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Possible zoophilous pollination of turtlegrass by marine invertebrates

By Brigit van Tussenbroek

Small invertebrates play a central role in seagrass communities as controllers of epiphyton and conduits for energy transfer from primary producers to higher trophic levels. Van Tussenbroek and collaborators at the National Autonomous University of Mexico, highlight a new interaction between meso-grazers and seagrasses by describing the foraging of invertebrates on the pollen/mucilage masses of the seagrass Thalassia testudinum during the night.

Male turtlegrass flower with invertebrate.

The fauna visiting the flowers was highly diverse 252 specimens belonging to 37 families and 57 species of crustaceans (Classes Maxillopoda, Ostracoda and Malacostraca) were found on 76 flowers, and 15 species were new records for the region. Annelids (mainly polychaetes) were less abundant (60 specimens) and diversified (13 species) and they exhibited no obvious differences in their visits to flowers with or without pollen. Negative consequences for reproductive success of the seagrass of the consumption of pollen by the invertebrates were most likely insignificant, because the quantities of removed pollen were very small. However, these invertebrates may serve as pollinators of T. testudinum, which if confirmed, makes this observation the first record of animal-pollination in the marine environment.

Check out the YouTube video

Find the paper in MEPS

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Conferences & Workshops

10th ISBW – Fieldtrip and Wrap up

It’s been almost two weeks since the end of the 10th International Seagrass Biology Workshop in Búzios, Brazil and I’ve decided to do a blog post before the memories get too fuzzy. Here’s a re-cap of what we did the last three days of the conference:

Day 3: Geting into the swing of things
We started the morning with the third plenary speaker for the Worshop, Sophie Arnoud-Haund who gave us a round-up of the state of seagrass genetics and clonality. She offered insights into clonality and how it affects conservation of seagrass meadows. This was followed by a second day of 10-minute talks with the theme of .
In the afternoon we had two workshop sessions – mapping and ecosystem services. The workshop on mapping discussed and listed the various methods used by researchers and the challenges faced when mapping seagrass – and we learnt of some pretty creative methods used for mapping and detecting seagrass like for example, strapping a camera on the back of a manatee! The second workshop was on seagrass ecosystem services which really got us thinking about the value of seagrasses and the services they provide as it required listing the services of seagrass by genera.

Day 4: Field trip Day & Poster Session
We went out to hunt seagrass on Day 4 and we were brought to a meadow of Halodule wrightii seagrass. When we got to the site, it was windy and threatening to rain, but some of us decided to brave the cold and jump right in. This enthusiasm was perhaps fueled by rumours of a seeker’s prize for the first person to find Ruppia maritima in the meadow, but despite our best efforts, I don’t think anyone managed to find it. Just as we were wrapping up, the sun came out and the weather became more of what we had hoped for for a field trip day.

We also had an evening poster session, with some very simulating discussion aided by a large spread of yummy cheeses and wine 🙂

Day 5: Wrap up and dinner!
Gary Kendrick gave the last plenary of the ISBW and gave us an overview of seagrass dispersal and connectivity. After the last session of talks and workshop, we were rewarded with a conference dinner – a buffet style affair which everyone enjoyed. The student presentation and poster awards were also given out to the top 4 oral and best poster presentation.

And that concluded ISBW10 – there were some bleary-eyed farewells the next morning but in all everyone agreed that it was a successful workshop. Congratulations to Joel Creed and his team for a wonderful job done. See you guys in China in 2014! 🙂

 

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Election for WSA Executive (2012)

Dear WSA members,

The period for nomination for the next WSA Executive was extended, and closed on the 5 December, 2012.

The positions of Vice-President, Treasurer and Secretary are uncontested with single nominees for each position. The nominations received are as follows:

Vice-President: Richard Unsworth
Nominator: Len McKenzie
Seconder: Giuseppe Di Carlo

Treasurer: Jessie Jarvis
Nominator: Giuseppe Di Carlo
Seconder: Len McKenzie

Secretary: Len McKenzie
Nominator: Rob Coles
Seconder: Rudi Yoshida

There are two nominees for President so this position will be decided by a vote:

Nomination 1

Giuseppe Di Carlo
Nominator: Len McKenzie
Seconder: Richard Unsworth

Nomination 2

Mike van Keulen
Nominator: Anitra Thorhaug
Seconder: Evamaria Koch

Voting is now open but will close on the 19 December, 2012 — so please do not delay in submitting your ballot. Please note that only current financial members of the WSA are allowed to participate in this vote. Members have been emailed directly with instructions on how to cast their ballot, if you have not received instructions about voting please contact the WSA Secretary ASAP < wsa.secretary@gmail.com >.