Here you will find links to tree-ring organizations & consortia, links to helpful books, links to tree-ring journals, and a variety of general tree-ring education tools & sites.
Tree-ring Organizations & Dendro Affiliates
Tree-Ring Society (TRS) is a non-profit international scientific association dedicated to dendrochronological research and education.
The goals of TRS are to:
Promote tree-ring research and career development for the global dendrochronology community
Provide a forum for communication by supporting the regular organization of international conferences, workshops, and fieldweeks.
Publish peer-reviewed dendrochronological studies in our journal Tree-Ring Research
Disseminate knowledge about dendrochronology to other disciplines and to the public
Association for Tree-Ring Research (ATR)
The Association for Tree-Ring Research (ATR) is an international scientific organization that aims to promote tree-ring research, education and public outreach. The ATR seeks to foster research projects, to build bridges, and to facilitate knowledge exchange between the different scientific disciplines working with tree rings and associated fields of science (e.g., forestry, archaeology, global change ecology). The Association has a strong commitment to disseminate knowledge about dendrochronology to the general public, and to strengthen the policy-science dialogue.
Objectives of the IAWA:
to create awareness of the place of wood anatomy in science, technology and conservation of natural resources, for the public good;
to exchange ideas and information through correspondence and meetings;
to facilitate collection, storage and exchange of research materials;
to provide rational bases for the consistent use of terminology in descriptions of wood and bark, and to cooperate with others having similar aims in other related fields of plant anatomy;
to stimulate the publication of scientific articles on wood anatomy and related fields (including bark anatomy, "woody" monocotyledons);
to encourage and assist the study and teaching of wood anatomy and related fields;
to promote research in wood anatomy and related fields and to engage in any other activity consistent with the objectives of the Association.
I-BIND is an international consortium of tree-ring scientists who focus on the application and improvement of the BI (Blue Intensity) method for dendrochronology.
To promote the methods of BI generation of Tree-Ring Laboratories around the globe and encourage standard protocols and best practice
To encourage the further development of the BI methodology through workshops and collaboration
To encourage collaboration for the creation of regional networks of BI chronologies – not just from temperature limited woodland locations, but also from more moisture stressed limited sites at low elevations/latitudes.
To explore the utilisation of BI for historical dating and dendro-provenancing
NADEF provides an intensive learning experience in dendrochronology. Previous experience in field or laboratory-based tree-ring techniques is not required. Participants range from new initiates in the field to seasoned veterans with over 20+ years of experience. Group leaders of the fieldweek are among the top scientists in their respective fields of study as related to global environmental change. Because the topic groups vary from year to year, we have many repeat attendees, in addition to first-comers.
TRACE, which is an abbreviation for Tree Rings in Archaeology, Climatology and Ecology, is the annual meeting of the Association for Tree-Ring Research. Since 2002, when the first meeting took place, the international conference was held throughout Europe. TRACE 2022 will take place in Erlangen, Germany, from May 24 – 27, 2022. For more information, check the conference website www.trace2022.com.
The Ancient Cross Timbers Consortium has been established to unite educational institutions, government agencies, conservation organizations, and individuals around the research, educational, and conservation opportunities presented by the extensive old-growth forest remnants in this ecosystem. The Consortium has organized a unique network of cooperative research natural areas in ancient Cross Timbers remnants extending across 700 miles from southeastern Kansas to southern Texas.
The Ancient Bald Cypress Consortium (ABCC) unites educational institutions, government agencies, conservation organizations, private landowners, and individuals to accurately map and protect all remaining ancient bald cypress wetlands for research, education, and conservation.
The Oak Woodlands & Forests Fire Consortium is an exchange for fire science information. Funded by the Joint Fire Science Program, our goal is to increase the availability and consideration of credible fire science information to those making land management decisions.
The ShrubHub is a research network of 125+ scientists investigating changes in woody vegetation in Arctic and alpine tundra ecosystems. This network was established to foster communication between researchers working in tundra ecosystems around the Arctic and to promote data synthesis.
ShrubringHub: GitHub repository for the ShrubHub growth ring database.
Purpose: We combined individual datasets of shrub growth from sites around the tundra biome to explore the climate sensitivity of shrub growth.
Abstract: This dataset consists of tundra shrub growth data from 37 arctic and alpine sites in 9 countries, including 25 species, and ~42 000 annual growth records from 1821 individuals.
