Sub-lethal and chronic salinity tolerances of three freshwater insects: Cloeon sp. and Centroptilum sp. (Ephemeroptera: Baetidae)and Chironomus sp. (Diptera: Chironomidae)

Hassell, Kathryn L.; Kefford, Ben J.; Nugegoda, Dayanthi

doi:10.1242/jeb.02457

Cited by 119 publications

(78 citation statements)

References 23 publications

(34 reference statements)

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“…However, relationships between sublethal effects and salinity are often non-monotonic, with some freshwater species performing optimally at intermediate salinity [37][38][39]. In contrast, an increase in growth or development was not observed with slightly elevated salinity in three ephemeropteran species [2,35]. EPT DCOH i n c r e a s i n g l y r a r e i n n a t u r e Figure 1.…”

Section: Exposure Durationmentioning

confidence: 99%

Salinized rivers: degraded systems or new habitats for salt-tolerant faunas?

et al. 2016

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Anthropogenic salinization of rivers is an emerging issue of global concern, with significant adverse effects on biodiversity and ecosystem functioning. Impacts of freshwater salinization on biota are strongly mediated by evolutionary history, as this is a major factor determining species physiological salinity tolerance. Freshwater insects dominate most flowing waters, and the common lotic insect orders Ephemeroptera (mayflies), Plecoptera (stoneflies) and Trichoptera (caddisflies) are particularly salt-sensitive. Tolerances of existing taxa, rapid adaption, colonization by novel taxa (from naturally saline environments) and interactions between species will be key drivers of assemblages in saline lotic systems. Here we outline a conceptual framework predicting how communities may change in salinizing rivers. We envision that a relatively small number of taxa will be saline-tolerant and able to colonize salinized rivers (e.g. most naturally saline habitats are lentic; thus potential colonizers would need to adapt to lotic environments), leading to depauperate communities in these environments.

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Section: Exposure Durationmentioning

confidence: 99%

Salinized rivers: degraded systems or new habitats for salt-tolerant faunas?

et al. 2016

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“…The energy spent in osmoregulation cannot be spent in other metabolic processes, leading to sub-lethal effects on the organImpact of potash mining in streams: the Llobregat basin (northeast Spain) as a case study Rubén isms, e.g. delayed growth (Hassell et al, 2006;Kennedy et al, 2003). When salt concentration is too high the organisms are no longer able to keep the osmotic balance within their cells and they die (Cañedo-Argüelles et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Impact of potash mining in streams: the Llobregat basin (northeast Spain) as a case study

2016

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Potash mining is significantly increasing the salt concentration of rivers and streams due to lixiviates coming from the mine tailings. In the present study, we have focused on the middle Llobregat basin (northeast Spain), where an important potash mining activity exists from the beginning of the XX century. Up to 50 million tonnes of saline waste have been disposed in the area, mainly composed of sodium chloride. We assessed the ecological status of streams adjacent to the mines by studying different physicochemical and hydromorphological variables, as well as aquatic macroinvertebrates. We found extraordinary high values of salinity in the studied streams, reaching conductivities up to 132.4 mS/cm. Salt-polluted streams were characterized by a deterioration of the riparian vegetation and the fluvial habitat. Both macroinvertebrate richness and abundance decreased with increasing salinity. In the most polluted stream only two families of macroinvertebrates were found: Ephydridae and Ceratopogonidae. According to the biotic indices IBMWP and IMMi-T, none of the sites met the requirements of the Water Framework Directive (WFD; i.e., good ecological status). Overall, we can conclude that potash-mining activities have the potential to cause severe ecological damage to their surrounding streams. This is mainly related to an inadequate management of the mine tailings, leading to highly saline runoff and percolates entering surface waters. Thus, we urge water managers and policy makers to take action to prevent, detect and remediate salt pollution of rivers and streams in potash mining areas.

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“…and Centroptilum sp. (Ephemeroptera: Baetidae) decreases (Hassell et al, 2006); developmental rates and survival are reduced for Chironomus sp. (Diptera: Chironomidae) (Hassell et al, 2006), Aedes taeniorhynchus Wiedemann and Aedes aegypti L. (Diptera: Culicidae) (Clark et al, 2004); and survival is reduced for Culex australicus Dobrotworsky and Drummond and Aedes camptorhynchus Thomson (Diptera: Culicidae) (van Schie, unpublished data).…”

Section: Introductionmentioning

confidence: 99%

“…Ephemeral water bodies are characteristic of the Wheatbelt, where they show a range of salinities, especially in areas affected by secondary salinisation, making them ideal to investigate how salinity affects the colonisation and oviposition behaviour of insects. Numerous studies have investigated how salinity influences the distribution of aquatic organisms by examining patterns in species occurrence (Halse, 1981;Bunn & Davies, 1992;Kay et al, 2001;Williams, 2003;Halse et al, 2004;Marshall & Bailey, 2004;Pinder et al, 2004;Piscart et al, 2005a) and salt sensitivity (Roberts, 1996;Blasius & Merritt, 2002;Kefford et al 2003;Jeffery et al 2005;Hassell et al, 2006;Zalizniak et al, 2006). Studies have found a range of invertebrate fauna, such as the disease vector Ae.…”

Section: Introductionmentioning

confidence: 99%

Salinity as a driver of aquatic invertebrate colonisation behaviour and distribution in the wheatbelt of Western Australia

et al. 2008

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To understand how environmental change will modify community assembly and the distribution of organisms it is valuable to understand mechanisms that drive the occurrence of organisms across the landscape. Salinisation of agricultural land in southwest Western Australia, as a result of land clearing, is a widespread environmental change, which threatens numerous taxa, but provides an opportunity to elucidate such mechanisms. Although salinisation affects terrestrial fauna and flora, the greatest impacts are seen in wetlands and waterways. Many aquatic insect taxa colonise ephemeral water bodies directly as adults or by oviposition. Few empirical studies, however, evaluate the influence of abiotic factors, such as water body salinity, on the colonisation behaviour of aquatic fauna. We conducted a manipulative experiment using mesocosms to test whether colonising insect fauna select aquatic habitats based upon salinity. We found that halosensitive fauna selected less saline mesocosms for oviposition and colonisation, demonstrating that behaviour can influence the distribution of aquatic organisms. Additionally, we utilised field surveys of insects from ephemeral water bodies across a broad region of southwest Western Australia to determine if mesocosm results reflected field observation. The abundance of the same insect taxa and taxonomic groups in the field were highly variable and, with the exceptions of Culex australicus Dobrotworksy and Drummond and Anopheles annulipes Giles (Diptera: Culicidae), did not show similar patterns of distribution to those observed in the mesocosm experiment. Both mesocosm and field assemblages exhibited similar and significant trajectories associated with the salinity gradient, even though there were differences in assemblage structure between the two. Our findings give empirical support to the importance of behaviour in the spatial distribution and assembly of some aquatic insects.

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Sub-lethal and chronic salinity tolerances of three freshwater insects: Cloeon sp. and Centroptilum sp. (Ephemeroptera: Baetidae)and Chironomus sp. (Diptera: Chironomidae)

Cited by 119 publications

References 23 publications

Salinized rivers: degraded systems or new habitats for salt-tolerant faunas?

Salinized rivers: degraded systems or new habitats for salt-tolerant faunas?

Impact of potash mining in streams: the Llobregat basin (northeast Spain) as a case study

Salinity as a driver of aquatic invertebrate colonisation behaviour and distribution in the wheatbelt of Western Australia

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