Download A Handbook of Global Freshwater Invasive Species by Robert A. Francis PDF

By Robert A. Francis

Invasive non-native species are a massive risk to international biodiversity. usually brought by accident via foreign go back and forth or exchange, they invade and colonize new habitats, usually with devastating outcomes for the neighborhood wildlife. Their environmental affects can diversity from harm to source creation (e.g. agriculture and forestry) and infrastructure (e.g. constructions, street and water supply), to human healthiness. They therefore could have significant monetary affects. it's a precedence to avoid their advent and unfold, in addition to to manage them. Freshwater ecosystems are fairly in danger from invasions and are panorama corridors that facilitate the unfold of invasives.  This e-book studies the present kingdom of data of the main impressive international invasive freshwater species or teams, in line with their severity of monetary impression, geographic distribution outdoors in their local variety, quantity of analysis, and popularity of the ecological severity of the impression of the species by means of the IUCN. As good as many of the very recognized species, the booklet additionally covers a few invasives which are rising as severe threats. Examples coated comprise a variety of aquatic and riparian vegetation, bugs, molluscs, crustacea, fish, amphibians, reptiles and mammals, in addition to a few significant pathogens of aquatic organisms.  The publication additionally contains evaluate chapters synthesizing the ecological influence of invasive species in clean water and summarizing useful implications for the administration of rivers and different freshwater habitats.

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For example, the invasive diatom Didymosphenia geminate has been found to bloom at higher frequency and densities in association with dam sites (Kirkwood et al, 2009). In general, low flow variability and lower than natural levels of fluvial disturbance have been linked to greater invasibility (Mortenson and Weisberg, 2010). The installation of dams and creation of associated impoundments can also create artificial, relatively homogeneous ecosystems that can support alien species. For example, impoundments have been found to have far greater occurrences of alien species than natural lakes due to higher levels of connectivity, disturbance and environmental heterogeneity (Havel et al, 2005; Johnson et al, 2008), and may act as ‘stepping stones’ for the further spread of aliens.

G. HIV (human immunodeficiency virus), West Nile virus, cholera). Perhaps the most obvious example of the former is the spread of invertebrates that act as vectors for diseases to which humans are susceptible, for example mosquitoes. Elton’s (1958) discussion of the spread of Anopheles arabiensis in Brazil highlights this, and documents an extensive but successful control programme as a result; a useful lesson being perhaps that those IAS that do impact on human health are more likely to be subject to control and eradication measures.

Resh et al, 1988; Reice et al, 1990). g. g. Tabacchi et al, 1996) and the entrainment, transportation and deposition of biotic and abiotic ecosystem components. Disturbance can relate to both increases and decreases in flow, and can be both beneficial and detrimental to the spread and establishment of alien species (see Richardson et al, 2007). If a species introduced to a river system has a greater capacity to tolerate or recover from disturbance than some native species then it may be able to outcompete natives and become dominant.

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