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News from Coquette Point

2/4/2012

 
Click on photos to enlarge
Hello from Coquette Point,

The Feast of the Senses festival was held last Sunday and amazingly the rain held off and the sun shone brightly until 3pm and then the skies opened. Kirsty Densmore, the event manager talked me into a breadfruit cooking demonstration. I did not know until I saw this photo that celebrity chef Peter Russell-Clark was looking over my shoulder as I cooked.
Sunday night 200mm of rain fell out of the sky and the Johnstone River ran red for as far as the eye could see.
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Small islands of grass floated down the river and caught the marker buoy on the Coquette Point rocks and shifted it 200metres. It is now held on a sandbank opposite the Coconuts.  At least this time the buoy is still on the right side of the river and is not a  hazard to shipping.

The hot humid weather has benefited the 4 o’clock moth’s pupa and they are now hatching into their spectacular adult form. They are hatching overnight and hang about all day to dry in the sun.
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Larva stage
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Dysphania fenestrata adult
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The male sunbirds have been singing their little hearts out for several week now, puffing out the feathers on their blue bibs, and the females have ignored them. This week the females allowed the male to approach and I believe courtship has begun. I will be looking out for the full male sunbird display dance and hope I can photograph it again this year.
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My neighbour Bill Farmsworth and I went for a walk around to the long beach on Thursday. Bill wanted to look at the mangrove dieback he felt it perhaps was not as bad as I made out. It was a hot sunny day and as we walked out onto the beach I was thrilled to see the matriarch cassowary ‘Jessie’ ahead in the mudflats. ‘Jessie’ did not notice us as she was concentrating on catching crabs.
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Although cassowaries feed chiefly on fruit they also eat crustaceans and fungi.  I took dozens of photos however I did not manage to catch one of ‘Jessie’ with a crab in her beak; she was too quick for me.
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 Bill and I stood absolutely still and ‘Jessie’ walked around us twice, her eyes searching for crabs and even when she noticed us she quickly resumed fishing; we did not move or speak. Suddenly she entered the mangrove forest and disappeared.  A wonderful experience all too quickly over.

Eastern curlews have returned and I saw eight birds on the sandbank. Ahead we saw grey Heron land on the rookery.
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We saw that the flood coming out of the mangrove lagoons had seriously eroded the banks of the rookery. If we have another rain event this year the rookery could be cut in half: it has happened before.
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Suddenly the plovers which were watching us and the grey heron, attacked the heron and evicted her from the rookery. Near the rookery we found a cassowary scat containing Johnstone River almond and some pond apple. We noticed pond apple seed in the high tide mark all along the beach. A big job for volunteers to pull the seedlings of this noxious plant in a month or two.

We walked around to the front beach and Bill stood in the dying mangrove forest and was shocked. He normally walked only as far as the sandbank within the estuary and had not seen the dieback on the southern side of the Johnstone River mouth.
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Debris was everywhere the flotsam from the river washed up all over this lee shore. The dieback in the Coquette Point mangroves has dramatically increase this wet season, the forest has all but gone and the ocean is eroding the dunes which once lay behind the mangrove forest.

Studies looking at mangrove dieback have been concentrated within the Johnstone River and the dieback at the mouth has not been examined in spite of my sounding the alarm some thirty years ago and almost every year since.

A man walking two dogs which were running free, not on leads although he was holding leads, passed us. When I expressed concern to him, particularly as we had just encountered the matriarch cassowary ‘Jessie’,  I was abused!

We returned to the nursery. Between the dead mangroves and the dogs the magic of the day was gone.
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Last week I included a photo of an  ‘unknown nymph’. I thought it was the nymph of a stick insect. However Bill Farmsworth, who is an entomologist put me on the right track and identified it as a plume moth. I searched the data base that Bill sent me and came up with a close match,  Deuterocopus socotranus. It appears my little fella could be a new species however we will only know if I catch it and kill it and send it to Queensland Museum for identification!!!!!!!

Cheers for now,
Yvonne.

Hi Yvonne, 

Thanks for again highlighting this damage and showing it to me. Of course it is an ugly sight and it is deplorable, if there is a cause of these deaths that is not being addressed. As a scientist, I would like to know what exactly has caused this. There certainly is anecdotal evidence (as you suggested)  that the decline in magroves has coincided with the increase in banana farming in the Johnstone/ Cassowary Coast Shire. I do know for a fact however, that banana growing is not heavily dependent on the use of residual herbicides (eg diuron and atrazine), compared with say, sugarcane farming.
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Ninds Creek sewerage overflow
It is certainly possible that agricultural chemicals are contributing to the death of those mangroves, and they could even be the major factor. You only have to see the enormous amount of sediment that comes out of the river mouth and is then blown back onto this affected area, by the south easterly winds usually associated with heavy rain. I am surprised that sampling of soil/silt/mud or dead vegetation has not been carried out already as it would be quite a simple procedure and cost would not be prohibitive. Maybe funding under Reef Rescue could be gotten. I estiamte it would cost around 1-2 thousand dollars to have these tests done. 
There are many independent, high QA laboratories that could carry out analyses for herbicides in soil/vegetation samples and this would establish unequivocally whether herbicides are responsible.

Thanks again for the lovely walk, Jessie's company and the awesome biology present everywhere, made it a magic experience.
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Yvonne spots 'Jessie'
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'Jessie'
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Yvonne and 'Jessie'
Its ironic how, just as we got to the awful stand of dead mangroves, I was nearly bowled over by an unleashed dog. The fact that the dog owner was not only unapologetic but was abusive, sadly confirms just how dumb many human beings can be. Sad really.

All the best
Bill Farnsworth

Russell Constable link
3/4/2012 03:31:37 pm

Great cassowary photos from Yvonne Cunningham at Coquette point. The LNP (and Cutis Pitt) want to dredge the area at the mouth of the Johnstone River where this bird is feeding on crabs . The main group who would benefit from such an action would be canal estate developer Metricon. This stinks and it's a fishy stink at that.
Re Metricon and dredging/soil dumping They dont have a good record re soil dumping or respect for the law!
http://www.tweedecho.com.au/index.php?option=com_content&task=view&id=793&Itemid=800

Russell Constable link
3/4/2012 03:33:15 pm

Shameless plug for one of my you tube videos...This will give you an idea of why this cassowary wanted to hunt crabs at this location
http://www.youtube.com/watch?v=8wb2z9z6vbQ

Russell Constable link
3/4/2012 03:40:36 pm

Thanks for the extra info and photos Bill. I too have seen the mangrove die back at the mouth of the Johnstone and smart money says diuron but as you say it really needs to be tested properly. Diuron is meant to be getting banned here but I notice the LNP member for Hinchinbrook Andrew Cripps violently opposes such a ban. Sadly LNP also strongly support dredging in this world heritage area...I see storm clouds in the distance!
There are some reports on Johnstone water quality on the net but even though they note mangrove die back they don’t point any fingers!


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