Last Seagrass Monitoring!

13 02 2009

Hello all!

We went down on 10th February to do our last official monitoring session at Labrador Park! We took more photos this time for our Research Studies presentation in April 😀

Compared to our last few trips, however, we have very bad news! The seagrass meadow, especially the Thalassia Hemprichii that is closer to the shore were almost completely black and rough with white patches, we have no idea why that is the case. And so, we took a few leaves with us and we’ll be observing them next Tuesday during our RS block, so look out for results!

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We saw this green fish swimming around the meadow too! It was trying to burrow a hole and we could not take a picture of it because when it was really swift in its movements and sand was being kicked up as it was burrowing furiously! That made us very sad because we wanted to share our find with all of you!

Other finds include a snapping shrimp,

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barnacles which were interesting to us as usually we only see white or grey ones

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and a snail that came out of its shell to explore!

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There is also less algae this time round and we hope the seagrass will grow better because of that! In addition, we hope the seagrass will not die because of the shocking amount of epiphyte cover (:

This would be our last official post as a RS group, thank you to all those who have helped in one way or another! 😀 We might still update this blog during the time period from now till our juniors take over as we have decided to take it up as a Service Learning project as well, so hang on for more updates!

Cheryl Jiemin Joyce!





First 09 Monitoring

27 01 2009

Hello! It has been almost 3 months since we last went down to Labrador Park for our seagrass monitoring and data collection. After not being on the beach and seeing all the sea grasses for such a long time, we felt almost glad to be back there on the 9th of January despite the drizzle. However, due to the slight inaccuracy of the tide table, the tide was simply too high for us to do any monitoring at that specific time. Nevertheless, we stationed ourselves and waited for more than an hour. Unfortunately, not only did the tide not recede, in grew even higher. Left with no choice, we had to go home): (However, one positive takeaway from the trip was doing some coastal clean up! While we waited for the tide to recede, we went around the beach trying to pick up litter! The beach was really quite dirty!)

Our next attempt down to the park was on 12th January. The tide table that we used proved to be really inaccurate as the tide was quite high at our targeted time again. However after a long wait, we were able to conduct our monitoring although the tide was a little too high for our liking (it got our clothes wet D: )

Remember that we were supposed to measure the growth rate of our selected seagrass, Thalassia Hemprichii? We would select a 25cm by 25cm plot of Thalassia Hemprichii, then poke holes at the bottom of the seagrass, thread a piece of fishing line through the hole and leave the seagrass to grow. Then we would come back 3-4 days later, cut away the seagrass and measure its growth from the new base of the grass to the hole with fishing string. Our initial plan was to start another plot to measure its growth. However, since the tide was too high on the 9th and we could not do anything, we could no longer start any plot for January as the only 2 days where the tide is low at an appropriate time was the 9th and 12th.

Therefore, we took the soil and water sample from our plots as well as monitor the seagrass coverage of our other 3 plots! The soil and water sample will be studied further as a factor of the seagrass growth. (We will keep you guys updated!)

Yep, so that concludes our first successful trip down to Labrador Park in 2009. We are very sorry we do not have photos this time round due to the unfortunate and unexpected illness of our photographer thus we do not have a camera on that day D: we will take more photos during our next trip, which is hopefully in mid February.

Danielle, Jolyn and Xinyi





First seagrass monitoring of 2009

19 01 2009

Last Monday, 12 January, we went down to Labrador Park again as the tide was supposed to be low. However when we arrived, the tide was still quite high although we went there according to the time in the tide table. We then decided to wait as the tide was expected to recede. After about an hour, the tide was finally low enough for us to see the seagrass, and so we started our monitoring (:

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Like 3 days before when we went down, there were a lot of algae! Some were washed up onto the shore while a large amount of algae was left resting on the seagrass patch and covering the seagrass after the tide has receded. When we took one look across, algae seemed to be like all there was. However, when we moved the algae out of the way, we realized there were actually still much seagrass beneath them!

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In fact, the seagrass seemed to be exceptionally green as well! However, there was of course still some seagrass with epiphyte on them , just that seagrass without epiphyte on them really were green. The seagrass somehow seemed to be longer as well!

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We also saw many different kinds of algae. One of which was Neomeris

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Another was Sargassum

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There was also Gracilaria edulis

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We finished at around 7, and we managed to catch a glimpse of the beautiful sunset (: The sunrays against the blue sky are simply beautiful!

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Such is the beauty of nature, and of course, Labrador Park (:

Cheryl Jiemin Joyce 😀





Failed Seagrass Expedition! ):

18 01 2009

Hello all (: It’s been a long time since we went to our favourite park, Labrador Park!

This time, however, we did not manage to monitor seagrass due to the tide which was too high and also the water was rather muddy so we could not see anything. What we could see was lots and lots of green algae washed onto the shore and floating on the sea surface as well, making the beach looked terribly dirty D:

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There is also some construction nearby, hopefully they would not disturb the seagrasses and the sea’s ecosystem!

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Since we did not manage to monitor, we decided to make our time there worthwhile by exploring the shore and picking up rubbish on the way!

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There were a lot of rubbish, and common items include pieces of wires, glass shards, glass bottles and plastics.

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Some interesting sights include a snail inhabiting inside some junk.

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We hope that people will stop littering at the beaches because they are dangerous to both people and animals, please be considerate and throw the rubbish to the place where they belong, which means into the rubbish bin! Please be considerate:D

And that was the end of the failed expedition, but look out for the next post because we went back again two days after(:

Cheryl Jiemin Joyce! 😀

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Clean & Green Singapore!

