Ocean Properties
Halocline
a layer in the water column where salinity changes sharply with depth
Spring tide
sun and moon line up and combined gravitational pull produces greatest tide range
Mutualism
Both benefit
Holoplankton
Plankton for their whole lives
Rip current
a rush of water that flows rapidly back to sea through a narrow opening between sandbars
Neap tide
sun and moon pull are right angles to each other
Commensalism
1 benefits, the other is unnaffected
Meroplankton
grow up to be plankton
Mesopelagic (Twilight) zone
the ocean zone ~200-1000 m deep, with some light but not enough for photosynthesis
Semidiurnal
2 highs and 2 lows/day with equal tide ranges
Parasitism
One benefits, the other is harmed
Pleuston
Floating Plankton
Photic zone
the ocean layer that receives enough sunlight for photosynthesis
Diurnal
1 high and 1 low/day
Examples of parasitism
Ticks, lice, tapeworms
Nekton
Swim against current
Longshore drift
the process by which waves approach a beach at an angle carrying sand, then recede straight down and carry sand sideways down the beach
Semidiurnal mixed
2 highs and 2 lows/day with unequal tide ranges
Symbiotic Relationships
close relationship between 2 different species that benefits at least 1 species
Phytoplankton
Plant plankton