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Biodiversity (Threats (Excessive quantities of pesticides/herbicides.…
Biodiversity
Threats
Increase in human population growth.
more demand for food = development of more intensive food production systems.
Habitats lost
Native fauna/flora can't survive and can result in extinction of some species.
Large-scale production = increased land clearing to make way for farming.
Excessive quantities of pesticides/herbicides.
Polluted waterways.
Loss of ecosystems that thrive in river/lake systems.
Introduction of species that aren't native.
Species such as rabbits, foxes, cane toads and the prickly pear
Severe weather conditions.
Loss of genetic diversity
Occurred because farmers have limited the variety of crops/animals they use to those that produce the greatest yield.
75% of crop diversity was lost between 1900-2000.
Serious implications for future food security.
Many countries establishing gene banks to preserve the genetic diversity of their crops.
Heritage animals are an important source of genetic diversity.
Essential as it ensures sustainability of breeding stock into the future.
Importance of primary production
Sustain agricultural food production.
Production of healthy crops/pastures relies on the microbes in the soil that help cycle nutrients and break down organic matter to ensure the soil is fertile and crops can grow.
Ensuring the health of the water in all river systems, lakes, dams and groundwater thats used in production of our food supply.
Like bees, birds play a critical role in our agricultural production acting as pollinators and helping minimise the destructive impact some insect pests can have on food crops.