IBDP Environmental Systems & Societies Solutions Chapter 4 Notes

Water, Aquatic, Food Production Systems and Societies

STUDY NOTES FOR ENVIRONMENTAL SYSTEMS & SOCIETIES (ESS) CHAPTER 4 – Water, Aquatic, Food Production Systems and Societies

These notes have specially been curated by expert teachers to simplify and enlighten concepts given in IB ESS SL. The notes are comprehensive in nature and are sufficient to study the chapter in depth and one need not look for other resources beyond the notes provided on our website which can be accessed for free. The notes for Water, Aquatic food production systems and Societies IBDP SL are available on our official website and can be downloaded for free. You are one click away from obtaining all that you need to score well in IB ESS SL.

The material made available on Tychr’s website is available for all IBDP subjects and is specially curated after an extensive amount of effort to ensure that the notes are in consonance with the IB curriculum and are an amalgamation from various textbooks prescribed by the IBO. Students often face a challenge understanding concepts, especially concepts that are new and tricky, these IB ESS Notes will help the student cover the chapter of Water, Aquatic food production systems and Societies entirely while explaining every concept in a detailed and easy way.

The chapter on water, aquatic food production systems and societies introduces the hydrological cycle and explains the influence of human activities like agriculture, deforestation and urbanization on the hydrological cycle. We also discuss terms like salinity, temperature, density and specific heat capacity while trying to understand the distribution of ocean currents. The chapter reviews the water scarcity problem in the world along with the methods to enhance the water supplies. Aquatic food consumption which has seen a huge increase in demand over the years has led to the depletion of fish stocks in the oceans and therefore we talk about the management of fisheries and aquaculture.

Next, the chapter examines water pollution caused because of activities like improper management of waste produced in homes, factories, industries which is dumped into the water bodies, oil spills, sewage, etc. Eutrophication occurs when increased amount of nitrogen and phosphorus is carried into the water bodies leading to algal blooms an oxygen starvation. The strategies to combat or prevent eutrophication by regulating and controlling the pollutants that enter the water bodies is also discussed. Towards the end of the chapter, we discuss dead zones and red tides and the impact of waste on marine life.