Data Package Metadata View Summary

Tree Rings, Avon Hills Scientific and Natural Area

General Information

Data Package:
Local Identifier:	msb-paleon.35.0
Title:	Tree Rings, Avon Hills Scientific and Natural Area
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	Both increases in temperature and changes in precipitation may limit future tree growth, but rising atmospheric CO2 could offset some of these stressors through increased plant Water Use Efficiency (WUE). The net balance between the negative impacts of climate change and positive effects of CO2on tree growth will be most important for systems already at plant physiological limits, where increased climate stress could drive mortality and shifts in range distribution. Here, we quantify the effects of climate, stand structure, and rising CO2on both annual tree-ring growth increment and WUE at a savanna-forest boundary in the Upper Midwest United States. Taking a Bayesian hierarchical modelling approach, we find that plant WUE increased by ~13-25% over the course of the 20thcentury, but on average, tree-ring growth increments do not significantly increase. Consistent with higher WUE under increased CO2 and recent wetting, we observe a decrease in sensitivity of tree growth to annual precipitation, leading to 25-65% higher growth under dry conditions compared to trees of similar age and size in the past. However, an emerging interaction between summer maximum temperatures and annual precipitation diminishes the water-savings benefit under hot and dry conditions. Both the decrease in precipitation sensitivity, and the interaction between temperature and precipitation are strongest in open canopy microclimates, suggesting that stand structure may modulate response to future changes. Overall, we find that while higher WUE may provide some water savings benefits to growth under normal drought conditions, near-term future temperature increases combined with drought events could drive growth declines of over 50%. These products are used in the manucript, Heilman et al., 2020, Increased water use efficiency leads to decreased precipitation sensitivity of tree growth, but is offset by high temperatures. Submitted for review. The tree rings in this data package and those in msb-paleon packages 36-43 correspond with the isotope data in msb-paleon package 34. This material is based upon work supported by the National Science Foundation under grants #DEB-1241874, 1241868, 1241870, 1241851, 1241891, 1241846, 1241856, 1241930.

Time Period

Begin:

2016

End:

2019

People and Organizations
Contact:	Peters, Jody (University of Notre Dame)
Contact:	McLachlan, Jason (University of Notre Dame)
Creator:	Heilman, Kelly (University of Arizona)

Data Entities
Data Table Name:	AVOww.csv
Description:	Wholewood tree ring measurements from Avon Hills Scientific and Natural Area, MN
Data Table Name:	AVO_full_xy.csv
Description:	Plot-level attributes and tree ring data for Avon Hills Scientific and Natural Area, MN
Other Name:	AvonTreeRing_cofecha.zip
Description:	Cofecha crossdating output text files for all measured trees at Avon Hills Scientific and Natural Area, MN. We include all the measured time series in these files, but filter out cores with low correlations to a master chronology within the code for the analysis.

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/msb-paleon/35/0/6151007fca54f2b8561ebb8467e2a422
Name:	AVOww.csv
Description:	Wholewood tree ring measurements from Avon Hills Scientific and Natural Area, MN
Number of Records:	567
Number of Columns:	3

Table Structure

Object Name:

AVOww.csv

Size:

12105 byte

Text Format:

Number of Header Lines:

Record Delimiter:

#x0A

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

year

full_tellervo

RingWidth

Definition:

year of the ring width

tree ID that matches the full_tellervo column in the plot-level metadata in this data package

ring width of that year

Storage Type:

Measurement Type:

ratio

nominal

ratio

Measurement Values Domain:

Unit	nominalYear
Type	natural

Definition

tree ID

Unit	millimeter
Type	real

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/msb-paleon/35/0/e44d34fff5036d4eb4a3d9020cdd964f
Name:	AVO_full_xy.csv
Description:	Plot-level attributes and tree ring data for Avon Hills Scientific and Natural Area, MN
Number of Records:	35
Number of Columns:	16

Table Structure

Object Name:

AVO_full_xy.csv

Size:

5286 byte

Text Format:

Number of Header Lines:

Record Delimiter:

#x0A

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Row ID

Species_common

short

full_tellervo

name

Year_cored

TagID

Core

DBH

ele

x_plot

y_plot

x_tree

y_tree

Species

SpecCode

Definition:

This is the rowID automatically added when using R to save the csv file.

