. Cottage country : an environmental manual for cottagers. Cottages; Vacation homes; Environmental protection; Pollution. When excmive nutrienh entering a lake resuil in heavy growths of algae and weeds, the bottom waters are often depleted of dissolved oxygen when these plants decompose. Cold-water ipecies o/fish are forced to enter the warm surface waters to obtain oxygen where the high temperatures mas be fatal. Ih'CDiiifxjslliiiii I if plant malter al the kike hiitUmi can lead to death of deep-water specie.^; for analysis. (MOE Aquatic Biology- Section, Aquatic Plant Unit (416) 2^5- 5792).
. Cottage country : an environmental manual for cottagers. Cottages; Vacation homes; Environmental protection; Pollution. When excmive nutrienh entering a lake resuil in heavy growths of algae and weeds, the bottom waters are often depleted of dissolved oxygen when these plants decompose. Cold-water ipecies o/fish are forced to enter the warm surface waters to obtain oxygen where the high temperatures mas be fatal. Ih'CDiiifxjslliiiii I if plant malter al the kike hiitUmi can lead to death of deep-water specie.^; for analysis. (MOE Aquatic Biology- Section, Aquatic Plant Unit (416) 2^5- 5792). Pine Pollen Problems Pine pollen, a mustard yellow powder found floating on the water surface in June, is frequently mistaken for an oil or chemical spill. Nevertheless, the yellow scum is natural and not a health hazard. Yellow pollen from coniferous trees or sandy brown or gray pollen from deciduous trees is most prevalent in June. It finds its way into the lakes and streams, or accumulates along shorelines and beaches when high winds transport it from surrounding forests. It is buoyant and easily blown across the surface of the water. How to Limit Nutrients Like humans, aquatic plants and algae require a balanced "diet" for growth. Other special requirements, including light and temperature, are needed for certain algae and plants. Chemical elements such as nitrogen, phosphorus, carbon, and several others are also required, and must be in a form available for uptake by plants and algae. Algal growth can be limited by a scarcity of any single "critical" nutrient. Nitrogen and phosphorus are usually considered "critical" nutrients because they are usually in scarce supply in natural waters, particularly in Precambrian Shield Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original wor
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