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Keycap Digit One

Theme D - Continuity & Change

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Direct Hit

Theme A - Unity & diversity

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Page Facing Up

Theme B - Form & Function

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Pill

Theme C - Interaction &  Interdependence

Hey there, young biologist! Ready to delve into the world of bark beetles and spruce trees? Let&rsquo;s dive in! 🚀

<ul>
	<li>Native to North America.</li>
	<li>Loves to snack on weakened trees 🌳.</li>
	<li>Healthy spruce trees 💪: Can fend off moderate beetle attacks.</li>
	<li>Unhealthy spruce trees 😓: More prone to beetle attacks, especially when they&#39;re stressed by climate events.</li>
</ul>

🌎 Real-World Connection: It&rsquo;s like how we&#39;re more likely to get sick when we&#39;re stressed out. Trees under stress can&#39;t defend themselves as effectively against these pesky beetles!

<ul>
	<li>Warmer Temperatures
	<ul>
		<li>Pros for Beetles: Speeds up their life cycle.</li>
		<li>Cons for Trees: Stresses them out, especially with less rain causing droughts.</li>
	</ul>
	</li>
	<li>Beetle Life Cycle
	<ul>
		<li>Cooler Years: They chill for 2 years before attacking trees. 🕰️</li>
		<li>Warmer Years: They&rsquo;re on a hurry! Life cycle takes only a year. ⏱️</li>
	</ul>
	</li>
	<li>Attack Patterns
	<ul>
		<li>2-Year Cycle: Beetles emerge unsynchronized. They pop out sporadically in low numbers.</li>
		<li>1-Year Cycle: All the beetles decide to party at once. They emerge in big numbers and attack trees.</li>
	</ul>
	</li>
	<li>Where&#39;s the Beetle Party?
	<ul>
		<li>Alaska 🏔️, Colorado 🌲, British Columbia 🍁, and Utah 🏜️.</li>
	</ul>
	</li>
	<li>The Double Whammy: Warm temperatures make spruce trees weaker and beetles stronger. Trees get attacked more often and more fiercely. 🌡️🔥</li>
</ul>

🌎 Real-World Connection: It&#39;s like when there&#39;s a big sale on your favorite snack at the store. Normally, people come and go buying the snack, but when it&rsquo;s on sale (warmer temperatures), everyone rushes in at once to grab as much as they can (beetles attacking trees)!

Note: I can&#39;t see Figure 17, so here&#39;s a guide on how to answer based on the info given!

a. Drought Index

<ul>
	<li>Identify two periods when the drought was high for 3 or more years in Figure 17.</li>
</ul>

b. Temperature Trends

<ul>
	<li>Check the trends in mean annual temperature from 1970 to 2000. Is it getting hotter or cooler?</li>
</ul>

c. Beetle Outbreaks: i. Spot the differences in beetle attacks between the 1970s and 1990s. ii. Think of reasons why these outbreaks might&#39;ve been different. (Hint - Think climate!)

d. Future of Spruce Trees

<ul>
	<li>Based on trends, predict the fate of spruce trees. Will more trees be destroyed in the future?</li>
</ul>

🌲 Happy studying! Remember, every detail in biology connects to our vast ecosystem. By understanding these interactions, we can work towards a better future for our planet. 🌍🌟

Climate Change Accelerates Spruce Bark Beetle Life Cycle

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Higher Level

Biology HL

Theme D - Continuity & Change

Climate Change Accelerates Spruce Bark Beetle Life Cycle

Table of content

The Spruce Bark Beetle, Dendroctonus rufipennis 🔍

Unlock the Full Content!

Theme D - Continuity & Change

Climate Change Accelerates Spruce Bark Beetle Life Cycle

Table of content

The Spruce Bark Beetle, Dendroctonus rufipennis 🔍

Unlock the Full Content!