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Disruptions in Ecosystems: Definition & Examples | StudySmarter

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Disruptions in Ecosystems: ✓ Examples ✓ Natural ✓ Summary ✓ Human Activities ✓ Types ✓ Sources ✓ StudySmarter Original

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Water covers 70% of our planet, and it is easy to think that it will always be plentiful. However, freshwater-the stuff we drink, bathe in, irrigate our farm fields with-is incredibly rare. Only 3% of the world's water is fresh water, and two-thirds of that is tucked away in frozen glaciers or otherwise unavailable for our use.

As a result, some 1.1 billion people worldwide lack access to water, and a total of 2.7 billion find water scarce for at least one month of the year. Inadequate sanitation is also a problem for 2.4 billion people-they are exposed to diseases, such as cholera and typhoid fever, and other water-borne illnesses. Two million people, mostly children, die each year from diarrheal diseases alone.

Many of the water systems that keep ecosystems thriving and feed a growing human population have become stressed. Rivers, lakes and aquifers are drying up or becoming too polluted to use. More than half the world's wetlands have disappeared. Agriculture consumes more water than any other source and wastes much of that through inefficiencies. Climate change is altering patterns of weather and water around the world, causing shortages and droughts in some areas and floods in others.

At the current consumption rate, this situation will only get worse. By 2025, two-thirds of the world's population may face water shortages. And ecosystems around the world will suffer even more.

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Water covers 70% of our planet, and it is easy to think that it will always be plentiful. However, freshwater-the stuff we drink, bathe in, irrigate our farm fields with-is incredibly rare. Only 3% of the world's water is fresh water, and two-thirds of that is tucked away in frozen glaciers or otherwise unavailable for our use.

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10 Diseases That Are Caused Due To Air Pollution | Metropolis TruHealth Blog

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List Of 10 air pollution diseases - cardiovascular diseases, cancer, neurological disorders, gastrointestinal disorders, kidney diseases, liver diseases, skin diseases, asthma, bronchitis, chronic obstructive pulmonary disease.

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As global temperatures rise and the human population expands, more of the planet is vulnerable to desertification, the permanent degradation of land that was once arable.

While interpretations of the term desertification vary, the concern centers on human-caused land degradation in areas with low or variable rainfall known as drylands: arid, semi-arid, and sub-humid lands. These drylands account for more than 40 percent of the world's terrestrial surface area.

While land degradation has occurred throughout history, the pace has accelerated, reaching 30 to 35 times the historical rate, according to the United Nations. This degradation tends to be driven by a number of factors, including urbanization, mining, farming, and ranching. In the course of these activities, trees and other vegetation are cleared away, animal hooves pound the dirt, and crops deplete nutrients in the soil. Climate change also plays a significant role, increasing the risk of drought.

All of this contributes to soil erosion and an inability for the land to retain water or regrow plants. About 2 billion people live on the drylands that are vulnerable to desertification, which could displace an estimated 50 million people by 2030.

Where is desertification happening, and why?

The risk of desertification is widespread and spans more than 100 countries, hitting some of the poorest and most vulnerable populations the hardest, since subsistence farming is common across many of the affected regions.

More than 75 percent of Earth's land area is already degraded, according to the European Commission's World Atlas of Desertification, and more than 90 percent could become degraded by 2050. The commission's Joint Research Centre found that a total area half of the size of the European Union (1.61 million square miles, or 4.18 million square kilometers) is degraded annually, with Africa and Asia being the most affected.

The drivers of land degradation vary with different locations, and causes often overlap with each other. In the regions of Uzbekistan and Kazakhstan surrounding the Aral Sea, excessive use of water for agricultural irrigation has been a primary culprit in causing the sea to shrink, leaving behind a saline desert. And in Africa's Sahel region, bordered by the Sahara Desert to the north and savannas to the south, population growth has caused an increase in wood harvesting, illegal farming, and land-clearing for housing, among other changes.

The prospect of climate change and warmer average temperatures could amplify these effects. The Mediterranean region would experience a drastic transformation with warming of 2 degrees Celsius, according to one study, with all of southern Spain becoming desert. Another recent study found that the same level of warming would result in "aridification," or drying out, of up to 30 percent of Earth's land surface.

When land becomes desert, its ability to support surrounding populations of people and animals declines sharply. Food often doesn't grow, water can't be collected, and habitats shift. This often produces several human health problems that range from malnutrition, respiratory disease caused by dusty air, and other diseases stemming from a lack of clean water.