Common species name

Short, unique tree ID assigned to the individual tree (can have multiple cores that have the same Short tree ID, if we took multiple cores from that tree)

Full tellervo ID assigned to the individual cores

Site name

Year trees were cored for this plot

Number on the metal tree tag attached to the tree these cores came from at this site

Number of cores taken from this tree

Diameter at Breast Height in centimeters

Elevation recorded (note some of the GPS points did not record elevation, so this may be NA)

X coordinate of the plot center, in meters (using Great Lakes Albers projection EPSG:3175)

Y coordinate of the plot center, in meters (using Great Lakes Albers projection EPSG:3175)

X coordinate of the tree, in meters (using Great Lakes Albers projection EPSG:3175)

Y coordinate of the tree, in meters (using Great Lakes Albers projection EPSG:3175)

Full species scientific name

Four letter species code

Storage Type:

Measurement Type:

ratio

nominal

ratio

nominal

Measurement Values Domain:

Unit	dimensionless
Type	natural

Definition

Common species name

Definition

Tree ID

Definition

Tellervo ID

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	AVO
Definition	Avon Hills Scientific and Natural Area, MN
Source

Unit	nominalYear
Type	natural

Unit	dimensionless
Type	natural

Unit	dimensionless
Type	natural

Unit	centimeter
Type	real

Unit	meter
Type	real

Unit	degree
Type	real

Unit	degree
Type	real

Unit	degree
Type	real

Unit	degree
Type	real

Definition

Full species scientific name

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	POTR
Definition	Populus tremuloides
Source

Code Definition

Code	TIAM
Definition	Tilia Americana
Source

Code Definition

Code	FRPE
Definition	Fraxinus pennsylvanica
Source

Code Definition

Code	OSVI
Definition	Ostrya virginiana
Source

Code Definition

Code	QURU
Definition	Quercus rubra
Source

Code Definition

Code	ACSA
Definition	Acer saccharum
Source

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

AvonTreeRing_cofecha.zip

Entity Type:

cofecha output file

Description:

Cofecha crossdating output text files for all measured trees at Avon Hills Scientific and Natural Area, MN. We include all the measured time series in these files, but filter out cores with low correlations to a master chronology within the code for the analysis.

Physical Structure Description:

Object Name:

AvonTreeRing_cofecha.zip

Compression Method:

zip

Externally Defined Format:

Format Name:

cofecha output file

Data:

https://pasta-s.lternet.edu/package/data/eml/msb-paleon/35/0/a63022d9fb96c2194c9d388fd7eea6ba

Data Package Usage Rights

PalEON uses the CC-BY 4.0 (Creative Commons Attribution 4.0 International) License for data products that get archived on NIS or elsewhere. Details of this license can be found here: https://creativecommons.org/licenses/by/4.0/legalcode

Keywords

By Thesaurus:
(No thesaurus)	Water Use Efficiency, Forest, Savanna, Tree growth, climate sensitivity, CO2, d13C

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

Our study region spans the savanna-forest boundary in the Upper Midwest of North America.We sampled tree cores from sites across a historic sharp boundary between open savanna and closed forest ecosystems.

Tree ring growth Sampling strategy We aim to determine if stand structure drives diverse responses to either climate or elevated CO2. Thus, we selected both closed forest and open savanna sample sites across the savanna-forest boundary region. Where possible, we made efforts to spatially pair savanna sites with close forest sites, to limit climatic differences across sites. Here we report tree ring widths across 9 sites (5 savanna and 4 closed forest) that fit our full sampling criteria. Sites are situated along an increasing moisture gradient from West to East, spanning mean annual precipitations from 577 to 873 mm (95% CI = 372 – 1178 mm). Sites also vary along a North to South summer maximum temperature gradient spanning ~24.1 - 26.8 °C (95% CI = 21 – 30 °C). Within each site, we sampled 1-3 trees cores from trees >3cm DBH and censused all trees within a 15-meter radius plot. By sampling most trees in the plot, we minimize sampling biases associated with tree age, and capture an ecologically realistic range of tree-growth responses to climate.

Tree-growth measurements and crossdating Cores were dried, mounted with hide glue, sanded, and first visually crossdated to ensure correct dating of the annual rings. We measured earlywood and latewood ring widths of all Quercus spp. to the nearest micrometer using a Velmex measuring station and Tellervo Software. Whole-wood ring widths were statistically crossdated using COFECHA, and site-level summary statistics calculated using DPLR package.

