Problem Analysis:
The worksheet provided focuses on
Ecology and Ecosystems and
Feeding Relationships. It includes two main sections:
1.
Definitions of Ecological Terms:
- Population
- Community
- Ecosystem
- Habitat
- Niche
- Saprophyte
- Scavenger
2.
Food Web Analysis:
- A food web diagram is provided, showing various organisms and their feeding relationships.
- Questions are asked based on the food web:
- a) Which organisms are the tertiary consumers?
- b) Which organisms are the primary consumers?
---
Solution:
####
Section 1: Definitions of Ecological Terms
1.
Population:
- A population refers to all the individuals of a single species living in a specific area at a given time. These individuals interact with each other and share common resources.
2.
Community:
- A community consists of all the populations of different species living and interacting in a specific area at a given time. Communities include both biotic (living) and abiotic (non-living) factors that influence the organisms.
3.
Ecosystem:
- An ecosystem is a functional unit consisting of all the living organisms (biotic components) and non-living elements (abiotic components) in a specific area, interacting as a system. Examples include forests, lakes, and grasslands.
4.
Habitat:
- A habitat is the natural environment or place where an organism lives, which provides the necessary conditions for its survival, such as food, shelter, and space.
5.
Niche:
- A niche describes the role and position of a species within its environment, including how it obtains food, reproduces, and interacts with other organisms. It encompasses both the physical space occupied by the organism and its functional role in the ecosystem.
6.
Saprophyte:
- A saprophyte is an organism that obtains nutrients from dead organic matter. Examples include fungi and some bacteria that decompose dead plants and animals.
7.
Scavenger:
- A scavenger is an organism that feeds on dead animals (carrion). Scavengers play a crucial role in ecosystems by breaking down dead organisms and recycling nutrients back into the environment.
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####
Section 2: Food Web Analysis
The food web diagram shows the following organisms and their feeding relationships:
-
Producers: Grass and Trees (produce their own food through photosynthesis).
-
Primary Consumers: Deer (herbivore), Mouse, Cricket (both herbivores).
-
Secondary Consumers: Frog (eats crickets), Snake (eats mice).
-
Tertiary Consumers: Hawk (eats frogs and snakes).
Now, let's answer the questions based on the food web:
#####
a) Which organisms are the tertiary consumers?
- Tertiary consumers are organisms that feed on secondary consumers. In the food web:
- The
Hawk preys on both the
Frog (secondary consumer) and the
Snake (secondary consumer).
- Therefore, the
Hawk is the tertiary consumer.
Answer:
\[
\boxed{\text{Hawk}}
\]
#####
b) Which organisms are the primary consumers?
- Primary consumers are organisms that directly feed on producers (plants). In the food web:
- The
Deer eats
Trees.
- The
Mouse eats
Grass.
- The
Cricket eats
Grass.
- Therefore, the primary consumers are
Deer,
Mouse, and
Cricket.
Answer:
\[
\boxed{\text{Deer, Mouse, Cricket}}
\]
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Final Answers:
1.
Tertiary Consumers: \(\boxed{\text{Hawk}}\)
2.
Primary Consumers: \(\boxed{\text{Deer, Mouse, Cricket}}\)
Parent Tip: Review the logic above to help your child master the concept of ecology worksheet pdf.
