Match the terms to their definition.

Question

the number of individual organisms born into a population in a given year

the movement of individuals out of a population

the number of individual organisms that die in a population in a given year

the movement of individuals into a population

Answer 1

Here are the terms matched to their definitions:

1. The number of individual organisms born into a population in a given year - Birth rate (or Natality)
2. The movement of individuals out of a population - Emigration
3. The number of individual organisms that die in a population in a given year - Death rate (or Mortality)
4. The movement of individuals into a population - Immigration

Answer 2

In a population of wolves, the birth rate is 4, the death rate is 3, immigration is 2, and emigration is 3. Calculate the population growth by filling in the formula below.

(
+
) – (
+
) =

Since the population growth is
,
the population is
.
In a population of deer, the birth rate is 5, the death rate is 4, immigration is 8, and emigration is 6. Calculate the population growth by filling in the formula below.

(
+
) – (
+
) =

Since the population growth is
,
the population is
.

Answer 3

Let's calculate the population growth for both the wolves and the deer step by step.

For the Wolves:

• Birth Rate = 4
• Death Rate = 3
• Immigration = 2
• Emigration = 3

Using the formula:

\[ (\text{Birth Rate} + \text{Immigration}) - (\text{Death Rate} + \text{Emigration}) = \text{Population Growth} \]

Substituting the values:

\[ (4 + 2) - (3 + 3) = 6 - 6 = 0 \]

Since the population growth is 0, the population is stable.

For the Deer:

• Birth Rate = 5
• Death Rate = 4
• Immigration = 8
• Emigration = 6

Using the same formula:

\[ (\text{Birth Rate} + \text{Immigration}) - (\text{Death Rate} + \text{Emigration}) = \text{Population Growth} \]

Substituting the values:

\[ (5 + 8) - (4 + 6) = 13 - 10 = 3 \]

Since the population growth is 3, the population is increasing.

Summary:

For the wolves:

• \((4 + 2) - (3 + 3) = 0\)
• The population growth is 0, the population is stable.

For the deer:

• \((5 + 8) - (4 + 6) = 3\)
• The population growth is 3, the population is increasing.

Answer 4

GUYSS THE ANSWER IS
4,2,3,3,0
zero and not changing

FOR THE OTHER ONE

5,8,4,6,3
positive and growing

Determine if the limiting factors listed below are density-dependent or density-independent.

industrial pollution

habitat

food

a hurricane

number of mates

hunting by humans

Answer 5

To classify the limiting factors as density-dependent or density-independent, we can use the following definitions:

• Density-Dependent Factors: These factors affect population growth in a manner that is dependent on the population density. They typically include factors that are influenced by the size of the population, such as competition for resources, predation, disease, and availability of mates.

• Density-Independent Factors: These factors affect population growth regardless of the population density. They are typically environmental factors, such as natural disasters, climate, and pollution, that can impact populations irrespective of their size.

Here’s the classification of the factors you listed:

1. Industrial pollution - Density-Independent (affects populations regardless of their density)
2. Habitat - Density-Dependent (availability of habitat can affect population size as density increases)
3. Food - Density-Dependent (limited food resources become more scarce as population density increases)
4. A hurricane - Density-Independent (affects populations regardless of their density)
5. Number of mates - Density-Dependent (availability of mates can restrict breeding opportunities as population density changes)
6. Hunting by humans - Density-Dependent (the impact of hunting may depend on the population density of the species being hunted)

Summary:

• Industrial pollution: Density-Independent
• Habitat: Density-Dependent
• Food: Density-Dependent
• A hurricane: Density-Independent
• Number of mates: Density-Dependent
• Hunting by humans: Density-Dependent

Answer 6

answer is - Industrial pollution: **Density-Independent**
- Habitat: **Density-Dependent**
- Food: **Density-Dependent**
- A hurricane: **Density-Independent**
- Number of mates: **Density-Independent**

Are dams density-dependent or density-independent limiting factors?

Density-dependent

Density-independent

Answer 7

Dams are considered density-independent limiting factors.

Explanation:

Dams alter water flow, habitat availability, and ecosystem dynamics regardless of the population density of the species in the area. While the effects of a dam might influence species populations, the presence or absence of a dam and its management will affect all populations in the same way, regardless of their size or density. Thus, the impact of dams is not contingent upon how many individuals are in the population.

Answer 8

Differentiate between population density and population distribution.

Answer 9

Population density and population distribution are two important concepts in ecology and demography, but they refer to different aspects of how populations are organized in a given area. Here are the distinctions:

Population Density:

• Definition: Population density refers to the number of individuals of a species living in a particular unit area or volume at a given time. It is usually expressed as individuals per unit area (e.g., individuals per square kilometer).
• Importance: It provides a measure of how crowded or sparse a population is in a specific habitat. High population density can lead to increased competition for resources, while low population density might suggest resource abundance, but could also indicate other limiting factors.
• Calculation: It is calculated using the formula: \[ \text{Population Density} = \frac{\text{Total Population}}{\text{Area}} \]

Population Distribution:

• Definition: Population distribution refers to the spatial arrangement or pattern of individuals within a given area. It describes how individuals are spread out in their habitat (e.g., clumped, uniform, or random distribution).
• Importance: Understanding population distribution helps ecologists and resource managers determine how species interact with their environment and each other. Different distribution patterns can affect competition, mate selection, predation, and management strategies.
• Types of Distribution:
  • Clumped: Individuals are grouped together in patches (common in species that rely on social interaction or have uneven resource availability).
  • Uniform: Individuals are evenly spaced (often seen in populations where competition for resources is high).
  • Random: Individuals are spread out in an unpredictable manner (occurs in environments where resources are evenly distributed).

Summary:

• Population Density is a quantitative measure of how many individuals live in a specific area, while Population Distribution describes the pattern of how those individuals are spread out in that area. Both concepts are crucial for understanding ecological dynamics and managing wildlife conservation efforts.