baumlab / Magel_etal_2020_EcolApp

Data and R code for: Direct and indirect effects of climate change-amplified pulse heat stress events on coral reef fish communities

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Data and R code accompanying:

Direct and indirect effects of climate change-amplified pulse heat stress events on coral reef fish communities

Authors: Jennifer M.T. Magel, Sean A. Dimoff, Julia K. Baum

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In the data folder, KI_fish_data_raw.Rdata contains observation-level data for all fish observed in our underwater visual census surveys. Variables are defined as follows:

• ki.date = Date (DD_MM_YYYY) that the data was collected on Kiritimati (GMT+14)
• year = Year that the data was collected
• site = Site number
• transect = Transect number
• observer = Initials of the observer who conducted the survey
• species = Scientific name
• trophic = Trophic group assigned to each species (see AppendixS1: Table S3)
• size = Estimated length of the observed fish in cm
• number = Number of individuals observed (of a particular length)
• lw_a = Length-weight parameter 'a'
• lw_b = Length-weight parameter 'b'
• lcf = Length conversion factor
• length = Actual length of the fish (size x lcf)
• mass = Body mass of the fish (lw_a x (length ^ lw_b))
• heat = Heat stress time point; indicates whether data were collected before (2011, 2013), during (2015), or after (2017) the 2015-2016 El Niño
• f.pressure = Estimate of local human disturbance at each site as a categorical variable
• fp.cont = Estimate of local human disturbance at each site as a continuous variable
• npp.max = Maximum local primary productivity at each site (mg C m^-2 day^-1)
• survey_time = Start time for the first transect in the survey
• time.poly = Survey time converted into a continuous variable, to be modelled as a polynomial
• lunar.day = Lunar day (calculated from ki.date using the 'lunar' package)
• lunar.sine = Sine of lunar day

Note that variables ending in '.z' are the standardized versions of the continuous predictor variables.

KI_fish_data_sum.Rdata contains data on the mean site-level biomass (BM), abundance (AB), and species richness (SR) of the reef fish community as a whole ('total'), and for each individual trophic group (corallivores = 'coral', detritivores = 'det', generalist carnivores = 'gen', herbivores = 'herb', invertivores = 'inv', omnivores = 'omn', piscivores = 'pisc', planktivores = 'plank').