Oligotrophic lakes are those bodies of water that have a poor nutrient supply and little to no plant life while eutrophic lakes have a good nutrient supply and support high plant growth. The root word "trophic" means nutrition or growth, and remembering that is an easy way of remembering the basic concept indicated by the words oligotrophic and eutrophic. A combination of different factors can lead to a lake being either oligotrophic or eutrophic, including human land management and use, the water's natural temperature and the lake's size, including shape, depth and volume.Know More
Oligotrophic and eutrophic lakes can be described in terms of productivity, in which an oligotrophic lake, thanks to its low nutrient level and generally inhospitable environment for life, is said to be less productive while the more life-sustaining eutrophic lake type is said to be more productive.
In general, lakes can progress from being oligotrophic when they are first formed to being eutrophic as they mature and gain the qualities of a life-sustaining ecosystem. For example, a lake that forms in a land depression caused by a receding glacier may start out with very little life and nutrients, but microorganisms that are able to gain a foothold there begin digesting and composting organic material, making for a more fertile nutrient base that beings to sustain more plant life.Learn more about Bodies of Water
There are several different types of natural water forms within and around the Philippines, including channels, swamps, straits, gulfs, seas, bays, waterfalls, rivers and lakes. Being an archipelago, the country's coastline would measure roughly 10,847 miles if laid end-to-end.Full Answer >
A river is characterized by continuously flowing water from an upland source into lakes, wetlands or the sea. Rivers are fed by tributary streams or springs, and they include a river channel, shoreline and a floodplain.Full Answer >
Erosion affects the environment by stripping away top soil on agricultural land, damaging delicate coastal areas, causing health problems in humans and contaminating bodies of water with sediment that can harm plant and animal life. Erosion damages farm land by removing nutrient-rich soil needed to grow plants and by exposing lower-quality soil. It also damages crops and causes greater runoff of needed water.Full Answer >
The Nile River is important because it provides Egypt with irrigation, hydroelectric power, a steady water supply and rich soil. It was the lifeblood of ancient Egyptian transport, commerce and agriculture, and remains crucial for sustaining life in the barren deserts of Egypt today. At over 4,000 miles long, it is the longest river in the world.Full Answer >