What Are Ecosystem Services? — Why This Matters for People
Part of Sustaining Ecosystems — GCSE Geography
This deep dive covers What Are Ecosystem Services? — Why This Matters for People within Sustaining Ecosystems for GCSE Geography. Revise Sustaining Ecosystems in The Living World for GCSE Geography with 0 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 3 of 14 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 3 of 14
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0 questions
Recall
18 flashcards
⚙️ What Are Ecosystem Services? — Why This Matters for People
Here is an analogy that might change how you think about this. Your local council maintains the road outside your house. The water company treats the water before it comes out of your tap. The Environment Agency manages flood defences. All of this costs money. But ecosystems do equivalent jobs — for free. When a wetland filters pollutants from river water, that is a service worth billions of pounds. When a tropical rainforest absorbs CO₂ from the atmosphere, it is doing the job that carbon capture technology does, except without the cost. When mangrove forests line a coastline, they absorb the energy of storm waves, protecting coastal communities from flooding.
Ecologists call these ecosystem services, and they divide them into four categories:
Food (crops, livestock, fish, bushmeat); fresh water (rivers, aquifers recharged by forest water cycles); medicine (25% of Western pharmaceutical drugs derive from tropical plants — including aspirin, originally from willow bark, and the anti-malarial drug quinine from the cinchona tree); and raw materials (timber, fibres, fuel).
Climate regulation (tropical forests absorb 2.6 billion tonnes of CO₂ per year, acting as a global carbon sink); flood control (floodplains and wetlands absorb excess water from rivers, reducing flooding downstream — the Somerset Levels flooding in 2014 was partly linked to loss of natural floodplain function); water purification (wetlands filter pollutants from water before it reaches rivers and aquifers); and pollination (bees, butterflies and other insects pollinate roughly 75% of all crops — worth £690 million a year to the UK alone).
Tourism and recreation (the Great Barrier Reef generates AUD $6.4 billion per year in tourism revenue); spiritual and religious value (many indigenous cultures have deep spiritual connections to their landscapes); education and scientific discovery (rainforests and coral reefs are among the most studied environments on Earth, producing knowledge with applications across medicine, materials science and ecology); and mental health (research consistently shows that access to green space and natural environments reduces stress, anxiety and depression).
Soil formation (earthworms, fungi and bacteria break down organic matter to create fertile topsoil — a process that takes approximately 1,000 years to form 1cm of soil naturally); nutrient cycling (nitrogen, phosphorus and other elements are cycled through living organisms and returned to the soil and water); and primary production (photosynthesis by plants converts solar energy into the organic matter that every food chain depends on).
The total economic value of all ecosystem services globally has been estimated at approximately $125–145 trillion per year — roughly 1.5 times the entire world GDP. This is not a precise calculation, but it makes the point: when ecosystems are damaged, the cost is not just environmental. It is economic.
Quick Check: Give one example each of a provisioning service and a regulating service provided by ecosystems.
Provisioning service: food production (e.g. fish from marine ecosystems; crops from productive soils) OR fresh water (rivers and aquifers recharged by forest water cycles) OR medicine (25% of Western pharmaceuticals derive from tropical plants). Regulating service: climate regulation (tropical forests absorb ~2.6 billion tonnes of CO₂ per year) OR flood control (wetlands and floodplains absorb excess water, reducing flooding) OR water purification (wetlands filter pollutants before water reaches rivers) OR pollination (insects pollinate ~75% of crops, worth £690m/year in UK alone).