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Every fortnight we feature a seagrass meadow from around the world. This week, Elizabeth ‘Z’ Lacey writes about Akumal Bay, an ecosystem in the Caribbean off the coast of Mexico. Z is finishing her Ph.D. at Florida International University in Miami, Florida.
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Photos and text by Z Lacey

I have a confession.  I did not go to Akumal Bay to study the seagrass beds; I went to study the coral reefs.  Before you kick me off the World Seagrass Association blog, hear me out.  I first came to Akumal Bay, Quintana Roo, Mexico to study the return of an important herbivore to the coral reef community BUT I was quickly and irreversibly intrigued by the seagrass beds and the graceful green sea turtles in short order.  Does that redeem me in your eyes, fellow seagrass lovers?

A typical weekend in Akumal Bay: lots of tourists and fishing boats!

But I get ahead of myself.  Let me introduce you to a beautiful place that I’ve been working in for the past four years.  Akumal Bay is located along the MesoAmerican Reef on the Yucatan Peninsula of Mexico and its name means ‘place of the turtles’ in Mayan.  It is a unique environment as it’s one of the few public access beaches for locals as well as serves the surrounding tourist populations coming from Playa del Carmen, Tulum and Cancun.  There are lots of interested stakeholders, which is a challenge for the managers of this important ecosystem.  Incredibly this bay is monitored by the non-governmental organization Centro Ecologico Akumal (www.ceakumal.org) and Director Paul Sanchez-Navarro.  They rely heavily on donations and volunteer stewards to monitor the coral reefs, water quality and abundant turtle population.  To do this they hold turtle walks, give informative lectures in the education center, run a recycling program, provide life jackets/snorkeling vests and many other initiatives, all free of charge to visitors and the residents of the nearby pueblos.

Lush T. testudinum, S. filiforme and H. wrightii bed

A patch of seagrass dominated by the calcareous green algae, Halimeda

Unlike Siti’s last post on the diversity of species to be found in South Sulawesi, the seagrass meadows in Akumal typically consist of just three seagrasses: Thalassia testudinum, Syringodium filiforme and sparse Halodule wrightii intermixed with calcareous green macroalgae.  The seagrass beds are patchy throughout the lagoon from the shoreline to the reef approximately 250 meters offshore.  In some areas of the bay, patch reefs are interspersed throughout the seagrass meadow, providing refuge for fish, urchins and other diverse marine life.

A green sea turtle Chelonia mydas: caught in the act!

A southern stingray Dasyatis americana taking flight over a bed of S. filiforme

Akumal Bay is easily accessible by tourists groups from land as well as those entering on boats via the channel through the adjacent barrier reef.  Part of my research is considering this impact by humans on the seagrass beds and how the herbivores, both sea turtles and fish, have shaped this ecosystem.  Similar to other regions along the Mayan Riviera, this area is experiencing dramatic population growth and even further tourism development.  While the fate of these seagrass beds is unknown, change is inevitable.  CEA is in a difficult position as they try to protect the ecosystem with their limited financial resources while also listening to the needs of the local residents, tour operators and businesses, which rely on the bay mainly for tourism income rather than as a food source.

Yvonne, a volunteer seagrass ranger, harvesting some samples

Volunteers come from all around the world for a three month adventure at CEA and learn skills such as coral reef identification and sea turtle tracking.  Throughout the years I’ve had volunteers from France, Netherlands, Germany, the Philippines and of course Mexico as they assist in my research along with their other volunteer duties.  For some, such as my new friend Yvonne Kleinschmidt pictured here, they were completely unaware of the different types of seagrass before I took them into the field to make them honorary seagrass rangers.  It’s been fun for me to teach workshops on identifying seagrass and macroalgae to the volunteers as part of their reef monitoring training.

 

Hiking to the top of Coba, one of the many Mayan ruins in the region

Before you think it’s all work and no play in Akumal, I have to mention the many Mayan ruins to explore, cenotes to swim in and cities like Playa del Carmen to visit!  Not to mention the amazing local cuisine and fresh fruits and veggies available at the farmer’s market in the town square.  A day off from the field is rich in cultural experiences as well as ecological discovery – another reason I’ve come back to Akumal year after year.  And while I initially studied the coral reefs, you can see how the interesting marine life living within the seagrass beds and the stories waiting to be explored were able to pull me into Akumal Bay!

 

Every fortnight we feature a seagrass meadow from around the world. This week, I thought I’d take a stab at writing about a recent trip I made to a seagrass meadow on a sand cay called Barang Lompo in South Sulawesi.

By Siti M. Yaakub (text) & Marjolijn Christianen (photos)

The Spermonde Archipelago is the stuff of seagrass legends. I say this because I’ve heard it talked about A LOT. The area has had a long succession of seagrass researchers (mostly Dutch) conducting their studies in the area. So when I got to tag along with Marjolijn (Mayo) and her two masters students Peter and Iris to visit some seagrasses off Makassar in South Sulawesi, I was pretty darn excited. We set off early from the hotel and after haggling for a boat, we set off for Barang Lompo, which is a coral island just north west of the town of Ujung Pandang in Makassar. In just under an hour (which is pretty impressive for our tiny vessel) we were there.

