Text 1
Biologist Elena Rostova argues that microplastics in agricultural soils pose a severe threat to earthworms (). Her laboratory study showed that high concentrations of polyethylene microparticles reduce earthworm growth rates by and impair soil aeration by disrupting burrowing behaviors. Rostova warns that these localized effects could trigger a broader cascade of agricultural soil degradation, ultimately threatening crop yields.
Text 2
Soil scientist Dr. Marcus Thorne acknowledges Rostova’s laboratory findings but argues that her experiment used microparticle concentrations times higher than those typically recorded in actual agricultural fields. Thorne's field observations show that under realistic conditions, earthworms exhibit negligible behavioral shifts. He suggests that organic matter in natural soil buffers the physical impacts of plastics, mitigating the risks of widespread soil degradation Rostova describes.
Match each claim or finding from Rostova’s research in Text 1 with the corresponding counterargument or qualification made by Thorne in Text 2.
- Rostova's laboratory finding that microplastics reduce earthworm growth rates by .Thorne's qualification that the experimental concentrations used to produce this effect were unnaturally high.
- Rostova's observation that microplastics impair soil aeration by disrupting burrowing behaviors.Thorne's counter-finding that earthworms show negligible behavioral changes under realistic field conditions.
- Rostova's warning that localized microplastic impacts could trigger widespread agricultural soil degradation.Thorne's argument that organic matter buffers physical impacts and mitigates the risk of large-scale damage.