Vocabulary
The annual number of live births per 1,000 people in a given population
Birth Rate
the number of deaths within a specific population over a given period, usually expressed as deaths per 1,000 individuals per year
Death Rate
three important characteristics of a population
Geographical distribution
density
growth rate
a non-native organism that establishes, spreads rapidly, and causes harm to the environment, economy, or human, animal, or plant health in its new ecosystem
invasive species
Mrs. Davison have this many kids
4
a spatial pattern where individuals of a population are concentrated in small groups or clusters, rather than being evenly or randomly spaced across an area
Clumped Distribution
a spatial pattern where organisms or features are spread out in a regular, evenly spaced manner, often due to competition for resources like water or light or as a result of territorial behavior
Uniform Distribution
the spatial arrangement and patterns of any phenomenon, such as species, people, resources, or phenomena, across a given area, often showing how these elements are spread out over different regions or countries
Geographical distribution
any plant, animal, or organism that does not occur naturally in a particular ecosystem but has been introduced there by human activities, either intentionally or accidentally
True or False: Your nose and ears never stops growing
True
the movement of individuals into a specific population or area from another location, serving to increase the population size and potentially influence its density and diversity
immigration
the movement of individuals into a specific population or area from another location, serving to increase the population size and potentially influence its density and diversity
Random distribution
is the number of individuals per unit area.
Distribution
Characteristics of invasive species
have few natural predators, competitors, parasites, or diseases
Have high reproductive rates
Are long-lived
Are generalists
Are Pioneer species
True or False: Babies have more bones that an adult
True, they are born with around 300 bones, while adults have 206, as many of these bones fuse together as a person grows
the maximum number of individuals or species that a specific environment can sustain indefinitely without degrading its resources
Carrying Capacity
the sum of all biotic (living) and abiotic (non-living) factors within an ecosystem that limit a population's growth, preventing it from reaching its biotic potential
Environmental Resistance
Factors that affect population size
number of births
number of deaths
the number of individuals that enters or leaves a population
reduce forest health and productivity
Some invasive species kill native species
economic impacts
True or False: You're taller in the morning
True, because the cartilage between your bones compresses during the day, making you about 1 cm shorter by the time you go to bed.
depicts an S-shaped (sigmoidal) curve that shows a population's growth slowing down and eventually stabilizing as it approaches its environment's limited carrying capacity,
Logistic growth
known as a J-shaped curve, illustrates a growth pattern where a population or phenomenon increases at an accelerating rate
Exponential growth
If a population has abundant space and resources, and is protected from predators and disease, then organisms in that population will multiply and the population size will increase
Exponential growth
Name 3 invasive species
Zebra mussel, Multiflora Rose, Garlic Mustard
True or False: There are more trees on Earth than stars in the Milky Way
True, there are an estimated 1 trillion trees compared to 200-400 billion stars