RAINFOR GEM Intensive Plots Manual (pdf) - University of Oxford

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Coarse litter flux per unit mass/surface area calculationFor coarse litter CO 2 efflux measurements we need CO 2 efflux units per unit dry mass rather than per unitground/stem. To calculate CO 2 efflux per unit litter dry mass (R lm , g CO 2 /h per kg litter dry mass) and surfacearea (R la , g CO 2 /h per m 2 litter surface area) use the following:RRlmla1= Rc∗ ∗ LA1= Rc∗ ∗ LaAmWhere L m and L a are litter dry mass (kg) and surface area (m 2 ) respectively. For equations for estimating R la fordecomposing litter of various shapes see Harmon et al. (1999).78
CO 2 flux measurements with EGM: A field guideCO 2 measurements from soil and tree collars once a monthEquipmentEGM (CO2 analyser)ChamberComputerWaterproof bagUSB–RS port cableTemperature sensorSoil moisture sensorData sheets or notebookPencilsPlot mapThe EGM must not get wet (it will break)!Don’t measure in heavy rain.Transport the EGM and the computer in awaterproof bag.StartingConnect the chamber to the EGM.Turn the Charge / Run switch of the EGM to Run andturn the On / Off switch to On.Warm-up, wait 5 to 10 mins (EGM temperature will go up to ~50°C).1REC 2SET 3CAL4DMP 5CLR 6CLKPress 1 (REC)DATA FITTING1LINEAR 2QUAD.?Press 1 (LINEAR)1DT:120 2DC: 503APPROX.TEMP. 25Press YSOIL RESP. DATARECORD 1ALL 2ENDPress 1 (ALL)V: 1171 A: 78V/A*100: 1491Press YPress Y79
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Measuring Tropical ForestCarbon All
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ContentsTHE RAINFOR-GEM INTENSIVE C
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The RAINFOR-GEM Intensive Carbon Mo
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What are the RAINFOR-GEM protocols?
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Where can I get data from existing
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Two RAINFOR-GEM hectare plots in th
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1.2 Setting out the plotSubplot cor
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An example surveying path (cf. Cond
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Required for jobs that can be sched
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Tree #487 in Fragment E plot where
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1.4 Tagging small trees*** Note tha
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does, measure underneath the lean o
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Measuring a liana at three points i
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BOX 2: Five unusual trees.Example 1
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Example 3: Here is a large liana on
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1.5 Tree heightTree height should b
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1.6 Sketch map of the plotAt this p
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2. BELOW GROUND MEASUREMENTSWe star
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Next, insert the cylindrical core i
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BOX 3: How to make an in-growth cor
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2.2 RhizotronsRoot observation pits
Page 45 and 46: sure that it covers the hole but no
Page 47 and 48: An example rhizotron transparency f
Page 49 and 50: Analysis: First, calculate the sum
Page 51 and 52: A metallic rhizotron as in use at t
Page 53 and 54: 2.3 Coarse rootsNeither in-growth c
Page 55 and 56: 3. CO 2 EFFLUX3.1 Total soil CO 2 e
Page 57 and 58: 3.2 Stem CO 2 effluxFirst, choose t
Page 59 and 60: e related to stem growth) to check
Page 61 and 62: Equipment: IRGA and SRC-1, PVC coll
Page 63 and 64: Control No litter Double litterNo e
Page 65 and 66: the S3 hole. Finally, discard the l
Page 67 and 68: 3.4 Coarse woody debris (CWD) CO 2
Page 69 and 70: 4.2 Coarse woody debris (CWD) surve
Page 71 and 72: all of the large, marked wood piece
Page 73 and 74: Equipment: 25 litter traps per ha (
Page 75 and 76: this select the straight line drawi
Page 77 and 78: http://www.eci.ox.ac.uk/research/ec
Page 79 and 80: • The tripod is level so that the
Page 81 and 82: 8. WEATHER AND CLIMATELocal climate
Page 83 and 84: Luiz Aragão repairing an understor
Page 85 and 86: 10. DATA ENTRY AND SERVER UPLOADA c
Page 87 and 88: APPENDIX I: RAINFOR-GEM Fieldwork c
Page 89 and 90: APPENDIX II: How to use an EGM-4 In
Page 91 and 92: • Remember to change the switch i
Page 93 and 94: CO 2 efflux calculationsWhile the E
Page 95: The volume V airspace (stippled) be
Page 99 and 100: Downloading dataEGM memory can stor
Page 101 and 102: APPENDIX III: Possible schedule of
Page 103 and 104: Gerwing JJ, Schnitzer SA, Burnham R
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