophytes

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1497
Author(s):  
Vladimir Razlutskij ◽  
Xueying Mei ◽  
Natallia Maisak ◽  
Elena Sysova ◽  
Dzmitry Lukashanets ◽  
...  
Keyword(s):  
Aquatic Ecosystems ◽  
Submerged Macrophytes ◽  
Benthic Algae ◽  
Plankton Community ◽  
Prussian Carp ◽  
Omnivorous Fish ◽  
Outdoor Experiment ◽  
Nitrogen Concentrations ◽  
Lower Biomass

Fish, being an important consumer in aquatic ecosystems, plays a significant role by affecting the key processes of aquatic ecosystems. Omnivorous fish consume a variety of food both from pelagic and benthic habitats and may directly or indirectly affect the plankton community as well as the lake trophic state. We conducted a 72-day outdoor experiment in mesocosms with and without Prussian carp (Carassius auratus) to evaluate the effect of this often-stocked omnivorous fish on the plankton community and water quality. We found that the presence of fish increased the biomass of planktonic algae, total and inorganic suspended solids, leading to decreased light intensity in the water and a lower biomass of benthic algae. Fish also prevented development of submerged macrophytes and the establishment of large-bodied zooplankton. However, the fish did not increase nitrogen concentrations and even was lowered total phosphorus levels, in part due to nutrient storage in the fish. We conclude that stocking of Prussian carp should be avoided, or removed where stocked and abundant, to obtain good ecological quality of shallow lakes, characterized by clear water and high abundance of macrophytes.

Application of the CNOP Method in the Shallow Lake Ecosystem

2014 ◽  
Vol 1010-1012 ◽  
pp. 658-661 ◽  
Author(s):  
Qian Qian Qi ◽  
Bo Wang
Keyword(s):  
Ecological Restoration ◽  
Shallow Lake ◽  
Submerged Macrophytes ◽  
Finite Amplitude ◽  
Water Transparency ◽  
Lake Ecosystem ◽  
Initial Condition ◽  
Turbid Water ◽  
Variable Model

It is serious on the degradation of the shallow lake ecosystem at present, while the recovery of the macrophytes vegetations and the increase in water transparency have been the main contents of the ecological restoration. Using a two-variable model, we discuss the instability and sensitivity of the ecosystem to the finite-amplitude perturbations related to the initial condition with CNOP-I method. Results show that the linearly stable clear (turbid) water states can be nonlinearly unstable with the finite-amplitude perturbations. The results also demonstrate that the facilitation interactions between the submerged macrophytes and the water transparency are the main trigger for a shift from the turbid to the clear state.

Sign in / Sign up

Export Citation Format

Share Document