Complementarity between herbaceous and woody plants in providing resources for bees in a semi-arid tropical climate: subsidies for conservation

raw data of plant inventory and phenology of herbaceous and woody strata in in three 0.5-ha plots located in the Vale do Curu Experimental Farm of Unversidade Federal do Ceará, Pentecoste, Ceará State, Brazil. The climate zone <br> corresponding to semi-arid (BSh) and the plots were installed in Caatinga vegetation.<br><br>Each plot was divided into 50 10x10 m subplots to identify the floristic composition and<br>the abundance of each species and to facilitate the phenological evaluation. <br>The dataset includes 4 spreadsheet: <br>1) inventory of all woody individuals in the plots with stem perimeter at the ground level equal to or greater than<br>9 cm. <br>2) phenology of woody plants int the plots. the flowering intensity of each plant observed with flowers,using the semi-quantitative method of Fournier (1974). This method estimates visually the percentage of the canopy covered with flowers, classifying it in one of the five cover classes<br>(0 to 4): 0 = absence of phenophase, 1 = 1-25%, 2 = 26-50%, 3 = 51-75%, and 4 = 76-100%.3) floral cover of herbaceous plants in 25 of the 50 10x10m<br>subplots of each plot. To assess the flowering in herbaceous strata we used the semi-quantitative method of Daubenmire<br>(1959), which also uses cover classes to estimate the population abundance of each species. To this aim we used a 50x50 cm PVC square. We used six classes to<br>estimate floral cover per species: 1 = up to 5%, 2 = 6-25%, 3 = 26-50%, 4 = 51-75%, 5 = 76-95%, 6 = 96-100% . <br>4) List of species recorded in the three plots, their classification in growth and life forms, indicating <br>whether bees visit the species and the resources collected by the bees. <br> <br> <br>

巴西塞阿拉州彭特科斯特市塞阿拉联邦大学（Universidade Federal do Ceará）Vale do Curu实验农场内，设置于3块面积为0.5公顷的样地中的草本层与木本层植物群落调查及物候观测原始数据。该区域气候类型为半干旱气候（BSh），样地均设于卡廷加（Caatinga）植被中。

每块样地被划分为50个10×10 m的小样方，用于开展物种组成调查、记录各物种种群多度，并简化物候评估流程。

本数据集包含4份电子表格文件：
1. 样地内所有地面处茎周长≥9 cm的木本个体调查清单。
2. 样地内木本植物的物候数据：针对开花个体，采用Fournier（1974）提出的半定量法评估其开花强度。该方法通过目视估算冠层开花面积占比，将其划分为5个覆盖等级（0至4）：0代表无该物候现象，1为1%~25%，2为26%~50%，3为51%~75%，4为76%~100%。
3. 各样地50个10×10 m小样方中，选取25个样方内的草本植物开花盖度数据。为评估草本层开花状况，本研究采用Daubenmire（1959）的半定量法，同样通过覆盖等级估算各物种种群多度，调查工具为50×50 cm的PVC方形样框。本次调查共设置6个盖度等级以估算单物种开花盖度：1为≤5%，2为6%~25%，3为26%~50%，4为51%~75%，5为76%~95%，6为96%~100%。
4. 3块样地中记录到的所有物种清单，包含其生长型与生活型分类，同时标注该物种是否有蜂类访花，以及蜂类采集的资源类型。