Ferns surveys of individuals of terrestrial ferns in Canopy Trimming Experiment (CTE) plots document changes in species richness and abundance over time in response to canopy opening and/or debris deposition

Whole plot surveys of Canopy Triming Experiment (CTE) plots were done to detect changes in the number of terrestrial fern species and individuals in response to canopy opening and debris deposition. Surveys were conducted annually prior to and after treatments. A count of all terrestrial ferns, identified to species on the CTE plots was recorded for each subplot in January during CTE1 (2002-2010) and in the fall during CTE2 (2014-present). The surveys document losses of individuals of shade tolerant fern species and the appearance of open canopy ferns such as the tree fern Cyathea arborea. Support for this work was provided by grants BSR-8811902, DEB-9411973, DEB-9705814 , DEB-0080538, DEB-0218039 , DEB-0620910 , DEB-1239764, DEB-1546686, and DEB-1831952 from the National Science Foundation to the University of Puerto Rico as part of the Luquillo Long-Term Ecological Research Program. Additional support provided by the University of Puerto Rico and the International Institute of Tropical Forestry, USDA Forest Service.本数据集针对冠层修剪试验（Canopy Triming Experiment, CTE）样地开展全样地调查，旨在探究冠层开度与枯落物沉积对陆生蕨类（terrestrial fern）物种数量及个体数的影响。调查于处理措施实施前后每年开展。在CTE1阶段（2002-2010年），于每年1月对各亚样地内所有鉴定到物种水平的陆生蕨类个体进行计数记录；在CTE2阶段（2014年至今），则于每年秋季开展相同调查。本调查记录了耐阴蕨类物种的个体消亡情况，以及树蕨（Cyathea arborea）等适生开阔冠层的蕨类物种的出现。本研究得到美国国家科学基金会（National Science Foundation）针对波多黎各大学的多项拨款资助，拨款编号包括BSR-8811902、DEB-9411973、DEB-9705814、DEB-0080538、DEB-0218039、DEB-0620910、DEB-1239764、DEB-1546686及DEB-1831952，相关工作属于卢奎洛长期生态研究计划（Luquillo Long-Term Ecological Research Program）的一部分。额外资助来自波多黎各大学以及美国农业部林务局热带林业国际研究所。