DOI: 10.5061/dryad.5x69p8d84
title: Data from: The effects of native seed mix composition and sowing density on plant community reassembly in wetlands

description: Seed-based restoration of wetlands is often necessary to improve important
 ecosystem functions (e.g., invasion resistance, habitat-provisioning) and
 meet society’s need for wetland ecosystem services such as supporting
 recreational activities and improving water quality.  However,
 persistent questions remain about the composition and sowing density of
 seed mixes needed to restore robust native wetland plant
 communities.  In Great Salt Lake wetlands (Utah, USA), the
 revegetation of native species is crucial to recovering critical habitat
 and preventing reinvasion of the invasive, non-native grass, Phragmites
 australis and other invasive species (e.g., Typha spp.).  In
 greenhouse and field experiments, we investigated the effects of seed mix
 composition and sowing density on plant community reassembly.  We
 predicted that seed mixes containing native forb species with
 resource-preempting traits (e.g., rapid seedling emergence, high
 aboveground growth rate), and high sowing densities (&gt;5,500 pure
 live seed m-2), would increase native plant light acquisition and
 establishment, thereby limiting invasive species.  To our
 surprise, the effect of seed mix composition on native plant performance
 (cover, biomass) varied among our experiments, with distinct differences
 between plant functional groups arising.  Native forb species had
 the highest performance in the greenhouse, but native grasses performed
 better in the field.  Although multiple seed mix compositions
 show promise for establishing high native cover and biomass, these mixes
 may not always suppress invasive species.  Interestingly, seed
 mix composition most often affected plant performance independent of
 sowing density.  However, in one greenhouse experiment, we found
 that only slow-growing mixes required a high sowing density to maximize
 native cover, an indication that the ideal sowing density may depend on
 the seed mix composition.  Our research also supports the idea
 that in addition to reducing propagules of invasive species via
 appropriate management strategies, the application of higher sowing
 densities (&gt;5,500 pure live seed m-2) may lead to more favorable
 outcomes when a high density of invasive plant seeds remains or stressful
 field conditions are present.  This research contributes to our
 knowledge of plant community reestablishment in wetlands and demonstrates
 how seed-based restoration strategies can catalyze native species
 revegetation and in some situations, reduce the cover of invasive species.
description: See article "The effects of native seed mix composition and
 sowing density on plant community reassembly in wetlands" for
 methods.
description: # Data from: The effects of native seed mix composition and sowing density
 on plant community reassembly in wetlands
 [https://doi.org/10.5061/dryad.5x69p8d84](https://doi.org/10.5061/dryad.5x69p8d84) Data are divided into 8 files as detailed below: -exp_1_cover.csv Contains cover data for Experiment 1.  Columns are described below: “mix” = seed mix composition where BICE=Bidens cernua monoculture, BOMA= Bolboschoenus maritimus monoculture, DISP= Distichlis spicata monoculture, ELPA= Eleocharis palustris monoculture, EPCI= Epilobium ciliatum monoculture, MIX= 9-species mix (mix of Bidens cernua, Bolboschoenus maritimus, Distichlis spicata, Eleocharis palustris, Epilobium ciliatum, Persicaria lapathifolia, Puccinellia nuttalliana, Rumex maritimus, Schoenoplectus acutus), PMIX= 4-species mix (mix of Distichlis spicata, Schoenoplectus acutus, Bolboschoenus maritimus, Eleocharis palustris), POLA= Persicaria lapathifolia monoculture, PUNU= Puccinellia nuttalliana monoculture, RUMA= Rumex maritimus monoculture, SCAC=Schoenoplectus acutus monoculture “density” = sowing density treatment (1X=1,938, 3X=5,813, and 5X=9,690 PLS m-2) “block” = block (1, 2, 3) “exp_day” = day of the experiment (8,15, 22, 29, 40) “date” = date data were collected (MM/DD/YYYY: 2/13/2020, 2/20/2020, 2/27/2020, 3/05/2020, 3/16/2020) “BICE_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Bidens cernua when in mixture “BOMA_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Bolboschoenus maritimus when in mixture “cyp_seedling_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Cyperaceae seedlings (Bolboschoenus maritimus, Schoenoplectus acutus, Eleocharis palustris) when in mixture (when identification to species was not possible) “DISP_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Distichlis spicata when in mixture.  