Anatomical distribution of starch in the stemwood influences carbon dynamics and suggests storage‐growth trade‐offs in some tropical trees

作者：David Herrera‐Ramírez, Henrik A. Hartmann, Christine Römermann, Susan Trumbore, Jan Muhr, Leonardo Maracahipes‐Santos, Paulo Monteiro Brando, Divino Vicente Silvério, Jianbei Huang, Iris Kuhlmann, Carlos Alberto Miranda Sierra · 发表于：Journal of Ecology · 年份：2023 · DOI：10.1111/1365-2745.14209 · 被引用次数：23 · 研究领域：Forest ecology and management、Plant Water Relations and Carbon Dynamics、Ecology and Vegetation Dynamics Studies

Abstract Trees balance temporal asynchrony in carbon source and sink activity by accumulating and using non‐structural carbon (NSC). Previous work has demonstrated differences in the amount and distribution of NSC stored in stemwood in tropical tree species and related these patterns in NSC distribution to tree growth and mortality rates. However, we still do not know how changes in the amount and location of starch, a major component of NSC in stemwood, influence the seasonal carbon dynamics of mature trees and how this may reflect storage‐growth trade‐offs. In this work, we hypothesized that combining two life history traits, here leaf habit (evergreen/semi‐deciduous) and the anatomical distribution of starch within the stemwood (parenchyma storage and fibre storage), would allow us to explain differences in the seasonal interplay between carbon sources and sinks and the use and accumulation of starch in the tree stem. We expected semi‐deciduous/fibre‐storing species to have greater seasonal amplitudes of carbon source and sink activity, and therefore greater variation in starch content and stronger storage‐growth trade‐offs than evergreen/parenchyma‐storing species. We measured monthly increments in stem radial growth, soluble sugars and starch every 3 months during 2019 in Dacryodes microcarpa (semi‐deciduous/fibre‐storing species), Ocotea leucoxylon (evergreen/parenchyma‐storing species) and Sacoglottis guianensis (semi‐deciduous/parenchyma‐storing species). We found sea...