Unit 1
Two species living in a close and long-term association with one another in an ecosystem.
What is Symbiosis
Species that can live under a wide range of biotic or abiotic conditions.
What is Generalist
A species with a low intrinsic growth rate that causes the population to increase slowly until it reaches the carrying capacity of the environment.
What is K-Selected Species
An area where one plate moves toward another plate and collides.
What is Convergent Boundary
A method of harvesting trees that involves removing all or almost all of the trees within an area.
What is Clear-Cutting
This is a biome characterized by hot, dry summers and mild, rainy winters. Also known as woodland.
The basic ecosystem processes, such as nutrient cycles and soil formation, that are needed to maintain other services
What is Supporting Services
A growth model that describes a population whose growth is initially exponential, but slows as the population approaches the carrying capacity of the environment
What is Logistic Growth Model
The breakdown of rocks and minerals by chemical reactions, the dissolving of chemical elements from rocks, or both these processes.
What is Chemical Weathering
An agricultural method that utilizes large plantings of a single species or variety.
What is Monocropping
Describes a lake with a high level of fertility.
What is Eutrophic
species that enter new ecosystems and multiply, harming native species and their habitats
You can also click the terms or definitions to blur or reveal them
Hide definitions
What is Invasive Species
The number of deaths of children under age 5 per 1,000 live births.
What is Child Morality
All the land in an area that drains into a particular stream, river, lake, or wetland.
What is Watershed
The preparation of soil through a variety of activities including plowing but also including stirring, digging, and cultivating.
What is Tilling
Process in which organisms use sunlight to convert carbon dioxide and water into oxygen and glucose
What is Photosynthesis
A large number of species that went extinct over a relatively short period of time.
What is Mass Extinction
A method which dictates that by dividing the number 70 by the percentage population growth rate we can determine a population's doubling time.
What is Rule of 70
The layer of the atmosphere above the troposphere, extending roughly 16 to 50 km (10-31 miles) above the surface of Earth.
What is Stratosphere
A form of irrigation where an entire field is flooded with water.
What is Flood Irrigation
Low in oxygen
What is Hypoxic
In an ecosystem, a measure of how much a disruption can affect the flows of energy and matter.
What is Resistance
A theory that states that a country moves from high to lower birth and death rates as development occurs and that country moves from a preindustrial to an industrialized economic system.
What is Theroy of demographic transition
A reversal of wind and water currents in the South Pacific.
What is El Nino
A shortened term for biological control, it uses biological organisms to control agricultural pests.
What is Biocontrol