Ecosystems and Populations notes
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This Ecosystems and Populations notes page gathers community-made notes on topics from biodiversity and food chains to nutrient cycles and population growth. School students can use them to revise, and teachers can find material for lessons; some notes are at university level. There are over 200 notes to explore. Pick a topic and start reading.
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- Levels of Ecological Organization146
- Biotic and Abiotic Factors193
- Habitats, Niches and Adaptations86
- Biomes and Types of Ecosystems402
- Species Interactions and Community Ecology237
- Food Chains and Food Webs433
- Energy Flow and Ecological Pyramids223
- Nutrient Cycles252
- Population Dynamics and Growth162
- Sampling and Distribution of Organisms78
- Ecological Succession110
- Biodiversity and Conservation156
- Human Impact and Sustainable Ecosystems90
Notes
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Biodiversity notes and exam questions Biodiversity is a measure of three things: The variety of species in an ecosystem The variety of habitats in an ecosystem The genetic diversity of an ecosystem Species diversity can be me...
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Ch.2 Habitat Management & Creation Habitat ManagementSpecies depend on abiotic and biotic factorsAbiotic (physical) factors: water, temperature, light levels, pH, mineral/nutrient suppliesBiotic (biological) factors: food, predation, disease, competiti...
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Nutrient Cycles
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BIOLOGY UNIT 3B GCSE There are over SIX BILLION PEOPLE in the worlddue to medicine and farming methods which have REDUCED the number of people dying from disease and hunger. increasing population puts pressure on environment h...
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Exam Q on food chains 10m Explain how energy is transferred through food chains and food webs in an ecosystem. You should refer to the efficiency of this transfer in your answer. You will gain credit if you make use of the information in the d...
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Biology: Population Size & Ecosystems Population Size & EcosystemsPopulation growth is controlled by biological and environmental factors. Succession is the change of structure and species composition of communities over time. Energy passes along a food c...
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Ecology Ecosystem – All living organisms and all the non-living components in a particular area, and their interactions.They are dynamic systems, changing all the time.Habitat – The place where an organism lives.Populati...
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Ecosystem and Material Cycles Ecosystem and Material Cycles- Investigating ecosystem Quadrats Some ecosystems are very complex with large numbers of different species of different population sizes sampling is often used to estima...
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Ecology and Evolution Standard Level Biology: Ecology and Evolution A species is a group of organisms able to interbreed and produce potentially fertile offspring with a common gene pool within the group.The Habitat is a typical environmen...
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exam notes Wildlife and Conservation 8/27 - Taxonomy: Naming and classification of species - Domain: 3 domains (Bacteria, Archaea, Eukarya) - Bacteria: Prokaryotes, can make you sick/digest/decompose/as well ...
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Biology & our environment Variation characteristics of organisims vary within & between species. genetic variationMutationsEnvironmental variation Evolution a gradual process involving gene mutation & natural selection, which can lea...
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Ecology Competition Habitat - where organism lives Population - all organisms of one species living in a habitat Community - populations of different species living in a habitat Abiotic factors - non-living factors of e...
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Class Notes 07.25.18 - Factors Impacting Migration Abiotic Factors: Salinity Intertidal zone organisms can experience large, rapid changes in the salinity of their environment due to changes in the weather and climate Wate...
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CHAPTER 7 NOTES ADAPTATIONS:Organisms need resources and their own characteristics and traits called adaptations to enable them to survive in particular environmentsThere are 3 types of adaptations - structural, physiological, and be...
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Untitled Ecology -The study of relationships between living organisms and between organisms and their environment Species -A group of organisms that can interbreed and produce fertile offspring Insects, Plants, Fungi, Marine I...
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Ecology and Evolution Standard Level Biology: Ecology and Evolution A species is a group of organisms able to interbreed and produce potentially fertile offspring with a common gene pool within the group.The Habitat is a typical environmen...
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Chapters 1 and 2 Chapter 1Why study ecosystems? Ecosystem definitions; has a focus on the interactions between organisms and environment. Also has a focus on the processes that cause biological systems to function and interact with ab...
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Population Growth & Life Tables LU 4 – POPULATION GROWTH & LIFE TABLES Population = a group on individuals of the same species living in the same area. Ecology = the study of how organisms interact with each other and their environment. Population e...
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L.A 1.4 Analyzing interaction among species - created from Mind Map Levels of organization in ecological systems IndividualsIndividuals form the lowest level of the hierarchy. HabitatEcologists define “habitat” as the space in which individuals of a species carry out their daily ...
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Topic 7: Ecology Adaptations, Interdependence and Competition Communities (7.1.1) An individual is part of a species but lives in its habitat within a population. Organisms are adapted to live in the...
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Flux of energy & matter through ecosystem 1. Define trophic levels and identify key players in food web. Trophic : food/feeling so trophic level = feeding level. - Each step in a chain = trophic level. The arrow indicates the transfer of energy whenever one o...
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Biodiversity Biodiversity Biodiversity is the variety of living things - plants, trees, fungi (mushrooms), animals and bacteria. An ecosystem is made up of both living and non-living parts. Within each ecosystem there...
