Increased Organic Carbon Burial in Northern Florida Mangrove-Salt Marsh Transition Zones
Derrick
Vaughn
dvaughn2@fsu.edu
Derrick
Vaughn
author
Thomas
Bianchi
author
Michael
Shields
author
William
Kenney
author
Todd
Osborne
author
2020
Salt marshes and mangroves are recognized globally as blue carbon habitats, burying large amounts of carbon with limited area, but they also are increasingly susceptible to current climate change. Rising temperatures and decreasing freeze frequencies are resulting in replacement of salt marshes along the southern United States by mangroves. Our results show surface soils from wetlands along northern Florida Atlantic and Gulf coasts had higher apparent sedimentation rates in mangrove-dominated sites (1.5-3.2 mm yr-1) and where mangroves are migrating into the marsh (termed transition sites, 2.3-3.8 mm yr-1). Average carbon burial rates were higher in transition sites for both coasts (27-47 gC m-2 yr-1) compared to the respective mangrove (10-22 gC m-2 yr-1) and salt marsh (4-7 gC m-2 yr-1) sites. Lignin biomarker data (_-6, _-8, C/V) indicated mangrove and transition sites had higher lignin inputs from woody vascular plants compared to salt marsh sites. Higher amino acid concentrations in mangrove soils relative to mangrove biomass (1.8-2.3 mmol gC-1 vs. 0.2-0.9 mmol gC-1) and lower C/N indicated these mangrove sites receive higher algal inputs than the transition and salt marsh sites and we attribute this difference to greater tidal inundation in the mangrove sites given their position near the shoreline.
blue carbon
carbon burial
Florida
Big Bend
salt marsh
mangrove
biomarker
lignin
carbon storage
This dataset is listed under a Creative Commons BY 4.0 and can be used with attribution. https://creativecommons.org/licenses/by/4.0/
St_Augustine
-81.2456944444444
-81.2406944444444
29.7289722222222
29.7279722222222
Waccasassa_Bay
-82.8213944444445
-82.8153277777778
29.0988888888889
29.0755555555556
St_Augustine_Mangrove
-81.2452777777778
-81.2452777777778
29.7280555555556
29.7280555555556
St_Augustine_Salt_Marsh
-81.2411111111111
-81.2411111111111
29.7286111111111
29.7286111111111
St_Augustine_Transition
-81.2433333333333
-81.2433333333333
29.7288888888889
29.7288888888889
Waccasassa_Bay_Mangrove
-82.8158333333333
-82.8158333333333
29.0775
29.0775
Waccasassa_Bay_Salt_Marsh
-82.8208333333333
-82.8208333333333
29.0969444444444
29.0969444444444
Waccasassa_Bay_Transition
-82.8208888888889
-82.8208888888889
29.0963888888889
29.0963888888889
2017-04-11
2020-08-01
Species
Avicennia germinans
Species
Sporobolus alterniflorus
Species
Batis maritima
Species
Rhizophora mangle
Species
Juncus roemericanus
Derrick
Vaughn
dvaughn2@fsu.edu
vaughn_et_al_2020_methods_data
Methods information for study
vaughn_et_al_2020_material_and_methods.csv
column
,
study_id
Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail.
string
Free text
coring_method
Code indicating what type of device was used to collect soil depth profiles.
string
vibracore
A technique involving collecting a core by sinking a continuous pipe into sediment attaching a source of vibration, then recovering using a winch and pulley
roots_flag
Code indicating whether live roots were included or excluded from carbon assessments.
string
roots and rhizomes included
Roots and rhizomes were included in dry bulk density and or organic matter and carbon measurements
sediment_sieved_flag
Code indicating whether or not sediment was sieved prior to carbon measurements.
string
sediment sieved
Sediment was sieved prior to analysis for organics
compaction_flag
Code indicating how the authors qualified or quantified compaction of the core.
string
no obvious compaction
Authors observed no obvious compaction
dry_bulk_density_sample_volume
Sample volume used for bulk density measurements, if held constant.
float
cubicCentimeter
real
dry_bulk_density_flag
Any notable codes regarding how the authors quantified dry bulk density.
string
freeze dried
Bulk density was measured on freeze dried samples
carbonates_removed
Whether or not carbonates were removed prior to calculating fraction organic carbon.
string
TRUE
Carbonates were removed before measuring organic carbon.
