Term
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Definition
Set average point of highest and lowest tides over year (varies by location)
-set by observation |
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Term
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Definition
Only 1 high and 1 low tide per day
-Tropical Regions |
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Term
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Definition
| In line: very high tide, very low tide, great differences |
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Term
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Definition
| Moon at right angles; least total difference |
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Term
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Definition
2 highs and 2 lows per day
-California |
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Definition
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Gulf of Mexico
-3 tides per day
-Low tidal range |
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Term
| Where is the greatest tidal change? |
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Definition
Long Narrow Bay or Gulf
-Bay of Funday: E. Canada 25 ft |
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Term
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Definition
North wind blows out to sea, South wind blows inland
-Storm Surge |
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Term
| Tidal currents in narrow places: |
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Definition
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Term
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Definition
| River Flowing to sea can reverse flow in strong tide |
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Term
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Definition
| Exposure to water and air vanes |
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Term
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Definition
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Term
| How do they prevent from drying out |
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Definition
Can move to pool or lower tide level (crabs)
Hide in burrow (Uca)
Go into crack or under shade
Keep water under shell |
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Term
| Changes Intertidal Life Deals with |
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Definition
Temperature Changes
UV light |
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Term
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Definition
Less tolerant to air and temp changes
Biological interactions important |
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Definition
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Definition
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Term
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Definition
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Term
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Definition
Roughness
3-dimensional aspect |
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Term
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Definition
| Exposure to surf, exposed to surf or not, angle of rocks |
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Term
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Definition
Protection from Predators
Nursery area
Lots of food
Tidal rhythms (Uca) |
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Term
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Definition
Larger grain size
Drains easily
Beach has high slope |
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Term
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Definition
Smaller grain size
Less drainage
More Life
Sand is Cohesive
Beach has lower slope |
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Term
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Definition
Granite
Limestone
Lave
Shell |
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Term
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Definition
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Term
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Definition
| Sets can cancel each other or build each other |
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Term
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Definition
| When wave height = water depth |
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Term
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Definition
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Term
| What type of motion is within a wave |
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Definition
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Term
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Definition
| Seconds for crest to go 1 wave length |
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Term
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Definition
| Less wave action, sand deposited |
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Term
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Definition
| Storms, sand removed and goes off shore |
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Term
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Definition
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Term
| Where does sand come from? |
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Definition
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Term
| Where does sand come from in TX? |
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Definition
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Term
| What happens when sand is caught behind dams? |
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Definition
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Term
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Definition
| Small rock breakwaters (jetties) catch sand |
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Term
| What happens when the wave breaks? |
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Definition
| Water runs up, some sinks, rest of it runs back: backwash |
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Term
| When water runs along the beach |
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Definition
| Longshore current runs out to sea in ripcurrent |
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Term
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Definition
| Loose sand, little FW, dry, hot or cold |
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Term
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Definition
| Plants can shed salt grasses, long roots |
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Term
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Definition
| Have stolons (runners) cover sand like carpet (beach morning glories) |
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Term
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Definition
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Term
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Definition
Dry beach, wet by highest tides and storms
Insects and Crustaceans: Beach Hoppers and Ghost Crabs |
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Term
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Definition
Beach hoppers, in surf: Donax, palpworm and other worms
Eaten by larger crabs: speckled crab
Bird: Sanderling, Ruddy Turnstone |
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Term
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Definition
Sand is cohesive-good for constructing burrows
less porosity
drains slowly
silt can accumulate between sand grains |
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Term
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Definition
| Space between sand grains |
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Term
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Definition
| Tiny animals that live in interstices or on sand grains |
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Term
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Definition
Top layer contains free O2
Sand is gray-tan
Redox layer: boundary
Below is the zone of decomposition |
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