Additional details can be found in the methods sections in: Heilman et al., 2020,Increased water use efficiency leads to decreased precipitation sensitivity of tree growth, but is offset by high temperatures. Submitted for review. Code for the data processing and analyses can be found on GitHub: https://github.com/Kah5/TreeRings

People and Organizations

Creators:

Individual:	Dr. Kelly Heilman
Organization:	University of Arizona

Contacts:

Individual:	Dr. Jody Peters
Organization:	University of Notre Dame

Individual:	Dr. Jason McLachlan
Organization:	University of Notre Dame

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2016

End:

2019

Sampling Site:

Description:

Avon Hills Scientific and Natural Area, MN

Site Coordinates:

Longitude (degree):

-93.695

Latitude (degree):

45.42

Taxonomic Range:

Classification:

Rank Name:

Genus

Rank Value:

Populus

Classification:

Rank Name:	Species
Rank Value:	tremuloides
Common Name:	Aspen

Classification:

Rank Name:

Genus

Rank Value:

Tilia

Classification:

Rank Name:	Species
Rank Value:	americana
Common Name:	Basswood

Classification:

Rank Name:

Genus

Rank Value:

Fraxinus

Classification:

Rank Name:	Species
Rank Value:	pennsylvanica
Common Name:	Green ash

Classification:

Rank Name:

Genus

Rank Value:

Ostrya

Classification:

Rank Name:	Species
Rank Value:	virginiana
Common Name:	Ironwood

Classification:

Rank Name:

Genus

Rank Value:

Quercus

Classification:

Rank Name:	Species
Rank Value:	rubra
Common Name:	Red Oak

Classification:

Rank Name:

Genus

Rank Value:

Acer

Classification:

Rank Name:	Species
Rank Value:	saccharum
Common Name:	Maple

Project

Parent Project Information:

Title:

Paleo-ecological Observatory Network (PalEON)

Personnel:

Individual:

Jason McLachlan

Address:

100 Galvin Life Sciences,

Notre Dame, IN 46615 USA

Phone:

(574) 631 1850 (voice)

Email Address:

jmclachl@nd.edu

Role:

Lead PI

Individual:

Jody Peters

Address:

100 Galvin Life Sciences,

Notre Dame, IN 46615 USA

Email Address:

peters.63@nd.edu

Role:

Co - Information Manager

Abstract:

PalEON (the PaleoEcological Observatory Network) is an interdisciplinary team of paleoecologists, ecological statisticians, and ecosystem modelers. Our goal is to reconstruct forest composition, fire regime, and climate in forests across the northeastern US and Alaska over the past 2000 years and then use this to drive and validate terrestrial ecosystem models. We will develop a coherent spatiotemporal inference framework to quantify trends and extreme events in paleoecological and paleoclimatic time series. Variables such as forest composition, fire regime, and moisture balance will be inferred from corresponding paleoecological proxies, with rigorous estimates of uncertainty.

These datasets will be applied to improve terrestrial ecosystem models in two contexts. First, we are developing specific data products, such as high- resolution settlement-era forest composition maps from witness tree and General Land Office data, that can be used to drive ecosystem models. PalEON will develop formal data assimilation tools that will allow the models we use to forecast on centennial scales to be informed by decadal- to centennial-scale data. Second, are developing data products for the purpose of model validation (e.g. fire-frequency reconstructions from sedimentary charcoal data). These long-term validation datasets will help us assess the ability of these models to capture past dynamics correctly, and will help us understand why their future projections are so divergent.

Funding:

This material is based upon work supported by the National Science Foundation under Grants #DEB-1241874, 1241868, 1241870, 1241851, 1241891, 1241846, 1241856, 1241930. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'description'
        |     |     |___text '\nPublications: Heilman et al., 2020, Increased water use efficiency leads to decreased precipitation sensitivity of tree growth, but is offset by high temperatures. Submitted for review. Code for the data processing and analyses can be found on GitHub: https://github.com/Kah5/TreeRings.\n'
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

Tree Rings, Avon Hills Scientific and Natural Area

Data Entities

Data Table

Data Table

Non-Categorized Data Resource

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Tree Rings, Avon Hills Scientific and Natural Area

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These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

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People and Organizations

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Project

Additional Metadata