Lecture Script:

Welcome to today's lecture on the impact of climate change on marine ecosystems. As we know, the Earth's climate is rapidly changing due to human activities, and this has profound effects on our oceans. Marine ecosystems are particularly vulnerable to these changes, affecting not only the organisms living within them but also the entire food chain. The rising sea temperatures, ocean acidification, and sea-level rise are some of the key consequences of climate change that directly impact marine life. Researchers have observed shifts in the distribution of marine species, with some moving towards the poles in search of cooler waters, while others face population declines due to habitat loss. These changes have cascading effects on the ecosystem, disrupting the delicate balance of predator-prey relationships and species interactions. One example is the coral reefs, which are bleaching at an alarming rate due to warmer waters, leading to the loss of biodiversity and the collapse of entire reef ecosystems.

Now, let's take a moment to address a student question.

Student: How can we mitigate the effects of climate change on marine ecosystems?

Professor: That's a great question. One effective strategy is to reduce our carbon footprint by using renewable energy sources and promoting sustainable fishing practices. Additionally, creating marine protected areas can help safeguard critical habitats and allow marine species to thrive. It's crucial that we act swiftly to protect our oceans before irreversible damage occurs.

Questions:

Answer Key:

1. (B)

2. (A)

3. (A)

4. (A)

5. (B)