Textbook Question
Devegetation has what effect on ecosystem dynamics?
a. It increases belowground biomass.
b. It increases nutrient export.
c. It increases NPP.
d. It increases soil organic matter.
984
views
52. Ecosystems
Introduction to Ecosystems
1:12 minutesProblem 6
Textbook Question
Explain why decomposition rates in a field in Nebraska would differ from the decomposition rates in a field in the Amazon. How do decomposers regulate nutrient availability in ecosystems?
Verified step by step guidance1
Identify the environmental factors affecting decomposition: Decomposition rates vary primarily due to differences in climate, soil type, and the diversity of decomposer organisms. In this case, Nebraska and the Amazon have vastly different climates, which is the first point of comparison.
Compare the climates of Nebraska and the Amazon: Nebraska experiences a temperate climate with cold winters and hot summers, which can slow down decomposition during extreme temperatures. In contrast, the Amazon has a tropical rainforest climate with high temperatures and humidity year-round, which accelerates decomposition.
Consider the role of decomposer organisms: The Amazon rainforest has a higher biodiversity, including a wide variety of decomposers like bacteria, fungi, and insects, which enhances the decomposition process. Nebraska, with its less diverse ecosystem, might have fewer types of decomposers, potentially slowing the decomposition process.
Discuss the impact of soil type and moisture: Soil type and moisture levels also influence decomposition rates. The Amazon's rich, moist soil promotes faster decomposition compared to the often drier and sometimes frozen soil found in Nebraska fields.
Explain how decomposers regulate nutrient availability: Decomposers break down dead organic material into simpler inorganic substances, releasing nutrients such as nitrogen and phosphorus back into the soil. This process is crucial for nutrient cycling, making nutrients available to plants and other organisms in the ecosystem, thereby supporting new growth and maintaining ecological balance.
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Video duration:
1mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Decomposition Rates
Decomposition rates refer to the speed at which organic matter is broken down by decomposers, such as bacteria and fungi. These rates are influenced by environmental factors like temperature, moisture, and the chemical composition of the organic material. In warmer, wetter climates like the Amazon, decomposition occurs more rapidly due to higher microbial activity compared to cooler, drier regions like Nebraska.
Recommended video:
Guided course
07:08
Metabolic Rate
Decomposers
Decomposers are organisms that break down dead organic material, recycling nutrients back into the ecosystem. They play a crucial role in nutrient cycling by converting complex organic substances into simpler compounds that can be utilized by plants. The diversity and abundance of decomposers can vary significantly between ecosystems, affecting the overall nutrient availability.
Recommended video:
Guided course
02:25Biomagnification and Decomposers
Nutrient Availability
Nutrient availability refers to the presence of essential nutrients in forms that can be absorbed by plants and other organisms. Decomposers enhance nutrient availability by breaking down organic matter, releasing nutrients like nitrogen and phosphorus into the soil. This process is vital for maintaining soil fertility and supporting plant growth, which in turn sustains the entire food web.
Recommended video:
Guided course
03:25Soil Nutrients
4:07mWatch next
Master Introduction to Ecosystems with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice