Soil Calcium: Effect of Burning Patterns on Vegetation in the Fish Lake Burn Compartments

This study examines the effects of long-term prescribed burning treatments on vegetation structure and composition, productivity, and nutrient cycling in upland oak savanna and woodland vegetation. The basis for the study is an ongoing, experimental prescribed burning program begun in 1964 at Cedar Creek, and a similar program operating since 1962 on the adjacent Helen Allison Savanna property (owned by The Nature Conservancy). These prescribed burning programs are designed to subject upland oak communities (and some old fields) to different burn frequencies and patterns of burning, with the ultimate objectives of 1) restoring and maintaining the historically important savanna and open woodland vegetation, and 2) providing information about the effects of different burning patterns on vegetation structure and composition. This study addresses the latter of these two purposes and expands on it by also investigating possible influences of fire on resource availability (nutrients, water, and light) and net primary productivity. This study represents a continuation and expansion of experiments 015 and 094.

本研究针对高地栎类稀树草原与林地植被，探究长期规定火烧（prescribed burning）处理对植被结构与组成、生产力以及养分循环的影响。本研究的实验基础为两项持续开展的规定火烧试验项目：其一为1964年于锡达克里克（Cedar Creek）启动的试验项目，其二为1962年起在相邻的海伦·艾莉森稀树草原地块（由大自然保护协会（The Nature Conservancy）所有）运行的同类项目。上述规定火烧项目旨在使高地栎类群落（及部分弃耕地）接受不同火烧频率与火烧模式的处理，最终达成两大核心目标：一是修复并维持兼具历史生态价值的稀树草原与开阔林地植被；二是厘清不同火烧模式对植被结构与组成的影响规律。本研究聚焦上述两大目标中的第二项，并在此基础上拓展研究范畴，同时探究火烧对资源可获得性（养分、水分与光照）以及净初级生产力的潜在调控作用。本研究是对015号与094号试验的延续与拓展。