Test II Flashcards
Biotic Factor
The community of living organisms that that live in an ecosystem
Abiotic Factor
The physical environment with which the community interacts
Biosphere
The portion of the Earth on/in which living organisms can live
Ecosystem
A specific geographic location and all of the organisms that live in that location and interact with each other
Four Factors that Affect Population Size
Birth, Death, Immigration, and Emigration
Exponential Growth Model
The larger the population becomes, the faster it will grow because in each generation there will be more individuals reproducing
Carrying Capacity
the maximum number of individuals of that species that the local environment can support at a particular time
Logistic Growth Model
The per capita growth rate decreases as the population density increases
Colonizer
Species that recover quickly from disturbances and dominate after a disturbance
Species Diversity
The measure of how many species occur in an area, and how rare or common a species is
Simpson’s Index of Diversity
Uses the population size of each species in the study to generate a single number indicating diversity
Ethology
Branch of biology that involves that involves the study of animal behavior, including human behavior
Field Study
An ethologist observes animals in their natural habitats with minimal interfence or interaction with the study subjects
Laboratory Studies
Animals are put through specifically designed experiments
Taxis
If the movement is directional with respect to the source of the stimulus
Phototaxis
Movement as a response to light
Geotaxis
Directional movement as a response to gravity
Chemotaxis
directional movement as a response to chemicals
Kinesis
movement that is random in direction
Tropism
Movement as a response to a stimulus but the organism just repositions
Social Behavior
Behavior involving the same species
Taxonomy
the science of naming, describing, and classifying organisms
Carolus Linnaeus
created system of classification based on the work of Swedish scientists
Systema Naturae
Publication by Linnaeus creating the binomial system
Binomial Nomenclature
Organisms are given a two part name
Taxa
hierarchical order of named groupings
Order of Linnaean System
Domain-> Kingdom-> Phylum-> Class-> Order-> Family-> Genus-> Species
International Code of Zoological Nomenclature
governs the taxonomy of animals
International Code of Nomenclature for algae, fungi, and plants
governs the naming of protists, fungi, and plants
Phylogenetic Systematics
Determines the evolutionary relationships between different groups of organisms
Phylogeny
a hypothesis that can be tested and revised as new taxa are discovered or as new data are gathered about the members of that taxonomic group
Parsimony
the simplest explanation is the most reasonable explanation
Short Growing Season’s Effect on Moose Population
Moose population decreases
Long Growing Seasons Effect on Moose Population
Extinction
What is the most important factor of fire for diversity
The spread of the fire
M
Number of animals that were marked and released back into the population
N
Population size (trying to estimate)
R
Number of animals in the second sample that are recaptures