Evaluating Sphagnum traits in the context of resource economics and optimal partitioning theories

Trade-offs between key aspects of plant performance such as resource acquisition and allocation underpin several trait-based theories that have been derived for vascular plants. However, due to difficulty in quantifying traits in nonvascular plants, our theoretical understanding of how traits govern the physiological and ecological preferences of nonvascular plant species is quite limited. Here, we used the resource economics theory (RET) and optimal partitioning theory (OPT) to evaluate functional traits in mosses. We evaluated aspects of these theories in two common but ecologically different Sphagnum moss species. We used a suite of morpho-physiological traits across a range of environmental treatments to test whether Sphagnum is capable of functional tissue partitioning and whether the two Sphagnum species studied conform to a fast or slow strategy often observed in vascular plants. Consistent with the predictions of RET, the fast-growing species maintained a faster growth rate and ...植物性能关键维度（如资源获取与分配）之间的权衡，支撑了诸多针对维管植物（vascular plants）提出的基于性状的理论。然而，由于难以量化非维管植物（nonvascular plants）的性状，我们对于性状如何调控非维管植物物种的生理与生态偏好的理论认知仍十分有限。本研究借助资源经济学理论（resource economics theory, RET）与最优分配理论（optimal partitioning theory, OPT），对苔藓的功能性状展开评估。我们在两种常见但生态位迥异的泥炭藓（Sphagnum）物种中检验了这两类理论的相关预测，通过一系列环境处理下的形态生理性状组合，探究泥炭藓是否具备功能性组织分配能力，以及所研究的两种泥炭藓物种是否符合维管植物中常见的快速或慢速生存策略。与资源经济学理论（RET）的预测一致，速生物种维持了更快的生长速率及……