Spatial patterns and diversity of foraminifera from an intermittently closed and open lagoon, Smiths Lake, Australia

Strotz, Luke C.

doi:10.1016/j.ecss.2015.07.048

Cited by 12 publications

(9 citation statements)

References 83 publications

(53 reference statements)

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“…The species has previously been noted both in Tasmania (Callard et al 2011) and Victoria (Apthorpe, 1980), and, in agreement with our findings, often occurs as a near-monospecific fauna (Hayward, 2014). However, the species is not documented in lower latitude Australian sites (Berkeley et al 2008(Berkeley et al , 2009Cann et al 1993;Haslett, 2001;Haslett et al 2010;Horton et al 2003;Lal et al 2020;Strotz, 2015;Wang & Chappell, 2001;Woodroffe, 2005), which may suggest that the species has a preference for temperate salt marshes in Australia.…”

Section: Foraminiferal Distributions and Diversity In Southeastern Australia And New Zealandsupporting

confidence: 91%

“…However, they find only very low total counts in all surface samples (mean 3.27 specimens/g sediment), with single occurrences common. Furthermore, at Smiths Lake located north of Sydney (Strotz, 2015), species diversity of benthic foraminifera is also markedly higher than at our sites. Species common to our sites include M. fusca, T. inflata, Textularia spp., and A. agglutinans.…”

Section: Foraminiferal Distributions and Diversity In Southeastern Australia And New Zealandcontrasting

confidence: 67%

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Development of a Training Set of Contemporary Salt-Marsh Foraminifera for Late Holocene Sea- Level Reconstructions in southeastern Australia

et al. 2021

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We collected contemporary foraminiferal training sets from two salt marshes to enable more precise and accurate proxy historical sea-level reconstructions from southeastern Australia. Combined with an existing training set from Tasmania, this new regional set consists of 112 samples and 16 species of foraminifera, of which 13 are agglutinated. Cluster analyses group the regional training set into a highelevation cluster, dominated by Trochamminita salsa, a mid-elevation cluster, dominated by Entzia macrescens and Trochammina inflata, and a mid-low elevation cluster dominated by Miliammina fusca and tidal-flat species. We develop transfer functions using local and regional training sets and assess their performance. Our resulting site-specific and chosen regional models are capable of predicting sea level with decimetre-scale precision (95% confidence intervals of 0.12-0.22 m). These results are comparable to other examples from around the world. When developing regional training sets, we advocate that the similarity in the environmental settings (particularly salinity) should be assessed as an alternative way of grouping sites, rather than simply using spatial proximity. We compare our findings with global results and conclude that salt marshes along microtidal coasts yield models with the lowest vertical uncertainties. Studies with the lowest uncertainties are located in the western Pacific and the western Atlantic, whereas those from the eastern Atlantic generally have larger tidal ranges and carry larger vertical uncertainties. Our models expand the existing region available for sea-level reconstruction and can be used to generate new late Holocene sea-level reconstructions across southeastern Australia.

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Section: Foraminiferal Distributions and Diversity In Southeastern Australia And New Zealandsupporting

confidence: 91%

Section: Foraminiferal Distributions and Diversity In Southeastern Australia And New Zealandcontrasting

confidence: 67%

Development of a Training Set of Contemporary Salt-Marsh Foraminifera for Late Holocene Sea- Level Reconstructions in southeastern Australia

et al. 2021

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“…A possible mechanistic explanation for the transitional structure of the nematode assemblages is the intermediate pattern of isolation compared to lagoons and coastal lakes. Increasing isolation from open ocean conditions also alters the structure of foraminiferans and macrobenthic assemblages, leading to a decrease in diversity and changes of species [ 22 , 39 ]. The higher diversity of nematode assemblages in brackish water compared to freshwater reflects both the input of marine species and the presence of strong environmental gradients and higher environmental heterogeneity.…”

Section: Discussionmentioning

confidence: 99%

Regime shifts in coastal lagoons: Evidence from free-living marine nematodes

Netto

Fonseca

2017

PLoS ONE

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We test the validity of using the regime shift theory to account for differences in environmental state of coastal lagoons as a response to variation in connectivity with the sea, using free-living nematodes as a surrogate. The study is based on sediment samples from the inner and outer portions of 15 coastal lagoons (5 open to the sea, 5 intermittently open/closed, and 5 permanently closed lakes) along the southern coast of Brazil. Environmental data suggested that there are two contrasting environmental conditions, with coastal lakes being significantly different from open and intermittent lagoons. Marine nematode assemblages corroborate these two mutually exclusive alternative stable states (open vs. closed systems), but assemblages from the intermittently open/closed lagoons showed a gradual change in species composition between both systems independently of the environmental conditions. The gradient in the structural connectivity among lagoons and the sea, due to their regime shifts, changes the movement of resources and consumers and the internal physico-chemical gradients, directly affecting regional species diversity. Whereas openness to the sea increased similarity in nematode assemblage composition among connected lagoons, isolation increased dissimilarity among closed lagoons. Our results from a large-scale sampling program indicated that as lagoons lose connectivity with the sea, shifting the environmental state, local processes within individual intermittently open/closed lagoons and particularly within coastal lakes become increasingly more important in structuring these communities. The main implication of these findings is that depending on the local stable state we may end up with alternative regional patterns of biodiversity.

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“…Because of the large sampling surface covered and the investigative character of our study, we opted for a Van Veen grab sampler; it is a low cost, easy and fast method (e.g., (Nesbitt et al, 2015;Strotz, 2015). The FOBIMO (FOraminiferal BIo-MOnitoring) initiative considers this method inappropriate for foraminiferal studies (Schönfeld et al, 2012).…”

Section: Context and Limitations Of The Studymentioning

confidence: 99%

Spatial distribution of living (Rose Bengal stained) benthic foraminifera in the Loire estuary (western France)

Mojtahid

Geslin

Coynel

et al. 2016

Journal of Sea Research

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Spatial patterns and diversity of foraminifera from an intermittently closed and open lagoon, Smiths Lake, Australia

Cited by 12 publications

References 83 publications

Development of a Training Set of Contemporary Salt-Marsh Foraminifera for Late Holocene Sea- Level Reconstructions in southeastern Australia

Development of a Training Set of Contemporary Salt-Marsh Foraminifera for Late Holocene Sea- Level Reconstructions in southeastern Australia

Regime shifts in coastal lagoons: Evidence from free-living marine nematodes

Spatial distribution of living (Rose Bengal stained) benthic foraminifera in the Loire estuary (western France)

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