[PDF] Eradication of the invasive seaweed Caulerpa taxifolia by chlorine bleach | Semantic Scholar (2024)

This study provided essential verification of C. taxifolia eradication efforts, and demonstrates the feasibility of incorporating quality control/quality assurance components in rapid response actions, and suggests that seeds of eelgrass are viable for at least two years.

Field eradication efforts have included manual and vacuum pump harvesting, covering colonies with opaque tarpaulins, subjecting C. taxifolia to a range of noxious chemicals, temperature, and salinity shocks, while outreach, monitoring, and modeling are promoted as ways to prevent future incursions.

Five chemical treatments were tested—chlorine bleach, rock salt, copper sulfate, acetic acid, and fluridone—to determine the best techniques for rapid eradication or control of an invasion by aquarium Chaetomorpha.

To evaluate potential invasion of C. taxifolia—aquarium strain to Florida’s coastal waters, a logistic regression model was used to predict current and future probabilities of Caulerpa spp.

The goal of this project was to determine the minimum treatment combination (quantity and exposure duration) of acetic acid needed to eradicate aquarium Chaetomorpha, and found that a 4% solution exposed for 10 minutes caused 100% mortality within 24 hours.

Three well-integrated components of this rapid response have resulted in an effective eradication program, with the requisite resources (approximately $US1.2 million per year), which has resulted in containment, treatment and excellent progress toward eradication of C. taxifolia.

In insights as to how freshwater may be used as a routine biosecurity management tool when applied pre-border to shipping vectors potentially transporting non-indigenous marine biofouling species, Freshwater is now routinely used for the post-border management of Tubastraea spp.

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The results of this study provide the basis for the development of an environmentally sound means of selectively reducing the dominance of the aggressive strain of C. taxifolia in areas where it adversely affects the native plants and animals.

Results indicate a cold-tolerance threshold of 9 to 11°C, thus genetic modification does not need to be invoked to explain the occurrence of C. taxifolia in the northwest Mediterranean.

Light and temperature responses confer to the Mediterranean strain C taxifolia, introduced in 1984, a large potential for expansion throughout the Mediterranean Sea and also in adjacent troplcal and temperate seas.

It is hypothesize that the productivity of these algae is limited in part by animal-mediated sediment disturbances, which is low compared to rates of many benthic macroalgae.

The results show that the Californian alga is the same as the invasive Mediterranean strain, calling for its rapid eradication to prevent a new invasion.

It is proposed that spore dispersal from fixed stands of Undaria results primarily in short-range spread, with dispersal of fragments or whole sporophytes facilitating spread at scales of hundreds of metres to kilometres.

Although the production capacity of C. taxifolia must be limited during the winter months by low seawater temperature, calculations show that gross primary production will exceed total respiratory consumption on cloudless days when incident noon peak irradiance is greater than 32 μηιοί photons m~s~ I .

Results indicate that dispersal by fragmentation can greatly contribute to a very wide spread of the alga in the Mediterranean and predict that spread will be greatest during summer when a large proportion of fragments can re-attach to the substratum, even at shallow sites.

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