Pages - Menu

Showing posts with label Pitcher Plants. Show all posts
Showing posts with label Pitcher Plants. Show all posts

Thursday, December 15, 2011

Borneo: Small wonders at every step

It's the little things that really matter in Borneo's lush, exotic and life-giving rainforests

When naturalist Mark Watson pursed his lips and pretended to kiss a beautiful - but carnivorous - pitcher plant, I could almost understand how he felt.

Pitcher plants, which lure insects with the promise of sweet nectar and then devour them, are certainly ... intriguing ... and the elegant red plant he was puckering up to was a particularly attractive one.

But perhaps more importantly, they're typical of the rich diversity of plant, fungus and insect life which makes a walk through the Borneo jungle such a fascinating experience.

The animals may be the stars of the show - the woop woops of gibbons from the treetops or signs of rooting by bearded pigs in the forest floor are always exciting - but, unless you're lucky, you probably won't see them.

What you will see, if you look carefully, are massive strangler figs looking poised to walk on their roots like Ents from The Lord of the Rings, or prettily patterned fungi creating works of art amid the leaf mould, or delicate orchids blooming colourfully in the gloom created by the thick canopy of leaves, or great armies of ants on the march along fallen branches.

During a cruise around Borneo on the expedition ship Orion II, we had the chance to explore several jungle national parks, all different and all fascinating.

At Tanjung Datu National Park, for instance, four of us wandered slowly along the Pasir Antu Laut Trail, managing to make its 2.7km last about 3.5 hours, pausing every few metres to admire some ornamental bracket fungus, a particularly twisty liana, a tall, thin tree supported by a massive set of buttress roots, or a butterfly with elegant black and white patterns on its wings.

There were certainly animals around. From time to time we heard monkey calls and the birdsong was superb. At one point I heard the beating of heavy wings overhead and caught a glimpse of the massive black shape of a hornbill. On another occasion I spied a small, dark brown squirrel poised unmoving on a branch above the path.

There were plenty of signs of pigs rooting and a group on another trail actually saw "a particularly ugly" Borneo bearded pig.

Down on the beach, which served as our return pathway, three sets of tracks showed where green turtles had come ashore to lay eggs during the night (the park staff dig the eggs up and rebury them in safe enclosures). In a cave at one end of the bay, dozens of tomb bats swooped around us while we explored its recesses.

But it was just as interesting to watch a route march of thousands of large, brown, ant-like creatures carrying white eggs - our guides later had an argument about whether they were termites or ants - a bright orange fungus glowing in the gloom, a magnificent yellow and black butterfly floating just under the leaf canopy, or one remaining flower from the night-blooming putat tree, whose glorious pink and white blossom produces a poison used to kill fish.

On the island of Pulau Tiga, we found the same incredible biodiversity ... plus mud. That was partly because of the heavy rain that fell as we landed from our zodiac, making the jungle track a bit slushy. But it was also because the island was formed by a volcanic eruption as recently as 1897 and there's still a sort of mud volcano in the jungle where crazy people like me can have a soak.

Continue reading (Incl. Pic) at: Borneo: Small wonders at every step
.
.

Tuesday, November 8, 2011

Small mammals use Borneo pitcher plant as toilet in exchange for nectar

Tree shrews and nocturnal rats in the forests of Borneo have a unique relationship with carnivorous pitcher plants. The mammals defecate, and the pitchers are happy to receive.

A study published on May 31 in the Journal of Tropical Ecology shows a species of giant mountain pitcher plants (Nepenthes rajah) supplements its diet with nitrogen from the feces of tree shrews (Tupaia montana) that forage in daylight and summit rats (Rattus baluensis) active at night. When the small mammals lick nectar from the underside of the pitcher’s lid, they stand directly over the jug-shaped pitcher organ.

The pitchers grow in nutrient-poor, acidic soils and require a supplemental source of nitrogen. Carnivorous plants usually digest bugs, grabbing nitrogen from protein. The Bornean pitchers consume nitrogen-rich feces.

Researchers have already documented tree shrews using two species of Nepenthes pitcher plants as toilets. A third species provides daytime roosts for Hardwicke’s woolly bats in exchange for guano.

However, this is the first instance of a carnivorous plant interacting with two different mammal species, and the first attempt to measure how the plants attract the dining and defecating animals.

“The fact that one of the mammals visits the pitchers during the day and the other one visits during the night indicates that this plant is involved in one of these mutualistic interactions around the clock, which is quite interesting,” said Charles Clarke, an ecologist at Monash University, Malaysia campus, who published a similar study at the same time, in an interview with mongabay.com.

Continue reading (Incl. Pics) at: Small mammals use Borneo pitcher plant as toilet in exchange for nectar
.
.

Wednesday, September 14, 2011

Free talk on Sarawak’s pitcher plants Sept 30

KUCHING: Sarawak Biodiversity Centre (SBC) will be organising a talk on pitcher plants entitled ‘Nepenthes of Sarawak’ on Sept 30.

The talk will be held at SBC’s lecture theatre, KM20, Jalan Borneo Heights, Semengoh, Kuching by Ch’ien C. Lee, a graduate of the University of California, Santa Cruz who has spent over 17 years studying pitcher plants.

Ch’ien is also a known wildlife photographer who believes that photography is an excellent method for conveying ideas andsharing experiences. Ch’ien has co-authored and contributed to several books including ‘A Pocket Guide to Pitcher Plants of Sarawak’ and ‘Pitcher Plants of Borneo (2nd edition)’.

He has also published works on several new species of Nepenthes, their biodiversity, ecological relationships, conservation and artificial propagation.

Ch’ien’s talk will focus on the diversity of pitcher plants or Nepenthes found in Sarawak and feature his beautiful photography of these interesting carnivorous plants.

To date, 25 species of Nepenthes have been described in Sarawak, of which seven are endemic to the state. In recent years, four new species have been described from collections made in the highlands of central and northern Sarawak.

Continue reading at: Free talk on Sarawak’s pitcher plants Sept 30
.
.

Infolinks