Carbon Dynamics Along a Permafrost Gradient at Caribou-Poker Creeks Research Watershed (CPCRW) in Interior Alaska: Net Primary Production (NPP) for black spruce (Picea mariana) in a 75x75m spatial domain along a permafrost and vegetation gradient.

This dataset includes net primary production (NPP) data for black spruce (Picea mariana) in the Caribou-Poker Creeks Research Watershed. Project summary: Specific leaf area (SLA, leaf area per unit dry mass) is a key canopy structural characteristic, a measure of photosynthetic capacity, and an important input into many terrestrial process models. Although many studies have examined SLA variation, relatively few data exist from high latitude, climate-sensitive permafrost regions. We measured SLA and soil and topographic properties across a boreal forest permafrost transition, in which forest composition changed as permafrost deepened from 54 to >150 cm over 75 m hillslope transects in Caribou-Poker Creeks Research Watershed, Alaska. This is an exploratory study to begin understanding SLA variation and controls thereof in a non-contiguous permafrost system.

本数据集涵盖阿拉斯加州驯鹿-波克河研究流域（Caribou-Poker Creeks Research Watershed）内黑云杉（Picea mariana）的净初级生产力（net primary production, NPP）数据。项目摘要：比叶面积（Specific leaf area, SLA，即单位干质量对应的叶面积）是冠层结构的关键特征之一，可用于衡量光合能力，同时也是众多陆地过程模型的重要输入参数。尽管已有诸多研究探讨了比叶面积的变异规律，但高纬度气候敏感型冻土区域的相关数据仍相对匮乏。本研究在阿拉斯加州驯鹿-波克河研究流域的75米山坡样带上开展了相关测量，该样带属于北方森林冻土过渡带，随着永久冻土深度从54厘米加深至150厘米以上，森林群落组成随之发生变化，研究团队在此梯度下测定了比叶面积、土壤及地形属性。本研究为探索性研究，旨在初步理解非连续冻土系统中比叶面积的变异规律及其调控机制。