Diatom Seasonality and Sedimentation in a Subtropical Alpine Lake (Lugu Hu, Yunnan-Sichuan, Southwest China)

Wang, Qin; Yang, Xiangdong; Anderson, Nicholas; Ji, Junfeng

doi:10.1657/aaar0014-039

Cited by 32 publications

(17 citation statements)

References 45 publications

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“…; Wang et al . ). In the functional classification of the freshwater phytoplankton of Reynolds et al .…”

Section: Discussionmentioning

confidence: 97%

“…In Lugu Lake, on the Yunnan Plateau, its peak abundance was found to occur in spring and was a result of the combination of a well‐mixed water column, higher nutrient concentration and low light availability (Wang et al . ). The species often appears in high‐nutrient, alkaline water bodies (Anderson , ; Anderson et al .…”

Section: Discussionmentioning

confidence: 97%

“…In Lugu Lake, on the Yunnan Plateau, peaks in the concentration of C. ocellata occurred in autumn and were associated with greater light penetration and declining dissolved organic carbon (DOC) concentration and water temperatures (Wang et al . ).…”

Section: Discussionmentioning

confidence: 97%

“…Reports on living populations of this species (from the Fuxian and Lugu lakes) indicate that it is associated with the period of mixing in spring before the establishment of a thermocline (Zhang et al 2007;Wang et al 2015). In the functional classification of the freshwater phytoplankton of Reynolds et al (2002) this species is a member of codon A, i.e.…”

Section: Autoecology Of the Main Taxamentioning

confidence: 99%

“…Strong wind and sediment resuspension in autumn may be favourable to this species (Kilham et al 1996;Bradshaw & Anderson 2003). In Lugu Lake, on the Yunnan Plateau, its peak abundance was found to occur in spring and was a result of the combination of a wellmixed water column, higher nutrient concentration and low light availability (Wang et al 2015). The species often appears in high-nutrient, alkaline water bodies (Anderson 1990(Anderson , 1997Anderson et al 1993;Fritz et al 1993;Bradbury et al 1994;Edlund & Stoermer 2000;Bradshaw & Anderson 2003;Yang et al 2008).…”

Section: Autoecology Of the Main Taxamentioning

confidence: 99%

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Diatom response to Asian monsoon variability during the Holocene in a deep lake at the southeastern margin of the Tibetan Plateau

Liu

Xiao

et al. 2015

Boreas

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Diatom analysis was applied to a 5.56‐m‐long sediment core, spanning the last 7.8 ka, from Lake Chenghai on the southeastern margin of the Tibetan Plateau. Diatom assemblages are dominated by Cyclotella rhomboideo‐elliptica, Cyclostephanos dubius and small fragilarioid and periphytic taxa. These diatom taxa are interpreted to be sensitive to changes in trophic status and/or turbulence of the water column that are probably related to variations in precipitation and temperature induced through the Asian monsoon. High abundances of C. dubius, Staurosirella pinnata and periphytic taxa suggest higher trophic status (mesotrophic) and stronger turbulence in the water column in the middle Holocene (7.8–4.5 ka BP). During the period of 4.5–2.3 ka BP, a decline in C. dubius, S. pinnata and periphytic taxa, and an increase in C. rhomboideo‐elliptica with the appearance of Cyclotella ocellata suggests a response to decreasing trophic level (more oligotrophic). After 2.3 ka BP, the persistent increases in C. rhomboideo‐elliptica and the loss of Cyclotella ocellata mirrored a further decrease in trophic level (oligotrophic). The main changes in the diatom assemblages in the Lake Chenghai sediment core reflect direct and indirect climate forcing and in particular, the strength of monsoonal precipitation, which in turn corresponds to orbitally induced variability in Northern Hemisphere summer solar insolation since 7.8 ka BP.

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“…; Wang et al . ). In the functional classification of the freshwater phytoplankton of Reynolds et al .…”

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 97%

Section: Autoecology Of the Main Taxamentioning

confidence: 99%

Section: Autoecology Of the Main Taxamentioning

confidence: 99%

See 3 more Smart Citations

Diatom response to Asian monsoon variability during the Holocene in a deep lake at the southeastern margin of the Tibetan Plateau

Liu

Xiao

et al. 2015

Boreas

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Holocene lake phosphorus species and primary producers reflect catchment processes in a small, temperate lake

Klamt

Poulsen

Odgaard

et al. 2021

Ecological Monographs

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This paleolimnological study aims to investigate how natural processes and anthropogenic land‐use changes have affected sedimentary phosphorus (P) forms and primary producers in a small, temperate lake (Lake Fuglsø, Denmark) throughout the Holocene. Our multi‐proxy approach uses pollen, X‐ray fluorescence scanning, carbon (C) and nitrogen contents and stable isotopes, sequential P extraction, 31P nuclear magnetic resonance spectroscopy, pigments, diatoms, and plant macrofossils from a 14C‐dated sediment record. We found three periods of human impact: (1) low disturbance from domestic grazing during the early/mid Neolithic (~3600 to ~2600 BC), (2) higher disturbance because of animal husbandry and some grain cultivation during the Late Bronze and Pre‐Roman Iron Age (~800 BC to AD ~100), and (3) strong disturbance caused by domestic grazing, intensified crop cultivation and, in particular, by retting of fiber plants during the Middle Ages and Renaissance (AD ~1000 to ~1700). Cultural eutrophication during the latter phase caused unprecedented changes in the lake, including altered species composition, high production, and strongly accelerated sediment accumulation rates. Generally, catchment deforestation was related to elevated proportions of metal (iron, aluminum, calcium)‐bound P forms in the sediment, while high tree cover correlated with elevated proportions of P forms associated with organic material (“organic” P, humic‐bound P, refractory organic P) and loosely bound P. During phases with forest in the catchment, silicon (Si) inputs to the lake were insufficient and diatom frustules were mostly absent in the sediments. In contrast, diatoms thrived in the lake when the landscape was open and erosional Si influx was high. This study is the first to show long‐term (~eight millennia) and recurring Si limitation of diatoms, a finding that may explain the absence of diatoms in sediment records of other sites too. In summary, human land‐use with preceding deforestation accelerated the transport of nutrients and elements from the terrestrial to the aquatic environment, leading to substantial and irreversible changes in Lake Fuglsø. Our study is a good example of the tight links between catchment processes and lake status, indicating that catchment dynamics should be considered in lake restoration projects, particularly for lowland lakes with high catchment : lake area ratios.

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Influence of glacial turbidity and climate on diatom communities in two Fjord Lakes (British Columbia, Canada)

Laird¹,

Barouillet²,

Cumming³

et al. 2021

Aquat Sci

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Diatom Seasonality and Sedimentation in a Subtropical Alpine Lake (Lugu Hu, Yunnan-Sichuan, Southwest China)

Cited by 32 publications

References 45 publications

Diatom response to Asian monsoon variability during the Holocene in a deep lake at the southeastern margin of the Tibetan Plateau

Diatom response to Asian monsoon variability during the Holocene in a deep lake at the southeastern margin of the Tibetan Plateau

Holocene lake phosphorus species and primary producers reflect catchment processes in a small, temperate lake

Influence of glacial turbidity and climate on diatom communities in two Fjord Lakes (British Columbia, Canada)

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