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Biodiversity and conservation

-^ -^ =^ -^ - - ,^ -^ - - -^ - - \ -^ - - \ ,

Term biodiversity ' E-dwardwis.IO

diversity

that exist^

all levels^

of

biological organisation

Ra a

vomito = ' Reserp-

2) species diversity dirt > @ the (^) level

of Sps^

. F-

How many species in the globe? IUCN @ (^004) ) =^ I^ -^ million plants of animals

Robert

May -_7ion Scientifically

Sound

'

7- of

animals

a (^) s ② = =¥ , (^22) :/ Plants ③ 28-100-0 A

70% ' insects I.

**Pattern of biodiversity gradient

1. Latitudinal gradient** × . = '

Columbia

'

5°^ 7-^ in^ Pole

Greenland

105 QNewyork ¥^1 235N Tropics ✓

Latitude :X

•- or 235 eg:D^ Ares Temperate

1. (^) disthof Vascular^ plants
2. (^) AMAZE

÷ :÷÷: __

Tropics →

T biovide.si/y- Temp → Moderate " Pole →^

least

Why tropic is more biodiverse?

• (^) Tropical environments^ are^ less^ seasonal^ , relatively more (^) constant (^) and predictable climate

Availability

of

more solar^

energy (^) , which contribute much productivity

• More evolutionary time (^) obtained

for speciation^

.

i (^) It Teslas^ in more biodiversity in (^) tropics ¥¥A

Yr 1 Few (^) weeks '

Pole

IEPE-ted-T-E.in .

fruit eating

birds

' ✗ (^) z -^ value^ '

F

'

steeper

' slope Sps ¥-

¥due)

richness ✗ t15②

2- Value

' tanto ' r

ZIT

2= Area

2 = 0^ 2 =^ 0-^ = Th^ z →°T Sps

. (^) oichnes 22 0^ 2=t2-_ = large^ area phness

Importance of species diversity in an ecosystem Species diversity (^) Productivity Species diversity Stability David Tilman : g.

" I

Species diversity Reseliance of the ecosystem Against disturbances Species diverse ecosystem resist the invasion of exotic species

3.^ X

A -_