The Joint Fire Science Program funds scientific research on wildland fires and distributes results to help policymakers, fire managers and practitioners make sound decisions.
FRAMES strives to provide a convenient, systematic exchange of information and technology within the wildland fire research and management community.
Forest Ecosystem Monitoring Collective | The Dendroecological Network (DEN)
The mission of the DendroEcological Network (DEN) is to provide an online repository for dendrochronological and associated forest ecology data, as well as offer a cyberinfrastructure for the discovery, exploration, and sharing of that data. The data portal is publicly available and anyone with access to the internet can use it and contribute to it. To maintain the rigor of the overall resource, the DEN is currently limited to only accept datasets containing cores that were cross-dated.
The UK Oak Project is an inter-disciplinary project investigating the physical and chemical properties of oak tree-rings to advance science-based dating in archaeology and the study of past, contemporary and future climatic change.
The research team comprises scientists from the Department of Geography, Swansea University and the University of Oxford's Research Laboratory for Archaeology and the History of Art.
FireScience.gov is your one-stop source to access fire science information, resources and funding announcements for scientists, fire practitioners and decision makers.
We are committed to improving your access to fire science information. On this site, you can:
Apply for funding
Read summaries of research to stay up-to-date
Register for events like conferences and webinars
Connect with scientists and managers in your area through our Fire Science Exchange Network
Indigenous Peoples Burning Network
The Indigenous Peoples Burning Network (IPBN) is a support network among Native American communities that are revitalizing their traditional fire practices in a contemporary context. Since time immemorial indigenous people have been using refined fire practices to care for landscapes in what is now the U.S. Although most fires today are managed by non-tribal governments, indigenous knowledge-holders are vital partners in advancing forest resilience and hazardous fuel reduction. The IPBN is unique—in its leadership by Native American elders and practitioners, and in its focus on revitalizing traditional fire cultures to help solve today’s fire problems.
The Cultural Burning Knowledge Hub is a place to find information about how
Traditional Owners use fire in the landscape.
The Hub provides links to a range of documents, websites, organisations and events.
Eastern Alpine and Dinaric Society for Vegetation Ecology was established in 1960 with an aim to stimulate the cross-border cooperation for studies of vegetation. The society organises meetings every second year. The meeting is not opened only to members, but also to other researches interested in flora and vegetation of the region.
NFZ.forestnet is a European research and higher education network which gathers French, German and Swiss institutions working on forestry, forest ecosystem and forest-related products. It aims at creating and developing collaborative research and education projects.
NFZ.forestnet was created in 2006. The network is composed of 7 institutions, universities and research centres, in Nancy, Freiburg, and Zurich. All in all, 700 researchers and professors work in NFZ.forestnet member institutions.
IUFRO is a non-profit, non-governmental international network of forest scientists, which promotes global cooperation in forest-related research and enhances the understanding of the ecological, economic and social aspects of forests and trees. IUFRO is "the" global network for forest science cooperation. It unites more than 15,000 scientists in around 650 Member Organizations in over 125 countries, and is a member of ICSU. Scientists cooperate in IUFRO on a voluntary basis. More about IUFRO
Biologisch-Archaeologisch Platform is an independent platform of biological-archaeological specialists in archaeology. The BAP promotes research, education, communication and integration of biological-archaeological research within archaeology.
The BAP also actively participates in the renewal of the archaeological system and the discussion about certification and the role of bio-archaeological specialties within certification. Together with SAMPL (the platform for specialists in archaeological material), BAP has a seat in the Central College of Experts in Archaeology (CCvD). The BAP also takes an active part in the Groot Reuvens consultation.
In accordance with the decision of the former Inter-Agency Task Force for Disaster Reduction (IATF/DR) of the UN International Strategy for Disaster Reduction (UNISDR), the Global Wildland Fire Network (GWFN) and the UNISDR Wildland Fire Advisory Group (WFAG) were created in 2004 under the auspices of UNISDR. The GWFN provides an umbrella of 14 independent Regional Wildland Fire Networks of different / individual origins and mandates. Its mission is to:
Reduce the negative impacts of landscape fires on the environment and humanity
Advance the knowledge and application of the ecologically and environmentally benign role of natural fire in fire-dependent ecosystems, and sustainable application of fire in land-use systems.