For MIX, this also includes Puccinellia nuttalliana cover, as they were indistinguishable “ELPA_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Eleocharis palustris when in mixture “EPCI_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Epilobium ciliatum when in mixture “POLA_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Persicaria lapathifolia when in mixture “RUMA_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Rumex maritimus when in mixture “SCAC_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Schoenoplectus acutus when in mixture “total_cover” = total cover, drawn to a mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) -exp_1_biomass_mixes.csv Contains biomass data for mixes in Experiment 1.  Columns are described below: “mix” = seed mix composition where MIX = 9-species mix (mix of Bidens cernua, Bolboschoenus maritimus, Distichlis spicata, Eleocharis palustris, Epilobium ciliatum, Persicaria lapathifolia, Puccinellia nuttalliana, Rumex maritimus, Schoenoplectus acutus), PMIX= 4-species mix (mix of Distichlis spicata, Schoenoplectus acutus, Bolboschoenus maritimus, Eleocharis palustris) “density” = sowing density treatment (1X=1,938, 3X=5,813, and 5X=9,690 PLS m-2) “block” = block (1,2,3) “POA” = Distichlis spicata and Puccinellia nuttalliana dried aboveground biomass in grams (when identification to species level was not possible) “CYPS” = Cyperaceae species (Bolboschoenus maritimus, Schoenoplectus acutus, Eleocharis palustris) dried aboveground biomass in grams (when identification to species level was not possible) “BICE” = Bidens cernua dried aboveground biomass in grams “BICEflo” = Bidens cernua dried inflorescence biomass in grams “RUMA” = Rumex maritimus dried aboveground biomass in grams “RUMAflo” = Rumex maritimus dried inflorescence biomass in grams “POLA” = Persicaria lapathifolia dried aboveground biomass in grams “POLAflo” = Persicaria lapathifolia dried inflorescence biomass in grams “EPCI” = Epilobium ciliatum dried aboveground biomass in grams “EPCIflo” = Epilobium ciliatum dried inflorescence biomass in grams “DISP” = Distichlis spicata dried aboveground biomass in grams “BOMA” = Bolboschoenus maritimus dried aboveground biomass in grams “BOMAflo” = Bolboschoenus maritimus dried inflorescence biomass in grams “ELPA” = Eleocharis palustris dried aboveground biomass in grams “SCAC” = Schoenoplectus acutus dried aboveground biomass in grams -exp_1\_ biomass\_ monocultures.csv Contains biomass data for monocultures in Experiment 1.  Columns are described below: “mix” = seed mix composition where BICE = Bidens cernua monoculture, BOMA = Bolboschoenus maritimus monoculture, DISP = Distichlis spicata monoculture, ELPA = Eleocharis palustris monoculture, EPCI = Epilobium ciliatum monoculture, POLA = Persicaria lapathifolia monoculture, PUNU = Puccinellia nuttalliana monoculture, RUMA = Rumex maritimus monoculture, SCAC = Schoenoplectus acutus monoculture “density” = sowing density treatment (1X=1,938, 3X=5,813, and 5X=9,690 PLS m-2) “block” = block (1, 2, 3) “grams” = dried aboveground biomass in grams (Note: “NA” for POLA 3X Block 1 due to 1 missing observation). “flowgrams” = dried inflorescence biomass in grams -exp_2_cover.csv Contains cover data for Experiment 2.  Columns are described below: “mix” = seed mix composition where 100P = 100% graminoid, 75P25F = 75:25% graminoid:forb, 50P50F= 50:50% graminoid:forb, 100F = 100% forb. The graminoids were Bolboschoenus maritimus, Schoenoplectus acutus, Distichlis spicata, Eleocharis palustris, and Puccinellia nuttalliana sown in equal proportions.  