habitat fragmentation and invasive species snc1d
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Habitat Fragmentation and Invasive Species
SNC1D
Habitat: the natural environment in which an organism lives, included food and shelter
Habitat: the natural environment in which an organism lives, included food and shelter
Many organisms lose their habitat to human development (cities, farms, etc.).
Habitat fragmentation: remaining wild areas are divided into smaller parts
Factors Affecting the Sustainability of Habitats
• Size: large blocks support larger and therefore more stable populations and communities
Factors Affecting the Sustainability of Habitats
• Size: large blocks support larger and therefore more stable populations and communities
One large block is better than an equal area of smaller blocks.
Factors Affecting the Sustainability of Habitats
• Proximity: the closer areas are to each other, the greater the chance populations will be able to interact
Factors Affecting the Sustainability of Habitats
• Proximity: the closer areas are to each other, the greater the chance populations will be able to interact
Wildlife corridors connect areas and further increase the chance of interaction.
Factors Affecting the Sustainability of Habitats
• Integrity: access by roads and trails can increase pollution, hunting, and fishing
Factors Affecting the Sustainability of Habitats
Invasive species: a non-native species whose accidental or intentional introduction has a negative impact on the natural environment
Invasive species: a non-native species whose accidental or intentional introduction has a negative impact on the natural environment
Many invasive species have no natural predators in the new ecosystem.
The lionfish, with its venomous spines, is native to the Indian and Pacific Oceans but was introduced to Florida water.
Impacts of Invasive Species
• Ecological: invasive species compete with or feed on native species
Impacts of Invasive Species
• Ecological: invasive species compete with or feed on native species
Lionfish stomach contents
Impacts of Invasive Species
• Economic and Tourism: damage to forests, agricultural areas, and tourist areas
Impacts of Invasive Species
• Health: disease-causing organisms are introduced
Impacts of Invasive Species
• Health: disease-causing organisms are introduced
Invasive Species Controls
• Chemical: pesticides
Invasive Species Controls
• Chemical: pesticides• Mechanical: physical barriers or removal
Invasive Species Controls
• Chemical: pesticides• Mechanical: physical barriers or removal
Invasive Species Controls
• Chemical: pesticides• Mechanical: physical barriers or removal
Example: the Cootes Paradise fishway
Invasive Species Controls
• Chemical: pesticides• Mechanical: physical barriers or removal
Invasive Species Controls
• Chemical: pesticides• Mechanical: physical barriers or removal
Invasive Species Controls
• Chemical: pesticides• Mechanical: physical barriers or removal• Biological: adding more non-native organisms to
control the invasive species
Invasive Species Controls
• Chemical: pesticides• Mechanical: physical barriers or removal• Biological: adding more non-native organisms to
control the invasive species
Example: insects released to control purple loosestrife