The theoretical basis for this experiment lies in the understanding of how ecological systems, particularly aquatic ecosystems like Fullerton Creek, are influenced by environmental factors such as large rainfall events and the water flow that accompany them. Rainfall is a crucial driver of ecosystem dynamics, directly affecting water levels, flow rates, and water quality in creeks and streams. These changes can have significant impacts on the abundance, distribution, and behavior of aquatic organisms, including fish.
The experiment is grounded in the theory that increased rainfall can lead to changes in fish populations. When rainfall is high, creeks experience increased water flow and higher water levels, creating more favorable conditions for fish reproduction and growth. Conversely, periods of low rainfall can result in decreased water flow and lower water levels, potentially reducing habitat availability and impacting fish survival.
Additionally, the choice of pools for sampling is based on the theory that different habitat types within a creek can support varying fish populations. Each pool may have unique characteristics, such as depth and vegetation cover, influencing fish distribution and abundance.