Page 7 - Freshwater-Biology-and-Ecology-Handbook

7.4 3-minute airlift sampling from deep wide rivers ................... 98 Chapter 3 ...........................................................................................134
7.5 Marginal sweep ....................................................................................... 99 Macroinvertebrate Status Classification
Methods ....................................................................................................134
7.6 Environmental measurements for RIVPACS ........................100
1 Macroinvertebrate data analysis for surveillance
8 Health and safety when collecting invertebrate and operational monitoring including status
samples ......................................................................................................102
classification ...........................................................................................138
9 Labelling .................................................................................................... 103
1.1 Overview ....................................................................................................138
10 Collecting field data ............................................................................ 105
1.2 Management context for river invertebrate
10.1 Site description form .......................................................................... 106 classification .......................................................................................... 140
10.2 Monitoring field data collection forms ...................................... 108 2 Metrics and indices ..............................................................................142
10.3 Electronic data collection ................................................................ 109 2.1 Introduction ..............................................................................................142
11 Laboratory versus field analysis of invertebrate 2.2 WHPT (Walley Hawkes Paisley Trigg) indices .....................144
samples .......................................................................................................110
2.3 Comparison of BMWP and WHPT ..............................................146
12 Laboratory analysis of samples for RIVPACS........................112
2.4 Calculating WHPT indices ..............................................................146
12.1 Laboratory sample reception .........................................................112
2.5 Correcting bias caused by analytical error .............................147
12.2 Basic principles .......................................................................................112
3 RIVPACS predictions and reference .........................................148
12.3 Preserving samples and specimens ..........................................113
3.1 The confounding influence of natural variation ....................148
12.3.1 Fixative .........................................................................................................113
3.1.1 The problem .............................................................................................148
12.3.2 Preservative ..............................................................................................113
3.1.2 The solution: RIVPACS community prediction .....................152
12.3.3 Packing and dispatching ....................................................................114
3.1.3 RIVPACS prediction of indices ......................................................153
12.4 Sieving and sorting ................................................................................114
3.1.4 River invertebrate classifications .................................................156
12.4.1 Sieving ..........................................................................................................115
3.2 How RIVPACS predicts an index ................................................ 160
12.4.2 Sorting tray ................................................................................................115
3.3 Predicting reference values for WHPT indices .....................161
12.4.3 Sorting process ......................................................................................116
3.3.1 Adjustment of predictions ................................................................162
12.5 Identification ............................................................................................118
3.3.2 Conversion of adjusted predictions to reference
12.6 Enumeration .............................................................................................119 values ..........................................................................................................165
Key documents describing laboratory analysis for 4 River invertebrate status classification in the UK ................166
RIVPACS ...................................................................................................120
4.1 Overview ....................................................................................................166
13 Quality assurance of laboratory analysis and data 4.2 Setting status class boundaries for WHPT indices
handling and data quality standards ...........................................122
using RIVPACS ......................................................................................170
14 Training .......................................................................................................124
4.3 Probabilistic classification ..............................................................172
15 STAR-AQEM sampling methodologies and 4.4 Using RICT2 software for classification in the UK .............. 174
synergies to RIVPACS .......................................................................128
5 Interpreting the results of WFD river invertebrate
status classification ............................................................................176
6 Acidification classification ..............................................................177
7 Compliance assessment and reporting ...................................179

Contents continued
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