<< Previous Next >>

Patterns on the Tree Trunk !

Patterns on the Tree Trunk !
Photo Information
Copyright: Subhash Ranjan (sranjan) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 489 W: 63 N: 1877] (5784)
Genre: Plants
Medium: Color
Date Taken: 2008-12-08
Categories: Rain Forest
Camera: Olympus Sp 510uz
Photo Version: Original Version
Theme(s): TreeBark [view contributor(s)]
Date Submitted: 2009-01-01 4:06
Viewed: 4363
Points: 10
[Note Guidelines] Photographer's Note
Thank you Ivan for correct ID.

Sieve patterns on the wood created by shipworms are often seen on the beaches of Andaman. These trunks become an excellent drift wood after maturing & carving by the sea waves.

PS: I have modified my note after Ivan's critique.
Shipworms are not worms at all, but rather a group of unusual saltwater clams with very reduced shells, notorious for boring into (and eventually destroying) wooden structures that are immersed in sea water, such as piers, docks and wooden ships. Sometimes called "termites of the sea", they are marine bivalve molluscs (Eulamellibranchiata) in the family Teredinidae, also often known as Teredo Worms.

When boring into submerged wood, bacteria in a special organ called the gland of Deshayes allows them to digest cellulose. The excavated burrow is usually lined with a calcareous tube. Shipworms have slender worm-like forms, but nonetheless possess the characteristic structures of bivalves. The valves of the shell of shipworms are small separate parts located at the anterior end of the worm, used for excavating the burrow.

The shipworms belong to several genera, of which Teredo is the most commonly mentioned. The best known species is Teredo navalis. Historically, Teredo concentrations in the Caribbean Sea have been substantially higher than in most other salt water bodies.

Shipworms greatly damage wooden hulls and marine piling, and have been the subject of much study to find methods to avoid their attacks. These organisms are referenced in the article about copper, for the use of copper sheathing on wooden ships during the Age of Exploration, as a method of preventing damage by "teredo worms". Christopher Columbus's ships were among the earliest known to employ this defense.


loot, CeltickRanger, eqshannon, valy67 has marked this note useful
Only registered TrekNature members may rate photo notes.
Add Critique [Critiquing Guidelines] 
Only registered TrekNature members may write critiques.
ThreadThread Starter Messages Updated
To Argus: Hellosranjan 1 01-18 06:56
To loot: Hellosranjan 1 01-02 17:40
You must be logged in to start a discussion.

Critiques [Translate]

Hello Subhash,

Happy New Year!!

Nice patterns in nature,these beetles must be real artists.This looks like coded message from them.tfs

  • Great 
  • loot Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5524 W: 722 N: 4163] (11276)
  • [2009-01-01 9:25]
  • [+]

Hi Subhash

This is not something often seen on TrekNature,
but nevertheless it is nature and deserves it place here on the site.
While we might cherish the sight of the beautiful Asian long-horned beetle
I am sure this tree (if it had thoughts and the ability to communicate)
would definitely ask for some assistance in defence against its mortal attacker.

My best wishes to you and your loved ones for a fabulous 2009.

Well done and TFS

hello Subhash

your tree trunk patterns it is giving
the impression o a leopard patterns,
excellent shot with beautiful luminosity
and great details of the patterns, TFS


So few enjoy this kind of image...as you can see I have put it into a theme of which I have great love....the barks and patterns in trees...hard for many to understand why.....but it is so important..or perhaps it would be jusrt gifted to be able as you and I...the patterns in the smallest of things and to bring them to attention...I hope generations will live to see what you have done...

Hello Subhash !
Those worms are true artists, they are digging out such beautiful patterns on the wood ! We do not often see things like that on TN, and I see that only few people know how to appreciate it, but I am among them, because I love nature in all its forms, not only beautiful birds or colorful butterflies. This belongs to TN also. Thanks for showing us this !

  • Great 
  • Argus Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5038 W: 260 N: 15594] (50626)
  • [2009-01-18 6:30]
  • [+]

Hello Subhash,
Going through your gallery I regret that I missed this one.
The density of the bore holes suggest that they are not caused by a longhorn beetle. They are more typical of a Shipworm, a type of mollusc with minimal shell that bores into wood. They belong to the mollusc family Teredinidae and the most common and widely distributed is Teredo navalis.
They caused extensive damage in wooden ships and before the advent of steel hulls were the reason for covering the bottoms of old sailing ships with copper plate.
An excellent sharp image of this shipworm-damaged log and fine contribution to TN!
TFS and best wishes,

Calibration Check