AQUATIC ECOSYSTEM

Question 1

are time-tested sampling techniques that are best suited for coastal areas techniques where access to a habitat is relatively easy

Answer 1

QUADRAT SAMPLING

Question 2

are complex systems that include a variety of organisms such as fish, invertebrates, algae, and shells, which are dependent on one another and to their environment for food, nutrients, and shelter

Answer 2

AQUATIC ECOSYSTEMS

Question 3

(TRUE/FALSE) More evenly represented species (evidenced by similar population sizes) illustrate a higher species evenness and an overall more diverse ecosystem

Answer 3

TRUE

Question 4

a measure of the relative abundance of each species

Answer 4

SPECIES EVENNESS

Question 5

What adaptations of these organisms would need to allow them to live in slow-moving environment?

Answer 5

• adaptations of legs that allow them to swim than holding on the substrates; shells for protection and camouflage from possible dangers

Question 6

What adaptations of these organisms would need to allow them to live in fast-moving environment?

Answer 6

• adaptations that can handle high velocity such as hooked feet(to hold on the rocky substrates) and streamlined bodies (to resist the drag)

Question 7

2 Different stream types

Answer 7

Slow-moving stream and Fast-moving stream

Question 8

organisms that live in the water column above the substrate

Answer 8

NEKTONIC

Question 9

organisms that dwell close to the substrates; bottom-dwellers

Answer 9

BENTHIC ORGANISMS

Question 10

Two categories of macroinvertebrate

Answer 10

BENTHIC AND NEKTONIC

Question 11

organisms visible to the naked eye and have no internal skeletal system or backbone; live part or all of their life in water

Answer 11

AQUATIC MACROINVERTEBRATE

Question 12

is the percent composition of an organism of a particular kind relative to the total number of organisms in the area or community. It is the best way to express the diversity in an ecosystem

Answer 12

RELATIVE ABUNDANCE

Question 13

two factors that are considered in measuring diversity

Answer 13

RELATIVE ABUNDANCE AND SPECIES EVENNESS

Question 14

The degree of similarity based on species composition between two sampling sites

Answer 14

INDEX OF SIMILARITY

Question 15

RELATIVE ABUNDANCE FORMULA

Answer 15

Relative Abundance = ((no. of individuals per genus species)/ (total no. of individuals)) x 100

Question 16

INDEX OF SIMILARITY FORMULA

Answer 16

IS = 2C/ S1+S2

where C= no. of species COMMON to both sampling sites
S1 = number of species in site 1
S2 = number of species in site 2