Browsing All Posts filed under »climate change«

Recognising uncertainty in hydro modelling

September 25, 2017

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Because climate warming is thought to be a major cause of long-term shifts in storm runoff and the frequency of extreme floods and droughts, reliable projections of future hydrological changes are essential for the informed management of water resources.  However, hydrological modelling involves dealing with a wide range of uncertainties, and so far these uncertainties […]

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 […]

Human impacts on ecological connectivity

June 19, 2017

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Ecological connectivity – the exchange of organisms between habitat patches or subpopulations – has an influence on many key processes, including population dynamics, nutrient flux, disease transmission, species invasions, food-web interactions, genetic isolation and the maintenance of biodiversity. A recent study reviewed ways in which graph theory has been used to investigate how human activities […]

Unravelling trends in stream nitrogen

March 27, 2017

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Oxides of nitrogen derived from agriculture, industry and emissions from the burning of fossil fuels fall out from the atmosphere and enter terrestrial and freshwater ecosystems. Over the last century the deposition of reactive nitrogen has increased three to five times, and this is reflected in a general global increase in stream nitrogen concentrations. However, at […]

Factoring history into threat assessments

December 13, 2016

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Genetic variation allows populations to adapt to environmental changes, and it’s often the case that threatened species exhibit low genetic diversity. Human-produced habitat fragmentation is a well-recognised cause of genetic bottlenecks, but the additional effects of larger-scale biogeographic factors are rarely considered. As an example of such biogeographic impacts, populations that have managed to survive […]

Emergent wetland plants as conduits for methane

December 13, 2016

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Wetlands release more methane to the atmosphere than other any other type of ecosystem and wetland plants, especially those in the shallow fringing zones, play an important role in methane dynamics. However, aquatic plants can be damaged by the grazing activities of herbivorous animals. To examine the impacts of grazing damage on the release of […]

Advantages of rough wetland designs

June 1, 2016

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In natural wetlands, the unevenness of the ground creates variation in environmental factors such as soil moisture and temperature, and this variability is a positive influence on the range of plant species that are able to colonise the area. As they become established, plants such as sedges and rushes slowly create tussocks, which further increase […]