7 11 2008

The weekend was well spent at the clean and green Singapore (CGS) carnival over at the marina barrage, a newly-opened dam that marks Singapore’s first city reservoir.

We had a good view of the city and Singapore flyer from the marina barrage. The scenery was simply spectacular! (:

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While walking around the marina barrage, viewing other exhibits from the other schools and admiring the beautiful scenery. There was actually free kayaking and aqua-biking. For the not so adventurous ones, there was the water taxi. We did not actually have the chance to do any of that.

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We had a booth of our own, shared with another project about banded leaf monkeys from our school.

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Our poster, together with the other posters kindly provided by team seagrass, was put up.

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We even had official tags and the great meals provided for us. There was even breakfast and tea! 😀 Ms. Siti and Ms. Weiling also got us some snacks!

 

On the first day (Friday), we were indeed honoured to have PM Lee visit our booth and hear a short intro of our project from us!

 

Although we encountered some problems along the way, like explaining our project in mandarin, we slowly got more experienced and better in conversing with the public. Moreover, sometimes all the aunties and uncles only wanted freebies and we had to control the giving out of free stickers, colouring sheets and masks.

 

Rain poured on Sunday but that didn’t dampen the atmosphere as the public continued flowing into the marina barrage. There was actually a great crowd for all three days as shuttle buses were filled up and RC groups made up the crowd.

 

Although it has been tiring, we all felt that it was worth it. We hope that the public has learnt more about seagrass:D

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Cheryl Jiemin Joyce Xinyi Jolyn Danielle





161008 Seagrass Monitoring

21 10 2008

Hello, we’re back from those terrible exams to bring you updates on our project! We went to Labrador Park at 5.30pm on the 16th of October to monitor our seagrasses there again, along with Ms. Siti from National Parks! It was drizzling slightly so we wore bright red ponchos and used waterproof papers to do our task!

 

We were surprised to find more algae than usual in the seagrass patch. Ms. Siti explained that it was probably the blooming season for the algae and thus its abundance. They grew practically everywhere and hid the seagrasses D:

 

 

 

We are also now clearer about the difference between mud and fine sad, thanks to Ms. Siti! She pointed out that if the substrate is fine sand, we will still be able to feel the tiny grains when we rub our fingers together, but as for mud, it’s lumpy and we will not be able to feel the distinct grains. here are photos we took of various substrates!

 

 

Shell!

 

 

Fine sand!

 

 

 

Mud!

 

 

The colour is practically the same and may be deceiving but the feel of each substrate really is different!

 

We also noticed a couple having their wedding photos taken at Labrador Park! Must be because of the beautiful scenery there(:

 

 

 

Our team is also recently preparing for our booth at Clean and Green Week, otherwise known as Clean and Green Singapore 2008 (CGS 2008)! You can come down to visit the booths related to CGS to learn more on the environment how you can do your part! We’ll be over at the marina barrage from the 31st Oct (Friday) to 2nd Nov (Sunday)! Do come and support us! (:

 

Cheryl Joyce Jiemin





Enhalus acoroides

14 10 2008

Enhalus acoroides

 

Category of Organisms

Seagrasses

Kingdom

Plantae

Phylum/Division

Magnoliophyta

Class

Liliopsida

Order

Hydrocharitales

Family

Hydrocharitaceae

Genus

Enhalus

Species

acoroides 

Binomial Name

Enhalus acoroides

 

Appearance: The leaves are very long and ribbon-like (30-150cm long, approximately 1-2cm wide) with many parallel veins and air spaces, generally dark green in colour and thick. The inrolled leaf margins make the leaves tough (hard to tear)

 

Distribution: Widely distributed in the tropical parts of the Indian Ocean and the Western Pacific and are very common in the Indo-Malay Archipelago and in the Philippines

 

Environment/habitat: Common in shallow intertidal areas with sandy and muddy substrata, but can extend down to 4m depth

 

Rhizome: Has thick rhizomes (underground stems) that are massive (1.5 cm in diameter), branching monopodially when a new shoot is formed. The rhizomes are densely covered with long black fibrous bristles which are the remnants of a leaf sheath. They have coarse, cord-like and hairless roots which have wide air-channels. The roots are 10-30cm long and 3-5mm thick arising from the axillary buds of the ventral leaves.

 

Propagule dispersal: The fruits are round and large (4-6cm in diameter) with dark, ribbed skin and 6-7 white seeds. When the ripe fruit bursts, the seeds are released and float for only about 5 hours before they start to sink. The seeds are estimated to be able to travel 42 km.  When the seeds settle, roots develop rapidly and the seeds germinate quickly. Enhalus acoroides spreads mostly by vegetative reproduction.

 

Reproduction: Flowers only in habitats where the flowers are exposed at low tides because this species undergoes aerial surface pollination. The seed upon liberation from the fruit germinates immediately after it sinks to the muddy bottom. Enhalus acoroides has white flowers- male flowers are tiny while female flowers are larger. The male Enhalus acoroides bears a single pedunculate inflorescence containing numerous flowers whilte the female Enhalus acoroides bear single uniflorous inflorescences. Flowering is more or less continuous over the year, and represents the investment of around 20% of above-ground production

 

Importance/Value: Enhalus with long strap-like leaves form good wave breakers and extensive beds give some protection to shorelines exposed to strong waves. Such thick vegetation also provides good hiding places for small species and the young of other organisms. It is a common food for the dugong. Tiny algae often grows on the leaves of this seagrass, providing food for grazing creatures such as snails. The fruits are sold as human food in the market and the seeds are eaten raw by coastal dwellers. Enhalus is highly productive and contribute greatly to oxygenation of the seas as well as carbon sequestration, leading to reduction in the effects of global warming.