Unit 2 - The Living World Flashcards
If a population undergoes a bottleneck, what will happen?
Genetic diversity will be lost
The more genetically diverse a population is the better it is and more able to withstand what?
Stressors
Ecosystems with large amounts of biodiversity are more like to recover from _______.
Disruptions
Loss of habitat causes _______ species to be loss then generalists are lost.
Specialist
The number of different species in an ecosystem
Species Richness
The number of individuals within each species
Species Evenness
What are the four categories of ecosystem services?
Provisioning, regulating, cultural, and supporting
Activities that disrupt the services that ecosystems provide to humans, which cause economic and ecological impacts
Anthropogenic
Drinking water, timber, wool, natural gases, oils, and medicinal benefits
Provisioning Services
Pollination, air filtration, climate regulation, water purification
Regulating Services
Recreation, tourism, aesthetic enjoyment
Cultural Services
Water cycle, photosynthesis, cycling of nutrients, soil creation
Supporting Services
The study of the ecological relationships and distribution of organisms on islands and how the communities are structured
Island Biogeography
Island species are ______ because of the limited resources, such as food and territory.
Specialists
If _______ species are introduced to an island they out compete the specialists
Invasive
The range of conditions that an organism can endure before it doesn’t survive
Ecological Tolerance
__________ can have consequences that are as great, if not greater than many anthropogenic disruptions.
Natural disruptions
Operate on a range of scales, periodic, episodic, or random
Earth system processes
Wildfires, droughts, floods, tornadoes
Periodic
Hurricanes, El Nino, La Nina
Episodic
Earthquakes, disease epidemics, volcanic eruptions
Random
Why does the sea level vary?
Changes in glacial ice on Earth over time
Results in habitat changes
Major environmental changes
A reason