Databases & Links
The World Data Service for Paleoclimatology manages the International Tree-Ring Data Bank (ITRDB), the world's largest public archive of tree ring data. Oversight is provided by the ITRDB Advisory Committee. The ITRDB includes raw ring width, wood density, isotope measurements, and site growth index chronologies from more than 5,000 sites on six continents. Reconstructed climate parameters are also available for some areas.
Dendrochronology studies the annually varying ring widths in wood. Tree-ring patterns in wood from the cultural heritage contain unique information about former chronology, social economy, the historical landscape and its uses, climate and wood technology. The DCCD is a digital repository and interactive library of tree-ring data. Its content is developed through research of, among others: archaeological sites (including old landscapes), ship wrecks, buildings, furniture, paintings, sculptures and musical instruments. The DCCD is based on the Tree-Ring Data Standard (TRiDaS) and allows for conversion of other widely-used data formats. It contains digital tree-ring measurement series and average chronologies, as well as their descriptive and interpretative metadata. It allows contributors to control and manage access to their data.
The International Multiproxy Paleofire Database (IMPD) is an archive of fire history data derived from natural proxies such as tree scars and charcoal and sediment records. The IMPD was established with guidance from an advisory board to provide a permanent repository for high-quality paleofire records from around the world. For more information about paleofire data, see our Introduction to Fire History Reconstruction.
We are the Nation’s (USA) leading authority for environmental data, and manage one of the largest archives of atmospheric, coastal, geophysical, and oceanic research in the world. NCEI contributes to the NESDIS mission by developing new products and services that span the science disciplines and enable better data discovery.
This online glossary is adapted from the Multilingual Glossary of Dendrochronology (1995). It contains the definition and translation of 351 terms in 7 languages: English, German, French, Spanish, Italian, Portuguese and Russian.
Monitoring Trends in Burn Severity (MTBS) is a multiagency program designed to consistently map the burn severity and perimeters of fires across all lands of the United States from 1984 and beyond.
Paleoclimatology data are derived from natural sources such as tree rings, ice cores, corals, stalagmites, and ocean and lake sediments. These proxy climate data extend the weather and climate information archive by hundreds to millions of years. The data include geophysical or biological measurement time series and some reconstructed climate variables such as temperature and precipitation. Scientists use paleoclimatology data and information to understand natural climate variability and future climate change.
Welcome to the TRiDaS website where you can find information about the international community-wide effort to produce a universal data standard for the dendrochronological data. An article describing the standard was published in Dendrochronologia and is available through Science Direct. You can also browse the TRiDaS documentation to find out more.
OldList is a database of ancient trees. Its purpose is to identify maximum ages that different species in different localities may attain such that exceptionally old age individuals are recognized. In addition to this original OldList, Neil Pederson at Harvard Forest and colleagues at the Virginia Tech Tree Program maintain a companion Eastern OldList, focused on old trees growing in the eastern United States.
Welcome to the Gymnosperm Database, the web's premier source of information on conifers and their allies. Since we went online on 1997, the Database has attracted worldwide attention as a readily accessible, scientifically accurate source of information on the classification, description, ecology and uses of this culturally and ecologically important group of plants.
This database of dendrochonologically relevant plant species currently contains the names of 1,166 tree and shrub species for which tree rings have been analyzed in the published literature. The database provides ITRDB codes for tree species.
The following information is given for each species or variety: Latin name and authority, common name(s) in English and/or local non-European names. For approx. seven hundred species with tree-ring data and chronologies available in the International Tree-Ring Data Bank (ITRDB), additional information include:
The Crossdating Index (CDI), where
"0" indicates the species does not crossdate, or no crossdating information is available
"1" indicates a species known to crossdate within and between trees (minor importance to dendrochronology)
"2" indicates a species known to crossdate across a region (major importance to dendrochronology).
*Please note that as of February 17, 2022 the database had not been updated since 2013.
The Tree Mortality Network is an initiative of the IUFRO task force on tree mortality. Our mission is to facilitate collaboration between scientists to combine expertise, knowledge and data, thereby allowing a global assessment of tree mortality and providing crucial information for forest managers and policymaking.
