Overstory and understory data from a contemporary reference stand: the Beaver Creek Pinery, Lassen National Forest, CA

The Beaver Creek Pinery (BCP) is a ponderosa pine and black oak dominated stand in the Ishi Wilderness, Lassen National Forest, California. It has never been logged and due to its remoteness, has experienced more fire than many other such forests. Fires in 1990 and 1994 killed a substantial proportion of the ingrowth that is common in many other fire excluded stands, restoring a structure that is believed to be similar to what was found under historic fire regimes. This data publication contains measurements of tree, understory vegetation, and coarse woody debris variables taken in July of 1998 in the BCP, and may provide a useful reference for structural restoration of forests at similar elevations and of similar species composition.The purpose of this project was to quantify the composition and structure of overstory and understory vegetation in a contemporary reference stand that experienced numerous fires in the 20th century. Among the variables of interest were the density of various tree size classes as well as the heterogeneity and spatial patterns of different structures (overstory and understory) within this stand.These data were collected with the intent of periodic re-measurement. The plots are being re-measured during the summer/fall of 2016 as part of a Joint Fire Science Program funded study, and may be re-measured again in the future, for example, following disturbance/fire.

Original metadata date was 10/03/2017. On 05/04/2021 minor metadata updates were made to keywords.

比弗克里克林场（BCP）位于加利福尼亚州拉森国家森林的伊希荒野，是一片以ponderosa松树和黑橡树为主的林分。该林场从未遭受砍伐，由于其偏远性，经历的火灾次数远超其他类似林分。1990年和1994年的火灾导致大量生长在许多其他火灾排除林分中的幼苗死亡，从而恢复了一种结构，这种结构被认为与历史上火灾制度下的结构相似。本数据出版物包含了1998年7月在BCP进行的树木、林下植被和粗木质残留物变量的测量数据，可能为类似海拔和物种组成的森林结构恢复提供有价值的参考。本项目的目的是量化一个在20世纪经历了多次火灾的现代参照林分中乔木层和林下植被的组成和结构。其中，感兴趣的变量包括不同树木大小级别的密度以及该林分中不同结构（乔木层和林下层）的异质性和空间模式。这些数据收集的初衷是进行周期性重新测量。这些样地将在2016年夏季/秋季作为联合火灾科学计划资助的研究的一部分进行重新测量，未来也可能再次进行测量，例如在干扰/火灾之后。原始元数据日期为2017年10月3日。2021年5月4日对关键词进行了少量元数据更新。