The results were analyzed with calculations of a diversity index and a water quality index based on the relative presence of bioindicator taxa. This difference may be the result of nutrient enrichment from run-off, leading to the presence of a notable filamentous algal turf on the benthic substrate. Introduction Over the past decade, biodiversity has become an important focus of scientific research and a foundation for conservation policy and practice. Today, surveys of biodiversity are useful tools in the identification and assessment of environmental degradation. Measures of diversity made in closely associated sites can provide an indication of relative health and stability of local ecosystems.
Aquatic systems are particularly important as early indicators of ecological decline.
One group of aquatic organisms that exhibits measurable variation in diversity, and is easy to sample, is the community of benthic macroinvertebrates. The census of these species has been practiced to the point that indices of water quality based on the presence or absence of pollution tolerant taxa are commonly calculated. With the creation of the Center For Environmental Literacy, ecological awareness has recently become more of an academic priority at Mount Holyoke College. As a result, students in classes across the curriculum are taking part in projects designed to expand awareness of the campus environment. Among the features of the campus landscape, the stream and lake system is of primary ecological importance.