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HABs and Climate Change Flashcards | StudBud
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HABs and Climate Change
HABs and Climate Change
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1
How is climate change shifting the biogeographical range of HABs?
Decreased intensity of storms
all of the above
Colder waters opening up more ecological niches (Polar regions)
Warmer waters shifting ocean circulation
2
Both increased and decreased nutrient availability are linked to more HABs
True
False
3
What is the percentage of primary production that ALL phytoplankton contribute?
10%
50%
20%
70%
4
Increased ocean temperatures are linked to increased phytoplankton growth
True
False
5
Phytoplankton that cause dead zones are always toxic
True
False
6
What are some of the consequences of ocean warming?
increased stratification leading to more ocean mixing and nutrients
increased stratification leading to less ocean mixing and less nutrients
decreased stratification leading to more ocean mixing and nutrients
decreased stratification leading to less ocean mixing and nutrients
7
Warming sea surface temperatures are linked to earlier phytoplankton blooms
False
True
8
Which of the following genera produce saxitoxins (paralytic shellfish poisoning)
none of the above
Alexandrium (dinoflagellates)
Microcystis (cyanobacteria)
Pseudo-nitzschia (diatom)
9
Why are phytoplankton important?
Primary production
top-down ecosystem drivers
nitrogen sequestration
all of the above
10
Which of the following phytoplankton groups are the oldest?
Haptophytes
Diatoms
Cyanobacteria
Dinoflagellates
11
Which part of the Alexandrium life cycle leads to "self-seeding" blooms in estuaries?
none of the above
Cysts
Planospores
Asexual Reproduction
12
Which of the following genera produce domoic acid? (Amnesic shellfish poisoning)
Alexandrium (Dinoflagellate)
Microcystis (cyanobacteria)
Pseudo-nitzschia (Diatom)
none of the above
13
Which of the following groups have HAB species?
All of the above
Cyanobacteria
Dinoflagellates
Diatoms
