Biology HL
4
Chapters
553
Notes
Theme A - Unity & diversity
Theme B - Form & Function
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Biology HL
Theme D - Continuity & Change
Unlocking Ecological Succession Secrets
391 words
2 mins read
Last edited on 5th Nov 2024
Table of content
What's Ecological Succession? 🌍
- Imagine your favorite TV show, with every episode leading to a dramatic climax. In the world of ecosystems, this drama unfolds as 'Ecological Succession'.
- It’s a series of changes where one ecosystem is replaced by another until we reach the star of the show, the "climax community".
Deep Dive 🔍
- Succession Steps: Ecosystems transform progressively.
- Start: Grassland 🌾
- Middle: Shrubs grow, light reduces, temperature drops, humidity rises. 🌳🌲
- End: More nutrient-rich soil leading to a forest with varied species. 🌳🍂
- Biotic vs. Abiotic Changes
- Biotic: Involves living things. Example: Species composition of plants and animals.
- Abiotic: Involves non-living factors. Example: Soil nutrients, light intensity, humidity.
- Changes Trigger Changes: One change in an ecosystem often sets off another, like a series of dominos.
- Example: If you add trees 🌳 to grassland, they will block sunlight, creating a new environment suitable for different plants and animals.
- Climax Community: The final, stable community that doesn’t change much.
- It’s like reaching the grand finale of our TV show where everyone finds peace!
- Recurring Cycles: Sometimes, ecosystems keep changing in a loop, without any stable climax.
- Think of it as a TV series with season after season, but no end in sight!
What Sparks these Successions? 🌟
- Abiotic Triggers
- Nature’s Fury Example: An avalanche that wipes out a forest, starting a brand new succession on the clean slate.
- Biotic Triggers
- Beaver Drama: When beavers move to a river, they might flood some areas. This turns open water into a swamp, creating a whole new ecosystem.
Unlock the Full Content! 
Dive deeper and gain exclusive access to premium files of Biology HL. Subscribe now and get closer to that 45 🌟
Biology HL
Theme D - Continuity & Change
Unlocking Ecological Succession Secrets
391 words
2 mins read
Last edited on 5th Nov 2024
Table of content
What's Ecological Succession? 🌍
- Imagine your favorite TV show, with every episode leading to a dramatic climax. In the world of ecosystems, this drama unfolds as 'Ecological Succession'.
- It’s a series of changes where one ecosystem is replaced by another until we reach the star of the show, the "climax community".
Deep Dive 🔍
- Succession Steps: Ecosystems transform progressively.
- Start: Grassland 🌾
- Middle: Shrubs grow, light reduces, temperature drops, humidity rises. 🌳🌲
- End: More nutrient-rich soil leading to a forest with varied species. 🌳🍂
- Biotic vs. Abiotic Changes
- Biotic: Involves living things. Example: Species composition of plants and animals.
- Abiotic: Involves non-living factors. Example: Soil nutrients, light intensity, humidity.
- Changes Trigger Changes: One change in an ecosystem often sets off another, like a series of dominos.
- Example: If you add trees 🌳 to grassland, they will block sunlight, creating a new environment suitable for different plants and animals.
- Climax Community: The final, stable community that doesn’t change much.
- It’s like reaching the grand finale of our TV show where everyone finds peace!
- Recurring Cycles: Sometimes, ecosystems keep changing in a loop, without any stable climax.
- Think of it as a TV series with season after season, but no end in sight!
What Sparks these Successions? 🌟
- Abiotic Triggers
- Nature’s Fury Example: An avalanche that wipes out a forest, starting a brand new succession on the clean slate.
- Biotic Triggers
- Beaver Drama: When beavers move to a river, they might flood some areas. This turns open water into a swamp, creating a whole new ecosystem.
Unlock the Full Content!
Dive deeper and gain exclusive access to premium files of Biology HL. Subscribe now and get closer to that 45 🌟