Category: ESS 2.1 Individuals to Ecosystem
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ESS 2.1.7 Tipping Point Vs Keystone Species
Learning objectives Part 1: The Concept of Tipping Point Tipping Points and Ecosystem Stability Measuring Changes in Ecosystems Due to Human Activity Human impacts on ecosystems include: Factors influencing ecosystem change: Example study locations: Methods for studying human impact: Part 2: The Keystone Species and Trophic Cascade Keystone Species Trophic Cascade Part 3: Case Studies…
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ESS 2.1.6 [AHL] Further Classification & Cladistics
Learning objectives Life Cycles and Human Impacts on Species Life cycles vary considerably among species, reflecting differences in reproductive behaviour, lifespan, and ecological adaptations. Species can be broadly categorised based on their reproductive strategies and the degree of parental investment in offspring. Species Life Cycle Differences and Classification Species exhibit distinct life cycle patterns that…
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ESS 2.1.5 [Skills] Sampling the Ecosystem
Learning objectives Part 1 Random Quadrat Process of Using Quadrats for Sampling Population Size Sampling Methods: Population Density Calculation: Abundance scales Part 2 Transect Quadrat sampling along a transect is used to measure changes in species composition, population density, and distribution along an environmental gradient (e.g., soil moisture, altitude, light intensity). Steps for Quadrat Sampling…
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ESS 2.1.3 Population Interactions
Learning objectives Terminologies Community A community is a group of several populations living and interacting with each other in an ecosystem. A community is many species living together, whereas the term population refers to just one species A population of sheep, eating grass. Note that there are a few species of grass in the field.…
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ESS 2.1.4 Population Growth
Learning Objectives Part 1: Population and Niche Definition: “A population is a group of organisms of the same species living in the same area at the same time, and which are capable of interbreeding” The Concept of Niche First of all, the niche is not just the habitat! A niche describes the particular set of…
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ESS 2.1.2 Biotic and Abiotic Factors
Learning objectives Introduction Take a look at the photograph on the left, everything that you see and might not see can be the factors for an ecosystem to be self-sustaining Let’s list down what present in this ecosystem! We can clearly see a ladybug, aphids and some vegetation. These are living things are are interacting…
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ESS 2.1.1 Species Concept
Learning Objectives The Biosphere Concept of Species Definition: “a species is a group of organisms that can interbreed and produce fertile offspring” Limitation to the species concept: DNA profiling in dichotomous keys
PYTR Class 