St. Lucia estuary mouth is closing!

 This pic was taken on Saturday 11  June 2022.  The St. Lucia estuary mouth is where three water sources meet. First is the Umfolozi River mouth. Next is the lake tidal link and the third is the Indian ocean. In the past. The Umfolozi and Mzundusi overflow were managed separately from the lake tidal link. The main reasoning behind this separation was the vast quantities of silt within the Umfolozi River flood waters. 

The 2017 GEF PROJECT ignored this silt factor,  and the scientists appointed by the iSimangaliso Wetland Park Authority ran a very effective public perception management strategy to endure that the public accepted their rather nasty proposal to link the Umfolozi River directly to the rest of the St. Lucia lake systems, in their efforts to get water into the St. Lucia lake systems.

The results are now evident as can be seen here. Silt has settled in nasty places and clogged up the inter-tidal flow paths  Mud, mud and more mud  now needed to be removed.  This is going to be difficult.

What ideas do you have that may help us solve this problem ?

Got an idea ?  One that may help solve the problem ! Send it to 4u2fish@info4u.co.za

 

The silt levels within the St. Lucia lake and estuary systems is  much worse than the IWPA is telling.  The tidal link between the lake and estuary systems is now a thing of the past, but we need this tidal channel to work so that the fish breeding and nursery grounds may become functional.  the St. Lucia lake  system used to sustain more than 60 percent of all fish breeding grounds in South Africa.  This is now not available to our fish stocks. thus is a rather nasty problem, and our marine fish stocks are suffering a very disturbing loss of juvenile recruitment , meaning that this is leading to a collapse of our coastal fish stocks.

what to do ?  everybody appears to be ignoring these losses of nursery grounds for our coastal marine fishes.

how will we bring this problem into the foreground of nature conservation and the management of our local  natural renewable resources ?

any help will be appreciated.   see our Facebook pages at facebook.com/4u2fish and leave a comment discussing your views on this nasty problem.

Fishing in the St. Lucia estuary is a waste of your time

Today, 9 October 2019, I took a drive to the beach at St. Lucia with Petrus Bierpens pens of #BierpensTV and then walked to where the whale watching boats launch. It was such a beautiful morning, unfortunately my finances do not currently allow me the privilege of a camera to take some pics and upload them here.  Any way on the way from Ingwe Beach to the beach launch  location I walked along the estuary side and not the sea shore.

I was once again saddened by the mud flats full of flamingoes and a variety of fresh water ducks and other water birds in the space where we should be fishing the incoming tide. After the recent north east winds which blew the water from  lake St. Lucia into the Umfolozi and Umzinduze river deltas, and this mornings calmness, the water in the St. Lucia Estuary Mouth area was flowing happily from South to North, returning  into the lake systems north of St. Lucia.

Most folks have no idea of the vast volumes of water that the winds move around the St. Lucia lake system, or the scary figures of water evaporation which takes place  on the surface of the waterways connected to lake St. Lucia and the St. Lucia estuary systems. When trying to explain how the St. Lucia estuary system should be functioning as a breeding ground for many marine fish species, the current situation confuses most folks, and they battle to understand the connections between water flow and phytoplankton as the primary food source at the extreme base of the food chain.

Phytoplankton does not do very well in standing water, and also prefers a mix of fresh  or sweet water and sea or salt water. Phytoplankton is the primary diet of Zooplankton, and zoo plankton is the second tier in the food chain.  So the fact that the St. Lucia estuary is closed, and there is no sea water mixing with the fresh water from the Umfolozi and other rivers in the Greater St. Lucia Wetlands Park, means that the base of the food chain within lake St. Lucia and the St. Lucia estuary system is dysfunctional and not really able to support  the current biological load within the many different bio zones of the iSimangaliso Wetland Park.

Very few of the folks that I speak to here in the streets of St. Lucia actually connect the dots between the food chain in the estuary and the food chain in the terrestrial areas adjacent to Lake St. Lucia and the St. Lucia Estuary system, or the food chain on our offshore reefs which have just recently been included in brand new MPA's  ( Marine Protected Areas )

Now that these new areas are protected to conserve our fish stocks,  I am truly Confuckumalated, because there is NO mention of JUVENILE RECRUITMENT that I could find.  Most of the fish species that these new legislations are attempting to protect are dependant on a functioning estuary for their breeding and the protection of their fry, before they are big enough to venture out into the ocean and populate our off shore reefs. Many of the reef fish in the new MPA's also consume biological bio mass connected to a functioning estuary such as prawns, crabs and the juvenile fish of many different species of fish and other marine species that breed and mature within the safety of the reed  beds, mangrove swamps and other safe havens encountered in Lake St. Lucia, the St. Lucia estuary system and surrounding waterways.

So taking into account that there are no juvenile fish entering the St. Lucia estuary and lake systems, and that the ocean is not connected to the St. Lucia estuary system, you are truly wasting your ti me, effort and financial resources if you go fishing in the St. Lucia estuary
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