carbonate_removal_method
The method used to remove carbonates prior to measuring fraction carbon.
string
acid fumigation
Carbonates were removed by fumigating with concentrated acid
carbon_measured_or_modeled
Code indicating whether fraction carbon was measured or estimated as a function of organic matter.
string
measured
Fraction carbon was measured as opposed to modeled
fraction_carbon_method
Code indicating the method for which fraction carbon was measured or modeled (Note: regression based models are permitted, but the use of the Bemmelen factor [0.58 gOC gOM-1] is discouraged).
string
EA
Each sample presented was measured using Elemental Analysis
fraction_carbon_type
Code indicating whether fraction_carbon refers to organic or total carbon.
string
organic carbon
Author specified that fraction carbon measurements were of organic carbon
cs137_counting_method
Code indicating the method used for determining radiocesium activity.
string
gamma
Gamma counting method used.
pb210_counting_method
Code indicating the method used for determining lead 210 activity.
string
gamma
Gamma counting method used.
ra226_assumption
Code indicating the assumption used to estimate the core's background 226Ra levels.
string
each sample
226Ra was measured for each sample
age_depth_model_reference
Code indicating the reference or 0 year of the age depth model.
string
CE
Year zero is set according to Common Era and Before Common Era standards
vaughn_et_al_2020_core_data
Soil core information
vaughn_et_al_2020_cores.csv
column
,
study_id
Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail.
string
Free text
site_id
Site identification code unique to each study.
string
Free text
core_id
Core identification code unique to each site.
string
Free text
core_date
Date of core collection.
date
YYYY-MM-DD
core_latitude
Positional latitude of the core in decimal degree WGS84.
float
degree
real
core_longitude
Positional longitude of the core in decimal degree WGS84.
float
degree
real
core_position_method
Code indicating how latitude and longitude were determined.
string
handheld
Conventional Commercially available hand-held GPS
core_position_notes
Any relevant submitter generated notes on how latitude and longitude were determined.
string
Free text
salinity_class
Code based on submitter field observation or measurement indicating average annual salinity (Note: Palustrine and freshwater should only include tidal wetlands, or wetlands that are potentially/formerly tidal but artificially freshened due to artificial tidal restrictions).
string
estuarine
0.5-35 ppt according to most definitions
salinity_method
Indicate whether salinity_class was determined using a field observation or a measurement
string
field observation
Salinity inferred by field observation such as vegetation
vegetation_class
Code based on submitter field observations or measurement indicating dominant wetland vegetation type.
string
emergent
Describes wetlands dominated by persistent emergent vascular plants
scrub shrub
Describes wetlands dominated by woody vegetation < or equal to 5 meters in height
vegetation_method
Indicate whether vegetation_class was determined using a field observation or a measurement
string
measurement
Vegetation measured by counts or plots.
inundation_class
Code based on submitter field observation or measurement indicating how often the coring location is inundated.
string
high
Study-specific definition of an elevation relatively high in the tidal frame, typically defined by vegetation type
mid
Study-specific definition of an elevation in the relative middle of the tidal frame, typically defined by vegetation type
inundation_method
Indicate whether inundation_class was determined using a field observation or a measurement
string
field observation
Inundation inferred by field observation such as vegetation
vaughn_et_al_2020_depthseries_data
Soil core depthseries information
vaughn_et_al_2020_depthseries.csv
column
,
study_id
Unique identifier for the study made up of the first author's family name, as well as the second author's or 'et al.' if more than three, then publication year spearated by underscores. See worksCited.bib for more detail.
string
Free text
site_id
Site identification code unique to each study.
string
Free text
core_id
Core identification code unique to each site.
string
Free text
depth_min
Minimum depth of a sampling increment.
float
centimeter
real
depth_max
Maximum depth of a sampling increment.
float
centimeter
real
sample_id
Sample identification unique to the core. This should be used in the case that there are relevant lab specific sample codes, or in the case that there are multiple replicate samples.
string
Free text
dry_bulk_density
Dry mass per unit volume of a soil sample. This does not include ash free bulk density.
float
gramsPerCubicCentimeter
real
fraction_carbon
Mass of carbon relative to sample dry mass.
float
dimensionless
real
cs137_activity
Radioactivity counts per unit dry weight for radiocesium (137Cs).
