Threats to Biodiversity and the Healthy Society
By SCIENTHESIS — P3 Lesson
What is biodiversity?
Biodiversity is the variety of life on Earth — the different species, genes, and ecosystems that support food, medicine, clean air and water, and functioning ecosystems. Healthy biodiversity underpins human well-being and resilient societies.
Main threats to biodiversity
Deforestation
Cause: Clearing forests for agriculture, housing, and industry.
Effect on biodiversity: Habitat loss and fragmentation, species decline.
Effect on humans: Flooding, soil erosion, reduced water availability.
Pollution
Cause: Improper disposal of waste, plastics and chemicals.
Effect on biodiversity: Toxic impacts on wildlife and ecosystems.
Effect on humans: Respiratory diseases, contaminated water and food.
Climate change
Cause: Rising greenhouse gases from burning fossil fuels.
Effect on biodiversity: Range shifts, habitat loss, and extinction risks for species that can't adapt.
Effect on humans: More intense storms, droughts, and threats to food security.
Overexploitation
Cause: Overfishing, illegal logging, and unsustainable hunting.
Effect on biodiversity: Rapid population declines and extinctions.
Effect on humans: Loss of livelihoods and reduced resources.
Invasive species
Cause: Non-native species introduced to new ecosystems.
Effect on biodiversity: Competition, displacement, and species loss.
Effect on humans: Agricultural losses and reduced ecosystem services.
Impacts of biodiversity loss on human society
Health
Biodiversity loss increases the risk of zoonotic diseases and reduces the pool of medicinal resources derived from plants and animals.
Livelihoods
Many communities rely on fishing, farming, and ecotourism. When ecosystems degrade, incomes and food security suffer.
Food security
Less diverse crops and fisheries mean lower nutrition and greater vulnerability to pests and disease.
Safety & protection
Forests, mangroves, and wetlands buffer communities from storms and floods; losing them increases disaster risk.
Technology & practical student projects
As BSIT students, you can contribute practical tools that help conserve biodiversity. Sample project ideas: