Ecosystem
Q1: Briefly write the difference between detritivores and decomposers.
Answer:
Detritivores are organisms that consume detritus and break it down into smaller particles, like earthworms. Decomposers, on the other hand, are organisms that chemically break down complex organic matter into simpler inorganic substances through the release of enzymes.
Q2: What is ‘R’ in the given equation for ecosystem productivity?
- NPP = GPP – R
Answer:
R’ represents the energy utilized by plants or producers in respiration. It is also referred to as respiratory losses
Q3: Why primary productivity is different in different types of ecosystems?
Answer:
Primary productivity varies in different types of ecosystems due to two main factors:
- Variation in plant species (producers) and their photosynthetic capacity within each ecosystem.
- Dependence on environmental factors and nutrient availability
Ecosystem Notes Class 12 Biology Chapter 12
Class 12 CBSE Biology Chapter 12- Ecosystem: Living organisms interact with one another and their physical surroundings in a functioning ecosystem. The size of ecosystems can vary, from little ponds to enormous forests or seas. According to some ecologists, the entire biosphere is made up of all the regional ecosystems on Earth. It is reasonable to divide the biosphere into two primary categories: terrestrial and aquatic ecosystems because of its enormous size and complexity. Forests, grasslands, and deserts are examples of terrestrial ecosystems, while ponds, lakes, wetlands, rivers, and estuaries are examples of aquatic ecosystems. Additionally, man-made ecosystems such as crop fields and aquariums can also be considered. In this article, we will look at Chapter 12- Ecosystem of Class 12 to gain a better understanding of ecosystems.