Citation:

PANGAEA.972744 (dataset in review)

Name: Sediment biogeochemistry and diatom assemblages in dated sediment core from lake Santa Maria del Oro (Nayarit, Mexico)
License: https://creativecommons.org/licenses/by/4.0/
Keywords: biogeochemistry; Carbon cycle; Diatom; isotopes; Lake sediment; Late Holocene; Mexico; primary production; Tropical

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Abstract:

This dataset comprises multiproxy biogeochemical data and diatom assemblage data for a sediment sequence (LSm-22-1) from lake Santa Maria del Oro (Nayarit, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (97 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth >50 m) in April 2022. After initial core scanning, the sediment core was sectioned at 5-mm to 1-cm intervals. The data are provided for these discrete sediment sections from 0 cm down to the depth of 34 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and three radiocarbon (C-14) measurements. Diatom data include taxa present with at least 0.5% relative abundance in any sample.

Keyword(s):

biogeochemistry; Carbon cycle; Diatom; isotopes; Lake sediment; Late Holocene; Mexico; primary production; Tropical

Related to:

Rantala, Marttiina V; et al. (submitted): Anthropogenic increase in organic carbon production and burial in two tropical crater lakes from central Mexico.

References:

Aquino-Lopez, Marco A; Blaauw, Maarten; Christen, Andrés; Sanderson, Nicole K (2018): Bayesian Analysis of 210Pb Dating. Journal of Agricultural Biological and Environmental Statistics, 23(3), 317-333, https://doi.org/10.1007/s13253-018-0328-7

Heiri, Oliver; Lotter, André F; Lemcke, G (2001): Loss on ignition as a method for estimating organic and carbonate content in sediments: reproducibility and comparability of results. Journal of Paleolimnology, 25(1), 101-110, https://doi.org/10.1023/A:1008119611481

Zhang, Fule; Wang, Jinlong; Baskaran, Mark; Zhong, Qiangqiang; Wang, Yali; Paatero, Jussi; Du, Jinzhou (2021): A global dataset of atmospheric 7Be and 210Pb measurements: annual air concentration and depositional flux. Earth System Science Data, 13(6), 2963-2994, https://doi.org/10.5194/essd-13-2963-2021

Coverage:

Latitude: 21.365278 * Longitude: -104.568333

Date/Time Start: 2022-04-08T00:00:00 * Date/Time End: 2022-04-08T00:00:00

Minimum DEPTH, sediment/rock: 0.0025 m * Maximum DEPTH, sediment/rock: 0.3350 m

Event(s):

LSMo22-1 * Latitude: 21.365278 * Longitude: -104.568333 * Date/Time: 2022-04-08T00:00:00 * Elevation: 750.0 m * Location: Lake Santa Maria del Oro, Nayarit, Mexico * Method/Device: Sediment corer, UWITEC

