Plants have adapted as they compete for resources, space, light,
food and water, temperature, weather/seasons, a balance of nutrients, try to
reproduce and battle predators. They have found ways to create toxins, hunt
prey, deceive other animals and more. The movement and growth of plants takes
place slowly so we do not always notice them. Bristlepines are the oldest
living things on earth. Bamboo is the fastest growing plant, growing to 30
meters in 90 days.
Forest canopies restrict the growth of plants below them. Some
plants have adapted to ways to climb larger trees as scaffolding to reach the
tree above the canopy so they can get enough light to flower. Some plants grow
in the tops of other plants. Sundews, Venus flytraps (I have one which is
flowering), and other plants catch prey. Sundew use a sticky dew like substance
to hold prey and roll over prey to harvest the insects for nitrogen. Venus
Flytraps envelop prey in mouth like leaves that trap the prey in cages. We had
pitcher plants in Oregon when I was a child, and I saw it capture prey in vase
like folds along the stalk. Some plants adapt to coexist with pollinators like bats,
insects and birds to help transfer pollen to ensure that the plants are
pollinated.
Some plants use defense mechanisms that poison, drown or trap
predators like caterpillars and insects. Milkweed creates a unique defense
mechanism that uses a sticky substance to drown and trap monarch caterpillars
so only 1/3 of caterpillars make it past the first day. Caterpillars that live
carefully cut off the main veins supply of latex to the leaf so they can eat
without being harmed. The Heliconia has bright red leaves with tiny flowers on
them. It guards nectar and the purple -throated harib hummingbird is the only
bird that can get at it. The plant rations it, and forces the bird to make
multiple visits to multiple flowers which it will force the bird to defend from
predators as well as be a pollinator.
Some plants find neat ways to transfer
seeds, such as the Brunzigia, which creates a flower stalk that when tried will
roll across the windy landscape when pushed by the air, widely dispersing the
seeds. Some plants give their seeds wings. Some defend themselves from weather conditions
(and sometimes predators) with resins and the shapes of their leaves. Mangroves
find ways to survive in high levels of salt water by using specialized roots
with pores that help to provde the plant with respiration and filter salt.
Extra salt is released by leaves which help to contribute to the ocean
ecosystem as a food source. To react to seasons, broad plants develop leaves
that shed in autumn, and pine trees develop antifreeze in their waxy needles.
Works Cited
Attenborough, David, W.W., D.D.
December 2009. Plants. In P. Spillenger, Paul. Life.
Britain: British Broadcasting Corporation.
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