Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
35 Cards in this Set
- Front
- Back
|
What are ecological factors?
|
an aspect of habitat that can affect the organisms living there
|
|
|
What are the 2 types of ecological factors (explain)?
|
1) abiotic: physical or chemical factors of the environment --> non living --> ex: pH, amount of light, terrain, depth of snow...
2) biotic: related to the actions of living organisms in a habitat --> ex: birth rate, disease, amount of food, predation, competition, human activity... |
|
|
What is the limiting factor?
|
an ecological factor that causes the population density to decease
|
|
|
What is a biological cycle?
|
the cycles that are composed of the rise and fall of a given population --> these cycle periods are usually fixed in time and repeated
|
|
|
What is biodiversity?
|
the variety of species living in a community (higher biodiversity = higher number of species)
|
|
|
What 2 factors determine if the biodiversity will be high?
|
1) high number of species
2) relative abundance of a different species is similar |
|
|
What is a community?
|
a set of populations of different species sharing the same habitat --> interacting populations
|
|
|
What are the 2 things that must be used to measure the biodiversity of a community?
|
1) the number of species in the community (species richness)
2) the relative abundance of each species (percentage out of the total number of individuals in the community) |
|
|
What are the 4 main types of interactions in a community?
|
1) competition
2) predation 3) mutualism 4) commensalism |
|
|
What is competition?
|
the interaction between living organisms that seek access to the same resource in their habitat --> limited resources --> reduces overpopulation --> 2 types: intra and interspecific
|
|
|
What is the difference between intraspecific and interspecific competition?
|
intra: same species
inter: different species |
|
|
What is predation?
|
the interaction between 2 living organisms in which one hunts the other (carnivorous and herbivorous) --> between predator and prey --> special case = parasitism
|
|
|
What is mutualism?
|
the interaction between 2 living organisms that benefits both organisms
|
|
|
What is commensalism?
|
the interaction between 2 living organisms in which one benefits and the other remains unaffected
|
|
|
What is a population?
|
A group of individuals of the same species, living in a shared space at a specific point in time.
|
|
|
What is a population?
|
A group of individuals of the same species, living in a shared space at a specific point in time.
|
|
|
What is a species?
|
Specific population that all belong to the same group
|
|
|
What is a population?
|
A group of individuals of the same species, living in a shared space at a specific point in time.
|
|
|
What is a species?
|
Specific population that all belong to the same group
|
|
|
What are the 4 factors that affect population size?
|
Births, deaths, immigration and emigration
|
|
|
What are the 3 methods of measuring population size?
|
Counting individuals, counting by sample area, mark and recapture
|
|
|
What are the 3 methods of measuring population size?
|
Counting individuals, counting by sample area, mark and recapture
|
|
|
What is the formula for mark and recapture?
|
Number of marked animals captured/ total number of animals captured second time = number of marked animals/population size
|
|
|
What are the 3 methods of measuring population size?
|
Counting individuals, counting by sample area, mark and recapture
|
|
|
What is the formula for mark and recapture?
|
Number of marked animals captured/ total number of animals captured second time = number of marked animals/population size
|
|
|
What is population density?
|
Te number of individuals per knit of area/ volume --> number of individuals/area or volume occupied
|
|
|
What are the 3 methods of measuring population size?
|
Counting individuals, counting by sample area, mark and recapture
|
|
|
What is the formula for mark and recapture?
|
Number of marked animals captured/ total number of animals captured second time = number of marked animals/population size
|
|
|
What is population density?
|
Te number of individuals per knit of area/ volume --> number of individuals/area or volume occupied
|
|
|
What factors affect population density?
|
HABITAT --> access to food and water, climate, presence of predators, disasters...
|
|
|
What are the 3 methods of measuring population size?
|
Counting individuals, counting by sample area, mark and recapture
|
|
|
What is the formula for mark and recapture?
|
Number or marked animals X total number of animals captured the second time/ number of marked animals captured the second time
|
|
|
What is population density?
|
Te number of individuals per knit of area/ volume --> number of individuals/area or volume occupied
|
|
|
What factors affect population density?
|
HABITAT --> access to food and water, climate, presence of predators, disasters...
|
|
|
What are the 3 ways of population distribution?
|
Clumped, uniform and random
|
