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Study Guide - Humans and their Environment Rocky Intertidal...

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Humans and their Environment: 01/18/06 Rocky Intertidal Fresh water Wetlands---Functions: good water filtration systems nursery grounds, lots of animals spend their life cycles in wetland areas rich in wild life: birds, turtles, snakes, plankton -More than half of wetlands have been drained (cali. has lost about 90 %) Primary Produciton is high, plant growth is fast (cat tails, rushes, sedges), because of this we have a lot of dentritis---bits and pieces of dead plants float in water, called organic detritis Fairly rapid decomposiiton Flowing waters-Lotic systems (freshwater rivers, creeks, riviolettes) -typically have two main regions: Rapids Region------animals must be able to remain in place and not be swept away ie. insects have hooks on legs (6 hooks), hold onto rocks, some have suckers, some attach themselves to rock with little string and can re attach to rock even if they get swept away), some form tubes out of bits and pieces of wood or sand grains and secrete mucose and form houses-----popular with fisherfolk, get live bait from larger insects who live in these tubes physical characteristics changes from headwaters to ocean- river is fed leaves, leaf litter, insects feed on this material (shredders feed on bigger pieeces of wood by shredding it up, filter feeders filter foods) large variety ofmicro organisms that are decomposing the really small organic matter and converting into minerals. ..phyto. ...zoo. ...small fish. ..large fish Lot of dissolved organic matter in water---particulate organic matter amino acids _dissolved organic matter-can color water if there’s a lot. .. OCEANS: Reasons for zonation: animals at bottom can’t tolerate water from top 3. competition for space 1.exposure to air, how well they can tolerate air or heat 2. fear of predators
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Diversity is often high Tropical areas: rocky coast line is not rock, it’s actually coral on ISLANDS. Mainland: in rocky shores oyster beds grow, oysters are eaten by snails Sandy beaches: animals get sandblasted on surface so they burrow in sand and live underneath the surface common in sand: worms, snails (olive snail), clams (pizmo clam, bean clam can be found on surface and is really tiny) crabs: look like little armored tanks, feed on detritis and plankton off of antennae, like a filtering system with antennae (gross crabs in tropics) shoreline fishes: surf purch and grunyun microscopic fauna, mile fauna, roundworms, nemotauds, cope pods(tiny crustaceans and roundworms) amazing diggers---main predators:gulls and shore birds shore birds are adapted to feeding on different levels of sandy beach, prey on diff. organisms depending on where they live. MAJOR SOURCE OF FOOD: Kelp Drift----gets torn off the rocks and there are lots of storm waves coming in, you see millions of flies and there are beatles and insects that feed on the kelp drift----not marine animals they’re terrestrial animals at night: crustaceans live in sand come out. Emphipods are most common that feed on kelp
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Study Guide - Humans and their Environment Rocky Intertidal...

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