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28 Cards in this Set
- Front
- Back
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Fetch |
The distance over which air moves unimpeded by a land mass |
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What characterises dissipative coasts? |
Gently sloping offshore substratum Fine sediments Rich fauna Low energy |
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What characterises reflective coasts? |
Coarse sediments Large waves Steep slopes Impoverished fauna High energy |
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Wave propagation along the coast |
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What determines upper distributional limits on rocky shore zonation? |
Physiological tolerance to physical factors (therml stress, dessication) |
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What determines lower distributional limits on rocky shore zonation? |
Physical tolerance, bio-interactions, growyh form and life span. |
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Critical tide level theory |
Tides are responsiblenfor zonayion seen on rocky shores. |
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Tides |
Rhytmic rise and fall of sea levels. |
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Diurnal tides |
One high and one low per day |
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Semi-diurnal |
Rise and fall twice a day (successive highs and lows approx equal in heihht) |
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Mixed tides |
Twice a day, unequal higs and lows |
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Features that modify tides |
Basin morphology Mid ocean islands and ridges Atolls High latitude, vs low latitude coasts |
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Factors that canaffect or influence tides |
Meterological events Hurricanes, typhoons, storms Geological events Submarine earthquake, sudden massive shifts on the sea floor |
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Photoperiodism |
The response of an organism to seasonal changes in day length. |
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Photomorphogenetic |
Process by which plants grow and develop in response to light signals. |
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Chlorophyta chlorophyll pigments |
Chl a chl b |
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Euglenophyta chlorophyll pigments |
Chla Chl b |
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Heterokontophyta |
Chl a Chl c1 Chl c2 Accessory pigments (diatoxanthin, fucoxanthin) |
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Phaeoohyta |
Chla Chlc1 Chlc2 Accessory pigments |
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Pyrrophyta |
Chla Chlc Peridinin phycobiliproteins(phycocyanins &phycoerythrin) |
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Cyanophyta |
Chla Phycobiliproteins(phycocyanins & phycoerythrin ) |
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Cryptophyta |
Chla, Chl c, phycobiliproteins and accessory pigments |
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Circadian rythmns |
24 hr cycle metabolic or behavioural activiy |
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How does light influence functions of marine plants and algae |
Metabolic activiy Reproduction Distribution with depth Circadian rythmns |
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How does light influence marine plants and algae structure? |
Changes in size Production of flagells Buoyancy regulation |
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Photosynthetically Active region |
Electromagnetic region where chlorophylls and other light harvesting pigments absorb light. Ranges from 380nm-700nm Some algae can absorb as low as 300nm |
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Photon flux density |
A measure of the number of photons per second per unit area |
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Maximal light energy absorption wavelengths Of pigments |
Chlorophyll a - 425nm and 650 nm Chlorophyll b - 490nm and 620nm Phycocyanin - 620 Phycoerythrin - 500-550 |
