Pratique du Shadowing: Why is biodiversity so important? - Kim Preshoff - Apprendre l'anglais à l'oral avec YouTube

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Our planet's diverse, thriving ecosystems may seem like permanent fixtures, but they're actually vulnerable to collapse.
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Our planet's diverse, thriving ecosystems may seem like permanent fixtures, but they're actually vulnerable to collapse.
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Jungles can become deserts, and reefs can become lifeless rocks, even without cataclysmic events like volcanoes and asteroids.
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What makes one ecosystem strong and another weak in the face of change?
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The answer, to a large extent, is biodiversity.
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Biodiversity is built out of three intertwined features, ecosystem diversity, species diversity, and genetic diversity.
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The more intertwining there is between these features, the denser and more resilient the weave becomes.
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Take the Amazon rainforest, one of the most biodiverse regions on Earth, due to its complex ecosystems,
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huge mix of species, and the genetic variety within those species.
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Here are tangled liana vines, which crawl up from the forest floor to the canopy,
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intertwining with tree tops and growing thick wooded stems that support these towering trees.
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Helped along by the vines, trees provide the seeds, fruits, and leaves to herbivores such as the tapir and the agouti,
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which disperse their seeds throughout the forest so they can grow.
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Leftovers are consumed by the millions of insects that decompose and recycle nutrients to create rich soil.
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The rainforest is a huge system filled with many smaller systems like this, each packed with interconnected species.
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Every link provides stability to the next, strengthening biodiversity's weave.
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That weave is further reinforced by the genetic diversity within individual species, which allows them to cope with changes.
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that lack genetic diversity due to isolation or low population numbers are much more vulnerable to fluctuations caused by climate change,
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disease, or habitat fragmentation.
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Whenever a species disappears because of its weakened gene pool, a knot is untied, and parts of the net disintegrate.
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So, what if we were to remove one species from the rainforest?
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Would the system fall apart?
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Probably not.
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The volume of species, their genetic diversity, and the complexity of the ecosystems
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form such rich biodiversity in this forest that one species gap in the weave won't cause it to unravel.
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The forest can stay resilient and recover from change.
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But that's not true in every case.
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In some environments, taking away just one important component can undermine the entire system.
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Take coral reefs, for instance.
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Many organisms in a reef are dependent on the coral.
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It provides key micro-habitats, shelter, and breeding grounds for thousands of species of fish, crustaceans, and mollusks.
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Corals also form interdependent relationships with fungi and bacteria.
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The coral itself is a loom that allows the tangled net of biodiversity to be woven.
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That makes coral a keystone organism, one that many others depend on for their survival.
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So what happens when destructive fishing practices, pollution and ocean acidification weaken coral, or even kill it altogether?
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Exactly what you might think.
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The loss of this keystone species leaves its dependence at a loss too, threatening the entire fabric of the reef.
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Ecosystem, species, and genetic diversity together form the complex, tangled weave of biodiversity that is vital for the survival of organisms on Earth.
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We humans are woven into this biodiversity too.
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When just a few strands are lost, our own well-being is threatened.
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Cut too many links and we risk unraveling it all.
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What the future brings is unpredictable, but biodiversity can give us an insurance policy, Earth's own safety net, to safeguard our survival.
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Context & Background

In the informative video titled "Why is biodiversity so important?" by Kim Preshoff, the speaker outlines the intricate interdependence within Earth's ecosystems. Preshoff emphasizes the vital role of biodiversity, highlighting how it is composed of ecosystem diversity, species diversity, and genetic diversity. The discussion encompasses the relationships found in natural environments, such as the Amazon rainforest and coral reefs. Through vivid examples, the speaker illustrates both the resilience that biodiversity affords and the potential consequences of its loss. This insightful dialogue serves as an essential reminder of our connection to the natural world and the importance of preserving its complexity for survival.

Top 5 Phrases for Daily Communication

  • Biodiversity is vital for the survival of organisms.
  • Our ecosystems are vulnerable to collapse.
  • Removing one species can undermine the entire system.
  • Genetic diversity allows species to cope with changes.
  • Coral reefs are keystone organisms in marine ecosystems.

Step-by-step Shadowing Guide

To effectively leverage the content of this video for improving your English, follow this step-by-step shadowing guide:

  1. Watch the Video: Start by watching the video once without pausing. This will give you a general understanding of the topic.
  2. Transcript Review: Read the transcript alongside the video. Pay close attention to key phrases that resonate, such as those listed above.
  3. Listen Actively: Use a shadowing app to listen to short segments. Repeat phrases immediately after the speaker to improve your English pronunciation and fluency.
  4. Break Down the Content: Focus on difficult sections. Replay them multiple times. Don’t rush; clarity is more important than speed.
  5. Practice Speaking: Once you feel comfortable, try summarizing the key points in your own words aloud. This will solidify your understanding and help in IELTS speaking practice.

Incorporating shadow speak techniques through this method will enhance your pronunciation and comprehension skills while enriching your vocabulary. Engaging with the video's content actively will ensure you grasp the nuances of the English language, preparing you for conversations about complex topics like biodiversity.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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