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Questions and Answers
In a rapidly changing environment, what is the most significant advantage of high species diversity within an ecosystem?
In a rapidly changing environment, what is the most significant advantage of high species diversity within an ecosystem?
- It ensures that all available resources are utilized at maximum efficiency, reducing competition.
- It leads to a more stable population size for each species, preventing drastic fluctuations.
- It guarantees that at least some species will possess traits that enable them to adapt and survive. (correct)
- It promotes a faster rate of mutation, thereby accelerating evolutionary processes across all species.
How does exceeding the carrying capacity affect a population's growth rate?
How does exceeding the carrying capacity affect a population's growth rate?
- The growth rate remains constant as the population adapts to the increased resource availability.
- The growth rate stabilizes as the population reaches a new equilibrium with its environment.
- The growth rate increases exponentially due to heightened competition and natural selection.
- The growth rate decreases as resources become limited, leading to increased mortality or decreased natality. (correct)
Which of the following exemplifies an indirect economic value of biodiversity?
Which of the following exemplifies an indirect economic value of biodiversity?
- The role of forests in regulating water cycles and preventing soil erosion. (correct)
- Cultivating ornamental flowers for commercial sale.
- Using medicinal plants to develop new drugs.
- Harvesting timber from a forest for construction.
Which of the following activities primarily reflects the aesthetic value of biodiversity?
Which of the following activities primarily reflects the aesthetic value of biodiversity?
A population pyramid showing a broad base and a narrow top indicates what about the population?
A population pyramid showing a broad base and a narrow top indicates what about the population?
How does 'fecundity' influence population growth?
How does 'fecundity' influence population growth?
What is the primary difference between active and passive dispersal in the context of population pressure?
What is the primary difference between active and passive dispersal in the context of population pressure?
What condition defines exponential population growth?
What condition defines exponential population growth?
Flashcards
Direct Economic Value
Direct Economic Value
The use of an organism itself for economic gain.
Indirect Economic Value
Indirect Economic Value
Benefits provided by an organism without directly using it.
Aesthetic Value
Aesthetic Value
The use of an organism for visual or artistic enjoyment.
Age Distribution
Age Distribution
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Population Pyramid
Population Pyramid
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Fecundity
Fecundity
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Population Pressure
Population Pressure
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Carrying Capacity
Carrying Capacity
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Study Notes
- Adaptation and survival of population is the topic
- The objectives are to explain how species diversity increases the probability of adaptation and survival of organisms in a changing environment, and to explain the relationship between population growth and carrying capacity
Biodiversity
- Biodiversity refers to the variety of life on earth
- Biodiversity refers to every living thing, including bacteria, plants, animals, and humans
- Biodiversity plays a role in the stability of an environment
- Living organisms are valuable in different ways
- According to a fact, there are 8.7 million animals
- 6.5 million land species
- 2.2 million marine species
- 15 million plants
- Many species are still undiscovered
Categories of the value of species in Biodiversity
- Direct Economic Value is when the organism itself is being used
- Indirect Economic Value is when an organism provides benefits without using the organism itself
- Aesthetic Value is when an organism is being used for visual or artistic enjoyment
- Examples of values of species:
- Fruits being eaten is a direct economic
- Trees providing shade is indirect economic
- Ornamental plants in a garden are aesthetic
- Animal skin as a belt is direct economic
- Guava leaves as medicine is direct economic value
- Animal meat for dishes is direct economic
- Plants providing oxygen is indirect economic value
- Bamboo used for nipa hut is direct economic
- Plant on a centre table is aesthetic
- Fish in an aquarium is aesthetic
Feature of Population
- Age Distribution refers to the number of organisms of each age in a given population
- Pre-reproductive juveniles
- Reproductive adults
- Post-reproductive adults
- Population Pyramid refers to age structure of a given population
- Fecundity is the number of offspring of a given individual or population over time
- Population Pressure is the change in the environment and the dispersal of individuals following an increase in the intensity of population
- Active Dispersal- Whole Organism
- Passive Dispersal- Disseminules (Part of an Organism that can reproduce)
- Population Density is the number of organisms in a given area
- Population Density = Number of Individuals / Land Area
- Population Growth is expected as the size of the population increases rapidly and will decline when the majority of the members are at the post-reproductive category
- Birth Rate (Natality)
- Death Rate (Mortality)
- Population Size is the total number of members of a population
- Stability exists if an ecosystem can regulate itself and stand even after an event
- Exponential Growth is distinguished by a constant birth rate over time that is not influenced by lack of food or the presence of sickness
- Carrying Capacity is the maximum number of individuals for a particular species that the environment can "carry" or sustain
- Limiting Factor are key factors that limit or reduce a population size by lowering birth rates, increasing the death rates or encouraging migration
- Density Dependent Limiting Factor is where the population's growth is affected directly by population density or the organisms themselves
- Diseases and parasites
- Competition for resources
- Predation
- Emigration
- Density Independent Limiting Factor is where the population growth has nothing to do with the population's density
- Natural disasters
- Temperature
- Sunlight
- Human activities in the environment
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Description
Explore how species diversity enhances adaptation and survival in changing environments. Learn about the relationship between population growth and carrying capacity. Discover the direct, indirect, and aesthetic values of species in biodiversity, including the estimated millions of species on Earth.
