Mass extinctions - when a large number of species or families become extinct; occur when there are large, catastrophic events that cause major changes in the ecosystem or biosphere, background extinction - die offs that occur at lower rates , habitat fragmentation - destroying habitat and leaving small, disconnected pieces of habitat intact, acid rain - caused by air pollution when humans burn fossil fuels; chemicals dissolve in the water vapor in clouds and produce rain that has a low pH, deforestation - destruction of forests; cutting down trees on a large scale, aquifer - water stored in reservoirs underground, invasive species - a species that is non-native to an area; this species begins to harm native species, introduced species - a species that is non-native, greenhouse effect - gasses in the atmosphere act as a blanket, keeping heat inside the atmosphere and warming the globe, biodoversity - the different types of living organisms on earth, ecosystem services - services provided by healthy ecosystems; for example a wetland providing clean water to surrounding areas, flagship species - in conservation, a species used to gain support and funding from the public and organizations; this species "leads" the conservation effort, keystone species - a species that maintains the diversity in a habitat, indicator species - in conservation, a species that indicates if an habitat is healthy or polluted, umbrella species - in conservation, a species that requires a large area of habitat to survive. By conserving this species you protect the entire habitat and so protect many other species in the process,

Conservation and biodiversity vocabulary review

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恢復自動保存: ?