Quarter 1: Lesson 4 Flashcards
bios
life
diversitas
variety
pertains to the variety, as well as the relative abundance of species within a region.
Species Diversity
total number of genetic characteristics in the genetic makeup of a species, it ranges widely from the number of species to differences within species and can be attributed to the span of survival for a species.
Gene Diversity
includes the variation in both terrestrial and aquatic ecosystems. Ecological diversity can also take into account the variation in the complexity of a biological community, including the number of different niches, the number of trophic levels and other ecological processes
Ecological Diversity
number of organisms of the same species living in the same region
Population
Composed of different organisms living in the same region
Community
is a measure of diversity which takes into account the number of species present, as well as the relative abundance of each species. As species richness and evenness increase, so diversity increases
Index of Diversity
is a measure of the number of organisms that make up a population in a defined area.
Population Density
There are certain environmental conditions that may limit the size of populations, these are called ______
limiting factors
refers to the maximum population size that an environment can support. If the population sizes of frogs exceed the carrying capacity of the rice field, frogs may die due to lack of food and all other needs of the frogs.
Carrying capacity
when their population becomes so low and has a possibility to become extinct because only a few remain.
Endangered
are those species that population declines too fast which has the chance to become endangered.
Threatened
refers to the permanent disappearance of the species when the last member dies.
Extinctions
NATURAL CAUSES OF EXTINCTION
EXTREME HEATING AND COOLING OF THE EARTH
CHANGES IN LANDSCAPE
ACID PRECIPITATION
DISEASES / EPIDEMIC
METEOR IMPACT/COSMIC RADIATION
SPREAD OF INVASIVE SPECIES
