19 Flashcards
Marine Biota?
Marine organisms living in the pelagic environment (plankton and nekton) or the benthic environment (benthos)
h-neutral?
Neither source nor sink; input = output
Is the current atmosphere a sink/source?
Sink
Outcomes of climate change will be spatially and temporally variable. What are some examples of outcomes? 3•
•Magnitude of climate change effects depends n species and location
•Greater variation in climate
•Higher frequency of extreme precipitation events
Phenology?
The timing of key life cycle events in response to environmental cues (e.g., first flower, egg laying).
Acclimatization?
When an organism adapts to environmental changes to maintain fitness.
What are three possible differences in organisms if habitat becomes unfavourable? 3•
•Shift in time
•Shit in space
•Shit in phenotype
Extinction if they fail to respond
More/less birds over elevation ranges expansion or contraction when moving up elevational gradients?
Expansion
As lower elevation species move up elevational gradients, what can happen to species already in high elevations?
They will go towards extinction.
What could cause range shifts in unexpected directions?
Perhaps species is tracking hangers in some other climate variable, or the land they once lived in is suitable again (maybe previous predator became extinct), or humans made land suitable for them.
If the ocean acidifies when an increased CO2 concentration enter the ocean to create carbonic acid, what is the first likely affects?
Calcium carbonate will start dissolving, which will affect coral reefs which many are made from calcium carbonate, and shells that are relied on by may marine species.