Do microplastics and climate change negatively affect shredder invertebrates from an amazon stream? An ecosystem...

Area of Science:

• Ecology
• Environmental Science
• Toxicology

Background:

• Freshwater biodiversity faces significant threats from pollution and climate change.
• Microplastic pollution and climate change (rising temperature and CO2) are key stressors impacting aquatic ecosystems.

Purpose of the Study:

• To experimentally assess the individual and combined effects of microplastics and climate change on Amazonian stream shredder invertebrates.
• To test hypotheses regarding the impact of these stressors on survival and food consumption.

Main Methods:

• Simulated future climate change scenarios (increased temperature and CO2) and varying microplastic concentrations.
• Measured survival rates and food consumption of invertebrate shredders under experimental conditions.

Main Results:

• Both microplastics and climate change increased invertebrate mortality risk, but without a significant interaction effect on survival.
• Climate change negatively impacted shredder consumption, while microplastics alone did not.
• The interaction between microplastics and climate change reduced consumption in a dose-dependent manner, particularly under extreme climate scenarios.

Conclusions:

• Microplastics and climate change pose significant risks to Amazonian stream invertebrates, affecting survival and consumption.
• These stressors can disrupt crucial ecosystem functions like nutrient cycling.
• Integrated strategies are needed to address the co-occurring threats of plastic pollution and climate change.