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Flashcards in BIOL 329 Deck (665)
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1

distinguishing a risso dolphin

scars, whiten with age, tall dark sickle-shaped (crescent moon) fin, rounded head

2

distinguishing grizzly bear from brown black bear

grizzlies have hump on back - enlargement of shoulder blade bones for larger muscles attachment - lots of digging, forehead to nose is more concave

3

distinguish sea otter

much bigger than river otter, flat tail, dense fur, swim in groups, front paw, back flippers, rarely come on land

4

number of tetrapod species

~32,000

5

tetrapods

Amphibia
Reptile
Aves
Mammalia

6

defining tetrapod feature

legs

7

defining lizard, bird, mammal feature

lungs

8

defining reptilia, aves feature

scales

9

defining aves feature

feathers, wings

10

defining mammal feature

hair, mammary glands

11

World Wildlife Fund classification of BC

globally outstanding ecoregion

12

BC size (geographically)

Bigger than any European country except Russia and any US state except Alaska

13

BC fauna diversity

More vertebrate species than any other province or territory in Canada

14

# BC amphibia species

~20
43 in Canada
~7000 worldwide

15

# BC reptile species

~20
51 in Canada
~9600 worldwide

16

# BC bird species

~530
615 in Canada
~10,000 worldwide

17

# BC mammals

~150
207 in Canada
~5500 worldwide

18

BC plants

3150 species
richest flora in Canada

19

why does BC have such rich flora/fauna

very diverse biogeoclimatic zones

20

levels of threat and extinction graph

years (increasing up y axis), vs. probability of extinction (0 -1 increasing down x axis)
safe line is straight with high slope, vulnerable has small curve and pretty high slope, endangered has big curve extending along x axis

21

levels of threat and extinction

safe: 0.1P in 100y
vulnerable: 0.2P in 20y
Endangered: 0.5P in 10y
Critically endangered: >0.5 in 10

22

mammals vs. reserve size graph

# of individuals vs. area
min. population size is a horizontal line
small herbivores, large herbivores, large carnivores are subsequent diagonal lines
where the lines cross is minimum area required to sustain animal population

23

minimum population size to survive

~2500

24

minimum reserve area for small herbivores

10km^2

25

minimum reserve area for large herbivores

~5000 km^2

26

minimum reserve area for large carnivores

>100,000 km^2 --- doesn't exist

27

species listing categories

extinct
extirpated
endangered
threatened
vulnerable

28

extinct species listing

species no longer exists on the planet

29

extinct examples (BC)

Steller's sea cow
Dawson Caribou (1915)

30

extirpated species listing

species no longer exists in the region but still exists in other geographical areas