Get premium membership and access questions with answers, video lessons as well as revision papers.
Human disturbances are caused by:
a) Partially or totally destroying or replacing either the natural plant cover.
b) Introducing new (alien or exotic) species of plants.
c) Altering on or more environmental factors.
d) Or adding foreign substances to the ecosystem such as pollutants or pesticides.
These disturbances can be interrelated for example: clearing of forest for crop production not only means removal of the natural vegetation, but it also profoundly alters the native animal population, the local micro-climate and the soil types. Use of pesticides to control weeds for example usually interferes with the recolonisation of plant.
- Disturbances can have devastating consequences, often in the most unexpected ways. Indirect influences, resulting from the introduction, may pose as many problems as the direct or obvious changes.
- We know little about these complex interrelationships in nature between animals or between plants and animals. We know even less about human beings part in influencing these relationships.
francis1897 answered the question on February 27, 2023 at 13:48
- Briefly describe the vegetation of East Africa(Solved)
Briefly describe the vegetation of East Africa
Date posted: February 27, 2023. Answers (1)
- What are the general characteristics of the climate of East Africa?(Solved)
What are the general characteristics of the climate of East Africa?
Date posted: February 27, 2023. Answers (1)
- With the aid of examples, explain parasitism(Solved)
With the aid of examples, explain parasitism
Date posted: February 27, 2023. Answers (1)
- Describe the spatial separation of species(Solved)
Describe the spatial separation of species
Date posted: February 27, 2023. Answers (1)
- What is commensalism?(Solved)
What is commensalism?
Date posted: February 27, 2023. Answers (1)
- Organisms have evolved different strategies for mitigating the effects of competition. What are these strategies?(Solved)
Organisms have evolved different strategies for mitigating the effects of competition. What are these strategies?
Date posted: February 27, 2023. Answers (1)
- Competition is one biological factor which influences the distribution of a species. Discuss(Solved)
Competition is one biological factor which influences the distribution of a species. Discuss
Date posted: February 27, 2023. Answers (1)
- What are the features of competition in an ecosystem?(Solved)
What are the features of competition in an ecosystem?
Date posted: February 27, 2023. Answers (1)
- Describe the concept of competition as used in Biogeography(Solved)
Describe the concept of competition as used in Biogeography
Date posted: February 27, 2023. Answers (1)
- Define the nature of the Community(Solved)
Define the nature of the Community
Date posted: February 27, 2023. Answers (1)
- Mention some important concepts of succession(Solved)
Mention some important concepts of succession
Date posted: February 27, 2023. Answers (1)
- What are the stages of the primary ecological succession?(Solved)
What are the stages of the primary ecological succession?
Date posted: February 27, 2023. Answers (1)
- Describe the pyramids of numbers Biomass and Energy(Solved)
Describe the pyramids of numbers Biomass and Energy
Date posted: February 27, 2023. Answers (1)
- What are the patterns and controls of Primary Production in the World's Ecosystems?(Solved)
What are the patterns and controls of Primary Production in the World's Ecosystems?
Date posted: February 27, 2023. Answers (1)
- Is there an Upper Limit to Primary Production?(Solved)
Is there an Upper Limit to Primary Production?
Date posted: February 27, 2023. Answers (1)
- Describe the Process of Primary Production(Solved)
Describe the Process of Primary Production
Date posted: February 27, 2023. Answers (1)
- What is the difference between autotrophs and heterotrophs?(Solved)
What is the difference between autotrophs and heterotrophs?
Date posted: February 27, 2023. Answers (1)
- Describe the flow of energy through the ecosystem(Solved)
Describe the flow of energy through the ecosystem
Date posted: February 27, 2023. Answers (1)
- Discuss the following factors in the ecosystem:
a) Fire
b) Population
c) Anthropogenic
(Solved)
Discuss the following factors in the ecosystem:
a) Fire
b) Population
c) Anthropogenic
Date posted: February 27, 2023. Answers (1)
- Explain the topographic factors in the ecosystem(Solved)
Explain the topographic factors in the ecosystem
Date posted: February 27, 2023. Answers (1)