Location of Barang Lompo off the coast of Makassar. (Maps courtesy of Google Earth)

You know that feeling you get when you come across a seagrass meadow you haven’t been to before? You’re peering into the water, and you’re met with a carpet of awesome green, your heart leaps and you get tingles down your spine in anticipation of what you might find, and all you wanna do is jump right in and swim around like a crazed person checking off the number of species of seagrass you can find? That’s pretty much what happened.

The meadow didn’t disappoint, we spent a very happy hour or so exploring, ID-ing seagrass and checking out the cool critters going about their daily business.

Peter, Iris and I compaing notes on species we've found.

 

The meadow was predominantly Enhalus acoroides, Halodule uninervis and Thalassia hemprichii with lots of Halophila ovalis in between.

 

It was knobbly sea star heaven

Is that a Halodule leaf the knobbly sea star is munching on?

A friendly fisherman came to sell us his catch of the day

A habitat for juvenile fish indeed!

Lobster mounds

Urchins of all sorts were very common throughout the seagrass bed

After an hour or so of swimming, we were getting hungry, so we got back onto the boat and headed to a nearby island called Bono Batang to grab some lunch. Mayo was hoping to catch a glimpse of some turtles, but the tide was pretty low so chances of finding grazing turtles in the seagrass is pretty low.

When we got to the island, there was some excitement at the jetty. A couple of local boys had spotted a very large puffer fish in the seagrass surrounding the jetty and were taking turns diving in after it.

Boys and the lone (and probably lost) puffer fish

After lunch, we took a short stroll to a shop near the jetty, which turned out to be a souvenir shop – selling stuff collected from the sea. We had a quick chat with the owner and Mayo asked him about the occurrence of green turtles in the area, turns out there haven’t been green turtle sightings in decades! Lots of Hawksbills but no Greens 🙁

Mayo having a chat with the shop owner. Above her hands the skeleton of a dugong and hanging on the pillar to her right is a preserved turtle that's for sale to tourists.

When asked about the turtles he has for sale, the owner said that they are no longer allowed to catch turtles in the waters around the area and that the existing stock he has in his shop are all from before the new law was passed. We also learned that turtle meat is sometimes used as filler in local dishes because it’s cheaper than beef.

A preserved and dried turtle hatchling

As we walked back to the jetty, we came across a rather disturbing sight. Marine rubbish was strewn everywhere along the shore. Turns out that there isn’t a proper waste disposal system on the island and it all goes into the sea. A sobering note to leave on, given that these islands are very densely populated. As we left you can actually see the impact marine litter is having on the seagrass beds just adjacent to the island. Will this be the fate of Barang Lompo as well?

Rubbish in the seagrass beds growing in the waters off the island.

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If you think that the SE Asian seagrass beds are over-represented on this blog, you’re absolutely right. I mean they’re awesome and all, but we are sorely lacking contributions from our North and South American, Mediterranean, African and Australian counterparts. I have to rely on YOU for these because much as I’d like to go around and snorkel/swim/dive/walk in all the seagrass beds in the world, I have supervisors to answer to and like most PhD students, a lack of funds. So please help me keep this blog alive and going! Send me your articles! The rest of the world, REPRESENT!! Love, Siti 🙂
Every fortnight we feature a seagrass meadow from around the world. This week, Jillian Ooi writes about Pulau Tinggi, an island off the east coast of Peninsular Malaysia. Jillian has just recently completed her PhD at the University of Western Australia in Perth and is now based at the University of Malaya, in Kuala Lumpur.When she’s not grass-watching, she plays the gamelan with Rhythm in Bronze, a gong chime ensemble in Malaysia.
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By Jillian Ooi
Photos courtesy of Affendi Yang Amri and Serina Rahman.

The first time I ventured into the seagrass meadows of Pulau Tinggi was in 2005. Back then, we were tracking the movement of dugongs in the area, but I became absolutely enchanted by the meadow itself.

It was like a magical garden filled with wonderful critters everywhere I looked. Golden sea cucumbers, knobbly sea stars, sea hares, green turtles, black tip sharks, and my favourite – the gobiid fishes and their associated burrowing shrimps, are some of the reasons I jumped at the chance of going back there for my PhD in seagrass biogeography three years later.

Pulau Tinggi is a marine park island located 12 km off the southeast coast of Peninsular Malaysia. In Malay, tinggi means ‘tall’. This island was named for its 600 m high peak shaped like a Mandarin’s hat. In olden days, Pulau Tinggi was a stopover point for spice traders. Today, it is sparsely inhabited and relatively undeveloped (i.e. no large luxury resorts as of 2010, although I hear plans are underway for some).

Pulau Tinggi, located off the southeast coast of Peninsular Malaysia, has a rich seagrass system in the forereef zone.

Our trusty boat, Gloria, skippered by Eddie, a local villager. In the background is the high peak of Pulau Tinggi.

