The Influence of Macrophytes on Aquatic Microclimate

Abstract: How terrestrial vegetation influences microclimate and what effects this has on associated ecosystems is well studied, but it is less known if and how aquatic macrophytes affect their microclimate. In this study I therefore aim to investigate the question of how aquatic macrophytes influence their microclimate, and how these effects in turn may affect associated aquatic organisms and ecosystems. This was done by conducting a literature search and review of relevant scientific articles. I found that aquatic macrophytes influence microclimate in several ways. First, their photosynthetic activity can affect water and sediment chemistry by changing carbon and oxygen levels, which also influences pH. Secondly, local temperature can also be influenced by macrophytes through shading and heat retention, which in turn also can affect water movement via density differences. Third, aquatic macrophytes can affect light levels in the water column, both negatively through shading, and positively by reduction of particles in the water. I conclude that aquatic macrophytes do influence microclimate. This influence can change the local environment, thus also affecting associated organisms and ecosystems. These conclusions are important for future research of aquatic environments when looking at challenges such as climate change and maintaining and protecting biodiversity and whole ecosystems.