Asked by Helmut Andres Florencia Roldan on Jul 08, 2024
Verified
What is a characteristic of an oligotrophic lake?
A) It has low net primary productivity.
B) It has murky brown or green water.
C) It has a dense fish population.
D) It has an abundance of phytoplankton.
Oligotrophic Lake
A type of lake characterized by low nutrient levels, clear waters, and relatively low productivity of plant and animal life.
Net Primary Productivity
The rate at which plants in an ecosystem produce net useful chemical energy; essentially, the amount of biomass created minus the amount used by plants for respiration.
Phytoplankton
Microscopic plant-like organisms that live in aquatic environments, forming the base of many aquatic food webs and producing a significant portion of Earth's oxygen.
- Describe the characteristics of oligotrophic and eutrophic lakes.
Verified Answer
SS
Sephora SaintGeorgesJul 13, 2024
Final Answer :
A
Explanation :
Oligotrophic lakes have low nutrient levels (especially phosphorus and nitrogen) and low levels of primary productivity. This means that there is less production of organic matter by algae and other primary producers, leading to a lower overall food chain and less energy available for higher trophic levels like fish.
Learning Objectives
- Describe the characteristics of oligotrophic and eutrophic lakes.