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Land management explains major trends in forest structure and composition over the last millennium in California's Klamath Mountains.

ABSTRACT: SignificanceWe provide the first assessment of aboveground live tree biomass in a mixed conifer forest over the late Holocene. The biomass record, coupled with local Native oral history and fire scar records, shows that Native burning practices, along with a natural lightning-based fire regime, promoted long-term stability of the forest structure and composition for at least 1 millennium in a California forest. This record demonstrates that climate alone cannot account for observed forest conditions. Instead, forests were also shaped by a regime of frequent fire, including intentional ignitions by Native people. This work suggests a large-scale intervention could be required to achieve the historical conditions that supported forest resiliency and reflected Indigenous influence.

SUBMITTER: Knight CA 

PROVIDER: S-EPMC8944927 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature

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Land management explains major trends in forest structure and composition over the last millennium in California's Klamath Mountains.

Knight Clarke A CA   Anderson Lysanna L   Bunting M Jane MJ   Champagne Marie M   Clayburn Rosie M RM   Crawford Jeffrey N JN   Klimaszewski-Patterson Anna A   Knapp Eric E EE   Lake Frank K FK   Mensing Scott A SA   Wahl David D   Wanket James J   Watts-Tobin Alex A   Potts Matthew D MD   Battles John J JJ  

Proceedings of the National Academy of Sciences of the United States of America 20220314 12

SignificanceWe provide the first assessment of aboveground live tree biomass in a mixed conifer forest over the late Holocene. The biomass record, coupled with local Native oral history and fire scar records, shows that Native burning practices, along with a natural lightning-based fire regime, promoted long-term stability of the forest structure and composition for at least 1 millennium in a California forest. This record demonstrates that climate alone cannot account for observed forest condit  ...[more]

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