float
disintegrationPerMinutePerGram
real
cs137_activity_sd
1 standard deviation of uncertainty associated with cs137_activity.
float
disintegrationPerMinutePerGram
real
total_pb210_activity
Total radioactivity counts per unit dry weight for excess lead 210 (210Pb).
float
disintegrationPerMinutePerGram
real
total_pb210_activity_sd
1 standard deviation of uncertainty associated with total_pb210_activity.
float
disintegrationPerMinutePerGram
real
ra226_activity
Total radioactivity counts per unit dry weight for Radium 226 (226Ra) if measured as part of the 210Pb dating process.
float
disintegrationPerMinutePerGram
real
ra226_activity_sd
1 standard deviation of uncertainty associated with ra226_activity.
float
disintegrationPerMinutePerGram
real
excess_pb210_activity
Excess radioactivity counts per unit dry weight for excess lead 210 (210Pb).
float
disintegrationPerMinutePerGram
real
excess_pb210_activity_sd
1 standard deviation of uncertainty associated with excess_pb210_activity.
float
disintegrationPerMinutePerGram
real
delta_c13
The isotopic signature of 13C. This is oftentimes measured along with c14_age and can be useful for analyzing carbon lability and provenance.
float
dimensionless
real
CRS_model_age
Age of soil at depth as determined by excess Pb-210 activity using the constant rate of supply (CRS) model
float
nominalYear
real
CRS_age_se
Standard error of age estimation of soil at depth as determined by excess Pb-210 activity using the constant rate of supply (CRS) model
float
nominalYear
real
carbon_nitrogen_ratio
Molar ratio of total organic carbon to total nitrogen
float
dimensionless
real
BACON_model_age
Mean calibrated radiocarbon date using the age-depth BACON (Bayesian accumulation histories for deposits) calibration model
float
nominalYear
real
BACON_model_age_min
Minimum calibrated radiocarbon date using the age-depth BACON (Bayesian accumulation histories for deposits) calibration model
float
nominalYear
real
BACON_model_age_max
Maximum calibrated radiocarbon date using the age-depth BACON (Bayesian accumulation histories for deposits) calibration model
float
nominalYear
real
total_lignin_l8
summation of vanillyl (V), syringyl (S), and cinnamyl (C) lignin phenols normalized to 100 mg of OC
float
milligramsPerOneHundredMilligramsOrganicCarbon
real
lignin_l6
summation of V and S phenols normalized to 100 mg OC
float
milligramsPerOneHundredMilligramsOrganicCarbon
real
CV_phenols_ratio
ratio of C phenols to V phenols, used to estimate non-woody vs. woody vascular plant inputs
float
dimensionless
real
SV_phenols_ratio
ratio of S phenols to V phenols, used to estimate angiosperm vs. gymnosperm vascular plant inputs
float
dimensionless
real
ad_al_vanillyls_ratio
acid-to-aldehyde ratios of the vanillyl lignin phenol group, used as a degradation indicator
float
dimensionless
real
ad_al_syringyls_ratio
acid-to-aldehyde ratios of the syringyl lignin phenol group, used as a degradation indicator
float
dimensionless
real
total_amino_acids
summation of 19 amino acids that were detected and quantified, normalized to OC
float
millimolesPerGramOrganicCarbon
real
fraction_amino_acids_nitrogen
Fraction of which the 19 amino acids made of the total nitrogen pool
float
dimensionless
real
degradation_index
Amino acid degradation index generated from mole percentages of each amino acid in a principal component analysis
float
dimensionless
real
DAPA_concentration
Carbon-normalized concentration of the individual amino acid Diaminopimelic acid (DAPA)
float
micromolesPerGramOrganicCarbon
real
GABA_concentration
Carbon-normalized concentration of the individual amino acid gamma-aminobutyric acid (GABA)
float
micromolesPerGramOrganicCarbon
real
Hyp_concentration
Carbon-normalized concentration of the individual amino acid hydroxyproline (Hyp)
float
micromolesPerGramOrganicCarbon
real
MurA_concentration
Carbon-normalized concentration of the individual amino acid muramic acid (MurA)
float
micromolesPerGramOrganicCarbon
real
disintegrations per minute per gram is a measure of the activity of the source of radioactivity
cubic centimeter
summation of measured object normalized to 100 mg organic carbon
Concentration normalized to 1 g organic carbon
Concentration normalized to 1 g organic carbon