DOI: 10.5061/dryad.7qj20
title: Data from: Where and how to restore in a changing world: a demographic-based assessment of resilience

description: Managers are increasingly looking to apply concepts of resilience to
 better anticipate and understand conservation and restoration in a
 changing environment. In this study, we explore how information on
 demography (recruitment, growth and survival) and competitive effects in
 different environments and with different starting species abundances can
 be used to better understand resilience. We use observational and
 experimental data to better understand dynamics between native Stipa
 pulchra and exotic Avena barbata and fatua, grasses characteristic of
 native and invaded grasslands in California, at three different levels of
 nitrogen (N) representative of a range of pollution via atmospheric
 deposition. A modelling framework that incorporates this information on
 demography and competition allows us to forecast dynamics over time. Our
 results showed that resilience of native grasslands depends on N inputs,
 where natural recovery should be possible at low N levels whereas native
 persistence would be difficult at high N levels. Hysteresis was evident at
 moderate N levels, where the starting conditions mattered. Synthesis and
 applications. The resilience of both invaded and native grasslands is
 influenced by nitrogen inputs. Our modelling approach gives direction
 about how best to allocate limited management resources as baselines
 shift: where natural recovery is possible, where best to allocate active
 restoration efforts, and where native remnants may be most vulnerable.
description: Stipa Seedling
 SurvivorshipStipa pulchra seedling
 survivorship and stem counts of Stipa seedlings and adults and Avena
 adults across two community types (Stipa pulchra or Avena fatua), three
 Nitrogen treatments (low, ambient, and high), and three light treatments
 (low, ambient, and high) within study conducted at the University of
 California South Coast Research and Extension Center.JPE_stipa
 data.csvStipa adult
 survivorshipThe number of Stipa
 pulchra adults at each sampling point and the proportion of adults that
 survived across seven blocks of paired grazed and ungrazed plots over two
 years at the Vasco Caves Regional ParkJPE_Vasco_Stipa_adult_survival.csvStipa adult fecundityReproductive data for Stipa pulchra at Vasco Caves Regional Park. These data include total number of individuals within a plot, whether a given individual reproduced and the number of culms per plant if it did. These data span multiple years and grazed treatments.JPE_Vasco_Stipa.csvStipa pulchra recruitment dataRecruitment data for Stipa pulchra across three nitrogen treatments at the Irvine Ranch Natural LandmarkJAE_stipa germination data.csvData to assess Avena seed productionAvena fatua stem counts and per capita seed production data, as well as Stipa pulchra seedling and adult stem counts across two community types (Stipa pulchra or Avena fatua), three Nitrogen treatments (low, ambient, and high), and three light treatments (low, ambient, and high) within study conducted at the University of California South Coast Research and Extension Center.JPE_Avena data.csvAvena recruitmentGermination and recruitment stem data for Avena barbata across a density and precipitation experiment conducted at the University of California Sierra Foothills Research and Extension Center.JPE_Avena recruitment.csv