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Week 3- Terrestrial Plants - Coggle Diagram
Week 3- Terrestrial Plants
Basics of plant identification
basic plant anatomy
petiole
stipules
leaf
stem
compound leaf
leaf arrangement
Major plant groups (all are vascular plants)
gymnosperms
includes conifers, ginkgo, cycads, etc
3 families, 7 species native to singapore
gnetaceae (nee-tay-c) (4)
podocarpaceae (2)
cycadaceae (1)
naked seeded plants (no flowers or fruits)
ferns and fern allies
slow growing
many have compound leaves (called fronds) and creeping rhizomes
non-flowering, spore-producing plants
common in the understorey and as epiphytes in forests
angiosperms
monocots
no trees (monocots are never woody), mostly understorey herbs, some climbers and epiphytes
aroids, gingers, orchids, yams, grasses, palms
many are forest floor specialists, tolerant of low light conditions
dicots
everything else
key limiting resource to plant growth in Singapore's ecosystem is light!
not water -> high rainfall + low seasonality
sometimes nutrients -> but most areas are near to rivers/streams
plant growth forms
climbers
herbs/shrubs
trees
epiphytes
10 species of Singapore plants you must know
monocot angiosperm
Nypa palm (
Nypa fruticans
)
mangrove palm
often forms monodominant stands at edges of estuarine rivers (brackish waters)
understorey herb/shrub
numerous uses (attap roof, fruits can be eaten)
Bat Lily (
Tacca cristata
)
closely related to the "true yams"
pollinated by midges
understorey herb/shrub
in NSDF
BTNR, CCNR nature reserves (easily visible along trails)
highly modified inflorescence (flowering branch)
Tiger Orchid (
Grammatophyllum speciosum
)
flowers once every few years
large
epiphyte
orchid
possibly world's largest/heaviest orchid species
one of several nationally extinct orchid species, brought back by orchid breeding program
urban parks (eg SBG, upper peirce), streetscapes
dicot angiosperm
Sterculia macrophylla
late successional sp, lossely associated with swamp forests
bright red fruits, likely mammal/bird dispersal
tree
, from the cacao family
deciduous (leaves produced and shed synchronously)
heterolastic (seedling leaves and adult leaves very different)
S.macrophylla
and other
Sterculias
increasingly planted along streets/parks
Macritchie, BTNR, urban parks (e.g. Bishan AMK)
Keruing Dipterocarpus (
Dipterocarpus spp
.)
canopy species in primary forests across sg
double kneed petioles, large, "corrugated-sheet" leaves, long stipules
important timber
tree
(keruing)
BTNR, CCNR, planted along parks and roadsides
common mahang (
Macaranga bancana
)
early successional, pioneer/gap species
tri-lobed leaves with long petioles (stalks)
fast growing small
tree
Common Rhu (
Casuarina equisetifolia
)
often forms monodominant forests in reclaimed lands
highly tolerant of salt spray, sandy soils, dry conditions
native coastal
tree
species, looks like conifer but not a conifer
naturally, coastal locations
roadside tree in many streets
Slender pitcher plants (
Nepenthes gracilis
)
carnivorous plant that uses modified leaves to trap insects (mostly ants)
found in nutrient poor habitats, especially resam dominated scrubland and adinandra belukar
climber
heteroblastic -> produces different types of pitcher during rosette and climbing growth stages!
found in kent ridge park, macritchie reservoir edges, NTU
fern
Staghorn fern (
Platycerium coronarium
)
found along roads, nature reserves
produces two types of fronds
shielf and antler fronds
antler fronds are pendulous in
P.coronarium
often found in branch forks of large trees
ephiphyte
fern
accumulate leaf litter in shield fronds
decomposing litter are nutrients for fern
microhabitat for many small animals
gymnosperm
Belingjau (Gnetum gnemon)
distinct trunk, twigs, and leaves
dioecious (male and female plants)cultivated for edible nuts (melinjo)
forest
tree
species found naturally in india and SEA
planted along roads and parks, in abandoned plantation forests (thomson nature park)
plant traits reveal differing strategies along a conservative-acquisitive continuum
conservative strategy (effective in late sucessional forests)
traits
more defensive compounds
heavier wood
thick leaves
large seeds
dipterocarpaceae species: dominant canopy species in lowland primary forests across tropical Asia
acquisitive strategy (effective in disturbed habitats)
Macaranga spp. (Euphorbiaceae). A forest gap/edge specialist
falcataria falcata (fabaceae): An invasive species and one of the fastest growing trees in the world
traits
thin leaves
less defensive compounds
lighter wood
small seeds
functional traits: measurable morphological or physiological attributes of species that influences their ecological success
functional traits are often correlated with each other because species are limited in the resources they can invest (morpho-physiological constraints)
the external environment contributes strongly to the success/failure of different resource acquisition strategies