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Untitled Population A population is a group of organisms that belong to the same species and live in a particular place at the same time; they interbreed with each other Populations can be measured in terms of Size Number of i...
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Biology Unit 2: Ecology Vocab:abiotic features: nonliving things in an ecosystembiome: a large geographical region with similar plants, animals, and climatebiosphere: all the living organisms found on earthbiota: all the living organisms fou...
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Ecosystem Ecosystem An ecosystem consist of all the organisms living together in an area and their interaction with one another as well as their environment.Made up of:Abiotic factors (non-living) Light - plants need sunlight t...
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Interdependence and Adaptations Environmental changes can be measured using non-living indicators such as oxygen levels, temperature and rainfall.Living organisms can be used as indicators of pollution. Lichen can be used as air pollution indicators...
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Ecology NOTES Modes of Nutritions POPULATION AND SPECIES Species: group of organisms with similar characteristics, which can potentially interbreed and produce fertile offspring Population: group of organisms of the sa...
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APES 5.3 and 6 TEST Population dynamics: Study of how Density, dispersion and Age structure change in response to changes in environmental conditions. Density:Number of individuals in a certain areaDispersion: how a popula...
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Population - created from Mind Map Birth rate – number of new individuals produced by sexual or asexual reproduction per unit time. Death rate – number of individuals dying per unit time. Immigration – new individuals joining a population. Emigration –...
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Ecosystems Components of Ecosystems:Producers - plants which photosynthesise to produce foodConsumers - animals which eat plants or other animalsDecomposers - decay dead material and help in recycling nutrientsPhysical environme...
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ORGANISMOS ORGANISMOS VIRUS Presente en plancton, necton y bentos. No metabolismo propio, necesitan huésped. Importante papel regulador de poblaciones de otros organismos ...
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Untitled_1 Ecology- Study of how an organism interacts and depends on its environmentLevels of organization Species- an organism that can reproduce their own kind and offspring is fertile Population- Groups of organisms of one t...
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Human Impacts on Ecosystems SAC Revision Demonstrate an understanding of how organisms are linked through feeding relationships, and give examples of food chains and food webs. organisms are linked through feeding relationships, as organisms need energy and ...
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Human Impact - created from Mind Map Extinction - Natural selection due to changing selection pressures ,Non-contiguous populations – populations which are too small with insufficient genetic diversity to ensure a healthy and viable increase in number , ...
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Basic Concepts of Ecology
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Biology B2 Biology Pyramid of BiomassBiomass- the dry mass of an organism.Pyramids of biomass reveal the mass of living material at each stage in a chain. The amount of material and energy decreases from one stage to t...
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Unit 4 - Key Words - created from Mind Map Populations Abiotic Factors Ecology Biotic Factors Biosphere Ecosystem Population Community Habitat Niche Predator Selection pressure Non-living components of the environment The study of the inter-relationships betwe...
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EEB 2244: Adaptations to the Environment Adaptation to the Environment Overview: Adaptation to terrestrial environments Variable environments and phenotypic plasticities Environmental stressors threaten to disruption an organism's homeostasis Water (lac...
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Untitled ECOSYSTEMS- ABIOTIC AND BIOTIC FACTORS- ABIOTIC FACTORS: a non-living component of an ecosystem. (e.g air quality and humidity, the amount of sunlight) WATER: solvent for all materials in cells; p...
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biodiversity - created from Mind Map humans bacteriaprokaryotic domain of microscopic organisms farming
More Ecosystems and Populations resources
About ecosystems and populations notes
GoConqr OriginalEcosystems and Populations notes
These notes offer different ways into the unit. Ecology introduces ecosystems and habitats, while Biodiversity notes and exam questions looks at species, habitat and genetic variety. Other notes cover nutrient cycles, population size and energy in food chains.
Make the notes work for you
Start with Ecology if you want a starting point for key terms. Then read Biology: Population Size & Ecosystems to connect population growth with biological and environmental factors. For a focused topic, Pyramids of Biomass Explained looks at biomass along a food chain.
After reading, write down the ideas you want to remember and explain how they connect. Return to the notes to check your explanation. If you want to recall terms or test your understanding, switch to flashcards or a quiz on the unit page. Choose a note that matches your current topic and give it a read.
Frequently asked questions
Which note is a good place to start?
Start with “Ecology” for an introduction to ecosystems and habitats. If biodiversity is your focus, “Biodiversity notes and exam questions” covers species, habitat and genetic variety. You can then choose another note on the page to look more closely at a topic you are studying.
What topics do the notes cover?
The listed notes cover biodiversity, habitat management, nutrient cycles, food chains and population size. For example, “Nutrient Cycles” introduces the recycling of minerals, while “Pyramids of Biomass Explained” looks at biomass in a food chain. Choose a title that matches the topic you want to revisit.
Are these notes free to use?
Yes. Every note listed here is free to open and study, with no account needed. The resources were made by GoConqr users. A free account also lets you save quiz scores and make your own quizzes, mind maps, flashcards and notes.