Conditions lead to monomictic lake turnover12/31/2023 Road salt, for example, is becoming an increasing problem both to natural communities and as a contaminant in household wells. Water traveling on the ground or seeping through the ground also carries dissolved minerals and chemicals. Thus, road construction and development activities near this lake type should strive to minimize particulate-laden run-off into this community. While still suspended in the water, these particulates make it difficult for aquatic animals to find food after settling to the bottom of the lake, these particulates bury small plants and animals and alter the natural functions of the community in many other ways. Water traveling over-the-ground as run-off usually carries an abundance of silt, clay, and other particulates during (and often after) a construction project. When considering road construction and other development activities, minimize actions that will change what water carries and how water travels to this lake community, both on the surface and underground. Development and Mitigation Considerations Identify the potential impacts of beach use, if present along the the lakeshore. Prevent the spread of non-native species into or around the lakes. For lakes with perimeter trails consider reducing trail width, evaluating current uses, and stabilizing heavy impact areas along the trail with native materials to prevent runoff and erosion into the lake. Impervious surfaces that rapidly divert water to the pond should be avoided. Projects that occur near this community must consider the proximity of the development to this lake and the potential for changing how water flows, both above ground and below ground, into this waterbody. Conservation Strategies and Management PracticesĬonsider how water flows around and into this lake community. High visitor use of lake perimeter trails is a lesser threat. Run-off from development and/or clearing in the immediate lake watershed may be a threat. The greatest threat would be altering hydrology or mixing status, but these lakes have so few species and such harsh conditions that they are unlikely to be altered or used very much. Prevent the spread of invasive exotic species into the lake through appropriate direct management, and by minimizing potential dispersal corridors. Restore lakes that have been affected by unnatural disturbance (e.g., remove obsolete impoundments and ditches in order to restore the natural hydrology). If a lake must be crossed, then bridges and boardwalks are preferred over filling and culverts. For example, roads should not be routed through the lakeshore buffer area. Avoid habitat alteration within the lake and surrounding landscape. If possible, minimize the number and size of impervious surfaces in the surrounding landscape. Buffer width should take into account the erodibility of the surrounding soils, slope steepness, and current land use. Where practical, establish and maintain a lakeshore buffer to reduce storm-water, pollution, and nutrient run-off, while simultaneously capturing sediments before they reach the lake. The number and acres of meromictic lakes in New York are probably comparable to historical numbers.Ĭonservation and Management Conservation Overview The number and acres of meromictic lakes in New York have probably remained stable in recent decades as a result of local lake protection efforts and state wetland protection regulations. The current trend of this community is probably stable for occurrences on protected land, or declining slightly elsewhere due to development in the surrounding landscape and recreational overuse. This community is limited to areas of the state where glacial waterfalls scoured deep plungepools into the bedrock creating steep-sloped margins that prevent winds from mixing the water. About three documented occurrences have good viability and are protected on public land. There are probably less than 20 occurrences statewide, and the total acreage is relatively small compared to other more common lake types. Calcium carbonate reflects the green wavelength, thus giving Green Lake its distinctive green color (NYS DEC). Green Lake got its name from its unusual green color from high levels of calcium carbonate, and not phytoplankton or algae that often give lakes a green appearance when their populations are high. The best-known example of meromictic lake in New York is Green Lake in the town of Fayetteville.
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