The forbs were Bidens cernua, Epilobium ciliatum, Rumex maritimus, Symphyotrichum ciliatum and Euthamia occidentalis sown in equal proportions. “density” = sowing density treatment (1X=1,938 and 5X = 9,690 PLS m-2) “phrag” = Phragmites australis seed density where LPA = low Phragmites australis (538 PLS m-2) and HPA = high Phragmites australis (5,382 PLS m-2). “block” = block (B1, B2, B3, B4) “date” = date data were collected (MM/DD/YYYY: 4/21/2021, 4/28/2021, 5/5/2021, 5/12/2021) “exp_day” = day of the experiment (16, 23, 30, 37) “BICE” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Bidens cernua “BOMA” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Bolboschoenus maritimus “CYP_sdl” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Cyperaceae seedlings (Bolboschoenus maritimus, Schoenoplectus acutus, Eleocharis palustris) when identification to species level was not possible “DISP_PUNU” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Distichlis spicata and Puccinellia nuttalliana (when species level identification was not possible) “ELPA” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Eleocharis palustris “EPCI” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Epilobium ciliatum “EUOC” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Euthamia occidentalis “EUOC_SYCI” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Euthamia occidentalis and Symphyotrichum ciliatum (when species level identification was not possible) “PHAU” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Phragmites australis “poa_cov” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of grasses (when species level identification was not possible) “RUMA” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Rumex maritimus “SCAC” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Schoenoplectus acutus “SYCI” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Symphyotrichum ciliatum “total_cover” = total cover, drawn to a mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) -exp_2_biomass.csv Contains biomass data for Experiment 2. Columns are described below: “mix” = seed mix composition where 100P = 100% graminoid, 75P25F = 75:25% graminoid:forb, 50P50F= 50:50% graminoid:forb, 100F = 100% forb. The graminoids were Bolboschoenus maritimus, Schoenoplectus acutus, Distichlis spicata, Eleocharis palustris, and Puccinellia nuttalliana sown in equal proportions.  The forbs were Bidens cernua, Epilobium ciliatum, Rumex maritimus, Symphyotrichum ciliatum and Euthamia occidentalis sown in equal proportions. “density” = sowing density treatment (1X=1,938 and 5X = 9,690 PLS m-2) “phrag” = Phragmites australis density where LPA = low Phragmites australis (538 PLS m-2) and HPA = high Phragmites australis (5,382 PLS m-2). “block” = block (1, 2, 3, 4) “BICE” = Bidens cernua dried aboveground biomass in grams “BICE_flo” = Bidens cernua dried inflorescence biomass in grams “BOMA” = Bolboschoenus maritimus dried aboveground biomass in grams “BOMA_flo” = Bolboschoenus maritimus dried inflorescence biomass in grams “DISP_PUNU” = Distichlis spicata and Puccinellia nuttalliana dried aboveground biomass in grams “ELPA” = Eleocharis palustris dried aboveground biomass in grams “EPCI” = Epilobium ciliatum dried aboveground biomass in grams “EPCI_flo” = Epilobium ciliatum dried inflorescence biomass in grams “EUOC” = Euthamia occidentalis dried aboveground biomass in grams “PHAU” = Phragmites australis dried aboveground biomass in grams “RUMA” = Rumex maritimus dried aboveground biomass in grams “RUMA_flo” = Rumex maritimus dried inflorescence biomass in grams “SCAC” = Schoenoplectus acutus dried aboveground biomass in grams “SYCI” = Symphyotrichum ciliatum dried aboveground biomass in grams Experiment 3 -exp_3_year1_cover.csv Contains cover data for year 1 in Experiment 3. Columns are described below: “site” = site where FB = Farmington Bay and HS= Howard Slough “mix” = seed mix composition where control = unseeded control, M0 = 100% graminoid, M0.1 = 90:10% graminoid:forb; M0.25 = 75:25% graminoid:forb; M1 = 100% forb. The graminoid species included in equal proportions were Distichlis spicata, Puccinellia nuttalliana, Schoenoplectus acutus, Bolboschoenus maritimus, and Eleocharis palustris. The forb species included in equal proportions were Bidens cernua, Epilobium ciliatum, and Rumex maritimus. “density” = sowing density treatment where 0X = unseeded control, 1X = 1,938 PLS m-2, 3X = 5,813 PLS m-2 “block” = block (1, 2, 3) “date” = date data were collected (MM/DD/YYYY: 6/11/2020, 6/12/2020, 6/18/2020, 6/19/2020, 6/25/2020, 6/26/2020, 7/2/2020, 7/3/2020, 7/9/2020, 7/10/2020, 7/16/2020, 7/17/2020, 7/22/2020, 7/23/2020, 8/6/2020, 