19. The limnology of saline lakes in Western Victoria

Williams, W. D.

doi:10.1007/bf00048719

Cited by 71 publications

(6 citation statements)

References 57 publications

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“…M. baylyi is widely distributed in southern Australia (south-western Western Australia, south-eastern South Australia, Victoria and Tasmania) and has been reported in waters with salinities up to 129 g L À1 , but is typically reported in waters with salinities below 25 g L À1 (De Deckker and Geddes 1980;De Deckker and Williams 1982;Pinder et al 2005). It is one of only a few halophilic species suggested to have colonised salt lakes directly from the marine environment (Williams 1981).…”

Section: Harpacticoideamentioning

confidence: 99%

“…The terms 'halotolerant', 'halophile' and 'halobiont' are commonly used to classify the aquatic fauna of salt lakes based on their relationship with salinity, although these terms are variously used (Bayly 1972;Williams 1981;Timms 1983;Hammer 1986;Pinder et al 2002). Herein, 'halotolerant' describes biota that predominately occur in fresh water (salinity ,3 g L À1 ) but occasionally occur in waters with salinity up to ,20 g L À1 , whereas 'halophiles' are biota that occur mostly in athalassic waters (salinity .10 g L À1 ; Williams 1981).…”

Section: Introductionmentioning

confidence: 99%

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Biology and conservation of the unique and diverse halophilic macroinvertebrates of Australian salt lakes

Lawrie¹,

Chaplin²,

Pinder³

2021

Mar. Freshwater Res.

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This study synthesises information on the biology of the unique and diverse halophilic macroinvertebrates of Australian salt lakes, focusing on gastropods and crustaceans. This information is needed to evaluate and manage the threats posed to these invertebrates by increased periods of drought and secondary salinisation. Most of these species are endemic to Australian salt lakes, and some have adapted to extreme conditions (e.g. salinities .100 g L À1 and pH ,5). This study identifies key general findings regarding the taxonomy, ecology and life histories of these invertebrates, such as that many 'new' species have been uncovered in the past 20 years, with more likely to come. The study also identifies critical knowledge gaps, such as the need to elucidate the abiotic and biological drivers of the field distributions of species, including why some species are widespread and common whereas other congeneric species are rare or have narrow distributions. Those species that are either restricted to low salinity environments or survive dry periods as aestivating adults (as opposed to desiccation-resistant eggs) are probably the most vulnerable to increasing salinisation and drought. Future work should prioritise the development of a sound taxonomy for all groups, because this is needed to underpin all other biological research.

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Section: Harpacticoideamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biology and conservation of the unique and diverse halophilic macroinvertebrates of Australian salt lakes

Lawrie¹,

Chaplin²,

Pinder³

2021

Mar. Freshwater Res.

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“…1). These lakes were formed by volcanic activity starting in the early Pliocene (Williams 1981) and have been hydrologically isolated from one another for the past 10,000 years since the last major wet phase in the region (Bowler 1981). The lakes have been the location of extensive limnological studies due to their unique fauna (Khan 2003;Leahy 2010;Williams 1981).…”

Section: Study Areamentioning

confidence: 99%

“…These lakes were formed by volcanic activity starting in the early Pliocene (Williams 1981) and have been hydrologically isolated from one another for the past 10,000 years since the last major wet phase in the region (Bowler 1981). The lakes have been the location of extensive limnological studies due to their unique fauna (Khan 2003;Leahy 2010;Williams 1981). However, due to a combination of poor land management and extreme drought over the past 40 years, many lakes have been subject to extreme biodiversity loss, and consequently, despite extensive surveys of lakes previously known to contain each species (Leahy 2010), both our target species were only found in four lakes.…”

Section: Study Areamentioning

confidence: 99%

Long term environmental stability drives reduced stress tolerance in salt lake invertebrates

O'dwyer¹,

Murphy²

2021

ReEco

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The capacity of species to tolerate physical stressors is critical in a world of increasing environmental instability, however, past selective environments should dramatically impact on future stress tolerance, particularly in isolated populations. Through stabilising selection, long-term environmental stasis may reduce physiological tolerance, creating an evolutionary legacy where populations are less fit if environments change. Few empirical studies have investigated this evolutionary legacy of past selection, and of particular interest whether stabilising selection in a benign environment reduces stress tolerance in natural systems. Here we use multiple populations of salt-lake invertebrates (Coxiella striata, Austrochiltonia subtenuis) with either stable or fluctuating environmental histories to investigate the relationship between stabilising selection and environmental stress resistance. Tolerance to both salinity and temperature stress were examined in invertebrate populations from lakes with long-term (decadal) stable environments and compared with populations from lakes with extreme salinity variations. Individuals from stable environments demonstrated significantly lower survival under both increasing salinity and temperature stresses when compared with environmentally unstable populations. Our results support the hypothesis that the evolutionary legacy from stabilising selection in constant environments leads to reduced stress tolerance. This finding demonstrates that under an increasingly variable climate, the evolutionary legacies of populations will be critical for future survival and adaptation.

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“…Early investigations in Australian salinas (Bayly and Williams 1966;Bayly 1970) emphasised water chemistry and the unusual fauna but did not consider the role of a salinity scale or any other factors on diversity. It took a few decades for researches to consider these factors and to try to quantify them (Bayly 1969(Bayly , 1970(Bayly , 1976Timms 1973Timms , 1981Timms , 1987Timms , 1993Timms , 1996Timms , 1998aTimms , 1998bTimms , 2001aTimms , 2001bTimms , 2007Timms , 2008Timms , 2009aTimms , 2009bTimms , 2018Geddes 1976;De Deckker and Geddes 1980;Geddes et al 1981;Williams 1981Williams , 1984Williams , 1998Williams and Kokkinn 1988;Williams et al 1990;Pinder et al 2002Pinder et al , 2004Pinder et al , 2005. In many of these studies, the conclusions are clearly enunciated, but in others a re-analysis of the data is necessary.…”

Section: Introductionmentioning

confidence: 99%

Drivers restricting biodiversity in Australian saline lakes: a review

Timms¹

2021

Mar. Freshwater Res.

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Inland saline lakes are well known to be less biodiverse than fresh waters. In Australia, the most important driver affecting biodiversity is salinity that imposes an inverse linear relationship. However, in detailed studies across a wide salinity spectrum, the relationship is scale dependent. This is mediated in part by the range of salinity tolerated becoming broader as the maximum tolerated salinity increases. Other factors of importance sometimes include hydrology, habitat heterogeneity, season, pH and oxygen, but these are usually not easy to quantify. Even rarer is the influence of colonisation by marine organisms, which is applicable only at some sites near the coastline and the influence of ionic proportions on the presence of some species and, hence, diversity. The contribution of predation or competition on diversity, reported in some overseas salinas, is suspected but yet to be proved in Australia. The crustacean component in saline lakes is more influenced by these drivers than is most of the insect fraction.

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19. The limnology of saline lakes in Western Victoria

Cited by 71 publications

References 57 publications

Biology and conservation of the unique and diverse halophilic macroinvertebrates of Australian salt lakes

Biology and conservation of the unique and diverse halophilic macroinvertebrates of Australian salt lakes

Long term environmental stability drives reduced stress tolerance in salt lake invertebrates

Drivers restricting biodiversity in Australian saline lakes: a review

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