Characterization of lacustrine harmful algal blooms using multiple biomarkers: historical processes, driving synergy, and ecological shifts

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Characterization of lacustrine harmful algal blooms using multiple biomarkers : historical processes, driving synergy, and ecological shifts

Lin, Qi (författare): State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China

Zhang, Ke (författare): State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China

McGowan, Suzanne (författare): Department of Aquatic Ecology, Netherlands Institute of Ecology, Wageningen, Netherlands

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Huang, Shixin (författare): State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China

Xue, Qingju (författare): State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China

Capo, Eric (författare): Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Department of Marine Biology, Institut de Ciències del Mar, CSIC, Barcelona, Spain

Zhang, Can (författare): State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China

Zhao, Cheng (författare): School of Geography and Oceanography Sciences, Nanjing University, Nanjing, China

Shen, Ji (författare): State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China; School of Geography and Oceanography Sciences, Nanjing University, Nanjing, China

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Elsevier, 2023
2023
Engelska.
Ingår i: Water Research. - : Elsevier. - 0043-1354 .- 1879-2448. ; 235

Relaterad länk:: https://urn.kb.se/re...; visa fler...; https://doi.org/10.1...; visa färre...

Tidskriftsartikel (refereegranskat)

Abstract Ämnesord

Stäng

Harmful algal blooms (HABs) producing toxic metabolites are increasingly threatening environmental and human health worldwide. Unfortunately, long-term process and mechanism triggering HABs remain largely unclear due to the scarcity of temporal monitoring. Retrospective analysis of sedimentary biomarkers using up-to-date chromatography and mass spectrometry techniques provide a potential means to reconstruct the past occurrence of HABs. By combining aliphatic hydrocarbons, photosynthetic pigments, and cyanotoxins, we quantified herein century-long changes in abundance, composition, and variability of phototrophs, particularly toxigenic algal blooms, in China's third largest freshwater Lake Taihu. Our multi-proxy limnological reconstruction revealed an abrupt ecological shift in the 1980s characterized by elevated primary production, Microcystis-dominated cyanobacterial blooms, and exponential microcystin production, in response to nutrient enrichment, climate change, and trophic cascades. The empirical results from ordination analysis and generalized additive models support climate warming and eutrophication synergy through nutrient recycling and their feedback through buoyant cyanobacterial proliferation, which sustain bloom-forming potential and further promote the occurrence of increasingly-toxic cyanotoxins (e.g., microcystin-LR) in Lake Taihu. Moreover, temporal variability of the lake ecosystem quantified using variance and rate of change metrics rose continuously after state change, indicating increased ecological vulnerability and declined resilience following blooms and warming. With the persistent legacy effects of lake eutrophication, nutrient reduction efforts mitigating toxic HABs probably be overwhelmed by climate change effects, emphasizing the need for more aggressive and integrated environmental strategies.

Ämnesord

NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)

Nyckelord

Climate warming
Critical transition
Cyanotoxin
Harmful cyanobacterial bloom
Lake paleoecology
Variability

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Av författaren/redakt...: Lin, Qi; Zhang, Ke; McGowan, Suzanne; Huang, Shixin; Xue, Qingju; Capo, Eric; visa fler...; Zhang, Can; Zhao, Cheng; Shen, Ji; visa färre...

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Ekologi

NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Miljövetenskap

Artiklar i publikationen: Water Research

Av lärosätet: Umeå universitet

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