Permanent Sample Plots for Forest Monitoring in Fiji
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Transcript of Permanent Sample Plots for Forest Monitoring in Fiji
Permanent Sample Plots for Forest Monitoring in Fiji
Pacific GIS/RS Conference,Holiday Inn,
Suva.24th December 2010
“You cannot manage, what you cannot map”
Overview
• Objectives
• Plots Design and Layout
• Plot Forms
• Plots Established.
Permanent Sample Plots
• Establishment of an Annual Allowable Cut (AAC) for Fiji’s natural forest, to ensure that harvesting is done at a level which the forest can biologically support.
Permanent Sample Plots
First Phase:
• Awareness are done to Resource Owners first from Administrative Level and Provincial Level.
• Awareness also conducted to Mataqali Heads where the plots are located.
• Establishment of Sample Plots
Plot Layout
PLOT LAYOUTPLOT LAYOUT
50 m
20m
20m
50 m
3m
CIRCULAR PLOT
3.0cm but less than 1.0m- tallied
>than 1.0 m but less than 9.9cm dbh These trees are tallied
SUB PLOT
All trees greater than 10 cm dbh but less than 29.9 cm dbh are measured.
Height taken & recorded
MAIN PLOT
All trees greater that 30cm dbh are recorded and height measured
5m5m
5m
5m
30cm
30cm
5m
30cm
30cm
BIO MASS CIRCULAR PLOTAll dead or alive materialThis spot only above the ground
3m
20m
20m
Main Plot
• 50m by 50m
• Measure all trees with diameter GREATER THAN 30 cm in diameter using a diameter tape and recorded in the field recording form. The trees are identified, numbered using yellow paint and recorded in the field recording form.
• Tree heights measure using Height Pole.
• Record if the trees bear fruits or seeds during the time of assessment
• Record if there is any dead trees standing or alive within the plot.
Subplots• 20m by 20m
• All regeneration trees which are GREATER THAN EQUAL TO 10cm diameter but LESS THAN EQUAL TO 29.9 cm
• The trees are identified, numbered using red paint and recorded.
• The tree heights are measured using a Height pole.
• Record if the trees bear fruits or seeds during the time of assessment
• Record if there is any dead trees standing or alive within the plot.
Circular Plot• All regeneration trees LESS THAN ONE METER are
identified, tallied on to the field form.
• Also for those trees which are GREATER THAN or EQUAL TO ONE METER height and LESS THAN 3cm DBH.
• Measure trees GREATER THAN EQUAL TO 3cm DBH but LESS THAN EQUAL TO 9.9cm. The color that is being used is blue paint.
• Three meters stick stress out to the circumference of the circular plot. Fishing line or ribbons at the end to locate the circumference of the plot. Clockwise identify the tree species and count the trees making sure not miss a single tree or recount an existing tree.
Biomass Circular Plot
• The 4 corner of the 50 x 50m plot (5m by 5m from main plot)
• All the dead organic matters found on the spots are collected and stored in a plastic bags
• Wet weight are recorded on a digital scale and then dried-up on a oven and then weigh again to record the dry weight.
Plot Forms
DISTURBANCE REMARKS FOREST CHARACTERISTICS REMARKS
Invasive Species These are invasive species such as African tulips, Rain tree , all exotic species
Primary Virgin forest and unlogged. No disturbance is done
Clearing These are clearing done by people for agricultural purposes or by just cutting trees
Secondary with natural regeneration
Logged forest with regeneration growing as under growth
Fire If past burning do reached the plot then we assess the extent of fire
Secondary with enriched planting
Logged forest with some enriched plants like mahogany or other species that do grow in the area
Natural Disaster(Cyclone)
These are cyclone damages or tycoon which may travelled through these plots
Secondary with enriched plants
Secondary forest with blown over species such as mahogany, pine seedling or other species exotic species
Livestock The damages done by the livestock like cows, horse, or wild pigs are assessed and recorded
Plantation Inside a plantation forest or manmade forest (wood lot).Mainly species that were planted.
Insect Any type of insect damages such as die back, beetle attack
Disturbance and Forest Characteristics
Plots Established
PSP Plot Distribution:
Plots are distributed on the 12 Km on grid spacing on Viti Levu and 11 Km on Vanua Levu.
Plots Established
PLOTS ESTABLISHED BY PROVINCE – Viti Levu
PROVINCE No of Plots Plot Established
Ba 12 12
Nadroga 5 5
Navosa 10 10
Naitasiri 9 9
Namosi 2 2
Ra 9 9
Rewa 1 1
Serua 7 7
Tailevu 5 5
Total 60 60
ProvinceTotal No of
PlotsPlots
Established
BUA 9 9
MACUATA 15 15
CAKAUDROVE
16 16
TOTAL 40 40
PLOT ESTABLISHMENT FOR VANUA LEVU
Permanent Sample Plots - Measured
Why Manage Forests?
• Better Resource Planning
– Informed decisions by using “what if” scenarios.
– Sustainability of forests resources
– Identifying of areas under threat
– Setting of priority areas
Vinaka Vakalevu
Questions ?????