2021 09 27 Lecture 9 TEK Popn Ecology PDF

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Piazza Poll How familiar were you with Traditional Ecological Knowledge before this class? (a) I knew nothing (b) I knew a bit (c) I was quite familiar with it (d) Let me teach the class

(c) Prof. M. Tseng UBC

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BIOL230 – Mon. Sept 27, 2021 – Lecture 9 1. 2. 3. 4.

Population Ecology from Mon. Sept 20 Prof. Wall Kimmerer lecture - recap Kobluk et al 2021 – two figures Population ecology cont’d

(c) Prof. M. Tseng UBC

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Quick Recap L1 9/8 - Overview

L10 9/29 – Popn ecology

L2 9/10 – Impt of ecol/5 key proc.

L11 10/1 – Popn ecology

L3 9/13 – 5 key proc, Evoln Kahoot

L12 10/4 – Caribou case study

L4 9/15 – Life history/plasticity

L13 10/6 – Review for Midterm 1

L5 9/17 – Size selective harv. cont’d, plasticity, thermal reaction norms

L14 10/8 – Midterm 1, During class

L6 9/20 – Reaction norm evolution, kelp video L7 9/22 – Prof. Wall Kimmerer – self study L8 9/24 – Hannah Kobluk guest lecture - kelp

L15 10/13 – Predator Prey pt 1 L16 10/15 – Predator Prey pt 2 L17 10/18 – Urban Pollinators pt 1 L18 10/20 – Urban Pollinators pt 2

L9 9/27 – TEK revisited; Popn ecology

(c) Prof. M. Tseng UBC

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Frequently Asked Questions Practice midterm please? Pretty please? What’s more important – lecture notes or textbook readings? Is the Kimmerer lecture on the midterm? Guest lecture too? How much lab material will be on the midterm? Can you help with this lab quiz?

(c) Prof. M. Tseng UBC

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Lecture 6 Learning Objectives (From Sept 20) 1. Describe how sea urchins affect kelp population size 2. Explain two methods of estimating population size 2. Rephrased: Distinguish between Area Based Counts and Mark-Recapture approaches to counting the number of individuals in an area

(c) Prof. M. Tseng UBC

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Populations vs Individuals – terms You need to know the general definitions of these terms from the textbook Ramet

Population size

Individual Genet

Population density

Absolute population size

Population Relative population size

(c) Prof. M. Tseng UBC

Estimating Population Size (skip distance methods) Area-Based Count Works well when…. a) Individuals can be counted ____________

b) Quadrats are an accurate representation of ______________ (c) Prof. M. Tseng UBC

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Estimating Population Size (skip distance methods) Mark Recapture • Example: 23 butterflies are captured and marked (M). • Later, 15 butterflies are captured (C), 4 of them marked (R for recaptured). • To estimate total population size (N):

M / N = R /C

N = (M ´ C) / R (c) Prof. M. Tseng UBC

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Today: Lecture 9 Learning Objectives 1. From RWK video lecture: Describe 3 key differences between traditional ecological knowledge and western science 2. From HK guest lecture: Interpret figures 2 and 3 from the study 3. Describe the relationship between Mnemiopsis, zooplankton, chlorophyll a, and anchovy landings in the Black Sea (c) Prof. M. Tseng UBC

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1. Dr. Robin Wall Kimmerer lecture 3 key differences between TEK and WS? (Discuss with neighbour)

(c) Prof. M. Tseng UBC

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2. Kobluk et al 2021: Fig. 2a Effect of harvesting Results: “We found little support for an effect of harvest treatment on relative biomass recovery”

(c) Prof. M. Tseng UBC

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2. Kobluk et al 2021: Fig 2b % fronds removed What does this figure say?

(c) Prof. M. Tseng UBC

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2. Kobluk et al 2021: Fig 2c % Biomass removed What does this figure say?

(c) Prof. M. Tseng UBC

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2. Kobluk et al 2021: relative importance of different factors on post-harvest growth (3a) ecological models

(c) Prof. M. Tseng UBC

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2. Kobluk et al 2021: relative importance of different factors on post-harvest growth (3b) Indigenous experts

(c) Prof. M. Tseng UBC

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2. Kobluk et al 2021: Importance of local knowledge

(c) Prof. M. Tseng UBC

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Piazza Poll: Personal opinion Would you be interested in learning more about Traditional Ecological Knowledge? (Maybe not in this class but a different one)

(a) Not sure / Neutral (b) Not really, thanks tho (c) Maybe a bit more (d) I’d love to learn more

(c) Prof. M. Tseng UBC

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Population Dynamics

(c) Prof. M. Tseng UBC

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Background to the video Eutrophication: excess of nutrients in a water body, usually leads to abnormally high densities of phytoplankton Richard Kirby Smithsonianmag.com

Phytoplankton: microscopic algae, single celled or colonies, photosynthesize, form the base of the aquatic food chain

Zooplankton: usually planktonic, eat phytoplankton, can be microscopic or large; eaten by larger organisms like fish

wikipedia

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What happened to zooplankton biomass after Mnemiopsis biomass peaked?

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What happened to phytoplankton biomass after zooplankton biomass crashed?

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How did Mnemiopsis biomass affect anchovy catches? Why?

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Practice Midterm Question Kobluk et al 2021 concluded that there was no effect of harvest on growth of Egregia kelp, and figure 2a from their paper supported this result. Draw a figure similar to Figure 2a but that supports the result of “Egregia growth was significantly lower in harvest treatments than in control treatemtns”.

(c) Prof. M. Tseng UBC

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Today: Lecture 9 Learning Objectives 1. From RWK video lecture: Describe 3 key differences between traditional ecological knowledge and western science 2. From HK guest lecture: Interpret figures 2 and 3 from the study 3. Describe the relationship between Mnemiopsis, zooplankton, chlorophyll a, and anchovy landings in the Black Sea (c) Prof. M. Tseng UBC

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