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<v Speaker 0>The next presentation will be given by Eva mclennan from

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<v Speaker 0>the Department of Biology.

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<v Speaker 0>Eva's presentation is titled How The Shapes We Build Shape

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<v Speaker 0>Ecosystems.

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<v Speaker 1>57 million square meters three times the area of the

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<v Speaker 1>Liwan territory referred to as Victoria BC.

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<v Speaker 1>That's how much extra intertidal real estate we've created on

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<v Speaker 1>structures like these at major shipping ports around the world.

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<v Speaker 1>And that doesn't include any of the smaller docks, marinas,

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<v Speaker 1>seawalls and breakwaters that pepper the coasts.

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<v Speaker 1>The real number is many times greater.

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<v Speaker 1>So much extra space and organisms are growing there.

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<v Speaker 1>But are these communities reminiscent of the natural ones on

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<v Speaker 1>rocky shores?

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<v Speaker 1>I've been going out to these sites along with their

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<v Speaker 1>natural neighbors to catalog who lives there.

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<v Speaker 1>And so far they're completely different artificial structures like these

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<v Speaker 1>ones don't mimic natural environments very well.

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<v Speaker 1>They're smooth and don't house crevices for squishy creatures like

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<v Speaker 1>sea stars and an enemies to hide in.

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<v Speaker 1>They're made of different materials often treated with harsh chemicals.

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<v Speaker 1>They're typically associated with broad flat structures which shade the

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<v Speaker 1>water below limiting the ability of algae at the base

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<v Speaker 1>of the food chain to grow and produce food for

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<v Speaker 1>the rest of the ecosystem.

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<v Speaker 1>The next time you're near one of these structures, take

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<v Speaker 1>a look, instead of a balanced biodiverse community of algae,

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<v Speaker 1>sensitive squishy creatures like those an enemies and tough, hard

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<v Speaker 1>bodied species like barnacles and mussels.

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<v Speaker 1>You'll mostly see the hard ones here and what an

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<v Speaker 1>organism is made of determines what it demands from its

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<v Speaker 1>environment.

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<v Speaker 1>My research looks at communities as pools of elements, carbon

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<v Speaker 1>nitrogen, phosphorus, calcium and that's what I'm investigating.

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<v Speaker 1>Next.

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<v Speaker 1>57 million square meters three Victorias where a whole lot

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<v Speaker 1>of essential elements are being hoarded.

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<v Speaker 1>These organisms wouldn't be here if these structures didn't exist.

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<v Speaker 1>As far as the rest of the ecosystem is concerned,

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<v Speaker 1>they act as a sink of essential nutrients.

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<v Speaker 1>I'm processing my samples now to figure out exactly which

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<v Speaker 1>elements their bodies are hoarding, which can tell me something

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<v Speaker 1>about how they influence the way nutrients move through coastal

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<v Speaker 1>ecosystems and whether they threaten nearby natural reefs by demanding

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<v Speaker 1>too much from a shared water source.

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<v Speaker 1>Understanding the pressure they place on nutrient cycles can inform

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<v Speaker 1>management and engineering decisions to promote healthy, balanced biodiverse communities.

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<v Speaker 1>How we shape literally shape our world determines the identity

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<v Speaker 1>and health of our aquatic neighbors.

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<v Speaker 1>Thank you.

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