Dataset: carbon and nitrogen content in coarse woody debris sampled in northern Brazilian Amazon

The dataset provides information on carbon and nitrogen content (%) in coarse woody debris pieces (stem diameter ≥ 10 cm) sampled in two different Protected Areas situated in state of Roraima, northern Brazilian Amazon: Maracá Ecological Station (Maraca) and Viruá National Park (Virua). Both areas are PPBio (Biodiversity Research Program) grids characterized by distinct forest types. Our sampling took into consideration 128 pieces: 56 (Maraca) and 72 (Virua). All pieces were observed/measured in 2008, as specified in Silva, L.F.S.G.; Castilho, C.V.; Cavalcante, C.O.; Pimentel, T.P.; Fearnside, P.M.; Barbosa, R.I. 2016. Production and stock of coarse woody debris across a hydro-edaphic gradient of oligotrophic forests in the northern Brazilian Amazon. Forest Ecology and Management, 364: 1-9 (doi: 10.1016/j.foreco.2015.12.045). Our dataset has a file (carbon_nitrogen_NECROMASS.xlx) where are presented all information for each sampled piece (wood_piece_number), associated to the carbon content (%), nitrogen content (%), taxonomy (family; species), sampling date, etc. The dataset was supported by supported by INPA’s institutional project ‘‘Ecology and Management of Natural Resources of the Roraima Savanna” (PPI-INPA 012/18; 2008–2012) and the Biodiversity Research Program (PPBio Western Amazonia, Manaus). The National Council for Scientific and Technological Development of Brazil provided fellowships for R.I. Barbosa (CNPq 306286/2008-4) and P.M. Fearnside (CNPq 304020/2010-9). L.F.S.G. Silva and C. O. Cavalcante were supported by post-graduate fellowships provided by Brazilian Coordination for the Improvement of Higher Education Personnel (CAPES). The Chico Mendes Institute for Biodiversity Conservation (ICMBio) provided infrastructure and authorization for the study (Authorizations 17398-1 and 17398-2 in 2009; 22576-1 in 2010).

本数据集记录了巴西亚马孙北部罗赖马州（Roraima）两处保护区内的粗木质残体（coarse woody debris，直径≥10cm的树干段）的碳、氮含量（百分比）数据，两处保护区分别为马拉卡生态站（Maracá Ecological Station，Maraca）与维鲁阿国家公园（Viruá National Park，Virua）。
两处区域均属于生物多样性研究计划（PPBio, Biodiversity Research Program）样地，具有独特的森林类型。
本次采样共获取128份残体样本，其中马拉卡生态站56份，维鲁阿国家公园72份。所有样本均于2008年完成观测与测量，相关研究细节参见文献：Silva, L.F.S.G.; Castilho, C.V.; Cavalcante, C.O.; Pimentel, T.P.; Fearnside, P.M.; Barbosa, R.I. 2016. 巴西亚马孙北部贫营养森林水文-土壤梯度下的粗木质残体产量与储量. 森林生态与管理, 364: 1-9 (doi: 10.1016/j.foreco.2015.12.045)。
本数据集附带文件carbon_nitrogen_NECROMASS.xlx，其中收录了每份采样残体的全部相关信息：包括残体编号（wood_piece_number）、碳含量（%）、氮含量（%）、分类学信息（科；物种）、采样日期等。
本数据集得到了巴西国家亚马逊研究所（INPA）的机构项目“罗赖马稀树草原自然资源生态与管理”（PPI-INPA 012/18; 2008–2012）以及生物多样性研究计划（PPBio 西亚马孙，马瑙斯）的支持。巴西国家科学技术发展委员会（CNPq, National Council for Scientific and Technological Development）为R.I. Barbosa（CNPq 306286/2008-4）与P.M. Fearnside（CNPq 304020/2010-9）提供了研究资助。L.F.S.G. Silva与C.O. Cavalcante得到了巴西高等教育人员发展协调局（CAPES, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior）的研究生奖学金支持。奇科·门德斯生物多样性保护研究所（ICMBio, Chico Mendes Institute for Biodiversity Conservation）为本研究提供了基础设施与研究许可（2009年许可编号17398-1、17398-2；2010年许可编号22576-1）。