The Ecological Significance of Cladoceran Remains in Lake Sediments

Frey, David

doi:10.2307/1931802

Cited by 159 publications

(104 citation statements)

References 10 publications

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“…The concentrated remains were then transferred to 5% formalin. We identified and counted up to 200 cladoceran remains per sample (headshields, shells, post-abdomens, post-abdominal claws, mandibles and others) using the determination keys of Frey (1960) and a standard microscope at 100-200 magnification. Details about the diatoms and Cladocera subfossil analyses are reported elsewhere (Marchetto et al 2004;Manca et al 2007a).…”

Section: Chemical and Biological Analysesmentioning

confidence: 99%

Ecological effects of multiple stressors on a deep lake (Lago Maggiore, Italy) integrating neo and palaeolimnological approaches

et al. 2012

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Section: Chemical and Biological Analysesmentioning

confidence: 99%

Ecological effects of multiple stressors on a deep lake (Lago Maggiore, Italy) integrating neo and palaeolimnological approaches

et al. 2012

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“…The major factor determining occurrence of a species in a sediment core is the character of its remnants. Chitinous carapaces and head shields of the family Chydoridae are somewhat thicker than those of planktonic taxa and generally preserve rather well (Frey, 1960). And indeed, taxa included in our study were generally most frequently found in 'PI' and 'R' samples.…”

Section: Detection Of Speciesmentioning

confidence: 46%

Long-term change of the littoral Cladocera in the Tatra Mountain lakes through a major acidification event

et al. 2006

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In our study, we focused on littoral Cladocera living and feeding in shallow shore parts of 46 mountain lakes in the Tatra Mountains (Slovakia and Poland). The studied lakes underwent a major acidification event in the 1980s and are now in the process of recovery. Lakes were divided into three categories based on their sensitivity to acidification: 5 extremely sensitive (ES), 11 acid sensitive (AS), and 30 non-sensitive (NS) lakes. In our study, we included historical data from the literature, and data from sediment core and littoral samples, which together represent the evolution of the littoral communities from a pre-industrial period up to the present. In total, 11 littoral species were found belonging to three cladoceran families. Most of the species were members of the family Chydoridae: Alona affinis, A. quadrangularis, A. rectangula, A. guttata, Acroperus harpae, Alonella excisa, A. nana, Chydorus sphaericus, and Eurycercus lamellatus. One species belonged to each family Daphniidae (Ceriodaphnia quadrangula) and Polyphemidae (Polyphemus pediculus). The most numerous littoral taxa were Alona affinis, Acroperus harpae, and Chydorus sphaericus. All species reacted to decreased pH levels during peak acidification in the 1980s by disappearing from most of the lakes of all categories; the only persisting species was Chydorus sphaericus. Most species returned to the lakes when pH started to increase in the 1990s, although their return was noticeably slower in AS lakes. Alona quadrangularis decreased its distribution range over the studied period; Polyphemus pediculus was mostly detected in the 1910s only. The number of species was highest in all lake categories when dwarf pine was present in the lake catchment. On the whole, the littoral community was richest in NS lakes.

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“…Cladocera sub-fossil remains were counted on ca 3 g wet weight of sediment, after treating the sample with the method proposed by Frey (1986) and following the recommendations of the EMERGE Protocol (2000). At least 200 remains were counted and identified following Frey (1960) at magnifications between 100 and 200x.…”

Section: Methodsmentioning

confidence: 99%

Unusual median pores of Alona head shields recovered from recent and pre-industrial sediments of Alpine lakes

Manca¹,

Margaritora²

2008

J Limnol

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The Ecological Significance of Cladoceran Remains in Lake Sediments

Cited by 159 publications

References 10 publications

Ecological effects of multiple stressors on a deep lake (Lago Maggiore, Italy) integrating neo and palaeolimnological approaches

Ecological effects of multiple stressors on a deep lake (Lago Maggiore, Italy) integrating neo and palaeolimnological approaches

Long-term change of the littoral Cladocera in the Tatra Mountain lakes through a major acidification event

Unusual median pores of Alona head shields recovered from recent and pre-industrial sediments of Alpine lakes

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