Nutrient Cycling and Ecosystem Services
Carbon and phosphorus cycles and the value of ecosystem services. (Biology › Ecosystem, NEET UG syllabus.)
What is Nutrient Cycling and Ecosystem Services?
The movement of essential elements (nutrients) through the biotic and abiotic components of an ecosystem.
Key points
- Describe the process of nutrient cycling in an ecosystem.
- Explain the major steps and reservoirs of the carbon cycle.
- Explain the major steps and reservoirs of the phosphorus cycle.
- Identify and categorize different types of ecosystem services with examples.
Common exam trap
Confusing gaseous vs. sedimentary cycles (Carbon is gaseous, Phosphorus is sedimentary).
Definitions
- Term
Nutrient Cycling
- Meaning
The movement of essential elements (nutrients) through the biotic and abiotic components of an ecosystem.
- Term
Carbon Cycle
- Meaning
The biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.
- Term
Phosphorus Cycle
- Meaning
The biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.
- Term
Ecosystem Services
- Meaning
The benefits that humans receive from ecosystems, categorized into provisioning, regulating, cultural, and supporting services.
- Term
Primary Productivity
- Meaning
The rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances.
Learning objectives
Describe the process of nutrient cycling in an ecosystem.
Explain the major steps and reservoirs of the carbon cycle.
Explain the major steps and reservoirs of the phosphorus cycle.
Identify and categorize different types of ecosystem services with examples.
Discuss the importance of nutrient cycling and ecosystem services for human well-being.
Analyze the impact of human activities on these cycles and services.
Prerequisites
Basic understanding of photosynthesis and respiration.
Knowledge of food chains and food webs.
Concept of producers, consumers, and decomposers.
General understanding of ecosystem components (biotic and abiotic).
Common mistakes
Confusing gaseous vs. sedimentary cycles (Carbon is gaseous, Phosphorus is sedimentary).
Misunderstanding the primary reservoir for each cycle.
Not recognizing the role of decomposers in both cycles.
Failing to differentiate between the categories of ecosystem services.
Underestimating the human impact on these cycles (e.g., burning fossil fuels, deforestation, agricultural runoff).
Keywords
Nutrient cycling
Carbon cycle
Phosphorus cycle
Biogeochemical cycles
Ecosystem services
Provisioning services
Regulating services
Cultural services
Supporting services
Photosynthesis
Respiration
Decomposition
Weathering
Reservoirs
Practice preview
Which of the following is the largest reservoir of carbon on Earth?…
easy
A key distinguishing feature of the phosphorus cycle compared to the carbon and nitrogen cycles is the absence of a significant:…
easy
Which of the following is an example of an ecosystem service?…
easy