DOI: 10.5061/dryad.j6q573nrw
title: Data from: Foundational kelp species reveal links between host traits, the environment, and the associated microbial community

description: Canopy kelp are foundational species in coastal ecosystems and host
 diverse bacterial communities. The dataset was used to test the
 association between bull kelp (Nereocystis luetkeana) host traits,
 blade-associated bacterial taxa, and seawater environmental features
 across nine sites spanning more than 200 km in Washington state. Traits
 related to kelp fitness, such as carbon fixation and nitrogen content,t as
 well as environmental features, are included in the dataset.
description: # Data from: Foundational kelp species reveal links between host traits,
 the environment, and the associated microbial community Dataset DOI:
 [10.5061/dryad.j6q573nrw](10.5061/dryad.j6q573nrw) datafile name:
 Pfister_NereocystisGeography_RoySocOpen_Oct2025.csv ## Description of the
 data and file structure The data collected tested kelp uptake of carbon,
 the release of DOC, and tissue features across sites in Washington state.
 Data on surrounding nutrients are also included. NA indicates that data
 were not collected. Data on the microbial taxa present are archived with
 NCBI, #PRJNA1301461 Headings for each column of the data are described in
 order: year date month locale - within coastal Washington state; see
 Methods and Figure 1 in manuscript Region – locale divided into 3 regions
 in coastal Washington state Replicate – per site per year wetmass_g –
 wetmass of *Nereocystis* tissue used in estimating carbon fixation,
 reported in grams drymass_g - drymass of *Nereocystis* tissue used in
 estimating carbon fixation, reported in grams mgCfixed_gdrymass_hr – the
 mg of Carbon fixed per g drymass of *Nereocystis* per hour
 DOCmgl_release_gdrymass_hr_corr01 - the mg of dissolved organic Carbon
 released per g drymass of *Nereocystis* per hour, with 0.01 added to all
 values to allow analyses of log values for all and to avoid dividing by
 zero (see below) DOC_um_hr_drymass - the uM of Carbon dissolved organic
 Carbon released per g drymass of *Nereocystis* per hour to_po4 - the
 initial P04 concentration in uM to_si - the initial SiO4 concentration in
 uM to_no3 - the initial NO3 concentration in uM to_no2 - the initial NO2
 concentration in uM to_nh4 - the initial NH4 concentration in uM to_DIN -
 the initial dissolved inorganic nitrogen concentration in uM uM_DOC_to
 -the initial dissolved organic carbon concentration in uM tf_po4 - the
 final P04 concentration in uM tf_si -the final SiO4 concentration in uM
 tf_no3 - the final NO3 concentration in uM tf_no2 - the final NO2
 concentration in uM tf_nh4 - the final NH4 concentration in uM tf_DIN -
 the final dissolved inorganic nitrogen concentration in uM
 no3_uptake_h_gdm - the uM change in NO3 per hour per gram drymass of
 *Nereocystis* bulb_diam - widest part of bulb, in mm blade_length - blade
 length used in assay, in cm Repro – indication of whether kelp is
 reproductive (R) or not (NR) deln - the delta 15N, stable isotope ratio of
 Nitrogen, in *Nereocystis* tissue delc - the delta 13C, stable isotope
 ratio of Carbon, in *Nereocystis* tissue pctn - the percent of tissue
 nitrogen (as dry mass) in *Nereocystis* tissue pctc - the percent of
 tissue carbon (as dry mass) in *Nereocystis* tissue c_n - the ratio of
 tissue carbon to tissue nitrogen (pctc/pctn) temperature - in deg C
 salinity - in ppt ratioCfixtoDOCrel - the ratio of inorganic carbon fixed
 to dissolved organic carbon released
 (mcCfixed_gdrymasshr/DOCmgl_release_gdrymass_hr_corr01) ## Access
 information Data on the microbial taxa present are archived with NCBI,
 #PRJNA1301461