Do trees in rainforests have seasonal growth rings?

Friday 5th February 2010
Submitted by Guest
Steve Collins, Northampton

Tropical rainforests don’t experience the winter and summer extremes seen in temperate rainforests. Often, tropical trees grow in a similar way all year round, meaning growth rings are not apparent. However, tropical regions do experience seasonal changes, such as rainy versus dry seasons. Some tropical trees, like teak, have obvious growth rings that reflect this. Others have more subtle rings, revealed only by chemical analysis of the wood.
Answered by Yan Wong

How do hubless wheels work?
previous qanda Article
Why are British mains plugs bigger than those in other countries?
next qanda Article
Q&A Tabs

Viagra is the brand name for sildenafil citrate, a drug that was originally studied for use in patients with high blood pressure or heart disease. It works by blocking the action of an enzyme...

The powder is actually tiny scales made from modified hairs. Moths, like butterflies, belong to the order Lepidoptera, which means 'scale wing'. The scales are pigmented but they also contribute...

So that we can scrunch our hands into a fist, or other complex shapes, without excessive stretching or leaving bags of loose skin – think about how much movement occurs when you’re...

Tired eyes get dry, and rubbing stimulates the lacrimal glands to produce more fluid. Tiredness also closes your eyes, so you may rub to keep them open. Finally, there’s a connection between...

It’s not just humans that enjoy a smooch; lots of animals have courtship behaviours involving the mouth. Pigeons touch beaks, cats and dogs nuzzle each other, male fruit flies lick the...

All female mammals have a clitoris, the sole purpose of which is to react to sexual stimulation, and presumably this stimulation has evolved to be pleasurable for most species. But establishing...

To create a sound, we have to set matter - whether it's a gas like air, a liquid or even a solid material - in regular motion, creating a wave of specific frequencies, which we hear as a sound of...

Mirrors don’t reverse left and right either – that’s just our interpretation of what happens. Your reflection in the mirror is actually reversed front to back – if you have...

Discovered by an American student named Gary Flandro in the mid-1960s, the slingshot manoeuvre usually involves spacecraft briefly 'coat-tailing' a planet orbiting the Sun, extracting some of the...

The ice disappears because the wind blows away water molecules that have evaporated or 'sublimed' from the ice, so the ice slowly shrinks in size. The molecules that escape are those with the...