The European Atlas of Forest Tree Species is the first comprehensive publication of such a unique and essential environmental resource, that is, our trees. Leading scientists and forestry professionals have contributed in the many stages of the production of this atlas, through the collection of ground data on the location of tree species, elaboration of the distribution and suitability maps, production of the photographic material and compilation of the different chapters.
The main European added value of the ESBN has been the joint effort towards bringing together soil information collected in separate European countries, using very different methodologies, standards and scientific backgrounds, into one single geographic information system (GIS) while demonstrating that, at least for soil science, a “Europe without borders” is possible. Lengthy cross-border harmonisation sessions between bordering countries have resulted in a common fully harmonised soil geographical database of Europe at a nominal scale of 1:1,000,000. This database has allowed the production of the maps that are at the heart of the new “Soil Atlas of Europe".
An online flora of all known plants, supporting the Global Strategy for Plant Conservation. 1,325,388 names, 350,595 from accepted species, 56,408 images, 138,663 names with descriptions, 32,566 with distributions and 1,153,631 with references.
The Wood Database contains around 600 species currently, which only represents about 1/4 of the database's creator's, Eric Meier, total collection! Eric's book, The Wood Dictionary: From Acacia to Ziricote, A Guide to the World's Wood is also available.
FloraVeg.EU is an online database of European flora and vegetation data prepared for various projects of the Vegetation Science Group, Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic. Most of the datasets were created in collaboration with partners from the European Vegetation Survey Working Group of the International Association for Vegetation Science. It uses the Pladias database platform developed in collaboration with the Institute of Botany of the Czech Academy of Sciences.
The Flora part of the database focuses on native and naturalized flora occurring in Europe. Cultivated plants are not within the scope of the database, although the most commonly cultivated crops and woody plants are included. Taxon concepts and nomenclature largely follow the Euro+Med PlantBase. Species are characterized by their biological traits, origin, ecological indicator values and their occurrence in habitat and vegetation types.
Welcome to ITIS, the Integrated Taxonomic Information System! Here you will find authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world. We are a partnership of U.S., Canadian, and Mexican agencies (ITIS-North America); other organizations; and taxonomic specialists. ITIS is also a partner of Species 2000 and the Global Biodiversity Information Facility (GBIF). The ITIS and Species 2000 Catalogue of Life (CoL) partnership is proud to provide the taxonomic backbone to the Encyclopedia of Life (EOL).
TreeFlow is a comprehensive web resource for tree-ring reconstructions of streamflow and climate, providing easy access to reconstruction data as well as information about how the data were developed and can be used.
InciWeb is an interagency all-risk incident information management system. The system was developed with two primary missions:
Provide the public a single source of incident related information
Provide a standardized reporting tool for the Public Affairs community
Learn how to use and navigate around InciWeb with this support guide.
A number of supporting systems automate the delivery of incident information to remote sources. This ensures that the information regarding active incidents is consistent, and the delivery is timely.
The Fire and Smoke Map displays information on ground level air quality monitors recording fine particulates (PM2.5) from smoke and other sources, as well as information on fires, smoke plume locations, and special statements about smoke issued by various sources.
This map is designed to:
Allow the user to browse current conditions
Show information relevant to the current location or another location of interest
This page provides links to the most recent versions of tools produced by the U.S. Forest Service PNW Research Station's Pacific Wildland Fire Sciences Laboratory in support of the Wildland Fire Air Quality Response Program and wildland fire operations.
The Interagency Wildland Fire Air Quality Response Program (IWFAQRP) was created to directly assess, communicate, and address risks posed by wildland fire smoke to the public as well as fire personnel. The program depends on four primary components: specially trained personnel called Air Resource Advisors, air quality monitoring, smoke concentration and dispersion modeling, and coordination and cooperation with agency partners.
The geospatial products described and distributed here depict the probability of high-severity fire, if a fire were to occur, for several ecoregions in the contiguous western US.
Users of these data should thoroughly read the README [pdf] file to better understand appropriate uses and interpretations of the data products distributed here.
To cite these data, please see:
Parks SA, Holsinger LM, Panunto MH, Jolly WM, Dobrowski SZ, and Dillon GK. 2018. High-severity fire: evaluating its key drivers and mapping its probability across western US forests. Environmental Research Letters. 13: 044037.
Access wildfire data, live feeds, technology, and resources from esri. Use this collection of map layers, live data feeds, maps, organizations, blog posts, and how-to guides to help plan and manage your wildfire response.
