Increased Organic Carbon Burial in Northern Florida Mangrove-Salt Marsh Transition Zones

2020

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Data table(s) 3

Other entity(ies) 0

Abstract

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.

Metadata Provider

 

Creators

  • Derrick  Vaughn  dvaughn2@fsu.edu

Associated parties

  • Derrick  Vaughn 
  • Thomas  Bianchi 
  • Michael  Shields 
  • William  Kenney 
  • Todd  Osborne 

Keywords

Temporal coverage

Start date End date
2017-04-11 2020-08-01

Geographic coverage

Taxonomic coverage

Rank name Value
Species Avicennia germinans
Species Sporobolus alterniflorus
Species Batis maritima
Species Rhizophora mangle
Species Juncus roemericanus

Data tables


vaughn_et_al_2020_methods_data , Methods information for study


Physical: vaughn_et_al_2020_material_and_methods.csv
attribute name definition format, unit or codes
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.
coring_method Code indicating what type of device was used to collect soil depth profiles. 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. 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. sediment sieved = Sediment was sieved prior to analysis for organics 
compaction_flag Code indicating how the authors qualified or quantified compaction of the core. no obvious compaction = Authors observed no obvious compaction 
dry_bulk_density_sample_volume Sample volume used for bulk density measurements, if held constant. cubicCentimeter
dry_bulk_density_flag Any notable codes regarding how the authors quantified dry bulk density. freeze dried = Bulk density was measured on freeze dried samples 
carbonates_removed Whether or not carbonates were removed prior to calculating fraction organic carbon. TRUE = Carbonates were removed before measuring organic carbon. 
carbonate_removal_method The method used to remove carbonates prior to measuring fraction carbon. 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. 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). EA = Each sample presented was measured using Elemental Analysis 
fraction_carbon_type Code indicating whether fraction_carbon refers to organic or total carbon. organic carbon = Author specified that fraction carbon measurements were of organic carbon 
cs137_counting_method Code indicating the method used for determining radiocesium activity. gamma = Gamma counting method used. 
pb210_counting_method Code indicating the method used for determining lead 210 activity. gamma = Gamma counting method used. 
ra226_assumption Code indicating the assumption used to estimate the core's background 226Ra levels. each sample = 226Ra was measured for each sample 
age_depth_model_reference Code indicating the reference or 0 year of the age depth model. CE = Year zero is set according to Common Era and Before Common Era standards 

vaughn_et_al_2020_core_data , Soil core information


Physical: vaughn_et_al_2020_cores.csv
attribute name definition format, unit or codes
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.
site_id Site identification code unique to each study.
core_id Core identification code unique to each site.
core_date Date of core collection. YYYY-MM-DD
core_latitude Positional latitude of the core in decimal degree WGS84. degree
core_longitude Positional longitude of the core in decimal degree WGS84. degree
core_position_method Code indicating how latitude and longitude were determined. handheld = Conventional Commercially available hand-held GPS 
core_position_notes Any relevant submitter generated notes on how latitude and longitude were determined.
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). estuarine = 0.5-35 ppt according to most definitions 
salinity_method Indicate whether salinity_class was determined using a field observation or a measurement 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. 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 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. 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 field observation = Inundation inferred by field observation such as vegetation 

