Jessica Hoxha Ch 3 Glossary Terms
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Jessica Hoxha Ch 3 Glossary Terms
chapter 3 glossary terms
What is biodiversity?
The number and variety of life forms, including species, found within a specific region as well as all the number and variety of ecosystems within and beyond that region
The number and variety of life forms found within a specific region
: Rainforest is very bio-diverse
To guard legally from harm a species that is listed as endangered, threatened, or of special concern
Keep safe from harm or injury.
: We protected and helped the black-footed ferret and now it is no longer endangered
What is a biodiversity hotspot?
A place where there is an exceptionally large number of species in a relatively small area
A place where there is a very large number of species in a small area
: A hotspot in Canada is the Leitrim Wetlands
What is a community?
All the populations of the different species that interact in a specific area or ecosystem
: Coral reef
What is a dominant species?
Species that are so abundant that they have the biggest biomass of any community member
Species that are so large, they have the biggest biomass out of any community member
What is a keystone species?
A species that can greatly affect population numbers and the health of an ecosystem
: Sea otter
What is captive breeding?
The breeding of rare or endangered wildlife in controlled settings to increase the population size
Taking a rare or endangered species into a controlled setting and breeding it to the increase the population
: Black-footed ferrets were apart of captive breeding
What is an ecosystem engineer?
A species that causes such dramatic changes to landscapes that it creates a new ecosystem
What is succession?
The series of changes in an ecosystem that occurs over time, following a disturbance
: For a beaver pond, the area changes from forest to flooded forest
What is habitat loss?
The destruction of habitats which usually results from human activities
: Filling in wetlands
What is deforestation?
The practice of clearing forests for logging or other human uses, and never replanting them
Clearing forests for logging or human uses without ever replanting them
: Clearing a forest to build a building
What are alien species?
A species that is accidentally or deliberately introduced into a new location
: An immigrant who is accidentally or purposefully introduced into a new country
What is an invasive species?
A species that can take over the habitat of native species
: Snake head fish
What is overexploitation?
The use or extraction of a resource until it is depleted
The use or removal of a resource until it is reduced
: Overexploitation of sharks
What is extinction?
The death of all the individuals of a species
A species that is completely gone
: Dodo birds are extinct
What is a biodiversity crisis?
The current accelerated rate of extinction
The current increased rate of extinction
Example: The jaguar population has been greatly reduced because of over-hunting
What is restoration ecology?
The renewal of degraded or destroyed ecosystems through active human intervention
The renewal of broken down or destroyed ecosystems with active human help
: Program that replants trees in areas that were deforested
What is reforestation?
The regrowth of a forest, either through the planting of seeds or trees in an area where a forest was cut down
Regrowth of a forest by planting seeds or trees where a forest was cut down
What is biocontrol?
The use of a species to control the population growth or spread of an undesirable species
Using a species to control the growth or spread of an unwanted species
: Monitor lizards were brought in to control the rats
What is bioremeditation?
The use of living organisms to clean up contaminated areas naturally
: Bacteria has been used to break down oil from oil spills
What is bioaugmentation?
The use of organisms to add essential nutrients to depleted soils
The use of organisms to add essential nutrients to reduced soils
: Back in the day, farmers grew corn in one area for a year and then replaced it with clovers to help replenish nitrogen levels in the soil