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Geography
Woodland Ecosystem
-The Tai Po Kau Nature Reserve Field Study
Yip Ching Yi
Chan Hao Yan
Foreword
The Tai Po Kau Nature Reserve has a good
environment with fresh air, rich diversity of
plant species, trees with special characteristics of
roots and leaves, etc.
This powerpoint would show you more details of
them! Enjoy in the nature!
Introduction of The Tai Po Kau
Nature Reserve
• It is a forest reserve
located on the road
between Tai Po and the
Chinese University of
Hong Kong
• It is Hong Kong's largest
secondary forest
• It holds good stands of
mature plantation and
native trees.
Details Of Our Field Study
• Date: 16th January, 2010
• Weather:
- temperature: 18 C
- light intensity: intense
- relative humidity: 55%
- wind speed: low
Start now!
There are many plants in The
Tai Po Kau Nature Reserve,
most of them are useful. Now,
let’s introduce these plants to
you!
This is a herb which can be
used to make herbal tea.
Its flowers are white, but
now we cannot see the
flowers because it is not the
season they grow!
They are Archidendron
clypearia which belong
to Mimosaceae .
They are
Lemmaphyllum
microphyllum. They
intercrescence on
trunks or rocks.
They are Rubus reflexus.
There are fluff on the surface
of leaves, and stings at the
bottom of leaves.
Tree species
-This is Liquidambar formosana
which originated in Hong Kong.
-Height: the maximum is 40m
- Uses:
1. trunk :make dried
mushrooms
2. Resin :medicine
3. Woods :building.
4. Leaves :feed saturniid
-In summer: the leaves are
yellow
-In winter: the leaves are red
-The leaves smell sweet if we
shutter them!
This is Ficus microcarpa, which
is evergreen.
Layered Structure
Five layered structures in the forest:
1.Emergent layer
2.Canopy layer
3.Understory
4.Shrub layer
5.Forest floor
Relationship between layered
structure and light intensity
Light intensity
With the higher
layer, more light
intensity received.
Lower layer
Middle layer
Emergent layer
Relationship between layered
structure and light intensity
Little sunlight reaches
the ground layer.
This tree belongs
to emergent layer.
Buttress roots are always growing sideways from trees. These
give increased stability and also bring surface nutrients to
their trees.
Buttress roots help trees to remain standing, and overcome
the challenges of high winds or soft unstable ground. In forest
like Tai Po Kau’s, buttress roots are relatively small but in
tropical forests they can reach 10 metres or more.
Epiphytes
Epiphytes live attached to trees, they
do not live from trees in the regard,
parasites are fundamentally different,
they actually tap into the body of trees
or other plants, seeking nutrients by
taking them from the host tree or
plant.
Climbers
They are named Climbing
Entada which are climbers.
They are woody plants that
start at ground level. They
climb along the trees to
reach the canopy where
they will spread from tree
to tree to get as much
sunlight as possible.
There are many
animals in The Tai Po
Kau Nature Reserve
too!
They are termite, the greatest
decomposers. Do you know what
they were doing? They were
destroying the wood!
The huge hole is the
destruction made by termite!
Simplified Nutrients
cycle
Biomass
Litter
Soil
Other learnings
Those white areas
are Lichans.
Lichens are composite
organisms consisting of a
symbiotic association of a
fungus with a photosynthetic
partner, usually either a green
alga or cyanobacterium.
Annual growth rings
The concentric circles show how old
the tree was when it died. This is
because each tree ring shows one fast
growing season, which in Hong Kong
is the hot, wet summer. Every year the
tree adds another outer woody layer.
Reflection
During the trip, we found that there are so many
plant species in the forest, they are special and
useful, which we have never seen them before, we
learned a lot! On the other hand, we were excited
that we could understand more about what we had
learnt from the books in the trip, such as layered
structure of trees. The resources in the forest are
treasures, we have to protect them, and not to
destroy them!
The End.
Thank you so much for watching!