Dataset to estimate biomass and carbon stocks in ecotone forests on the eastern of Maracá Island, northern Brazilian Amazon

The dataset provides information on biomass / carbon estimates for the ecotone forests dispersed on the eastern region of the Maracá Ecological Station; a Brazilian protected area formed by Maracá Island and islets (hereafter “Maracá”) located on the Rio Uraricoera, State of Roraima, northern Brazilian Amazon. The carbon in above-ground total biomass (AGB) was estimated based on data from the 4th “tree+palm” census (https://data.mendeley.com/datasets/8cdwkhcsy7/2) carried out in 129 permanent plots (50 mx 10 m; 6.45 ha) installed on the six East-West trails in the PPBio research grid installed in Maracá (https://ppbio.inpa.gov.br/sitios/maraca). A general allometric model (Chave et al., 2014) was adopted for estimate AGB for each tree in the database. The palms biomass was performed at the gender level using the allometric models of Goodman et al. (2013). The individual carbon was calculated multiplying the biomass of each tree/palm by a factor of 0.5 (considering 50% of C). The individuals carbon values were used to compose the total carbon stock in each plot taking into account three arboreal classes: (i) P. gracilipes (Leguminosae tree species with higher abundance in the region), (ii) others (all other tree species) and (iii) palms (a set of five arborescent species). The dataset consists of three files: (i) study_site - a figure indicating the geographical location of the study area; (ii) location_plot - identification of the sampling plots (unique code) and their geographical location in (i) lat / long - WGS84 and (ii) UTM / Zone 20 N, WGS 84; (iii) biomass_carbon - biomass and carbon stocks of P. gracilipes, others and palm trees (Mg / 500m² and % of each arboreal class). The current dataset was supported by the projects (i) SavFloRR - Ecologia e manejo dos recursos naturais de ecossistemas de savanas e florestas de Roraima (PPI INPA 015/122), and (ii) Crescimento e mortalidade de árvores em florestas ecotonais de Roraima: efeito das condicionantes ambientais e da variabilidade climática (Proc. CNPq n. 403591 / 2016-3). The Coordination for the Improvement of Higher Education Personnel (CAPES) supported E.H.S. The PELD Program provide a scholarship to W.R.S. (CNPq / CAPES / FAPs / BC-Fundo Newton; Proc. N. 441575 / 2016-1). The National Council Scientific and Technological Development (CNPq) provided a grant to R.I. Barbosa (CNPq 304204 / 2015-3). The Chico Mendes Institute for Biodiversity Conservation (ICMBio) authorized the study (SISBIO nº 52071).

该数据集提供了关于东部地区马卡拉生态站生态过渡林生物质/碳含量的估计信息；马卡拉生态站是巴西的一个保护区，由马卡拉岛及其周围岛屿（以下简称“马卡拉”）组成，位于乌拉里科埃拉河畔的罗赖马州，巴西北部亚马逊地区。地上总生物量（AGB）中的碳含量是根据第4次“树木+棕榈树”普查（https://data.mendeley.com/datasets/8cdwkhcsy7/2）的数据进行估算的，该普查在马卡拉PPBio研究网格中的六条东西向小径上的129个永久样地（50 mx 10 m；6.45 ha）上进行（https://ppbio.inpa.gov.br/sitios/maraca）。为估算数据库中每棵树的AGB，采用了通用的生物量异速生长模型（Chave等，2014）。棕榈树生物量的估算采用了Goodman等（2013）提出的异速生长模型。通过将每棵树/棕榈树生物量乘以0.5的系数（考虑到50%的碳含量）来计算单个碳含量。利用个体碳含量，结合三个树木类别：①P. gracilipes（该地区丰富度最高的豆科树种），②其他树种（所有其他树种）和③棕榈树（一组五种乔木树种），计算了每个样地中的总碳储量。数据集包含三个文件：（i）研究区域示意图，表示研究区域的地理位置；（ii）位置样地，识别采样样地（唯一代码）及其地理位置，包括（i）经纬度 - WGS84和（ii）UTM/20N区，WGS 84；（iii）生物质/碳含量，包括P. gracilipes、其他树种和棕榈树的生物量和碳储量（Mg/500m²和每个树木类别的百分比）。当前数据集得到了以下项目支持：（i）SavFloRR - 罗赖马州草原和森林自然资源的生态学和管理（PPI INPA 015/122），以及（ii）罗赖马州生态过渡林树木生长与死亡率：环境因素和气候变化的影响（CNPq项目号 403591 / 2016-3）。高等教育人员能力提升协调处（CAPES）支持了E.H.S.的研究。PELD项目为W.R.S.提供了奖学金（CNPq / CAPES / FAPs / BC-Fundo Newton；项目号 N. 441575 / 2016-1）。国家科技发展理事会（CNPq）为R.I. Barbosa提供了资助（CNPq 304204 / 2015-3）。奇科·门德斯生物多样性保护研究所（ICMBio）授权了该研究（SISBIO编号 52071）。