Strong and stable environmental structuring of the zooplankton communities in interconnected salt ponds

Abstract Intensive studies of Nelson Lake, a Sudbury area lake of intermediate pH ~5.7), were begun in 1975. The chemistry of the lake was typical of that of most PreCambrian Shield lakes except that low alkalinities and high sulphate concentrations were observed along with elevated heavy metal levels. After raising the pH of Nelson Lake to 6.4 by addition of Ca(OH)2 and CaCO3, the metals were reduced to background concentrations. Phytoplankton and Zooplankton communities, which at pH of 5.7 were typical of PreCambrian lakes, were not affected by the experimental elevation of lake pH.

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The Exorcism of the Salt Ponds at Xie

10.1093/oso/9780198803645.003.0003 ◽

2017 ◽

Author(s):

Barend J. ter Haar

Keyword(s):

Twelfth Century ◽

Southern China ◽

Ritual Practice ◽

Salt Ponds ◽

The South ◽

New Type ◽

The Way

The historical Guan Yu came from a village in Xie Prefecture (modern Yuncheng) in the south of the modern province of Shanxi, close to one of the main salt producing sites of traditional China. From the early twelfth century onwards a new type of worship for Lord Guan was transmitted throughout southern China by Daoist exorcist specialists, which was motivated by a story about his successful defeat of a demon causing mishap in the salt ponds of Xie. The Daoist connection of the deity was much stronger than the Buddhist one, but this was the Daoism of ritual practice, rather than the philosophical approaches as some may construct them from the Book of the Way and the Virtue that is ascribed to Laozi. A substantial numbers of temple foundations in southern China in particular can be explained through this Daoist connection.

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Factors affecting the structure of limnetic crustacean zooplankton communities in central Ontario lakes

SIL Proceedings 1922-2010 ◽

10.1080/03680770.1974.11896107 ◽

1975 ◽

Vol 19 (1) ◽

pp. 635-643 ◽

Cited By ~ 4

Author(s):

W. Gary Sprules

Keyword(s):

Crustacean Zooplankton ◽

Factors Affecting ◽

Zooplankton Communities

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Microbial drivers of methane emissions from unrestored industrial salt ponds

The ISME Journal ◽

10.1038/s41396-021-01067-w ◽

2021 ◽

Author(s):

Jinglie Zhou ◽

Susanna M. Theroux ◽

Clifton P. Bueno de Mesquita ◽

Wyatt H. Hartman ◽

Ye Tian ◽

...

Keyword(s):

Microbial Communities ◽

Methane Flux ◽

Methane Emissions ◽

Metagenomic Data ◽

Rrna Gene ◽

Salt Ponds ◽

Salt Pond ◽

Reference Wetlands ◽

Reference Wetland ◽

The Impact

AbstractWetlands are important carbon (C) sinks, yet many have been destroyed and converted to other uses over the past few centuries, including industrial salt making. A renewed focus on wetland ecosystem services (e.g., flood control, and habitat) has resulted in numerous restoration efforts whose effect on microbial communities is largely unexplored. We investigated the impact of restoration on microbial community composition, metabolic functional potential, and methane flux by analyzing sediment cores from two unrestored former industrial salt ponds, a restored former industrial salt pond, and a reference wetland. We observed elevated methane emissions from unrestored salt ponds compared to the restored and reference wetlands, which was positively correlated with salinity and sulfate across all samples. 16S rRNA gene amplicon and shotgun metagenomic data revealed that the restored salt pond harbored communities more phylogenetically and functionally similar to the reference wetland than to unrestored ponds. Archaeal methanogenesis genes were positively correlated with methane flux, as were genes encoding enzymes for bacterial methylphosphonate degradation, suggesting methane is generated both from bacterial methylphosphonate degradation and archaeal methanogenesis in these sites. These observations demonstrate that restoration effectively converted industrial salt pond microbial communities back to compositions more similar to reference wetlands and lowered salinities, sulfate concentrations, and methane emissions.

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Hydrology and local environmental factors influencing zooplankton communities in floodplain ponds

Wetlands ◽

10.1672/0277-5212(2007)27[864:halefi]2.0.co;2 ◽

2007 ◽

Vol 27 (4) ◽

pp. 864-872 ◽

Cited By ~ 20

Author(s):

Kim A. Medley ◽

John E. Havel

Keyword(s):

Environmental Factors ◽

Factors Influencing ◽

Zooplankton Communities

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Changes in the crustacean communities of Lakes Michigan, Huron, and Erie following the invasion of the predatory cladoceran Bythotrephes longimanus

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f04-149 ◽

2004 ◽

Vol 61 (11) ◽

pp. 2111-2125 ◽

Cited By ~ 105

Author(s):

Richard P Barbiero ◽

Marc L Tuchman

Keyword(s):

Zooplankton Community ◽

Crustacean Zooplankton ◽

Bythotrephes Longimanus ◽

Zooplankton Community Structure ◽

Cladoceran Species ◽

Invertebrate Predators ◽

Predatory Cladoceran ◽

Leptodora Kindti ◽

Escape Responses ◽

Zooplankton Communities

The crustacean zooplankton communities in Lakes Michigan and Huron and the central and eastern basins of Lake Erie have shown substantial, persistent changes since the invasion of the predatory cladoceran Bythotrephes in the mid-1980s. A number of cladoceran species have declined dramatically since the invasion, including Eubosmina coregoni, Holopedium gibberum, Daphnia retrocurva, Daphnia pulicaria, and Leptodora kindti, and overall species richness has decreased as a result. Copepods have been relatively unaffected, with the notable exception of Meso cyclops edax, which has virtually disappeared from the lakes. These species shifts have for the most part been consistent and equally pronounced across all three lakes. Responses of crustacean species to the Bythotrephes invasion do not appear to be solely a consequence of size, and it is likely that other factors, e.g., morphology, vertical distribution, or escape responses, are important determinants of vulnerability to predation. Our results indicate that invertebrate predators in general, and invasive ones in particular, can have pronounced, lasting effects on zooplankton community structure.

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