> Hi Rodolfo,
>> Fascinating! Can you tell us a bit more about these reefs? When did they
> form and how long have they persisted? I've been studying beds formed by
> Boccardia proboscidea and Dipolydora sp. in Bodega Harbor (Central
> California). Densities are in the tens of thousands per m2, which is much
> less dense than you find. They form patches of dense tubes and mucky
> sediment rather than reefs. The patches are adjacent to areas with almost no
> spionids and high densities of phoronids. I've been studying the ecology of
> these patches, including why the patches persist over multiple generations
> adjacent to a very different community type. There are similar patches of
> Boccardia proboscidea in other NE Pacific locations and SE Australia near a
> sewage outfall as well as records of other bed-forming spionids.
>> Here are the references I have for Boccardia proboscidea in Australia
> (where it is invasive):
>> Dorsey, J. 1982. "Intertidal community offshore from the Werribee
> sewage-treatment farm: an opportunistic infaunal assemblage." *Australian
> Journal of Marine and Freshwater Research* *33*: 45-54.
>>>> Hayes, K., C. Sliwa, S. Migus, F. McEnnulty, P. Dunstan. 2004. "National
> priority pests." *CSIRO Marine Research Report.*
>>>> Newall, B., R. Molloy, et al. 1999. Environmental impact assesment and
> review of effluent disposal options for Eastern Treatment Plant. Wembley,
> Australia, CSIRO.
>> I have a few more references for other occurrences of spionid beds that I
> can send when I return home next week.
>> Cheers,
>> Christy Bowles
>> --
> Christy Bowles
>> PhD Candidate
> Bodega Marine Lab and Graduate Group in Ecology
> University of California, Davis
>http://www.des.ucdavis.edu/faculty/grosholz/people/bowles.htm>cmbowles from ucdavis.edu>>>> On Wed, Dec 9, 2009 at 12:15 PM, Rodolfo Elias <roelias from mdp.edu.ar> wrote:
>>>>> Dear all
>> I want to know if some of you have some references about polychaetes
>> that build "reefs" in sewage-impacted areas.
>> >From spring 2008 the area around Mar del Plata's sewage discharges (SW
>> Atlantic) almost all intertidal areas are covered by sand-tubes of
>> Boccardia sp. (possibly a not described species), forming reef
>> structures. Density can reach 650,000 ind.m-2, and this reef can support
>> a person walking over. The reefs supports also all the autumn-winter
>> storms.
>> There are a student dealing with these (large number of) worms, and any
>> info will be welcome!
>>>> Hoping to see you in Lecce!
>> Wormly
>> Rodolfo Elias
>>>>>> _______________________________________________
>> Annelida mailing list
>> Post: Annelida from net.bio.net>> Help/archive: http://www.bio.net/biomail/listinfo/annelida>> Resources: http://www.annelida.net>>>>>>>>
--
Christy Bowles
Bodega Marine Lab
Graduate Group in Ecology
cmbowles from ucdavis.edu
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