What is likely the most important factor affecting the biological structure of the Everglades?

The most significant factor affecting the biological structure of the Everglades is climate change. This is because climate change has wide-ranging impacts on ecosystems, especially in sensitive areas like wetlands. Rising temperatures can alter the distribution of plant and animal species within the Everglades, while changes in precipitation patterns may affect water levels, which are crucial for the intricate balance of its unique ecosystem.

In particular, climate change can lead to increased flooding or drought conditions, both of which can disrupt the habitats of numerous species. It can influence salinity levels, especially with rising sea levels, further stressing freshwater systems that are essential for the biological diversity of the region.

While water pollution, sugar subsidies, and urban development contribute significantly to the degradation of the Everglades, their impacts may be considered more localized or secondary to the overarching influence of climate change on ecosystems globally. Climate change creates a compounding effect that exacerbates existing issues, making it a critical focus for conservation efforts in the Everglades.