Post on 17-May-2020
Human Influence
Human colonization
Harvest flora and fauna
Introduction of new species
Reintroduction
Competition with indigenous human / flora / fauna
Impact : Failure of colonization
Coexistence
Extirpation of indigenous human/flora/fauna
Human Colonization
Related to human colonization
Impact :
Decrease or extinction of some species, esp. endemic species
Habitat degradation
Community change
Harvest of Flora and Fauna
Animal Extinction Since 1600
Taxon Island Continents
Birds 97 20
Molluscs 151 40
Mammals 34 24
Reptiles 22 1
Amphibians 0 2
Insects 51 10
Total 355 97
Introduction of New Species
Sentimental reason European Starling
Water hyacinth
Production Eucalyptus
Ostrich
Long-tailed Macaques
Various domesticated species
“Control” of pest Mongoose in Hawaii
Dingo in Australia
Why introduce species ?
Floriculture species
Horticulture
Aquaria
Agriculture
Pets
Sylviculture
Estate crops
Trends
Usually ok if NON-INVASIVE
Global Problem : Invasive Alien Species
Indigenous Species decrease or extinct
Carp vs. trout in US rivers
Cause problems to human
Water hyacinth (eceng gondok)
Keong emas