We manage approximately 150,000 citations on all the topics related to wildland fire, including prescribed burning, smoke, climate change, paleofires, wildlife and invertebrates, and fire history, to name a few of the topics we cover. We have set up our site so that you can search and download documents without charge.
Welcome to the online edition of The World List of Cycads (WLoC), a comprehensive taxonomic reference for cycad taxonomy, nomenclature, biology, and literature. The WLoC is produced under the auspices of the IUCN/SSC Cycad Specialist Group (CSG). The online edition is hosted and sponsored by Montgomery Botanical Center.
Plant List of Accepted Nomenclature, Taxonomy, and Symbols
The PLANTS Database provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories.
The Global Historical Climatology Network daily (GHCNd) is an integrated database of daily climate summaries from land surface stations across the globe. GHCNd is made up of daily climate records from numerous sources that have been integrated and subjected to a common suite of quality assurance reviews.
GHCNd contains records from more than 100,000 stations in 180 countries and territories. NCEI provides numerous daily variables, including maximum and minimum temperature, total daily precipitation, snowfall, and snow depth. About half the stations only report precipitation. Both record length and period of record vary by station and cover intervals ranging from less than a year to more than 175 years.
DendroElevator is an open-source web platform for tree-ring image curation, visualization, and analysis. The system is optimized to maximize access to gigapixel images of tree rings and related paleoenvironmental proxy datatypes for remote research and distanced collaboration.
DendroElevator features a browser-based toolkit for tree-ring image visualization and time series measurement built for Elevator, a cloud-hosted digital asset management software with curation and robust streaming capabilities for file types of any size and common 2D and 3D formats, plus adaptability for various metadata and access permissions schemas.
DendroElevator constitutes an initial realization of our vision to create an open source, easily accessible online repository of high quality tree-ring imagery for entire collections of specimens. More information is here.
Welcome to the home of openDendro -- an open-source framework of the base analytic software tools used in dendrochronology in both the R and Python programming languages. Our goal is to create and curate a unified set of critical tools in open-source environments that will provide the necessary baseline for researchers using tree-ring data to adopt open-science practices and increase both rigor and transparency in dendrochronology.
N-TREND is a mainly tree-ring community driven initiative to bring together dendroclimatologists to identify a collective strategy to improve large-scale reconstructions of summer temperatures from new and existing tree-ring archives.
The Building Archaeology Research Database (BARD) has been designed as an easy to use and accessible summary index for both published and unpublished building records. It’s main aim is to encourage involvement in building archaeology and its current 23,000+ records (including many tree-ring dated buildings) can be freely searched on-line.
BARD is a primarily an on-line scientific research tool showing how building styles developed through time and across regions.
BARD currently contains over 2500 tree-ring dated buildings and key features of timber-framing such as crucks, crown posts, wealdens, queen posts, etc can be selected and plotted.
BARD provides systematic recording system for buildings that also helps to narrow down the likely date of construction.
General Tree-Ring Books & Other Interesting General Ecology Books
Finding the Mother Tree: Discovering the Wisdom of the Forest - Suzanne Simard (2021)
The Bristlecone Book: A Natural History of the World's Oldest Trees - Ronald M. Lanner (2007)
The Woodbook - Romeyn B. Hough, Klaus U. Leistikow (2002)
Technical Tree-Ring Books
- Stable Isotopes in Tree Rings: Inferring Physiological, Climatic and Environmental Responses - Rolf T. W. Siegwolf, J. Renée Brooks, John Roden, Matthias Saurer (free pdf version) (2022)
Dendroecology: Principles and Practice - Richard Phipps & Thomas Yanosky (2020)
Dendroecology: Tree-Ring Analyses Applied to Ecological Studies - Mariano M. Amoroso, Lori D. Daniels, Patrick J. Baker, J. Julio Camarero (2017)
Dendroclimatic Studies: Tree Growth and Climate Change in Northern Forests - Rosanne D'Arrigo, Nicole Davi, Gordon Jacoby, Rob Wilson, Greg Wiles (2014)
Dendroclimatology: Progress and Prospects (Developments in Paleoenvironmental Research, 11) - Malcolm K. Hughes, Thomas W. Swetnam, Henry F. Diaz (2012)