Data for Scientists

As part of our NSF-funded Long-Term Research in Environmental Biology (LTREB) grant, we agreed to make available to legitimate scientific users, copies of our original census data for each of the 30 populations. Censuses were initiated between 1998 and 2004, and have continued without interruption to the present. Determining fates of missing individuals can take up to two additional seasons. Therefore, we provide data only for populations up to within three years of the present.

About the census: The census data represent the hard work of the PI and dozens of trained undergraduate and graduate student research teams since 1998. Our censuses were designed to parameterize size-based population projection matrix models. The census point is late May to mid-June, depending on the population location, and is consistent (+/- 1 or 2 wk) from one year to the next. The initial census each year is intended to occur after full leaf expansion, but prior to extended risk of deer browse. At that time, plant dimensions are measured, new seedlings noted and added to the census sheets, and attributes of individual plants are scored (e.g., reproductive status, disease status, etc.). In August, each population is revisited, and every individual is scored for presence, a complete census of berries and seeds is made, and a variety of other qualitative traits are scored (e.g., insect herbivory, disease, browse, etc.). A sample census data sheet is given here so you can evaluate the utility of the data set for your application: Sample data set

Legitimate scientific use: What constitutes legitimate scientific use of the data is determined on a case-by-case basis. Our goal, however, is to encourage the widest possible use of the data set so that the investment of taxpayer dollars and personnel time fhas the largest possible scientific yield. To access the data, please contact the PI ([email protected]), give your identifying information, including your position, your educational institution or government agency, and explaining in detail the scientific utility of the data for your project. You may be asked for additional information at that time, and, if your project is designated a legitimate scientific use of the data, you will be asked to sign a Data Use Agreement which sets out the specific permissions granted for data use, in writing.