DOI: 10.5061/dryad.ht76hdrcd
title: Marmot capture history data and growing season length data

description: Seasonal environmental conditions shape the behavior and life history of
 virtually all organisms. Climate change is modifying these seasonal
 environmental conditions, which threatens to disrupt population dynamics.
 It is conceivable that climatic changes may be beneficial in one season
 but result in detrimental conditions in another because life-history
 strategies vary between these time periods. We analyzed the temporal
 trends in seasonal survival of yellow-bellied marmots (Marmota
 flaviventer) and explored the environmental drivers using a 40-y dataset
 from the Colorado Rocky Mountains (USA). Trends in survival revealed
 divergent seasonal patterns, which were similar across age-classes. Marmot
 survival declined during winter but generally increased during summer.
 Interestingly, different environmental factors appeared to drive survival
 trends across age-classes. Winter survival was largely driven by
 conditions during the preceding summer and the effect of continued climate
 change was likely to be mainly negative, whereas the likely outcome of
 continued climate change on summer survival was generally positive. This
 study illustrates that seasonal demographic responses need disentangling
 to accurately forecast the impacts of climate change on animal population
 dynamics. We were able to impute body mass for each individual twice
 during each year following their first capture using a similar approach to
 Ozgul et al. (2010) (for more details on the modeling procedure see SI
 Appendix within the main paper). Body mass measurements were
 log-transformed.
description: We used data from the population located in the Upper East River
 Valley, Colorado, in and around the Rocky Mountain Biological Laboratory
 (RMBL), which has been studied since 1962. The population comprises four
 main colonies and 12 satellite colonies distributed between 2,700 and
 3,100 m above sea level. We used live trapping data of yellow-bellied
 marmots from 1979 to 2018 (an interval during which we had high-quality
 environmental data and extensive trapping effort) to construct capture
 histories for each individual. Individuals were marked with both fur dye
 and permanent ear tags with unique ID numbers (59). Individuals were also
 weighed during each capture.
description: Body mass data have been log transformed. Growing season length
 data are in number of days. There are no missing values. The complete
 flowering phenology dataset used to calculate growing season length is
 archived at https://osf.io/ jt4n5/.
description: # Marmot capture history data and growing season length data
 We used live trapping data
 of yellow-bellied marmots from 1979 to 2018. Individuals were marked with
 both fur dye and permanent ear tags with unique ID numbers. Individuals
 were also weighed during each capture. We used data on growing season
 length which is the number of days between first and last flower. ##
 Description of the data and file structure The
 "dryad_capture_histories_age_logbm" datafile contains capture
 history data for each female marmot included in the analysis. Each row
 therefore represents an individual marmot. The first column (ch) contains
 the capture history data starting XXX, followed by the time varying
 individual covariates of age and body mass (bm). The
 "dryad_RMBL_growing_season_length" datafile contains two
 columns, namely the year and the growing season length in number of days.
 ## Sharing/Access information Below are links to sources were data used in
 the article was derived from: * The complete flowering phenology data-set
 used to calculate growing season length is archived at
 . * The monthly average temperature and total
 pre-cipitation data for Crested Butte that were used to calculate a
 calibrateddrought severity index for the RMBL were downloaded from the
 NCEI Cli-mate Data Online ( * RMBL
 environmental data (including total snowfall, mean minimummonthly
 temperatures, and snowmelt date) can be downloaded from
 .