Conservation Revision Notes

A sustainable resource is naturally renewed or replaced at the same rate it is consumed or extracted.

This balance prevents the resource from running out over time.

• Replenishment rate equals extraction rate.
• Ensures long-term availability of the resource.

Using resources sustainably maintains ecological balance and preserves resources for future generations.

Unsustainable use leads to depletion and environmental damage.

• Prevents resource exhaustion.
• Supports environmental health and biodiversity.

Forests managed by replanting trees at the same rate as logging.

Fish populations harvested at rates allowing natural reproduction to maintain numbers.

• Sustainable forestry involves controlled logging and replanting.
• Sustainable fishing includes quotas and protected breeding areas.

Selective logging removes some trees while leaving others to grow, allowing the forest to regenerate naturally.

Replanting trees after logging helps maintain forest cover and biodiversity.

• Controlled logging prevents overharvesting.
• Replanting supports forest regeneration.

Fishing quotas limit the number of fish caught to prevent overfishing.

Protecting breeding areas ensures fish can reproduce safely and maintain population levels.

• Regulated fishing maintains population balance.
• Breeding area protection supports reproduction.

Sustainable practices prevent resource depletion and support ecosystem health.

They ensure resources remain available for future generations and maintain biodiversity.

• Prevents overexploitation.
• Maintains ecological balance and resource availability.

Climate change alters habitats and food availability, making survival difficult for many species.

Habitat loss from activities like deforestation reduces living space and resources.

• Climate change disrupts ecosystems and food chains.
• Habitat destruction limits shelter and breeding sites.

Hunting and overexploitation reduce population sizes faster than species can reproduce.

Pollution poisons organisms and damages habitats, affecting health and reproduction.

• Excessive hunting lowers population numbers.
• Pollutants harm organisms and ecosystem balance.

Introduced species may compete with native species for resources, prey on them, or introduce diseases.

Native species often lack defenses against these threats, leading to population declines.

• Competition reduces native species' access to food and space.
• Predation and disease from invasive species increase mortality.

Monitoring endangered species' habitats helps detect threats such as habitat destruction or pollution early. Protecting these habitats ensures species have safe environments to live, feed, and reproduce, which is essential for their survival.

• Regular habitat checks identify environmental changes.
• Legal protection can prevent habitat loss.
• Maintaining natural conditions supports species' life cycles.

Education raises awareness about the importance of endangered species and the threats they face. It encourages communities and individuals to support conservation efforts and adopt behaviors that reduce harm to species and their habitats.

• Informs the public about conservation needs.
• Promotes responsible actions to protect species.
• Builds community support for conservation programs.

Captive breeding programs breed endangered animals in controlled environments to increase their numbers and potentially reintroduce them into the wild. Seed banks store seeds of endangered plants, preserving genetic diversity and enabling future restoration of plant populations.

• Captive breeding boosts animal populations safely.
• Seed banks safeguard plant genetic material.
• Both methods help recover species numbers over time.

Educating communities about the value of forests and sustainable practices reduces harmful activities like illegal logging and encourages responsible resource use.

• Raises awareness of forest importance.
• Encourages sustainable harvesting.
• Supports community involvement in conservation.

Protected areas legally restrict damaging activities such as logging and development, preserving habitats. Quotas limit the amount of wood harvested to prevent overexploitation and allow forests to regenerate.

• Protected zones safeguard ecosystems.
• Quotas control resource extraction levels.
• Both reduce human impact on forests.

Replanting trees in deforested areas helps restore habitats, maintain biodiversity, and support ecosystem functions like carbon storage and soil protection.

• Replaces lost trees.
• Supports wildlife habitats.
• Promotes ecosystem recovery.

Education informs fishers about sustainable practices to avoid overfishing. Closed seasons prohibit fishing during breeding times, allowing fish to reproduce and increase population size.

• Promotes responsible fishing behavior.
• Protects fish during critical breeding periods.
• Supports population recovery.

Protected areas restrict fishing in certain zones, providing safe habitats. Using nets with specific mesh sizes prevents catching juvenile fish, allowing them to mature and reproduce.

• Creates fish refuges free from fishing pressure.
• Selective nets reduce juvenile catch.
• Helps maintain healthy fish populations.

Quotas limit the total fish catch to sustainable levels, preventing overexploitation. Monitoring tracks fish populations and fishing activities to assess conservation effectiveness and guide management decisions.

• Controls fishing pressure.
• Ensures sustainable harvests.
• Provides data for adaptive management.

Conservation programs help maintain or increase the variety of living organisms in an area, which supports ecosystem stability. They also protect species at risk of extinction by preserving their populations and habitats.

• Supports ecological balance and resilience.
• Preserves genetic diversity.
• Prevents loss of species and their roles.

Programs safeguard ecosystems vulnerable to damage, ensuring they continue to perform essential functions like nutrient cycling, which recycles nutrients for plant growth and soil fertility.

• Maintains healthy habitats for many species.
• Supports processes like nutrient cycling.
• Prevents ecosystem degradation.

Conservation helps secure resources such as food, medicine, fuel, and genetic material that ecosystems provide, which are vital for human well-being and future scientific research.

• Protects natural sources of medicines and food.
• Preserves genetic material for breeding and research.
• Supports sustainable resource use.

AI involves collecting sperm from a male and manually inserting it into a female's reproductive tract to achieve fertilization without natural mating. This helps when animals cannot mate naturally due to separation or behavioral issues.

• Bypasses need for natural mating.
• Increases chances of fertilization in captivity.
• Reduces stress and risk of injury during breeding.

IVF fertilizes eggs with sperm outside the female's body in a laboratory. The resulting embryos are then implanted into the female to develop. This technique helps overcome fertility problems and increases reproductive success.

• Fertilization occurs externally.
• Embryos implanted to develop normally.
• Useful when natural mating or fertilization is difficult.

Both AI and IVF improve breeding success in captive programs, support genetic diversity by combining genetic material from different individuals, and help increase populations of endangered species.

• Supports population growth in captivity.
• Maintains or increases genetic diversity.
• Overcomes reproductive challenges in endangered species.

When a species' population size decreases, fewer individuals contribute genes to the gene pool. This reduces the variety of alleles present, leading to lower genetic diversity.

Lower genetic diversity means there are fewer different traits available for natural selection to act upon, limiting the species' ability to adapt to environmental changes such as diseases or climate shifts.

• Smaller populations have fewer breeding individuals.
• Genetic variation decreases as population size declines.
• Reduced gene pool limits adaptability.

Reduced genetic diversity increases the risk of inbreeding, which can cause harmful genetic defects and reduce overall fitness.

Species with low genetic variation are less able to cope with new threats, making them more vulnerable to extinction.

Maintaining genetic diversity is crucial for long-term survival and resilience of species.

• Inbreeding risk rises in small populations.
• Harmful genetic traits become more common.
• Survival chances decrease with low diversity.

Conservation efforts aim to maintain or increase population sizes to preserve genetic diversity.

Protecting habitats and reducing threats help prevent population declines.

Genetic monitoring can guide strategies to support species adaptability and survival.

• Conservation focuses on sustaining population size.
• Habitat protection supports genetic diversity.
• Genetic diversity monitoring informs conservation.