8/7/2020, 8/20/2020, 8/21/2020, 9/1/2020, 9/15/2020, 9/17/2020) “BICE” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Bidens cernua “BOMA” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Bolboschoenus maritimus “cheno_spp” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Amaranthaceae species “DISP” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Distichlis spicata and Puccinellia nuttalliana (identification to species level was not possible) “ECCR” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Echinochloa crus-galli “ELPA” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Eleocharis palustris “EPCI” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Epilobium ciliatum “LEMI” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Lemna minor “PHAU” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Phragmites australis “POMO” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Polypogon monspeliensis “RASC” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Ranunculus sceleratus “ROPA” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Rorippa palustris “RUMA” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Rumex maritimus “Rumex_spp” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Rumex species, when identification to the species level was not possible “RUST” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Rumex stenophyllus “SCAC” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Schoenoplectus acutus “SCAM” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Schoenoplectus americanus “SOAS” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Sonchus asper “Typha” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Typha species “unkcypsdln” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Cyperaceae species, when identification to the species level was not possible “unkforb” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of unknown forb species “unkpoasdln” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of grass species, when identification to the species level was not possible -exp_3_year2_cover.csv Contains cover data for year 2 in Experiment 3.  Columns are described below: “site” = site where FB = Farmington Bay and HS= Howard Slough “mix” = seed mix composition where control = unseeded control, M0 = 100% graminoid, M0.1 = 90:10% graminoid:forb; M0.25 = 75:25% graminoid:forb; M1 = 100% forb. The graminoid species included in equal proportions were Distichlis spicata, Puccinellia nuttalliana, Schoenoplectus acutus, Bolboschoenus maritimus, and Eleocharis palustris. The forb species included in equal proportions were Bidens cernua, Epilobium ciliatum, and Rumex maritimus. “density” = sowing density treatment where 0X = unseeded control, 1X = 1,938 PLS m-2, 3X = 5,813 PLS m-2 “block” = block (1, 2, 3) “date” = date data were collected (MM/DD/YYYY: 7/20/2021, 7/21/2021) Column headers that are species codes are as described above in the description of exp_3_year1_cover.csv with the exception of the following: “DISP” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Distichlis spicata “PUNU” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Puccinellia nuttalliana “EUOC” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Euthamia occidentalis “SYCI” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Symphyotrichum ciliatum “HOJU” = mid-point of cover class (0%, &gt;0–1%, 2–10%, 11–20%, 21–30%, 31–40%, 41–50%, 51–60%, 61–70%, 71–80%, 81–90%, 91–98%, 99–100%) of Hordeum jubatum -exp_3_enviro.csv Contains salinity and standing water data that were monitored in year 1 of Experiment 3. “site” = site where FB = Farmington Bay and HS= Howard Slough “date” = date data were collected (MM/DD/YYYY: 6/11/2020, 6/12/2020, 6/18/2020, 6/19/2020, 6/25/2020, 6/26/2020, 7/2/2020, 7/3/2020, 7/9/2020, 7/10/2020, 7/16/2020, 7/17/2020, 7/22/2020, 7/23/2020, 8/6/2020, 8/7/2020, 8/20/2020, 8/21/2020, 9/1/2020, 9/15/2020, 9/16/2020) “block” = block (1, 2, 3) “YSI_ww_ppt” = well water salinity in ppt “YSI_sw_ppt” = surface water salinity in ppt (Note: only taken when surface water was present, “NA” values when unable to collect measurements) “watercm1” = standing water depth in cm (subsample 1 of block) “watercm2” = standing water depth in cm (subsample 2 of block) “watercm3” = standing water depth in cm (subsample 3 of block)