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How Temperature and Lake works in Aquatic Ecosystem

How Temperature and Lake works in Aquatic Ecosystem

TEMPERATURE

  • The range of temperature in water bodies is low as compared to the range of temperature on land.
  • As a result, aquatic organisms develop tolerance to narrow range of temperature.
  • Slight changes in the temperature of water body can cause large threats to the survival of many species.

Hydroponics

  • Hydroponics is a method of growing plants without soil, using mineral nutrient solutions in a water solvent.
  • Terrestrial plants may be grown with only their roots exposed to the mineral solution, or the roots may be supported by an inert medium, such as gravel.
  • The nutrients in hydroponics can be from fish waste, duck manure, or normal nutrients.              How Temperature and Lake works in Aquatic Ecosystem

LAKE ECOLOGY/LAKE ECOSYSTEM

  • According to National Lake Conservation Programme, lakes are standing water bodies with minimum depth of 3 m and with minimum area of 10 hectares.
  • With the passage of time, lakes undergo ageing as mineral and organic matter gradually fill the lakes. This is called ageing of lakes.

Classification of Lakes

Lakes are classified into many types based on multiple criteria as detailed below.

Salinity Level

On the basis of salinity level, lakes are classified into three types:

  1. Freshwater lakes: These lakes have salinity level up to five parts per thousand parts.
  2. Brackish water lakes: These lakes have salinity level of more than five parts per thousand parts, but less than 35 parts per thousand. Brackish water lakes may be located in coastal as well as inland regions.                            How Temperature and Lake works in Aquatic Ecosystem
  3. Saline lakes: These lakes have salinity level of 35 parts per thousand or more.

Nutrient Content

  • On the basis of nutrient content, lakes are classified as follows:
  1. Oligotrophic (very low nutrient content)
  2. Mesotrophic (medium nutrient content)
  3. Eutrophic (high nutrient content).                                  How Temperature and Lake works in Aquatic Ecosystem
  • Vast majority of lakes in India are either eutrophic or mesotrophic because of the following reasons:
  • Large part of India experiences tropical climate. Tropical climate favours large amount of biodiversity.
  • Large amount of biodiversity further leads to high organic content in water bodies.
  • Nutrients from the surroundings enter into water bodies. For instance, fertiliser-rich water enters into water bodies.

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Environment & Biodiversity

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