vaughn_et_al_2020_depthseries_data , Soil core depthseries information


Physical: vaughn_et_al_2020_depthseries.csv
attribute name definition format, unit or codes
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.
site_id Site identification code unique to each study.
core_id Core identification code unique to each site.
depth_min Minimum depth of a sampling increment. centimeter
depth_max Maximum depth of a sampling increment. centimeter
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.
dry_bulk_density Dry mass per unit volume of a soil sample. This does not include ash free bulk density. gramsPerCubicCentimeter
fraction_carbon Mass of carbon relative to sample dry mass. dimensionless
cs137_activity Radioactivity counts per unit dry weight for radiocesium (137Cs). disintegrationPerMinutePerGram
cs137_activity_sd 1 standard deviation of uncertainty associated with cs137_activity. disintegrationPerMinutePerGram
total_pb210_activity Total radioactivity counts per unit dry weight for excess lead 210 (210Pb). disintegrationPerMinutePerGram
total_pb210_activity_sd 1 standard deviation of uncertainty associated with total_pb210_activity. disintegrationPerMinutePerGram
ra226_activity Total radioactivity counts per unit dry weight for Radium 226 (226Ra) if measured as part of the 210Pb dating process. disintegrationPerMinutePerGram
ra226_activity_sd 1 standard deviation of uncertainty associated with ra226_activity. disintegrationPerMinutePerGram
excess_pb210_activity Excess radioactivity counts per unit dry weight for excess lead 210 (210Pb). disintegrationPerMinutePerGram
excess_pb210_activity_sd 1 standard deviation of uncertainty associated with excess_pb210_activity. disintegrationPerMinutePerGram
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. dimensionless
CRS_model_age Age of soil at depth as determined by excess Pb-210 activity using the constant rate of supply (CRS) model nominalYear
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 nominalYear
carbon_nitrogen_ratio Molar ratio of total organic carbon to total nitrogen dimensionless
BACON_model_age Mean calibrated radiocarbon date using the age-depth BACON (Bayesian accumulation histories for deposits) calibration model nominalYear
BACON_model_age_min Minimum calibrated radiocarbon date using the age-depth BACON (Bayesian accumulation histories for deposits) calibration model nominalYear
BACON_model_age_max Maximum calibrated radiocarbon date using the age-depth BACON (Bayesian accumulation histories for deposits) calibration model nominalYear
total_lignin_l8 summation of vanillyl (V), syringyl (S), and cinnamyl (C) lignin phenols normalized to 100 mg of OC milligramsPerOneHundredMilligramsOrganicCarbon
lignin_l6 summation of V and S phenols normalized to 100 mg OC milligramsPerOneHundredMilligramsOrganicCarbon
CV_phenols_ratio ratio of C phenols to V phenols, used to estimate non-woody vs. woody vascular plant inputs dimensionless
SV_phenols_ratio ratio of S phenols to V phenols, used to estimate angiosperm vs. gymnosperm vascular plant inputs dimensionless
ad_al_vanillyls_ratio acid-to-aldehyde ratios of the vanillyl lignin phenol group, used as a degradation indicator dimensionless
ad_al_syringyls_ratio acid-to-aldehyde ratios of the syringyl lignin phenol group, used as a degradation indicator dimensionless
total_amino_acids summation of 19 amino acids that were detected and quantified, normalized to OC millimolesPerGramOrganicCarbon
fraction_amino_acids_nitrogen Fraction of which the 19 amino acids made of the total nitrogen pool dimensionless
degradation_index Amino acid degradation index generated from mole percentages of each amino acid in a principal component analysis dimensionless
DAPA_concentration Carbon-normalized concentration of the individual amino acid Diaminopimelic acid (DAPA) micromolesPerGramOrganicCarbon
GABA_concentration Carbon-normalized concentration of the individual amino acid gamma-aminobutyric acid (GABA) micromolesPerGramOrganicCarbon
Hyp_concentration Carbon-normalized concentration of the individual amino acid hydroxyproline (Hyp) micromolesPerGramOrganicCarbon
MurA_concentration Carbon-normalized concentration of the individual amino acid muramic acid (MurA) micromolesPerGramOrganicCarbon

Custom units

unit name parent SI unit unit type description
disintegrationPerMinutePerGram radionucleotideActivityPerMass disintegrations per minute per gram is a measure of the activity of the source of radioactivity
cubicCentimeter cubicMeter volume cubic centimeter
milligramsPerOneHundredMilligramsOrganicCarbon ligninSummationNormalizedToOrganicCarbon summation of measured object normalized to 100 mg organic carbon
millimolesPerGramOrganicCarbon amountOfSubstanceConcentration Concentration normalized to 1 g organic carbon
micromolesPerGramOrganicCarbon amountOfSubstanceConcentration Concentration normalized to 1 g organic carbon

Other entities

Intellectual Rights

This dataset is listed under a Creative Commons BY 4.0 and can be used with attribution. https://creativecommons.org/licenses/by/4.0/