Browsing All Posts filed under »conservation«

Mosquitofish threaten frogs

September 25, 2017

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The mosquitofish, Gambusia holbrooki, is one of the most invasive freshwater fish species in the world.  Although it’s been widely introduced for mosquito control, it has a broad diet that includes algae, higher plants, detritus, invertebrates and fish.  As a result, the species has negative predatory and competitive effects on native fish.   Although declines in […]

Freshwater protected areas: time to get serious

September 25, 2017

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Increasingly, the declaration of freshwater protected areas is being promoted as a way of helping to stem the continuing decline in global freshwater biodiversity. While calls for freshwater protected areas have been met with limited interest in the past, this situation is changing as the philosophy of conservation evolves.    Since the 1960s, conservation has passed […]

Environmentalism with attitude: the importance of psychology

June 19, 2017

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Although public support can be crucial in achieving aquatic management goals, management approaches often receive little input from disciplines that focus on the relationship between humans and the environment.  A recently-published paper used case studies, some specifically relating to freshwater issues, to show how environmental psychology and natural sciences can work together to successfully tackle […]

Planting vegetation to stop stream bank erosion: where’s the evidence?

June 19, 2017

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Increased rates of stream bank erosion and sediment movement in disturbed catchments have been attributed to changes in catchment hydrology caused by land clearing, channel modification, the trampling activities of livestock and the removal of riparian vegetation. Given that these effects are human-induced, it’s commonly assumed that they can also be reversed by human intervention, […]

How the terrestrial landscape affects aquatic dispersal

June 19, 2017

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How does the surrounding terrestrial landscape affect the dispersal of pond-dwelling organisms? Although some studies suggest that small aquatic crustaceans can disperse efficiently across a range of intervening environments, other work has pointed to dispersal limitation, especially over large distances.  Czech researchers examined the passive dispersal of microcrustaceans (cladocerans, copepods, and ostracods) by comparing communities […]

Stocking up on threatened amphibians

March 27, 2017

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Zoos have an important role to play in helping to conserve globally threatened species and building public awareness of biodiversity issues. Following massive declines in recent decades, amphibians are now one of the most vulnerable animal groups, with over 40% of all amphibian species classified as threatened. Despite this collapse, relatively few threatened amphibians are […]

Homing in on factor interactions

March 27, 2017

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In most cases the dynamics of ecological systems are best explained as responses to a number of interacting environmental factors, rather than to a single variable. Such interactions can be complex, and although they may have major implications for management, they’re typically very poorly understood. A team of Australian researchers has proposed a method for […]