Week 10- Climate change

Define anthropogenic climate change

Human caused global warming and climate change

What are the physical effects of climate change on oceans

Warming, deoxygenation, melting ice caps, sea level rise, increased storminess/extreme weather, ocean acidification

Is spatial warming consistent across the globe

No

What is happening to temp anomalies globally

Increasing

Where is air temp rising more rapidly than anywhere else in the world

S.Ocean

Is the atlantic or pacific more oxygenated and why

Atlantic more oxygenated but lower nutrient due to waters age and how its used by primary producers

What does high nutrient input lead to

Stimulate algal blooms, then die and sink off

Bacteria; decomposition of bloom uses oxygen= hypoxia and anoxia

How does zooplankton being poikilothermic link to climate change

They are cold blooded so reliant on environment and physiological processes are sensitive to temp

What is an immediate response of zooplankton to climate change

Short lived

Are zooplankton commercially exploited

Not in the main

Are zooplankton planktonic

Most of life

What do temperatures which ectotherms thrive at set

The upper and lower thermal window for physiological processes

What does a more complex poikilotherm lead to

Decreased thermal amplitude

What is the equation for organism fitness

E_g = E_I - E_R

E_g - Energy for growth, reproduction

E_I - Energy input

E_{R -} Energy loss from respiration

How does thermal window change

• Width changes with life stahe

• Limited shift in TW due to change in functionality/endurance

• Biogeographies can overlap species with different TWs

Define stenothermal

Narrow acclimatized window

Define eurythermal

Wide acclimatized window

What impacts does temp have on zooplankton

Species distributions, biodiversity, body size, phenology, abundance