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Ecology Lab > Activity : Some Common Biotic Sampling Methods > Flashcards

Activity : Some Common Biotic Sampling Methods Flashcards

1
Q

Populations and communities may be describes in terms of _____, _______, and ______

A

Density, frequency, and biomass

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2
Q

The total number of individuals in a given area

A

Abundance (N)

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3
Q

Number of individuals per unit or volume

A

Density (D)

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4
Q

Proportion of individuals of a species compared to total individuals of all species

A

Relative Species Diversity

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5
Q

Number of individuals of a given species from one location or time expressed as a proportion of the total number of individuals of that species for all locations more time sample

A

Relative Population Density

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6
Q

Number of samples containing a species, expressed as a proportion of total samples

A

Frequency

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7
Q

The frequency of the species divided by the sum of the frequencies of all species in the community

A

Relative Frequency of a Species

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8
Q

Weight of individuals in a population; expressed as dry weight for accuracy

A

Biomass

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9
Q

limited to live/freshly killed, taxonomically similar organisms

A

Dry mass

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10
Q

Number of individuals in a species

A

Species abundance

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11
Q

Number of species in a population

A

Species richness

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12
Q

Area of known size is randomly chosen and all individuals identified by ecological measurement

A

Plot Sampling

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13
Q

Method used in plot sampling

A

Quadrat method

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14
Q

the belt may be divided into intervals representing zones

A

Transect Sampling

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15
Q

Method used in transect sampling

A

Belt transect

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16
Q

What is used to sweep invertebrates and foliage of herbs?

A

Sturdy net

17
Q

Sampling methods that removes a small portion of habitat e.g., substrate/water at one time

A

Grab Sampling

18
Q

What is used in collecting samples in grab sampling?

A

Scoop nets, dredges

19
Q

Used for plankton sampling

A

Tow Net/Dip Net

20
Q

(WIND SPEED) Less water flowing through net

A

Too fast

21
Q

(WIND SPEED) Many organisms escape net

A

Too slow

22
Q

The number of opening within the cross metal threads of a net

A

Mesh size

23
Q

Expressed as numbers per cubic meter of
water

A

Density of organisms

24
Q

Distance toward multiplied by the area of the net opening

A

Volume of water

25
Q

Computation for Plankton Density

A

Sedgwick-Rafter counting cells

Ecology Lab (8 decks)

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