ASTM D4134-82(2012)
(Practice)Standard Practice for Sampling Phytoplankton with a Clarke-Bumpus Plankton Sampler (Withdrawn 2020)
Standard Practice for Sampling Phytoplankton with a Clarke-Bumpus Plankton Sampler (Withdrawn 2020)
SIGNIFICANCE AND USE
4.1 The advantages of the Clarke-Bumpus plankton sampler are as follows:
4.1.1 It will sample a discrete depth or multiple depths, depending upon the sampling design.
4.1.2 It is a slow to medium speed sampler requiring a towing speed of 3 to 5 knots.
4.1.3 The sample size can be easily controlled.
4.1.4 The sampler is light-weight and can be used without auxiliary equipment.
4.1.5 It has a relatively high filtration efficiency factor of 0.88.
4.1.6 It is a versatile sampler and can be used in all but the shallowest waters.
4.1.7 The flowmeter records the amount of water that passes into the net.
4.1.8 Overspill of water at the mouth of the net due to excess speed of towing is of minimal consequence.
4.2 The disadvantages of the Clarke-Bumpus plankton sampler are as follows:
4.2.1 The flowmeter requires frequent maintenance including calibration and lubrication.
4.2.2 It is not suitable for use in very small areas or shallow waters.
4.2.3 Because of the use of a net as a filtration material, the sample is semiquantitative.
4.3 There are several special considerations that shall be observed when using a Clarke-Bumpus sampler. They are as follows:
4.3.1 The flowmeter should be calibrated and serviced frequently to ensure efficient and accurate operation.
4.3.2 The sampler is relatively fragile, particularly the closing device and flowmeter. This necessitates careful deployment and recovery procedures.
4.3.3 Following each collection, the net must be thoroughly washed.
4.3.4 Special attention must be given to the strength of the cable and its attachment to avoid loss of the sampler.
4.3.5 The sampler should not be used in beds of macrophytes, in waters containing submerged objects, or close to the bottom.
4.3.6 The net should be inspected frequently for pin-size holes, tears, net deterioration, and other anomalies.
4.3.7 Following use, the wet net should be suspended full length in air and in subdued light and...
SCOPE
1.1 This practice covers the procedures for obtaining semiquantitative samples of a phytoplankton community by use of a Clarke-Bumpus plankton sampler.
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
WITHDRAWN RATIONALE
This practice covers the procedures for obtaining semiquantitative samples of a phytoplankton community by use of a Clarke-Bumpus plankton sampler.
Formerly under the jurisdiction of Committee D19 on Water, this practice was withdrawn in May 2020. This standard was withdrawn without replacement due to its limited use by the industry.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4134 − 82 (Reapproved 2012)
Standard Practice for
Sampling Phytoplankton with a Clarke-Bumpus Plankton
Sampler
This standard is issued under the fixed designation D4134; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4.1.5 It has a relatively high filtration efficiency factor of
0.88.
1.1 This practice covers the procedures for obtaining semi-
4.1.6 It is a versatile sampler and can be used in all but the
quantitative samples of a phytoplankton community by use of
shallowest waters.
a Clarke-Bumpus plankton sampler.
4.1.7 The flowmeter records the amount of water that passes
1.2 This standard does not purport to address all of the
into the net.
safety problems, if any, associated with its use. It is the
4.1.8 Overspill of water at the mouth of the net due to
responsibility of the user of this standard to establish appro-
excess speed of towing is of minimal consequence.
priate safety and health practices and determine the applica-
4.2 Thedisadvantages of the Clarke-Bumpus plankton sam-
bility of regulatory limitations prior to use.
pler are as follows:
2. Referenced Document 4.2.1 The flowmeter requires frequent maintenance includ-
ing calibration and lubrication.
2.1 ASTM Standards:
4.2.2 It is not suitable for use in very small areas or shallow
D4137 Practice for Preserving Phytoplankton Samples
waters.
4.2.3 Because of the use of a net as a filtration material, the
3. Summary of Practice
sample is semiquantitative.
3.1 The sampler is towed from a moving boat at a specified
4.3 There are several special considerations that shall be
depth. The sampler uses a net for the concentration of
observed when using a Clarke-Bumpus sampler. They are as
organisms and, as such, may be considered to be a semiquan-
follows:
titative sampler. It is quantitative in that the actual volume of
4.3.1 The flowmeter should be calibrated and serviced
water entering the sampler is measured by a calibrated flow
frequently to ensure efficient and accurate operation.
meter. The phytoplankton are preserved as dictated by the
4.3.2 The sampler is relatively fragile, particularly the
objectives of the study.
closing device and flowmeter.This necessitates careful deploy-
4. Significance and Use ment and recovery procedures.
4.3.3 Following each collection, the net must be thoroughly
4.1 TheadvantagesoftheClarke-Bumpusplanktonsampler
washed.
are as follows:
4.3.4 Special attention must be given to the strength of the
4.1.1 It will sample a discrete depth or multiple depths,
cable and its attachment to avoid loss of the sampler.
depending upon the sampling design.
4.3.5 The sampler should not be used in beds of
4.1.2 It is a slow to medium speed sampler requiring a
macrophytes, in waters containing submerged objects, or close
towing speed of 3 to 5 knots.
to the bottom.
4.1.3 The sample size can be easily controlled.
4.3.6 The net should be inspected frequently for pin-size
4.1.4 The sampler is light-weight and can be used without
holes, tears, net deterioration, and other anomalies.
auxiliary equipment.
4.3.7 Following use, the wet net should be suspended full
length in air and in subdued light and allowed to dry.
This practice is under the jurisdiction of ASTM Committee D19 on Water and
is the direct responsibility of Subcommittee D19.24 on Water Microbiology.
5. Apparatus
Current edition approved Sept. 1, 2012. Published October 2012. Originally
5.1 The Clarke-Bumpus plankton sampler, Fig. 1, consists
approved in 1982. Las
...
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