AICE Marine Science Paper 2 Practice Exam

Crustaceans can negatively impact marine environments by hindering the growth of seagrass and other aquatic plants. This occurs because certain crustaceans, like herbivorous species, feed on seagrass and other marine vegetation, which can lead to decreased plant biomass and coverage. When seagrass is overgrazed, it can disrupt the habitat required for various marine species, as seagrasses play a crucial role in providing shelter, breeding grounds, and food sources for many fish and invertebrate populations. The loss of seagrass also contributes to increased sedimentation and nutrient runoff in coastal areas, further degrading water quality and marine habitats. Moreover, the decline in seagrass ecosystems can lead to reduced oxygen production and increased carbon dioxide levels in these environments, impacting overall marine biodiversity and ecosystem health.