Its villagers rely on home-stay programmes targeted mainly at recreational fishermen.  Its seagrass meadows are really something else. Mixed stands of Halophila ovalis, Halophila decipiens, Halophila minor, Halophila spinulosa, Halodule uninervis, Syringodium isoetifolium and Cymodocea serrulata grow in the area between the coral reef and sea. These forereef meadows are interesting because they comprise mainly small, fast-growing species growing in deeper waters and on unconsolidated sandy substrate. In most other Southeast Asian meadows, back reef meadows dominated by Enhalus acoroides and Thalassia hemprichii are the better known systems (Ooi et al 2011, Estuarine, Coastal and Shelf Science).

Cuttlefish found in seagrass meadows of Pulau Tinggi

 

Gobiid fish and burrowing shrimps

We found numerous dugong feeding trails, and frequently sighted dugongs surfacing around our boat. As a result, colleagues working on the Dugong dugon are now starting to turn their attention towards the Pulau Tinggi group of islands. Burrowing shrimp mounds are also common, and I was finding new mounds created almost daily in my study plots. Does this type of small-scale sediment burial kill the seagrasses? Yes it does, if a mound stays intact for at least 4 weeks. However, burial has more of an effect on small and ‘selfish’ species such as Halophila ovalis and Halodule uninervis (Ooi et al 2011, Continental Shelf Research). In comparison, larger species such as Cymodocea serrulata and Syringodium isoetifolium appear to survive burial better because they transfer resources to buried shoots.

 

So far, the main seagrass meadows on the south-western side of Pulau Tinggi have been mapped using tow underwater video in 2009. Plans are in place to set up permanent monitoring sites in the coral reefs and seagrass meadows to collect long-term data. Together with collaborators at the University of Western Australia, we are also continuing to develop models to understand the distribution patterns of the main seagrass species in relation to sediment properties.

The underwater world is not the only reason for my fond memories of Pulau Tinggi. We lodged with a local family who took us out to sea, filled our dive tanks, let us watch the World Cup on their TV, and welcomed us at a family member’s wedding.

Research facilities were basic, but I managed by converting the family’s grocery shop into a makeshift lab. The matriarch, Maksu, kept our spirits up by plying us with freshly-caught fish and sambal belachan, chilli donuts, fried bananas, fresh coconut juice, pressed rice topped with a thick chilli peanut sauce, durian porridge, and keropok lekor (something like a fish sausage is how I would describe it). On days off, we’d trek to our private waterfall to soothe our aching muscles and visit the resident Malayan soft-shelled turtle there.

But what does the future hold for the seagrasses in Pulau Tinggi? There are plans for a luxury resort, a jetty, and a kelong (a traditional fishing platform on stilts) in the vicinity of the meadow I studied. Thus, changes are inevitable. As development extends gradually across Pulau Tinggi and its surrounding islands, anthropogenic impacts on seagrasses will become evident. For this reason, it is important that our work here continues.

On days off, we trekked up the hill to our own private waterfall and pool.

What a great start to 2012! Joel Creed has posted the announcement for the 10th ISBW to be held in Rio de Janeiro in November 2012. Read on for more details and don’t forget to register your interest with the email below or on the ISBW10 Facebook page!

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Dear colleagues,

Apologies for cross posting.

The State University of Rio de Janeiro and the Institute for Brazilian
Marine Biodiversity will be hosting the Tenth International Seagrass
Biology Workshop from 25-30 November 2012 at the Pontal da Ferradura
Convention Centre in Búzios, Rio de Janeiro, Brazil.

With the emphasis on providing an agreeable and comfortable environment to
talk serious seagrass science the workshop will be organized into:

Plenary lectures from invited speakers

Oral and poster presentations addressing specific topics within major themes

Half-day study groups, which will consist of multi-disciplinary team
activities focused on cutting-edge global and regional issues in seagrass
research, methods, conservation, reviews and habitat health

Fieldtrip to local seagrass habitats

Organizers will invite a select group of speakers and devise creative ways
to facilitate discussion. During interactive themed sessions and study
groups we will encourage participants to go beyond one-way communication.

The Workshop will open on 25th November with an evening reception at the
Pontal da Ferradura Convention Centre in Búzios. The event will close on
the evening of 29th November with a final reception.

The International Seagrass Biology Workshops have been held since 1993 when
the first meeting took place in Kominato, Japan. The International Seagrass
Biology Workshop (ISBW) is an official activity of the World Seagrass
Association Inc.

Don’t miss the opportunity to be a part of the next International Seagrass
Biology Workshop!

Please register your interest by replying to
isbw10@biodiversidademarinha.org.br or on Facebook (isbw10) for further
announcements and updates.

A website with more info will be available soon.

Local Organizing Committee

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More details:

ISBW10 on Facebook: https://www.facebook.com/pages/Isbw10/184950924937571?sk=wall

WSA 2012 Seagrass Calendar

Alert, the WSA 2012 seagrass calendar is out!

12 seagrass genera for 12 months, keeping us informed on when each genera was first described and how old they are getting.

The calendar is available in PDF and can be easily printed in colour of B&W, in A4 format, easy to store and travel with.

The “making” of the calendar was a great way to connect people and to share photos across the world.

Thank you to those of you who donated photos to us and to Jane Thomas for putting it together.

Enjoy!

Download the calendar here or get the A4 version

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