Ecology, Biodiversity, and Conservation:

Biodiversity:

• Genetic diversity: Variations in genes within populations.
• Species diversity: Number of different species in an area.
• Ecosystem diversity: Variations in ecosystems that make up a region.

Threats to Biodiversity:

• Habitat destruction: Loss or degradation of habitats due to human activities.
• Pollution: Introduction of harmful substances into the environment.
• Climate change: Long-term alterations in temperature and weather patterns.
• Overexploitation: Excessive use of natural resources.
• Invasive species: Non-native species that harm or displace native species.

Conservation:

• In-situ conservation: Protection of biodiversity within its natural habitat.
• Ex-situ conservation: Preserving and breeding species outside of their natural habitat.
• Sustainable development: Balancing resource use with conservation.
• Red Data Book: IUCN’s list of endangered and protected species.

Ecosystem Services:

• Provisioning services: Obtaining resources like food, water, and timber.
• Regulating services: Controlling climate, air purification, and water filtration.
• Cultural services: Recreational, aesthetic, and spiritual values.
• Supporting services: Producing oxygen, soil formation, and pollination.

Ecological Interactions:

• Competition: Rivalry between organisms for shared resources.
• Predation: Organisms capture and consume other organisms for sustenance.
• Parasitism: One species (parasite) lives on or in another (host) and harms it.
• Mutualism: Mutually beneficial coexistence of two species.
• Commensalism: One species benefits while the other isn’t affected.

Population Ecology:

• Population size: Number of individuals in a particular area.
• Population growth: Increase in population over time.
• Population density: Number of individuals in a unit area.
• Population dispersion: Distribution of individuals within a habitat.

Community Ecology:

• Community structure: Number of species and their interactions.
• Community composition: Relative abundance of species in a community.
• Community dynamics: Changes in composition over time.

Ecosystem Ecology:

• Energy flow: Transfer of energy from producers (plants) through consumers to decomposers.
• Nutrient cycling: Movement of essential elements through living organisms and the environment.
• Trophic levels: Feeding levels in an ecosystem, from producers to top predators.
• Food chains and food webs: Linear and interconnected flow of energy and nutrients.

Biomes:

• Terrestrial biomes: Major land-based ecosystems, like forests, deserts, and tundra.
• Aquatic biomes: Major water-based ecosystems, like oceans, lakes, and wetlands.