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Zeng, Linghan; Engels, Stefan; Swann, George E A; Chen, Xu; Huang, Xianyu; Cao, Yanmin; McGowan, Suzanne (2024): Sedimentary records of chironomids and pigments from Poyang Lake (middle Yangtze floodplain, China) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967584

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Published: 2024-09-02 • DOI registered: 2024-10-01

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Abstract:
The sedimentary chironomids and pigments in two Yangtze floodplain (China) lake sediment cores since 1800s CE. The sediment cores were dated using lead-210 with the constant rate of supply (CRS) model. Chironomids were ananlyzed following standard procedures. About 10 g wet samples were firstly deflocculated using 10% potassium hydroxide (KOH) in a 75 °C water bath for about 15 minutes. Then, sediments were gently washed through 212 μm and 90 μm sieves with water after which the residues on the sieves were backwashed into a sorting tray. Chironomid head capsules were picked out individually using fine forceps under a dissecting microscope. The chironomid head capsules were identified using a microscope at ×100/×400 magnification. At least 50 head capsules were picked out from each sample to make the results and interpretations statistically robust.
Related to:
Zeng, Linghan; Engels, Stefan; Swann, George E A; Chen, Xu; Huang, Xianyu; Cao, Yanmin; McGowan, Suzanne (2024): Sedimentary records of chironomids and pigments from Wanghu Lake (middle Yangtze floodplain, China) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967582
Funding:
National Natural Science Foundation of China (NSFC), grant/award no. 42201173: Quantitative reconstruction of centurial high-resolution underwater light variability using sedimentary pigments
National Natural Science Foundation of China (NSFC), grant/award no. 42271165
National Natural Science Foundation of China (NSFC), grant/award no. U20A2094: Climate and biological processes in the geological evolution of typical key zones in western Hubei
Coverage:
Latitude: 29.169100 * Longitude: 116.077700
Event(s):
PoyangLake * Latitude: 29.169100 * Longitude: 116.077700 * Method/Device: Sediment corer (SEDCO) * Comment: cored in 2016
Comment:
The sediment cores were dated using lead-210. Chironomid samples were prepared and analysed following the methods presented in Brooks et al., (2007).
Sedimentary pigments (including canthaxanthin and UVR index) were analyzed using a high performance liquid chromatography (HPLC). The concentration of canthaxanthin was calibrated using total organic carbon. The UVR index calculated by dividing the concentration of UVR-absorbing pigments relative to the sum of alloxanthin, diatoxanthin and lutein-zeaxanthin and multiplying by 100.
Elements (TP, Zn and Al) were analyzed using an inductively coupled plasma-atomic emission spectrometry (ICP-AES) after digesting with a mixture of acid (HF:HCl:HNO3:HClO4, 3:0.5:6:0.5, v/v).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1AgeAgea AD/CEZeng, LinghanAge, 210Pb
2Chironomus plumosusC. plumosus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
3ClinotanypusClinotanypus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
4CorynoneuraCorynoneura%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
5CricotopusCricotopus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
6Cricotopus sylvestrisC. sylvestris%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
7CryptochironomusCryptochironomus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
8Dicrotendipes nervosusD. nervosus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
9Endochironomus albipennisE. albipennis%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
10EukiefferiellaEukiefferiella%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
11HarnischiaHarnischia%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
12HydrobaenusHydrobaenus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
13Microchironomus tenerM. tener%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
14OrthocladiusOrthocladius%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
15ParachironomusParachironomus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
16ParatanytarsusParatanytarsus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
17Paratanytarsus penicillatusP. penicillatus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
18Propsilocerus akamusiP. akamusi%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
19Polypedilum nubiferP. nubifer%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
20ProcladiusProcladius%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
21PseudochironomusPseudochironomus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
22TanytarsusTanytarsus%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
23Tanytarsus mendaxT. mendax%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
24Chironomidae indeterminataChironomidae indet%Zeng, LinghanChironomid analysis (Brooks et al, 2007)
25ChironomidaeChironomidae%Zeng, LinghanChironomid analysis (Brooks et al, 2007)macrophyte-related
26ChironomidaeChironomidae%Zeng, LinghanChironomid analysis (Brooks et al, 2007)eutrophic
27Ultraviolet indexUV indexZeng, LinghanHigh Performance Liquid Chromatography (HPLC)
28Canthaxanthin, per unit mass total organic carbonCantha/TOCnmol/gZeng, LinghanHigh Performance Liquid Chromatography (HPLC)
29Zinc/Aluminium ratioZn/AlZeng, LinghanInductively coupled plasma atomic emission spectroscope (ICP-AES)(10-3)
30Phosphorus, totalTP%Zeng, LinghanInductively coupled plasma atomic emission spectroscope (ICP-AES)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
957 data points

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