Algal blooms in oligotrophic lakes are
very rare
To determine the correct option, we must first understand what an algal bloom is and the characteristics of oligotrophic lakes.
An algal bloom occurs when algae grow rapidly, often due to an increase in nutrients like nitrogen and phosphorus. These blooms can cause problems by depleting oxygen in water bodies, leading to dead zones where aquatic life cannot survive.
An oligotrophic lake is characterized by a low concentration of nutrients and consequently low productivity in terms of aquatic life. Such lakes have clear waters, with minimal plant life and algae because of the limited availability of nutrients.
Given these characteristics, let's examine why the correct answer is "very rare":
- Oligotrophic lakes have low nutrient levels, which do not support the high growth rates needed for algal blooms.
- Therefore, algal blooms are uncommon due to this scarcity of essential nutrients.
Let's evaluate the options:
- Very frequent: Not correct. Algal blooms need high nutrient levels, which are absent in oligotrophic lakes.
- Frequent: Not correct for the same reason; nutrient limitation doesn't support frequent blooms.
- Very rare: Correct. The scarcity of nutrients makes algal blooms a rare occurrence in oligotrophic lakes.
- Widespread: Not correct. Algal blooms cannot be widespread in oligotrophic lakes due to the lack of nutrients.
Thus, the correct answer is that algal blooms in oligotrophic lakes are very rare.
Similar Questions
Oligotrophic lakes are characterized by:
Important Questions from Ecology and Ecosystem
- Consider the following statements and choose the correct one:
A. 'Bio' is a Greek word means life
B. Biosphere is an integral part of the earth system which supports all kinds of life
C. All the biological components of the Earth living as well as the dead, fall in the category of biosphere.
D. The term 'Biosphere' has been coined by Peter Suess.
Choose the correct answer from the options given below : Which of the following statements are correct about nutrient cycle ?
A. Carbon dioxide gas which makes up about 0.040% of the volume of the earth's atmosphere
B. Specialised bacteria convert most of the $NH_3$ and $NH_4^+$ in the soil to nitrate ions $NO_3$-
C. Phosphorus does cycle through the atmosphere and its cycle is fast
D. Much of the earth's sulfur is stored underground in rocks and minerals
Choose the most appropriate answer from the options given below:- Which of the following statements are correct about 'ecological succession'?
A. Gradual Change in species composition in a given area is called ecological succession
B. Primary ecological succession does not involve the gradual establishment of communities in lifeless areas
C. Secondary ecological succession means series of ecosystems of different species develop in places containing soil
D. Ecological succession is not an important ecosystem service
Choose the most appropriate answer from the options given below : - Food web consists of different types of __________.
The role and position of an organism in the ecosystem encompassing both the physical space it occupies and its functional role with in the community is known as:
