ESS Unit 1

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45 Terms

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DDT

synthetic pesticide used to control insects. DDT was used to battle malaria Its effects include thinning of eggshells, bioaccumulation in food chains, and potential harm to wildlife and humans.

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ecocentrist

places nature and the environment at the center of their values and decision-making, prioritizing ecological well-being over human interests.

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technocentrist

believes in the central role of technology in society, often prioritizing technological solutions over other factors. Environmental issues can be solved by development (e.g. trump)

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A silent spring

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Niche

how an organism makes a living

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ecoystem

where plants, animals and other organisms as well as weather work together to form a bubble of life

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ecology

study of organisms and their interactions

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habitat

environment in which a species normally lives

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species

a group of organisms that share common characteristics, that can interbreed and create fertile offspring

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biotic

living factors that affect an ecosystem(plants, animals, bacteria)

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abiotic

non-living factors that affect an ecosystem(weather, humidity, soil, proximity to water)

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carrying capacity

the maximum population that an environment can sustainably support

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population density

average amount of organisms within an area (e.g. m²)

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population

a group of organisms of the same species living in the same area at the same time

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Realised Niche

actual conditions and resources in which a species exists due to biotic reactions

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fundamental niche

full range of conditions which a sepcies could live in(basic needs)

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spatial niche partitioning

differebt species occupy different spaces in a habitat

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dietary niche partitioning

different species eat different things

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Niche partitioning by resource height

Species occupy same habitat but have access to resources at different heights

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Temporal niche partitioning

species share a habitat but feed at differebt times(times of day, seasons, environmental conditions)

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Positive Feedback

a cycle that amplifies change within an environment.

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Negative feedback

steady-state equilibrium. Cycle that stabilizes itself and always returns to its original state

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Limiting factors

factors that slow population growth.

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Biotic limiting factors

Density dependent. food, competition, parasitation

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Abiotic limiting factors

Density independent. Rainfall, sunlight, temperature

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Autotrophs

use energy from the sun to photosynthethise and grow

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Mutualism

two species benefit from eachother

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Parasitism

one benefits at the expense of the other

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Predator and prey

one feeds off of the other

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Pathogen

causes a disease

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decomposers

break down dead organisms

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detritivores

feed by consuming dead matter or faeces

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<p>system</p>

system

shows inputs, outputs and stores of an ecosystem

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open system

can exchange both energy and matter with its surroundings

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closed system

no matter is lost, energy can be transferred

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isolated system

doesn’t excange matter or energy

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daisy planet

an environmental model that shows how negative feedback loops affect the temperature of earth

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first law of thermodynamics

energy in an isolated system cannot be created or destroyed

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second law of thermodynamics

entropy of a system is always increasing

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entropy

the dispersal of energy through work: evaporation, waste, respiration

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resillience

the ability of a system to return to its initial state after a disturbance

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bioaccumulation

build-up of chemicals in an individual organism over time

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biomagnification

build-up of pollutants over several trophic levels, the top predator consumes the highrst concentration as they have to eat several small polluted creatures

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primary pollutants

are emmited directly from one source

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secondary polllutants

form in the atmospherethrough cheical reactions