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Monitoring – Waipapa Ecological Area, Pureora
At least ten
specimens of each species were selected. For
those dioecious plant species (e.g. the podocarps) twenty individuals were
selected in the hope that sufficient samples of male and female productivity
could be assessed. Individual trees
were not all chosen at random. A
large number of trees were largely selected on our ability to be able to clearly
see much of their foliage and from within a fairly circumscribed part of the
main study area to reduce the time taken to monitor all of the trees.
On average a total of 130 individual trees were monitored on a regular
All trees were individually marked with numbered aluminium tags and grouped into “plots” which were conspicuously marked at access points. Précis maps of the location of plots and tagged trees were also drafted as an aid to relocation.
Given the size of the tree species being monitored (up to 40+ m) the use of binoculars and a spotting scope mounted on a tripod was mandatory. Data was recorded on to prepared data sheets as follows:
each individual plant the number of flowers and fruits per cubic metre of
potential flower and fruit bearing foliage/surface was estimated using seven
size classes. It should be noted
that this estimate was also “averaged” over the entire tree (more accurately
the part of the tree capable of producing flowers and fruits) and that a cubic
metre will often take on different shapes dependent on the structure of the tree
and where flowers and fruits are produced.
The seven size classes were as follows:
This classification hopefully provides a reasonable quantitative estimate of the number of flowers and fruits that are being produced.
percentage of flowers open and fruits ripe provides some indication of the
maturity relative to the numbers of flowers and fruit recorded per cubic metre.
This is backed up in greater detail by the columns recording the
developmental stages of flowers and fruits.
These categories are defined as follows:
stage of flowers:
stage of fruit:
groundfall column provides something of a check as to what is going on up
in the tree as well as highlighting any fruiting or flowering that may have been
missed between monthly checks. The
four size classes represent quick counts of individual flowers and fruits found
directly below a tagged tree.
Timing of Events
Put stockings on seed trays at the end of November, replace monthly until the end of June when you remove the last stocking. Put a plastic label in each stocking with the seed tray number and the date it was brought in. Dry above the fire in the hut and send to group leader. Seed trays are numbered and mapped for easy collection.
Manuka. Record flowering intensity in at least 50 plants as viewed from the specified location.
0 = no flowers, 1 = <20% canopy area with flowers, 2 = 20 - 50%, 3 = 50 - 80%, 4 = >80%.
This same method is used for Rata, Dracophyllum longifolium, Kamahi,
Cyathodes juniperina, Pseudopanax simplex ( large trees>2m high),
Coprosma lucida (large trees>2m high)
This same method is used for Rata, Dracophyllum longifolium, Kamahi, Cyathodes juniperina, Pseudopanax simplex ( large trees>2m high), Coprosma lucida (large trees>2m high)
Gahnia procera Record flowering intensity (number of flower
stems) in at least 50 individual tussocks along the track between Observation
Rock and the Summit.
Astelia fragrans Record flowering (yes/no) in at least 60 large
plants (above waist height) along or near the Summit track from sea level to the
Observation Rock track junction.
Phormium tenax Record total number of flowering stalks as seen from track when walking from the log crossing of the Creek to the woodens sign “Summit”. Limit sample to plants west of Sealers Creek.
June - Annual Measurements of Rata Growth
Measure (mm) previous (P) and current (C) years shoot
extenstion growth on 5 canopy shoots from 10 rata trees growing near the track
between Observation Rock and the Summit. Do not include terminal bud length.