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Ecology Lab > Activity 2: Abiotic Components of the Aquatic Habitat > Flashcards

Activity 2: Abiotic Components of the Aquatic Habitat Flashcards

1
Q

The non-living part of an ecosystem

A

Abiotic Factors

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2
Q

Creates zonation and stratification

A

Temperature

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3
Q

Most oxygen, constant replenish from atmosphere

A

Epilimnion

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4
Q

Has oxygen at beginning of summer but used up until gone

A

Metalimnion

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5
Q

Little to no oxygen

A

Hypolimnion

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6
Q

Filter feeders that help in cleaning the waters

A

Bivalves

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7
Q

When they multiply, it causes red tides

A

Dinoflagellates and invertebrates

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8
Q

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

A

Current

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9
Q

______ causes warm water to move more toward the coast

A

El niño

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10
Q

_______ causes cold water to move away from the coast

A

La niña

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11
Q

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

A

Dissolved Oxygen

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12
Q

Indicator of pollution

A

Low dissolved oxygen

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13
Q

total amount of soluble salts in water or soil

A

Salinity

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14
Q

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

A

pH

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15
Q

the calcium and magnesium content of the water that causes _______

A

Hardness

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16
Q

Used to measure the hardness of water as well

A

Meter sticks

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17
Q

(WATER HARDNESS SCALE) Less than 1 grains

A

Soft

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18
Q

(WATER HARDNESS SCALE) 1 - 3.5 grains

A

Slightly hard

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19
Q

(WATER HARDNESS SCALE) 3.5 - 7 grains

A

Moderately Hard

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20
Q

(WATER HARDNESS SCALE) 7-10 grains

A

Hard

21
Q

(WATER HARDNESS SCALE) Over 10 grains

A

Very Hard

22
Q

Most dominant gas in the atmosphere (78%)

A

Nitrogen

23
Q

Nitrogen-based compounds

A

Ammonia, nitrates, nitrites

24
Q

What happenes through lightning?

A

Nitrogen fixation

25
Q

They are needed to help in the nitrogen fixation process

A

Nitrifying bacterias

26
Q

Helps in nitrifying the nitrogens in the soil

A

Mycorrhiza

27
Q

Main ingredient for fertilizers

A

Phosphorus

28
Q

Largest biome, covering 71% of earth’s surface

A

Aquatic habitat

29
Q

Main abiotic factor in aquatic habitats

A

Water

30
Q

Temperature readings are taken at different depths

A

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

31
Q

where the water will separate into layers of different temperatures

A

Thermal stratification

32
Q

What tends to have higher concentration of dissolved oxygen?

A

Colder, deeper water

33
Q

This create habitat diversity, supporting different aquatic species

A

Temperature gradients

34
Q

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

A

Substratum

35
Q

Measures the amount of matter floating in water

A

Total solids

36
Q

Large particles trapped by filters during filtration

A

Total Suspended Solids (TSS)

37
Q

Smaller particles that pass through the filter

A

Total Dissolved Solids (TDS)

38
Q

What does High TSS indicate?

A

Cloudy water, reducing sunlight penetration

39
Q

(SALINITY UNITS) Used for seawater salinity

A

Parts per thousand (PPT)

40
Q

(SALINITY UNITS) Dimensionless unit based on conductivity measurements

A

Practical Salinity Units (PSU)

41
Q

A method that can be used in measuring DO concentrations

A

Winkler method

42
Q

What does higher DO levels indicate?

A

Better water quality

43
Q

What does below 5 mg/L DO concentration indicates?

A

Stress or pollution for aquatic life

44
Q

Phosphate determination involves measuring the ___________

A

Concentration of orthophosphate (PO₄³⁻)

45
Q

What does low orthophosphate concentration indicate?

A

Unpolluted water

46
Q

Where does high orthophosphate levels lead to?

A

Eutrophication

47
Q

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

A

Plankton ; algal blooms

48
Q

What abiotic factors are temperature-dependent?

A

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

Ecology Lab (8 decks)

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