marine organisms that swim strongly enough to move against the current
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15
What are the two types of hard bottom shelf communities?
Kelp forests and beds, and rocky bottom communities(covered with dense seaweed)
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15
What is the difference between deposit feeders and suspension feeders?
deposit feeder vacuum up what is on the bottom.(common to muddy bottom)suspension feeders filter what is floating in the water(common to sandy bottoms)
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15
What is the key food source in an unvegetated soft bottom community?
detritus that floats in from other communities (like estuaries) diatoms are prevalent here, but not in enough numbers to provide a plentiful food source.
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15
How can an otter population affect a kelp forest?
They eat sea urchins. If the otter population goes down, sea urchins increase, and start eating the base of the giant kelp as their food gets scarce.
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15
What are two ways some algae protect themselves from being over eaten?
marine organism that is unable to swim strongly enough to move against the current
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15
What is the difference between seaweed(seaweed is macroscopic algae) and seagrass?
seagrasses are considered vascular plants and have roots, stems and leaves, seaweed are multi-cellular algae and have little or no vascular tissues.
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lifesaver
Give 25 points!
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fairy
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fairy
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thief
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15
List 2 of the primary consumers in a vegetated soft bottom shelf community.
Manatee, nudibranch, sea urchins, sea turtles, and Canadian geese
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15
Is this a male or female nematode? how can you tell?
male, it has a curve at the posterior end
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25
Which of the meiofauna we looked at have 1. A basal disk, 2. A corona, 3.2 toes, 4. Is unable to attach to the substrate.
1. Hydra, 2.rotifer, 3.rotifer, 4 nematode
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15
Manatees look like they can withstand cold temperatures, but they are mostly found in tropical areas. Why?
Their large girth is due to a large digestive system to hand hard to digest plant material, not blubber like arctic animals.
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15
What are some characteristics of the seaweeds that are able to timeshare space?
seasonal,(perennial) only grow during certain seasons, and others are fast growing and have a short life cycle (growing in the same space the perennials grow)
