Tag: estuaries

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Could flooding wetlands, be the next big carbon capture method?

The Nywaigi people of Australia have found that by doing this, this behaviour can sequester carbon, boost biodiversity and create jobs.

It is thought that peatlands, store twice as much carbon as rainforests, so their protection and recovery is essential if we are to maintain the wonderful climate that has allowed the human race to flourish.

In this instance (not the place that the video comes from) just 1 decade ago, the area was bad. Much of it was freshwater pasture, with a load of invasive weeds that were choking both the land and the waterways. This was caused by a ‘bund’, an earth wall build 50 years ago, to block off incoming seawater, in order to transform the area into freshwater ponded pasture (to be used for cattle pasture). You can find a video on this project to restore this area, and the bottom of this article.

Continue reading “Could flooding wetlands, be the next big carbon capture method?”

La Plata Dolphin

La Plata dolphin

Also known as franciscana or toninha, this is a river dolphin, found in the coastal waters of southeastern South America. Being a member of the Inioidea family, it is only capapable of living in saltwater, so is found in the ocean and saltwater estuaries. This has an unfortunate effect of being around the mouth of rivers, and therefore being effected by all the pollutants picked up the whole route of the river.

It is also regularly noted, that this run-off kills off the fish which this dolphin species requires for survival. It was first described in 1844.

It is thought that fewer than 30,000 of these animals remain in the wild.

There is some tourism around this species. As we get links they will appear beneath the news section below.

Guiana dolphin

Guiana dolphin

The Guiana dolphin (also known as estuarine dolphin or costero) is a dolphin which lives alongside central and Southern America. It was agreed as a separate species back in 2007. It looks like a bottlenose dolphin (though smaller at 2.1m. They do not bowride, but avoid them.

It has an electroreceptive sense – the suggestion is that all toothed whales have this, but it is unclear. It was described as a separate species back in 1864 (from the Tucuxi). This was questioned for some time, but is certainly confirmed from now.

It is found in estuaries and similar up and down the coast. The population in Guanabara bay is currently near Rio de Janeiro, down from 70 in 1995 and 400 in 1985.

Below is some footage of some of these dolphins. Below that is a list of mentions on this website (whether there is currently, we hope there will be in the future).

Harbour Porpoise

Harbour Porpoise

This is one of the smallest cetaceans, which spends the majority of its time in estuaries and harbours – though it will sometimes venture up rivers, and have been found 100km from the coast.

They get their name from an anglicized version of the french word Porpois. This in turn comes from a medieval Latin amalgamation of two word – these are porcus (pig) and Piscus (fish). I think that these names are rather unfair, but still.

Its range is the North Atlantic, North Pacific and the Black sea. The populations are not continuous and as such there is a series of sub-populations that are geographically limited.

They are thought to have a global population of around 700,000, the Baltic sea is the only one which is seriously endangered, and that is the Baltic sea population which is thought to be around 500. Others could become endangered if current trends continue such as the Black sea population which is currently estimated to number around 12,000.

They have to spend a great deal of time looking for food, as they need to eat 7-8% of their bodyweight each day.

Generally, they live 8-13 years although individuals have been recorded living to over 20.

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