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Effect of Fire on Plant Biodiversity in the Brazilian Savannas

火灾对巴西稀树草原植物生物多样性的影响

基本信息

批准号：
9312590
负责人：
Otto Solbrig
金额：
$ 10万
依托单位：
Harvard University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1994
资助国家：
美国
起止时间：
1994-02-15 至 1999-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9312590&HistoricalAwards=false
关键词：
Effect Fire Plant Biodiversity Brazilian

项目摘要

9312590 Solbrig This project will study the effects of fire on vegetation biodiversity and heterogeneity in the cerrado, a savanna region in south-central Brazil. The aim of ecology is not just to describe pattern in nature, but to explain the mechanisms that contribute to that pattern. To assess the effects of fire on biodiversity and heterogeneity, this study will incorporate analyses of population and community ecology. Community level data will be collected in transects sampled across replicated experimental plots which are either burned frequently or left unburned. Population level data will focus on the effects of fire on the reproduction, growth and survivorship of nine common species, three species of grass and six tree species. %%% The cerrado region of Brazil has an unusually high diversity of plant species compared to other savanna regions. Fire has been an important force in the development of cerrado vegetation, but the precise effects of fire on species diversity in the cerrado is unknown. Although fire is commonly used as a management tool by ranchers, the long-term effects of this practice are relevant to species conservation. In addition, the importance of fire as a management tool in ecological reserves and national parks is still poorly understood. This study will provide experimental data on the effects of fire on community diversity and species survival in this species-rich region of Brazil. ***

9312590 Solbrig 该项目将研究火灾对巴西中南部稀树草原地区塞拉多植被生物多样性和异质性的影响。生态学的目的不仅仅是描述自然界的模式，而是解释促成该模式的机制。为了评估火灾对生物多样性和异质性的影响，本研究将纳入对人口和社区生态的分析。社区层面的数据将通过在经常燃烧或未燃烧的重复实验地块中采样的横断面来收集。人口水平数据将重点关注火灾对九种常见物种、三种草类和六种树种的繁殖、生长和生存的影响。 %%% 与其他稀树草原地区相比，巴西塞拉多地区的植物物种多样性异常高。火灾一直是塞拉多植被发展的重要力量，但火灾对塞拉多物种多样性的确切影响尚不清楚。尽管牧场主通常使用火灾作为管理工具，但这种做法的长期影响与物种保护有关。此外，人们对火灾作为生态保护区和国家公园管理工具的重要性仍然知之甚少。这项研究将提供有关火灾对巴西这个物种丰富地区群落多样性和物种生存影响的实验数据。 ***