Turnover of DNA-P and phospholipid-P in lake sediments

Paraskova, Julia V.; Sjöberg, Per J. R.; Rydin, Emil

doi:10.1007/s10533-014-9972-3

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…These fractions together are also increasingly recommended to calculate alum dosing for internal P loading management in lakes (de Vicente et al 2008;James 2011). Note that our definition of labile organic P refers to the difference between the P fractions extracted by NaOH and persulfate (Supporting Information Method S4), an important consideration because previous studies have used variable extraction methods with the intent of distinguishing between biologically available or biologically unavailable P (Paraskova et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…In a review of internal loading research in lakes, Søndergaard et al () identified both iron‐bound P and labile organic P as mobile forms of sediment P (hereafter, mobile‐P = redox‐P + labile organic P), which are the most readily soluble and accessible to biota (Hansen et al ; James ). Degradable (i.e., labile) organic P is one of the main recyclable forms in sediments (Paraskova et al ) and is abundant in many stormwater ponds (Song et al ). While not all labile organic P is bioavailable, even small increases in labile organic P have consequences for eutrophication (Frost et al ).…”

mentioning

confidence: 99%

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Internal loading in stormwater ponds as a phosphorus source to downstream waters

Taguchi

Olsen

Natarajan

et al. 2020

Limnol Oceanogr Letters

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Stormwater ponds are common in many cities and are intended to slow runoff and improve water quality in downstream waterbodies. The use of stormwater ponds to capture and retain phosphorus is based on assumptions that most incoming phosphorus is particulate and prone to settling and that ponds remain fully aerated to prevent the release of sedimentary phosphorus via redox-driven internal loading. Our analysis of observations from stormwater ponds suggests that internal loading is common due to stratification, and the resulting low oxygen, as well as high sedimentary phosphorus availability. This indicates that many ponds have a reduced capacity to trap phosphorus and, in some cases, can release previously trapped phosphorus, potentially contributing to eutrophication in downstream waterbodies.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Internal loading in stormwater ponds as a phosphorus source to downstream waters

Taguchi

Olsen

Natarajan

et al. 2020

Limnol Oceanogr Letters

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“…The DNA-P/lipid-P ratio in the Lake Erken sediment profile, calculated from Paraskova et al (2014), declines to values below 2 at 10 cm sediment depth (Fig. 3).…”

Section: Oxic/anoxic Org-p Turnovermentioning

confidence: 95%

“…Instead, the contents are similar to those in sediments of the oligotrophic mountain Lake Ånn, located at great elevation in the Bothnian Sea catchment (fig. 1, Paraskova et al 2014). Hence, there is not a simple relationship between sedimentary DNA-P content and productivity.…”

Section: Dna-p and Lipid-pmentioning

confidence: 99%

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Contrasting distribution and speciation of sedimentary organic phosphorus among different basins of the Baltic Sea

Rydin

Broman

Reitzel

et al. 2023

Limnology & Oceanography

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Recycling of phosphorus (P) from deoxygenated sediments perpetuates eutrophic conditions in parts of the Baltic Sea. Sedimentary organic P is a major source of dissolved P to the water column, but also a sink for permanent P burial. The mechanisms behind these two pathways are, however, largely unknown. Using new methods, we determined P in DNA and phospholipids, which are both found in all organisms. We also identified inositol phosphates that are particularly important in eukaryotes. Sediment cores were collected from contrasting basins in the Baltic Sea to study their relative contribution to the total P pool. We found high DNA-P/phospholipid-P ratios in surface sediments from the Bothnian Bay and Bothnian Sea. However, these ratios were low throughout profiles in euxinic Baltic Proper sediments. The elevated ratios present in sediments overlain by oxic bottom waters might indicate the presence of a microbial community stimulated by bioturbation, whereas the low DNA-P/phospholipid-P ratios in Baltic Proper sediments likely indicate an energy-limited microbial community, typical to the "deep biosphere" environment. Inositol-P was almost absent in euxinic Baltic Proper sediments that had a low total P amount compared to those in the other basins. We suggest that variability in the composition of sedimentary microbial communities among the Baltic Sea basins might cause differences in organic P forms that in turn affects its turnover.

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Changes in the composition of phosphorus (P) compound groups in sediment and P in sediment pore water in a shallow eutrophic lake: a 31P NMR study

et al. 2016

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Turnover of DNA-P and phospholipid-P in lake sediments

Cited by 8 publications

References 25 publications

Internal loading in stormwater ponds as a phosphorus source to downstream waters

Internal loading in stormwater ponds as a phosphorus source to downstream waters

Contrasting distribution and speciation of sedimentary organic phosphorus among different basins of the Baltic Sea

Changes in the composition of phosphorus (P) compound groups in sediment and P in sediment pore water in a shallow eutrophic lake: a 31P NMR study

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