Bio Flashcards
_________ is the gradual and sequential change in species
composition of a community over time.
Ecological succession
Name the 2 types of succession
primary succession and secondary succession.
_____________ occurs in a lifeless area, with no soil, where no
community existed before.
Primary succession
_______________ occurs after the disturbance of an existing
Secondary succession
During ecological succession, ______ -selected species are the first to arrive, are large in numbers
and poor competitors.
R
Give an example of a pioneer species. _______
bacteria, lichen, mosses, and fungi.
___-selected species arrive later and replace pioneer species.
K
Last successional community or biome, is known as the ______________________ community.
Climax
Name 3 differences between r-selected species and K-selected species.
_______________________
IDK
_________ is an event by a biotic or abiotic factor that changes the population
size or community composition.
IDK
How easily is the ecosystem disturbed is known as _____
Ecological fragility
How quickly the ecosystem is able to return to its original state after a disturbance is known as
__________
Ecological resilience
Give an example of a localized disturbance. ________
IDK
Give an example of a severe disturbance. _____
IDK
Give an example of a regular re-occurring disturbance. ______
IDK
__________ change is a high intensity disturbance that affects ecosystems gradually.
IDK
An ecological community that has reached equilibrium is known as a ____________ community.
IDK
List the 4 factors that are most important in affecting ecosystem stability.
____________
IDK
________ is when a species moves in or out of an environment.
Migration?
When an entire species dies off this is called ____
Extinction
When one species evolves into 2 species, this is called _____
Speciation
A species, such as an otter, that has a large effect on its ecosystem regardless of its population
size is known as a ________________________ species.
Keystone
According to the pika lab, which 2 factors influence pika density the most?
____________
IDK
In a high magnitude disturbance, the conditions cannot be reversed and the ____-selected species
are eliminated.
Idk
Are all ecological disturbances bad? Why or why not? _______
IDK
Ecosystem __________________ are processes by which the environment produces resources.
Services
Products obtained from ecosystems such as food and raw materials are known as
__________________ services.
Provisioning Services
control of climate and disease, such as purifying water and air are known as
___________________ services
Regulating services
