Aquatic Insect Ecology
Lecture Exam 1 Exam
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Latest Updated 2026
,What is the Multiple Freshwater Invasions hypothesis?
236 families in 18 of 44 orders independently invaded water.
The first insects were likely (terrestrial/aquatic).
Terrestrial.
Note: Scientists think that as the land masses started to rise, then precipitation,
elevation, and freshwater habitats formed, this led to the development or genesis
of terrestrial habitats. The first insect that appeared on earth, we presume to
have been terrestrial.
Pick the phylogeny that has the primary aquatic orders.
A. Odonata
B.Coleoptera
C. Trichoptera
D.Hemiptera
E. Both A and C
F.Both B and C
E. Both A and C
Note: Slide 21 on first PP.
When we say that an insect is aquatic, we generally mean that the__stage is aquatic.
larval
, What are first degree colonizers?
Orders with all aquatic species. For example, Odonata, Ephemeroptera, Plecoptera,
Megaloptera, and Trichoptera.
Also called primary colonizers.
What are secondary colonizers?
Aquatic species from largely terrestrial lineages. For example, some Lepidoptera
species.
List at least two second degree colonizer lineages.
Some lineages of Diptera, Coleoptera, and Lepidoptera.
What are the two biggest insect orders on earth?
Diptera and Coleoptera.
What are sclerites?
Individual plates on the insect body; made out of an exoskeleton, or chiton.
What is the most common aquatic insect life history?
Most of the feeding and energy is acquired by and stored in the immature stages, and
the adult life stage is often short (only reproduces).
How do many aquatic insects have the best success at reproduction?
Why are there no aquatic insects in the ocean?
Crustaceans and other sea-dwelling organisms have been there longer and can
out-compete their land-evolved brethren (other organisms already fill their
niches).
Lecture Exam 1 Exam
Verified and Provided with
A+ Graded Answers|
Latest Updated 2026
,What is the Multiple Freshwater Invasions hypothesis?
236 families in 18 of 44 orders independently invaded water.
The first insects were likely (terrestrial/aquatic).
Terrestrial.
Note: Scientists think that as the land masses started to rise, then precipitation,
elevation, and freshwater habitats formed, this led to the development or genesis
of terrestrial habitats. The first insect that appeared on earth, we presume to
have been terrestrial.
Pick the phylogeny that has the primary aquatic orders.
A. Odonata
B.Coleoptera
C. Trichoptera
D.Hemiptera
E. Both A and C
F.Both B and C
E. Both A and C
Note: Slide 21 on first PP.
When we say that an insect is aquatic, we generally mean that the__stage is aquatic.
larval
, What are first degree colonizers?
Orders with all aquatic species. For example, Odonata, Ephemeroptera, Plecoptera,
Megaloptera, and Trichoptera.
Also called primary colonizers.
What are secondary colonizers?
Aquatic species from largely terrestrial lineages. For example, some Lepidoptera
species.
List at least two second degree colonizer lineages.
Some lineages of Diptera, Coleoptera, and Lepidoptera.
What are the two biggest insect orders on earth?
Diptera and Coleoptera.
What are sclerites?
Individual plates on the insect body; made out of an exoskeleton, or chiton.
What is the most common aquatic insect life history?
Most of the feeding and energy is acquired by and stored in the immature stages, and
the adult life stage is often short (only reproduces).
How do many aquatic insects have the best success at reproduction?
Why are there no aquatic insects in the ocean?
Crustaceans and other sea-dwelling organisms have been there longer and can
out-compete their land-evolved brethren (other organisms already fill their
niches).
