surface mats – Aquarius-Systems

Weed Harvesting Helps Control Hybrid Watermilfoil in Lake Hallie

Tue, 21 Dec 2021 21:40:36 +0000

Lake Hallie Lake Association is making some headway in the war they’ve been waging against the hybrid watermilfoil weed.

First discovered in Lake Hallie in 2005, watermilfoil is an invasive aquatic plant that has an aggressive tendency to form a thick mat-like layer as it floats on the water. If left unchecked, this plant can cover huge areas of water, blocking sunlight from reaching more desirable plants and making boat traffic difficult.

Using a weed harvesting machine, the Lake Association harvests from May to September, multiple times per week. Over the course of the season, from 200-300 tons of the plant are removed from the lake.

Aquatic Weed Harvester Contracted to Remove Salvinia From Lakewood Community Lake

Fri, 17 Dec 2021 19:20:38 +0000

An aquatic weed believed to be salvinia molesta, which grew only along the shoreline in January, has multiplied so fast it now covers the entire surface of the water at Lakewood residential community, Pemulwuy, Australia.

The lake and its surrounds were home to an abundance of wildlife including ducks, pelicans and a pair of black swans, but that birdlife had thinned substantially since the weed coverage increased.

Due to unseasonably high temperatures has resulted in above-average water temperatures promoting the growth of the salvinia.
An aquatic weed harvester is being contracted to clear the lake of the invasive species and work is expected to last two weeks.

Water Chestnut Spreads in New York and Harms Aquatic Ecosystems and Recreation

Fri, 17 Dec 2021 14:33:28 +0000

Trapa natans is native to Western Europe and Africa and northeast Asia, including eastern Russia, China, and southeast Asia to Indonesia. Trapa natans was first introduced to North America in the mid- to late-1870s, when it is known to have been introduced into the Cambridge botanical garden at Harvard University around 1877.

A decade later later, the aquatic invasive species made its way to New York and now stretches fro Long Island, inland to the Hudson River Valley and up to Lake Champlain and is spread throught the Finger Lakes.

The water chestnut most directly impacts aquatic ecosystems by blocking sunlight from penetrating the water and preventing other aquatic vegetation from photosynthesizing. At the same time, the water chestnut photosynthesizes at the surface, restricting oxygen exchange under its cover. Other aquatic life, particularly fish, can be sensitive to low-oxygen environments. For the recreationist, water chestnuts make boating, fishing and swimming a crowded feat.

Giant Salvinia Returned to Barnett Reservoir After Chemical Treatment and Removal

Fri, 05 Nov 2021 16:47:06 +0000

In July, the last known patches of Giant Salvinia, an invasive and aggressive aquatic plant at the Barnett Reservoir in Mississippi, were eliminated.

The vegetation was treated with multiple chemicals and then removed, but after six months of Giant Salvinia being absent from the lake, the cleanup team discovered the unwelcomed guest.

Apparently a stray piece survived the chemical treatments; and being a fern, a tiny piece can make a whole new plant and it can duplicate in size in just 48 hours. Over the course of six months, that piece can become the size of a cove.