February 2020
SCCF Member Update
Sanibel Community Lakes Project By Mark Thompson, Marine Laboratory Associate SCCF Marine Laboratory evaluates lakes on Sanibel to provide the City and island residents insight into the success of their nutrient reduction strategies. In the next few weeks, scientists from the SCCF Marine Lab will begin the third round of sampling over 80 lakes on Sanibel to get an idea if pollution control strategies implemented so far have had any beneficial effect on water quality. The lab previously sampled Sanibel’s lakes in the dry and wet seasons of 2016 and 2018. The study is funded by the City of Sanibel and provides information which is made available on an interactive website called Sanibel Communities for Clean Water (CCW) https://sanibelcleanwater.org/. Most of the lakes on Sanibel are classified as eutrophic – meaning they are polluted by an overabundance of the nutrients nitrogen and phosphorus. The source of these nutrients is The dry and wet season sampling will be complete by September and the fertilizer and to a lesser extent reclaimed waste- new sampling results should be available on the CCW website by Nowater which is used as irrigation on the island’s vember. We can then all take a look and see if the water quality in our golf courses and resorts. Since the City’s found- backyards is improving or needs further attention. If you see us out in your ing, it has worked to reduce water quality issues backyard dipping water from your lake this year, you are observing the 1st and protect the natural qualities of the island step involved in bringing this information to you. Below: Plantings in through ordinances, incentives and projects a lake’s littoral zone at the edge help to clean the lake water. Photo Dana which originated with the Sanibel Plan, a pro- Dettmar, City of Sanibel. gressive plan to protect Sanibel’s natural characteristics. Some of the ordinances and incentives which work to improve the island’s water quality include: The vegetation ordinance, the stormwater ordinance, building codes which reduce impervious surfaces and prevent wetland loss, the fertilizer ordinance, the sewer ordinance and the golf course report card. The Communities for Clean Water website acts as an incentive for communities to become aware of water quality conditions in their backyard and provides them guidelines for improving any issues existing there. The information we collect during sampling also allows residents to track the progress of any water quality improvement activities which they have initiated. Many residents don’t realize the relationship between the abundance of fertilized, irrigated, non-native turf grass and declining water quality. Just remember – a green healthy turfgrass lawn = a green unhealthy lake. Page 1