Bio exam 3

shortage or absence of a specific factor that restricts the sucess of a species

symbiosis- a close long-lasting physical relationship between 2 different species

sun

organisms functional role it has in its surroundings, includes all the ways it affects the organism, one animal can influence a local ecosystem

charactersitsics organisms display are determined by genes

1-producers
2-herbavores
3-carnivores (eat herbavores)
4-carnivores (eat carnivores)

concept that no 2 species cannot occupy the same ecological niche in the same place at the same time

cause divergence

has a critical role that play in the matienece of specific ecosystems.

shortage or absence of a specific factor that restricts the sucess of a species, can be biotic of abiotic, varys from species to species,

relationships between organisms in which one organisms benefits while the other is not affected ex. moss on a tree

the changes we see in the genes and characteristics displayed in successive generations overtime

Charles darwin, characteristics organisms display are determined by genes. genes are passed from one generation to another

competition between members of the same species ex. barnacles attach to rocks

competition between different species ex. many predators use the same prey

destruction or disturbance of an existing ecosystem, some substance if left. EX. caused by fires or floods

located near equator, rain almost everyday, plants grow rapidly. poor soil nutrients, great diversity of species, canopy forms solid wall of leaves between sun and forest floor,

have been developed to combat overfishing but spreaded diseases have happened

climate

lakes and ponds, Freshwater is different than marine because...
– Amount of salt
– Temperature
– Moving water
– Oxygen supply
– Organisms
– Flowering plants
– Insects

tropical rainforests, temperate deciduous forests, taiga, northern coniferous, or boreal forests

original species is replaced or limited

the series of changes that occur in an area where no ecosystem previously existed. pioneer species. the first species to populate an area; the are often lichens and mosses carried to the area by wind or water.

mostly deciduous forests, grasslands, and boreal forests

tundra

aquatic ecostsyem that consists of shallow partially enclosed areas where freshwater enters the ocean

protozoa and animals that feed on phytoplankton; come up at night to feed on phytoplankton; eaten by larger animals (fish/shrimp)

shallows down sloping shelf of a lake or pond, dominated by rooted vegetation

photosynthesize and are base of food web

located near oceans and are dominated by shrubby lands, cool winters and hot dry summers, located in medeterranean coast, southern cali, southern tip of africa, parts of chile and australia

no rooted vegetation

humans have increased extinction

low population density, found in small areas, specialized niche, low reproductive rates

effective capture methods and increased fishing effors have been required to maintain capture levels, 40 species are in danger of extinction due to overfishing

difficulty setting harvest limits, countries do not own the ocean, agreements necessary, pressure on resources

results in limited food availibility and changing migration patterns

harmful to human health and biodiversity, can spread diseases, completely kill native species, lower biodiversity

nutrient cycling, cultural uses, water regulation, erosion control, waste treatment, food use, climate services, pest control, pollination, soil formation

mutations, migration, sexual reproduction, population size, selective breading

habitat loss, overexplotation, invasive species, predator and pest control, climate change

broad term that describes diversity of genes, species, and ecosystems in a region

changes in genetic info, valuable or harmful

count of the number of different kinds of species in an area

the process of replanting trees within the area

occurs when humans harvest organisms faster than the organisms can reproduce, influences extinction, harvesting occurs for food, fuel, and decorations

occurs when human activities result in the conversion of natural ecosystems to human dominated systems, reduction of species, cause of extinction