A dynamic temperature difference control recording system in shallow lake mesocosm

Wang, Tao; Xu, Jun; Molinos, Jorge García; Li, Chao; Hu, Bowen; Pan, Meng; Zhang, Min

doi:10.1016/j.mex.2020.100930

Cited by 18 publications

(12 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was achieved by using a computer-controlled system with two temperature sensors (DS18B20) and a heating element (600 W) hanging in each mesocosm. Water temperatures in the heated mesocosms were elevated +4.5°C based on the mean temperatures in the ambient mesocosms (Wang, Xu, et al, 2020). The biomass and density of the fish in the mesocosms (about 340 kg/ha) are within the range found in lakes of this region (Gao et al, 2014), but can also be found in ponds and lakes of other regions in the world (Vilizzi et al, 2015).…”

Section: Experimental Set-upmentioning

confidence: 92%

Warming alters juvenile carp effects on macrophytes resulting in a shift to turbid conditions in freshwater mesocosms

Zhang

Wang

et al. 2021

Journal of Applied Ecology

Self Cite

View full text Add to dashboard Cite

1. Multiple stressors such as climate change and eutrophication are responsible for the global decline in macrophytes in lakes. The loss of this key component can result in turbid conditions and a loss of important ecosystem functions and services, particularly in shallow lakes. Benthivorous fish, which can increase in abundance during eutrophication, can adversely affect macrophytes through physical disturbance, cascading effects on turbidity, suspended and attached algae (phytoplankton and periphyton) and direct consumption. However, whether warming amplifies their effects on macrophytes and can trigger regime shifts remains unexplored.2. Here, we tested the single and combined effects of warmer water (+4.5°C) and the widespread benthivorous juvenile common carp Cyprinus carpio on two different types of aquatic macrophytes in 24 mesocosms (2,500 L each). We monitored phytoplankton, periphyton, turbidity and the abundance of the submerged curly leafed pondweed Potamogeton crispus and the floating-leaved water chestnut Trapa bispinosa during their growing season. These species dominated successively in spring and summer.3. Warming alone advanced the growing season of P. crispus by 17 days. Juvenile carp decreased the abundance of the more palatable P. crispus, but promoted the abundance of T. bispinosa, supporting an ecosystem shift to a dominance of floating-leaved macrophytes. Fish also substantially increased water turbidity and the biomass of phytoplankton and periphyton. Warming amplified juvenile carp effects on turbidity and submerged macrophytes, but also decreased the abundance of floating-leaved macrophytes leading to an overall macrophyte decline and increase in water turbidity. Synthesis and applications.Our study provides the first experimental evidence for a warming-induced regime shift from clear-water conditions dominated by submerged or floating/floating-leaved macrophytes to a turbid state in shallow aquatic ecosystems. The regime shift was triggered by the impacts of warming on benthivorous fish (juvenile common carp) rather than on macrophytes. Lowering nutrient loading and other measures to reduce the abundance of benthivorous

show abstract

Section: Experimental Set-upmentioning

confidence: 92%

Warming alters juvenile carp effects on macrophytes resulting in a shift to turbid conditions in freshwater mesocosms

Zhang

Wang

et al. 2021

Journal of Applied Ecology

Self Cite

View full text Add to dashboard Cite

show abstract

“…All water added to the experimental mesocosms was filtered through a 20 mm mesh. We fixed temperature sensors (DS18B20, Maxim IC, Dallas, TX, USA) and heating units (A10-3, Xin Shao Guangzhou, China) to each polyethylene mesocosms to monitor the temperature of all treatments in real time [ 33 ]. All mesocosms were left for colonization under ambient conditions for two months (November–December 2018) before the start of the experiment.…”

Section: Methodsmentioning

confidence: 99%

Bacterial Metabolic Potential in Response to Climate Warming Alters the Decomposition Process of Aquatic Plant Litter—In Shallow Lake Mesocosms

et al. 2022

Self Cite

View full text Add to dashboard Cite

Increased decomposition rates in shallow lakes with global warming might increase the release of atmospheric greenhouse gases, thereby producing positive feedback for global warming. However, how climate warming affects litter decomposition is still unclear in lake ecosystems. Here, we tested the effects of constant and variable warming on the bacterial metabolic potential of typically submerged macrophyte (Potamogeton crispus L.) litters during decomposition in 18 mesocosms (2500 L each). The results showed that warming reduced main chemoheterotrophic metabolic potential but promoted methylotrophy metabolism, which means that further warming may alter methane-cycling microbial metabolism. The nitrate reduction function was inhibited under warming treatments, and nitrogen fixation capability significantly increased under variable warming in summer. The changes in dissolved oxygen (DO), pH, conductivity and ammonium nitrogen driven by warming are the main environmental factors affecting the bacteria’s metabolic potential. The effects of warming and environmental factors on fermentation, nitrate reduction and ammonification capabilities in stem and leaf litter were different, and the bacterial potential in the stem litter were more strongly responsive to environmental factors. These findings suggest that warming may considerably alter bacterial metabolic potential in macrophyte litter, contributing to long-term positive feedback between the C and N cycle and climate.

show abstract

“…Other designs offered inexpensive materials and open-source hardware (Arduino) to control heating elements and CO 2 injection systems [18] . They allow real-time monitoring and constant manipulation of water temperature by fully-automated systems, comprising temperature (micro-) controller in combination with installed heating elements and (digital) temperature sensors [19] , [20] , [21] , or heat exchange pipes fed by hot water tanks combined with a differential thermocouple [22] , respectively. Additional improvements in aquatic experimental research, particularly considering spatial and temporal aspects, are for instance provided by mesocosm infrastructures [23] equipped with autonomous and high frequency measuring systems.…”

Section: Hardware In Contextmentioning

confidence: 99%

A transportable temperature and heatwave control device (TENTACLE) for laboratory and field simulations of different climate change scenarios in aquatic micro- and mesocosms

et al. 2022

View full text Add to dashboard Cite

A dynamic temperature difference control recording system in shallow lake mesocosm

Cited by 18 publications

References 11 publications

Warming alters juvenile carp effects on macrophytes resulting in a shift to turbid conditions in freshwater mesocosms

Warming alters juvenile carp effects on macrophytes resulting in a shift to turbid conditions in freshwater mesocosms

Bacterial Metabolic Potential in Response to Climate Warming Alters the Decomposition Process of Aquatic Plant Litter—In Shallow Lake Mesocosms

A transportable temperature and heatwave control device (TENTACLE) for laboratory and field simulations of different climate change scenarios in aquatic micro- and mesocosms

Contact Info

Product

Resources

About