A watershed is an area of land where all of the water and precipitation that it contains (including underground) drains off it and goes into a central place. Watersheds are not defined by political boundaries and come in all shapes and sizes. This water is vital to life and provides habitat to animals and plants and is essential to ecosystem processes. A watershed also contains cultures and practices of the people sustained by these ecosystem processes, but pollution can impair the health of our watersheds. Therefore, it is important to protect the quality of our watershed. – See more at: http://www.nature.org/ourinitiatives/regions/northamerica/unitedstates/indiana/journeywithnature/watersheds-101.xml#sthash.siXAU7Ba.dpuf
A floristic study inventories and documents all plant species within a given area (defined either naturally or politically), in order to understand the distribution, frequency, ecology, etc. of all species. In a floristic study, plants are collected as well as other metadata about the plant, such as it’s precise location, habitat, substrate, slope aspect, associated species etc. at each site where the collections are made. Plant collections involve removal of only enough plant material so as to be representative and necessary for identification and that can be preserved on herbarium sheets. In the case of rare plants, collections may be restricted to a single voucher. Floristics studies are important because they provide baseline information and data about the the current distribution and frequency of species. This type of information is needed for conservation efforts to identify and monitor which species are near extinction or endangered by indicating which areas of the world have high diversity. Floristic studies are also important in other fields of science including Systematics, Taxonomy, Ecology, Population Genetics, etc.