Desertification solutions

In 1994, the United Nations established the Convention to Combat Desertification (UNCCD), through which 122 countries have committed to Land Degradation Neutrality targets, similar to the way countries in the climate Paris Agreement have agreed to targets for reducing carbon pollution. These efforts involve working with farmers to safeguard arable land, repairing degraded land, and managing water supplies more effectively.

The UNCCD has also promoted the Great Green Wall Initiative, an effort to restore 386,000 square miles (100 million hectares) across 20 countries in Africa by 2030. A similar effort is underway in northern China, with the government planting trees along the border of the Gobi desert to prevent it from expanding as farming, livestock grazing, and urbanization, along with climate change, removed buffering vegetation.

However, the results for these types of restoration efforts so far have been mixed. One type of mesquite tree planted in East Africa to buffer against desertification has proved to be invasive and problematic. The Great Green Wall initiative in Africa has evolved away from the idea of simply planting trees and toward the idea of " re-greening," or supporting small farmers in managing land to maximize water harvesting (via stone barriers that decrease water runoff, for example) and nurture natural regrowth of trees and vegetation.

"The absolute number of farmers in these [at-risk rural] regions is so large that even simple and inexpensive interventions can have regional impacts," write the authors of the World Atlas of Desertification, noting that more than 80 percent of the world's farms are managed by individual households, primarily in Africa and Asia. "Smallholders are now seen as part of the solution of land degradation rather than a main problem, which was a prevailing view of the past."

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Humans are driving the transformation of drylands into desert on an unprecedented scale around the world, with serious consequences. But there are solutions.

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Looking at the environmental issues we have discussed, which one do you feel is the most important to tackle first?

Explain why you have chosen this environmental issue.

What are you going to do to help?

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LO: To identify my responsibilities towards the environment

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LO: To identify my responsibilities towards the environment

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a Scroll Storytelling

Beagle sailed from Plymouth Sound on 27 December 1831 under the command of Captain Robert FitzRoy. While the expedition was originally planned to last two years, it lasted almost five-Beagle did not return until 2 October 1836. Darwin spent most of this time exploring on land (three years and three months on land; 18 months at sea).

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Charles Darwin and the Voyage of the Beagle - Interactive Map

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This map shows the entire trajectory of Charles Darwin, onboard the HMS Beagle, between the years 1831 and 1836.

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The is at the centre of the lines of latitude and is at 0° latitude.

Anything lying south of the Equator is in the Southern Hemisphere and is labelled °S. Anything lying north of the Equator is in the Northern Hemisphere and is labelled °N. The North Pole is 90°N and the South Pole is 90°S.

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Discover what longitude and latitude are and understand what the different hemispheres are. Learn how to locate different places in the world.

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LO; To plot the voyage of the HMS Beagle on a map

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LO; To plot the voyage of the HMS Beagle on a map

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LO: To research the life of Charles Darwin

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LO: To research the life of Charles Darwin

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When Charles Darwin visited the Galapagos Islands, he noticed something strange about the finches (a type of bird). Using your IPad to help you, what did he find out and how did this shape his research? 

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LO: To explain what responsibilities are

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LO: To explain what responsibilities are

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LO: To identify the needs of others and to provide practical examples of how I can help

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LO: To identify the needs of others and to provide practical examples of how I can help

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On your post it note, write down the definition of responsibility. Challenge yourself by writing down examples of how you are responsible.

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1. Watch the video above.
2. Using your knowledge of what responsibility means, are the characters in the film responsible? Explain your answer.
3. What can each character do to become more responsible? What would they do differently?

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Responsibility means being dependable, making good choices and taking accountability for your actions.

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humanities 30.9.24 Plot voyage of HMS Beagle on a map

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1. Collecting books in
2. Ensuring table stays tidy
3. Each child is walking sensibly through school.
4. All children are being kind to each other.

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We've all heard of it, but what is climate change and what is it doing to our planet?

So, what is climate change?

Climate change (or global warming), is the process of our planet heating up.

Scientists estimate that since the Industrial Revolution, human activity has caused the Earth to warm by approximately 1°C. While that might not sound like much, it means big things for people and wildlife around the globe.

Unfortunately, rising temperatures don't just mean that we'll get nicer weather - if only! The changing climate will actually make our weather more extreme and unpredictable.

As temperatures rise, some areas will get wetter and lots of animals (and humans!) could find they're not able to adapt to their changing climate.

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What causes climate change?

1. Burning fossil fuels

Over the past 150 years, industrialised countries have been burning large amounts of fossil fuels such as oil and gas. The gases released into the atmosphere during this process act like an invisible 'blanket', trapping heat from the sun and warming the Earth. This is known as the " Greenhouse Effect ".

