Biology lecture 3 Flashcards
How long does GENE Flow Disruption take?
Gene flow disruption, aka isolating mechanisms can take between 4,000-40 million years.
What is the Coriolis effect?
In the rotation of the earth, air and water move clockwise in the northern hemisphere and counter-clockwise in the southern.
Thermoclines
layered temperature of the water, warmer on top and colder (but with more oxygen) at the bottom
Haloclines
Layering of the water, the saltier (heavier) water is at the bottom and the less salty on top
Bathymetry
the topography of the sea floor.
Define upwelling
In upwelling, strong off-shore winds pull nutrient rich cold water to the surface, breaking up the thermocline layers.
How do AIR CURRENTS come about
Air currents are the result of the rising warm air and the Coriolis affect.
What six factors of ECOLOGY influenced evolution of marine birds and mammals
GLECPO
Global ecology Landscape ecology Ecosystem ecology Community ecology Population ecology Organism ecology
What is a positive result of upwelling
The introduction of the nutrient and oxygen rich water from the deeper waters to the surface brings more species in.
Spring tide
spring tide is when the difference between high and low tides is the greatest.-the moon pulls more at the earth than the sun.
Neap tide
Neap tide is when the difference between the high and the low tides is least.-the moon and sun are perpendicular to the earth.
As the earth spins we have __ high and low tides.
as the earth spins we have two high and low tides
During the winter, the southern winds push water from the equator to the ___
During the winter, the southern winds push water from the equator North.
Trophic levels
levels based on what they eat.
Primary Producers-> Primary consumers-> secondary consumers
Food chain
food chain is the transfer of energy from different trophic levels
