populations and communities Flashcards
define carrying capacity
the maximum number of individuals of a species that an environment can sustainably support without deterioration in the quality of the resources
negative feedback in terms of population growth
mechanisms or processes that act to regulate//decrease population size when it exceeds the carrying capacity of the environment
density dependant limiting factors
factors that depend on the populations size eg competition, predition, food, disease itd itp
like they brought that shit upon themselves
density independent limiting factors
factors thet they didnt bring on themselves and the population size doesnt have shit to do with them wild fire, volcanic eruptions, hurricane, deforestation
what do individuals compete for
a higher density will result in lesser amounts of resources hence competition
what determines the intensity of predation
the higher the density of a population the more intense the predation
disease and parasitism
the higher the density the more likely the spreaf transmission of disease
community
a group of species that lives on a particular area//in a particular habitat
competition for plants
light
space
water and nutrients
pollen to be distributed by pollinators (attention from pollinators)
competition for animals
space
nestling sites
water as a resource
food
benefits from coordinations in birds
warmth and protection to everyone
benefits from coordinations for wolves
social predation increases chances of success (circling on prey)
benefits from coordinations for (weird) fishes
fish that form a tight shoal are harder for predators to catch (HOW) taki hive mind sie robi
benefits from coordinations for meerkats
shared parental care
like babysitting
and other ppl can do other shit like gather food for example
herbivory
primary consumers feeding on producers
bison grazing on grasses