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Rantala, Marttiina V		Geocode – Midpoint of sediment section
2	Depth, top/min	Depth top	m	Rantala, Marttiina V
3	Depth, bottom/max	Depth bot	m	Rantala, Marttiina V
4	AGE	Age	ka BP	Rantala, Marttiina V	Age, Bayesian based model Plum on Pb-210 and C-14 data	Geocode – Plum version 0.5.1 by Aquino-López et al. (2018)
5	Age	Age	a AD/CE	Rantala, Marttiina V	Age, Bayesian based model Plum on Pb-210 and C-14 data	Plum version 0.5.1 by Aquino-López et al. (2018)
6	Organic matter	OM	%	Rantala, Marttiina V	Determined by loss on ignition at 550°C, after Heiri et al. (2001)
7	Carbonates	Carb	%	Rantala, Marttiina V	Determined by loss on ignition at 950°C, after Heiri et al. (2001)
8	Density, dry bulk	DBD	g/cm³	Rantala, Marttiina V	Determined based on water content of volumetric samples
9	Sedimentation rate per year	SR	cm/a	Rantala, Marttiina V	Calculated based on sediment section thickness and elapsed time
10	Accumulation rate, mass, per year	MAR	g/cm²/a	Rantala, Marttiina V	Calculated based on dry bulk density and sediment accumulation rate
11	Accumulation rate, carbon, organic	Acc rate C org	g/cm²/a	Rantala, Marttiina V	Calculated based on organic carbon content and mass accumulation rate	Values corrected for sediment focusing using mean annual precipitation data (Cerro Blanco station) and atmospheric 210Pb flux estimated based on equations for latitudinal bands 10–20°N and 20–30°N from Zhang et al. 2021
12	Carbon, organic, total	TOC	%	Rantala, Marttiina V	Elemental analyzer (EA), Elementar, vario MICRO cube
13	Nitrogen, total	TN	%	Rantala, Marttiina V	Elemental analyzer (EA), Elementar, vario MICRO cube
14	δ13C	δ13C	‰	Rantala, Marttiina V	Isotope ratio mass spectrometer, Elementar, IsoPrime	Values from acidified samples
15	δ15N	δ15N	‰	Rantala, Marttiina V	Isotope ratio mass spectrometer, Elementar, IsoPrime	Values from nonacidified samples
16	Carbon/Nitrogen ratio	C/N	mol/mol	Rantala, Marttiina V	Isotope ratio mass spectrometer, Elementar, IsoPrime	Calculated based on values from acidified samples for both elements
17	Chlorophyll a, z-score	Chl a z		Rantala, Marttiina V	Visible-near infrared spectroscopy, Foss NIRsystems, Model 6500 Rapid Content Analyzer	Initial data in mg/g converted to z-scores
18	Carbon, organic, total, z-score	TOC z		Rantala, Marttiina V	Visible-near infrared spectroscopy, Foss NIRsystems, Model 6500 Rapid Content Analyzer	Sediment-inferred lake water TOC; Initial data in mg/L converted to z-scores
19	Aulacoseira granulata	A. granulata	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
20	Aulacoseira ambigua	A. ambigua	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
21	Stephanocyclus meneghinianus	S. meneghinianus	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
22	Nitzschia amphibia	N. amphibia	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
23	Nitzschia amphibia forma frauenfeldii	N. amphibia f frauenfeldii	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
24	Nitzschia fonticola	N. fonticola	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
25	Nitzschia paleacea	N. paleacea	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
26	Nitzschia sp.	Nitzschia sp.	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]	sp. 1
27	Fragilaria radians	F. radians	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
28	Ulnaria ulna	U. ulna	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
29	Epithemia musculus	E. musculus	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
30	Epithemia adnata	E. adnata	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
31	Epithemia sorex	E. sorex	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
32	Rhopalodia operculata	R. operculata	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
33	Amphora copulata	A. copulata	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
34	Halamphora veneta	H. veneta	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
35	Gomphonema affine	G. affine	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
36	Gomphonema sp.	Gomphonema sp.	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]	sp. 3
37	Gomphonema sp.	Gomphonema sp.	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]	sp. 5
38	Rhoicosphenia californica	R. californica	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
39	Sellaphora nigri	S. nigri	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
40	Sellaphora saugerresii	S. saugerresii	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
41	Sellaphora sp.	Sellaphora sp.	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]	sp. 1
42	Sellaphora sp.	Sellaphora sp.	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]	sp. 2
43	Hippodonta hungarica	H. hungarica	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
44	Hippodonta sp.	Hippodonta sp.	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]	sp. 1
45	Navicula subrhynchocephala	N. subrhynchocephala	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
46	Navicula cryptocephala	N. cryptocephala	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
47	Navicula lundii	N. lundii	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
48	Placoneis anglophila	P. anglophila	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
49	Cocconeis neothumensis	C. neothumensis	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
50	Cocconeis placentula sensu lato	C. placentula sl	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
51	Planothidium delicatulum	P. delicatulum	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
52	Achnanthidium minutissimum sensu lato	A. minutissimum sl	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
53	Gogorevia exilis	G. exilis	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]
54	Diatoms, fragilarioid taxa	Fragilarioid	%	Rantala, Marttiina V	Light microscope, Zeiss [1000x magnification]	small fragilarioids

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Size:

1696 data points

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