Zoology

Ecology: Interaction of organisms with their environment and other organisms.

Organism: Adaptations to the environment; includes morphological, behavioral, and physiological adaptations.
Population: Distribution, density, and dynamics of individuals of the same species.
Community: Interactions among different species (e.g., predation, parasitism, facilitation).
Ecosystem: Interactions between populations/communities and their abiotic (non-living) environment.
Landscape: Larger spatial scale interactions across ecosystems.
Global: Across biomes, capturing global ecological patterns.

Disease Ecology: Understanding disease spread through hosts, vectors, and the environment (e.g., malaria, Lyme disease).
Food Security: Enhancing sustainable agriculture through ecological relationships to ensure nutritious food access.
Pollution Impact: Studying the effects of pollutants (e.g., water contamination) on ecosystems and human health.
Climate Change: Investigating ecosystem shifts due to climate change impacts on health (e.g., heat stress, vector-borne diseases).
Biodiversity and Medicine: Biodiversity's role in discovering medical compounds and maintaining essential ecosystem services.
Natural Disasters: Analyzing ecosystems to mitigate health impacts from disasters like floods and wildfires.

Clumped Distribution: Organisms aggregate in patches due to attractants (e.g., suitable habitats/resources).
Uniform Distribution: Evenly spaced populations due to antagonistic interactions (e.g., territoriality).
Random Distribution: Indifferent placement arises from absence of attractions or repulsions.

Trade-off Concept: Balance organisms strike between competing demands for limited resources, impacting growth/reproduction/survival.
- Example: Early reproduction vs. survival; quantity vs. quality of offspring.

Exponential Growth: Rapid population increase under ideal conditions (e.g., bacteria in a petri dish).
- Shape: J-shaped growth curve.
Logistic Growth: Slowing growth as population approaches carrying capacity.
- Shape: S-shaped (sigmoid) curve.
- Carrying Capacity: Max individuals sustainable by environment based on resources.

Density-Dependent Factors: Regulate population size based on density (e.g., resource competition, predation).
Density-Independent Factors: Affect populations regardless of density (e.g., weather, natural disasters).
Negative Feedback: Stabilizing processes that slow growth as population increases (e.g., resource competition).

Human Population Density: Number of people per unit area (e.g., per square kilometer or mile).
Current Trends: Uneven distribution with higher densities in urban areas.

Past Growth: Slow growth due to limited resources and high mortality until the Industrial Revolution.
Population Milestones: Significant growth reflecting technological and medical advancements.
Future Projections: Slowing growth expected, with predictions of stabilization by the late 21st century.

Aging Population: Increasing proportion of older individuals leads to varying societal impacts (e.g., healthcare strain).

Carrying Capacity: Maximum sustainable population size based on available resources.
Ecological Footprint: Measure of resource demand compared to Earth's regeneration capacity.
Planetary Boundaries: Framework for ecological sustainability; breaches raise risks for ecological stability.

Carrying Capacity: Resource shortages lead to health issues like malnutrition and waterborne diseases.
Ecological Footprint: Pollution impacts health through respiratory issues and disease spread.
Planetary Boundaries: Climate change effects exacerbate health challenges and emergency preparedness.