Activity 2: Abiotic Components of the Aquatic Habitat

Question 1

The non-living part of an ecosystem

Answer 1

Abiotic Factors

Question 2

Creates zonation and stratification

Answer 2

Temperature

Question 3

Most oxygen, constant replenish from atmosphere

Answer 3

Epilimnion

Question 4

Has oxygen at beginning of summer but used up until gone

Answer 4

Metalimnion

Question 5

Little to no oxygen

Answer 5

Hypolimnion

Question 6

Filter feeders that help in cleaning the waters

Answer 6

Bivalves

Question 7

When they multiply, it causes red tides

Answer 7

Dinoflagellates and invertebrates

Question 8

Affects distribution of gasses, salts, and small organisms; Limited to freshwater and marine environment

Answer 8

Current

Question 9

______ causes warm water to move more toward the coast

Answer 9

El niño

Question 10

_______ causes cold water to move away from the coast

Answer 10

La niña

Question 11

The amount of oxygen that is present in water and affected by temperature, salinity, respiration, photosynthesis

Answer 11

Dissolved Oxygen

Question 12

Indicator of pollution

Answer 12

Low dissolved oxygen

Question 13

total amount of soluble salts in water or soil

Answer 13

Salinity

Question 14

The amount of hydrogen ions in an aqueous medium (pH) is related to the relative concentrations of carbon dioxide, bicarbonate, and carbonate ions; regulate the rate of total community metabolism

Answer 14

pH

Question 15

the calcium and magnesium content of the water that causes _______

Answer 15

Hardness

Question 16

Used to measure the hardness of water as well

Answer 16

Meter sticks

Question 17

(WATER HARDNESS SCALE) Less than 1 grains

Answer 17

Soft

Question 18

(WATER HARDNESS SCALE) 1 - 3.5 grains

Answer 18

Slightly hard

Question 19

(WATER HARDNESS SCALE) 3.5 - 7 grains

Answer 19

Moderately Hard

Question 20

(WATER HARDNESS SCALE) 7-10 grains

Answer 20

Hard

Question 21

(WATER HARDNESS SCALE) Over 10 grains

Answer 21

Very Hard

Question 22

Most dominant gas in the atmosphere (78%)

Answer 22

Nitrogen

Question 23

Nitrogen-based compounds

Answer 23

Ammonia, nitrates, nitrites

Question 24

What happenes through lightning?

Answer 24

Nitrogen fixation

Question 25

They are needed to help in the nitrogen fixation process

Answer 25

Nitrifying bacterias

Question 26

Helps in nitrifying the nitrogens in the soil

Answer 26

Mycorrhiza

Question 27

Main ingredient for fertilizers

Answer 27

Phosphorus

Question 28

Largest biome, covering 71% of earth’s surface

Answer 28

Aquatic habitat

Question 29

Main abiotic factor in aquatic habitats

Answer 29

Water

Question 30

Temperature readings are taken at different depths

Answer 30

Above the water, two inches below the surface, and at the bottom

Question 31

where the water will separate into layers of different temperatures

Answer 31

Thermal stratification

Question 32

What tends to have higher concentration of dissolved oxygen?

Answer 32

Colder, deeper water

Question 33

This create habitat diversity, supporting different aquatic species

Answer 33

Temperature gradients

Question 34

Material that supoorts plant growth and forms a layer beneath another stratum

Answer 34

Substratum

Question 35

Measures the amount of matter floating in water

Answer 35

Total solids

Question 36

Large particles trapped by filters during filtration

Answer 36

Total Suspended Solids (TSS)

Question 37

Smaller particles that pass through the filter

Answer 37

Total Dissolved Solids (TDS)

Question 38

What does High TSS indicate?

Answer 38

Cloudy water, reducing sunlight penetration

Question 39

(SALINITY UNITS) Used for seawater salinity

Answer 39

Parts per thousand (PPT)

Question 40

(SALINITY UNITS) Dimensionless unit based on conductivity measurements

Answer 40

Practical Salinity Units (PSU)

Question 41

A method that can be used in measuring DO concentrations

Answer 41

Winkler method

Question 42

What does higher DO levels indicate?

Answer 42

Better water quality

Question 43

What does below 5 mg/L DO concentration indicates?

Answer 43

Stress or pollution for aquatic life

Question 44

Phosphate determination involves measuring the ___________

Answer 44

Concentration of orthophosphate (PO₄³⁻)

Question 45

What does low orthophosphate concentration indicate?

Answer 45

Unpolluted water

Question 46

Where does high orthophosphate levels lead to?

Answer 46

Eutrophication

Question 47

Eutrophication results increased populations of primary producers like _______, leading to _________

Answer 47

Plankton ; algal blooms

Question 48

What abiotic factors are temperature-dependent?

Answer 48

Dissolved oxygen, Metabolic Rates, Nutrient Availability, Water Density and Stratification, Viscosity and Movement, and Turbidity