2. Farming

Believe it or not, cows' eating habits contribute towards climate change. Just like us, when cows eat, methane - a type of greenhouse gas - builds up in their digestive system and is released in the form of... a burp! This might sound funny, but when you imagine that there are almost 1.5 billion cows releasing all that gas into the atmosphere, it sure adds up!

3. Deforestation

Forests absorb huge amounts of carbon dioxide - another greenhouse gas - from the air, and release oxygen back into it. The Amazon rainforest is so large and efficient at doing this that it acts like our planet's air conditioner - limiting climate change. Sadly, many rainforests are being cut down to make wood, palm oil and to clear the way for farmland, roads, oil mines, and dams.

How will climate change affect the planet?

The Earth has had many tropical climates and ice ages over the billions of years that it's been in existence, so why is now so different? Well, this is because for the last 150 years human activity has meant we're releasing a huge amount of harmful gases into the Earth's atmosphere, and records show that the global temperatures are rising more rapidly since this time.

A warmer climate could affect our planet in a number of ways:
- Shrinking sea ice
How will climate change affect wildlife?

Climate change is already affecting wildlife all over the world, but certain species are suffering more than others. Polar animals - whose icy natural habitat is melting in the warmer temperatures - are particularly at risk. In fact, experts believe that the Arctic sea ice is melting at a shocking rate - 9% per decade! Polar bears need sea ice to be able to hunt, raise their young and as places to rest after long periods of swimming. Certain seal species, like ringed seals make caves in the snow and ice to raise their pups, feed and mate.

It's not just polar animals who are in trouble. Apes like orangutans, which live in the rainforests of Indonesia, are under threat as their habitat is cut down, and more droughts cause more bushfires.

Sea turtles rely on nesting beaches to lay their eggs, many of which are threatened by rising sea levels. Did you know that the temperature of nests determines whether the eggs are male or female? Unfortunately, with temperatures on the rise, this could mean that many more females are born than males, threatening future turtle populations.

How will people be affected by climate change?

Climate change won't just affect animals, it's already having an impact on people, too. Most affected are some of the people who grow the food we eat every day. Farming communities, especially in developing countries, are facing higher temperatures, increased rain, floods and droughts.

We Brits love a good cuppa, (around 165 million cups of the stuff every day!), but we probably take for granted just how much work goes into growing our tea. Environmental conditions can affect the flavour and quality plus it needs a very specific rainfall to grow. In Kenya, climate change is making rainfall patterns less and less predictable. Often there will be droughts followed by huge amounts rain, which makes it very difficult to grow tea.

Farmers might then resort to using cheap chemicals to improve their crop to earn more money, even when long-term use of these chemicals can destroy their soil.

How are people coping with climate change?

Buying Fairtrade products can help make sure a farmer is paid a fair wage. This means they can cover their costs, earn enough money to have a decent standard of living, and invest in their farms to keep their crop healthy, without needing to resort to cheap methods of farming which can further damage the environment.

This support also helps farmers to replace eucalyptus trees - which take up a lot of water - with indigenous trees that are better for the farmers' soil. They can learn to make fuel-efficient stoves which will not only make them a little extra money, but also reduce the carbon footprint of the community - cool!

How can I help prevent climate change?

Small changes in your own home can make a difference, too. Try switching to energy-saving lightbulbs, walking instead of using the car, turning off electrical items when you're not using them, recycling and reducing your food waste.

All these little things can make a difference. You can check out more eco-friendly ideas, in our kids' guide to saving the planet! Plus, check out our cool article about Greta Thunberg, too, to discover how young people are making their voices heard.

You can download information about Fairtrade and climate change for your school, here! www.fairtrade.org.uk/schools.

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What is climate change: facts for kids | National Geographic Kids

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What is climate change (a.k.a. global warming) & why is it happening? We explain how it affects our planet & how we can prevent it...

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Below are the scenarios you are going to discuss and find a solution.
Think about how you are going to take responsibility for each of them.
1. A member of your family has slipped on water that you spilled and didn't clean up. What do you do?
2. What can you do to take personal responsibility for your house chores?
3. What should you do if you broke your friends new phone?
4. What would life be like if no one was held accountable for their actions? Would you want to live in that society?
5. If you commit to doing something you no longer feel like doing, what should you do?
6. You forgot to shut the gate and the dog has escaped. What should you do?
7. What would happen if you left your bike in the driveway and someone ran over it? Who would be to blame?
8. Who would be affected (and how) if you lied about something? How would that make you feel?
9. What consequences would you face if you were to become careless about your school work?