Is there tree senescence? The fecundity evidence Article Swipe

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Fecundity Biology Senescence Longevity Ecology Reproduction Demography Zoology Evolutionary biology Population Genetics Sociology

Tong Qiu , Marie‐Claire Aravena Acuña , Robert A. Andrus , Davide Ascoli , Yves Bergeron , Roberta Berretti , Michał Bogdziewicz , Thomas Boivin , Raúl Bonal , Thomas Caignard , Rafael Calama , J. Julio Camarero , Connie J. Clark , Benoı̂t Courbaud , Sylvain Delzon , Sergio Donoso Calderón , William Farfán-Ríos , Catherine A. Gehring , Gregory S. Gilbert , Cathryn H. Greenberg , Qinfeng Guo , Janneke Hille Ris Lambers , Kazuhiko Hoshizaki , Inés Ibáñez , Valentin Journé , Christopher L. Kilner , Richard K. Kobe , Walter D. Koenig , Georges Künstler , Jalene M. LaMontagne , Mateusz Ledwoń , James A. Lutz , Renzo Motta , Jonathan A. Myers , Thomas A. Nagel , Chase L. Núñez , Ian S. Pearse , Łukasz Piechnik , John R. Poulsen , Renata Poulton‐Kamakura , Miranda D. Redmond , Chantal D. Reid , Kyle C. Rodman , C. Lane Scher , Harald Schmidt Van Marle , Barbara Seget , Shubhi Sharma , Miles R. Silman , Jennifer J. Swenson , Margaret Swift , María Uriarte , Giorgio Vacchiano , Thomas T. Veblen , Amy V. Whipple , Thomas G. Whitham , Andreas P. Wion , S. Joseph Wright‬ , Kai Zhu , Jess K. Zimmerman , Magdalena Żywiec , James S. Clark ·

YOU? · · 2021 · Open Access · · DOI: https://doi.org/10.1073/pnas.2106130118 · OA: W3195828329

Significance Physiological decline in large, old trees could involve diminished reproductive effort, but evidence is lacking. A global analysis finds that fecundity decline in large trees is pervasive, consistent with physiological decline, thus providing new evidence for tree senescence. For the 20% of species not showing fecundity declines, this lack of evidence was linked not to specific species groups, but rather to lack of large trees in the data. Large trees remain important for their structural attributes, but results highlight the critical role of intermediate trees for their contribution to reproduction.