DOI: 10.5061/dryad.kd51c5bcb
title: Patterns and repeatability of multi-ecotype assemblages of sympatric Salmonids

description: Aim: High repeatability among assemblages of closely related but
 ecologically distinct ecotypes implies predictability in evolution and
 assembly of communities. The conditions under which ecotype assemblages
 form predictably, and the reasons, have been little investigated. Here we
 test whether repeatability declines as the number of ecotypes builds.
 Location: Postglacial lakes with a circumboreal distribution. Time period:
 Data were extracted from studies published between 1982 and 2019. Major
 taxa studied: Ecotype assemblages from two Salmonid genera – Salvelinus
 and Coregonus. Fish in postglacial lakes commonly occur as pairs of
 ecotypes, typically with a pelagic and a littoral/benthic form, but in
 Salvelinus and Coregonus assemblages commonly contain multiple sympatric
 ecotypes. Methods: We used a meta-analysis of Salvelinus and Coregonus to
 empirically assess how repeatability varies across assemblages of two to
 seven ecotypes. We examined repeatability of use of broad niche categories
 as well as in underlying phenotypic traits. Results: Within Coregonus,
 repeatability across multi-ecotype assemblages did not break down with the
 addition of a third or fourth ecotype. However, in Salvelinus,
 repeatability was largely absent and independent of the number of
 ecotypes. Repeatability of trait frequency distributions was absent in
 both genera, yet associations between trait means and niche categories
 were evident especially in Coregonus. Main conclusions: These results show
 that repeatability can vary greatly between lineages; that repeatability
 needn’t break down as the number of ecotypes builds; and that high
 repeatability of broad niche categories may result despite marked
 differences in the underlying frequency distribution of trait means. These
 findings affirm the presence of repeatable ecotype assembly and early
 stages of divergence in postglacial fishes at a global scale, but also
 highlight variability among taxa and underlying phenotypic traits.
description: Data were collated from published and pre-printed studies
 following a systematic review. Code for data analysis and plotting are
 available here:
 https://github.com/stephblain/salmonids_repeatability
description: # Patterns and repeatability of multi-ecotype assemblages of sympatric
 Salmonids *** Data obtained from published literature through a systematic
 review. The focal dataset includes means, errors, and sample sizes for
 traits from sets of sympatric ecotypes of Coregonus or Salvelinus in
 postglacial lakes. Metadata includes lake locations and ecotype species.
 Data related to the systematic review process (abstract and full text
 scans) are also included here. Cells that contain "NA" indicate
 missing data, such as trait information that were not available in a
 particular study. ## Description of the data and file structure ### File:
 salmonids\_data.xlsx (1) ecotypes contains collated data with one row per
 record of an ecotype. Columns correspond to trait measures (mean, error,
 sample size) and meta-data for the ecotype (ex. lake) Paper\_ID = unique
 ID for each study in the meta-analysis Lake = name of the lake where
 samples were collected Species = scientific name of the species or species
 complex Morph\_zone = category of ecotype habitat (descriptive)
 Morph\_diet = category of ecotype diet (descriptive) GRc\_mean = mean
 number of gill rakers GRc\_n = sample size for gill rakers GRc\_e =
 measure of error for gill rakers GRc\_e\_type = type of error for gill
 rakers (SD = standard deviation, SE = standard error, CI95 = 95%
 confidence interval) C13\_mean = mean measure of isotope Carbon 13 C13\_n
 = sample size for isotope Carbon 13 C13\_e = measure of error for isotope
 Carbon 13 C13\_e\_type = type of error for isotope Carbon 13 (SD =
 standard deviation, SE = standard error, CI95 = 95% confidence interval)
 N15\_mean = mean measure of isotope Nitrogen 15 N15\_n = sample size for
 isotope Nitrogren 15 N15\_e = measure of error for isotope Nitrogen 15
 N15\_e\_type = type of error for Nitrogen 15 (SD = standard deviation, SE
 = standard error, CI95 = 95% confidence interval) length\_mean = mean body
 length, units listed in "length\_units" length\_n = sample size
 for body length length\_e = measure of error for body length
 length\_e\_type = type of error for body length (SD = standard deviation,
 SE = standard error, CI95 = 95% confidence interval) length\_units = units
 of measurement for body length (mm = millimetres, cm = centimetres)
 length\_type = type of body length measure (fork, standard, or total) age
 = mean measure of age in years age\_n = sample size for age age\_e =
 measure of error for age age\_e\_type = type of error for age (SD =
 standard deviation, SE = standard error, CI95 = 95% confidence interval)
 (2) lakes includes summarized information for all lakes included in the
 analysis Lake = name of the lake where samples were collected Paper\_IDs =
 unique ID for each study in the meta-analysis with data from that lake
 Country = political state where samples where collected Lat = latitude, in
 degrees Lon = longitude, in degrees Lacustrine\_morphs = number of
 lake-dwelling ecotypes identified in the lake (3) studies includes a
 citation for all studies that went through a full text review, including a
 reason for exclusion for studies not included in the dataset Paper\_ID =
 unique ID for each study in the meta-analysis Full\_Paper\_ID = unique ID
 for each study in the meta-analysis with first author name and year
 Reference = full citation ### File: salmonids\_abstracts.xlsx Each tab
 corresponds to one database searched in our systematic literature review:
 Web of Science, Scopus, Skulason and Smith 1995 (forward search), and
 bioRxiv Each tab includes a reference for each abstract scanned and a
 reason for exclusion for studies that were not included in the full text
 scan