DOI: 10.5061/dryad.2280gb62c
title: Data from: Hydrological dynamics, wetland morphology and vegetation structure determine riparian arthropod communities in constructed wetlands

description: The data consists of data collected by 41 constructed wetlands in southern
 Sweden, where water level measurements were conducted between April 2020
 and February 2023, and where vegetation height, grazing animal
 presence/absence, and flooded grassland area was measured in 2020. The
 data also includes collected abundances of riparian arthropods that were
 captured using SLAM (Sea Land and Air Malaise) trapping, pitfall trapping
 and vacuum sampling at three times during the spring and summer of 2020;
 late May, late June to early July and late August to early September. The
 arthropods were identified to genus level for spiders, beetles, predatory
 diptera and tipulidomorphs, whereas the remaining taxa were identified to
 family level. 
description: <strong>Arthropod collections</strong>
 During three periods of spring and summer of 2020 (late May, late
 June to early July and late August to early September, we collected
 riparian arthropods by the wetland using three capturing techniques. SLAM
 (Sea Land and Air Malaise) traps were placed &lt;2m from the water
 edge during three nights at all collection periods whereas triplicate 70mm
 diameter pitfall traps were used during May collections, along a 10m
 gradient parallel to the wetland shoreline within 5m of the SLAM trap.
 Both SLAM and pitfall traps contained soapy water as the killing agent.
 Vacuum sampling was performed in late June to early July and late August
 to early September using a converted Stihl™ BG85 Leaf blower in triplicate
 along a 10m gradient parallel to the wetland shoreline delineated with a
 45cm diameter hoop, where samples were manually collected using a pooter,
 after evacuating the contents into a collection container. All arthropod
 samples were stored in 70% ethanol and were later identified to orders,
 with selected taxa being identified to lower taxonomic levels. For
 analysis, we focused on taxa that were sufficiently abundant by including
 taxa with &gt;100 total individuals and being present in &gt;70%
 of the sites. <strong>Hydrological
 measurements</strong> To calculate hydrology
 dynamics in the constructed wetlands, we deployed a pressure sensor
 transducer (ETM DeltaBlue with barometric pressure sensor) at the deepest
 point of each wetland that measured the differential pressure between the
 water and air to measure the water depth at a 60-minute interval between
 April 2020 and February 2023. The measurements were wirelessly transmitted
 to a server from which daily mean water levels were calculated. These were
 later converted to meters above sea level, calibrated to July 2020
 measurements, and combined with 1m<sup>2</sup> digital
 elevation models (DEMs, downloaded from SLU geodataportalen-Lantmäteriet
 on 2023-02-28) of each wetland (QGIS, ver. 3.26.3). By combining water
 levels and DEM pixel values we calculated wetland flood zone areas around
 the entire wetland, inundation frequency in a 10m radius around the SLAM 
 trap. We also calculated the maximum number of days the water level was
 above half way between the average water level and the SLAM trap and the
 maximum number of days the water level was below the lower 5%-percentile
 as maximum high- and low-water table duration. 
 <strong>Vegetation height and grazing
 management</strong> When performing vacuum
 collections of arthropods during August 2020, we also measured the maximum
 vegetation height at each collection point from which we calculated the
 average maximum vegetation height, and grazing management was determined
 by presence or absence of grazing livestock around each wetland.
description: # Data for: Hydrological dynamics, wetland morphology and vegetation
 structure determine riparian arthropod communities in constructed
 wetlands.
 [https://doi.org/10.5061/dryad.2280gb62c](https://doi.org/10.5061/dryad.2280gb62c) ## Description of the data and file structure **Files and variables** #### File: dat\_orders.txt **Description:** Data on arthropod abundance on order level ##### Variables * loc - Site ID - inund - [%] inundation frequency across all days in 10m radius around SLAM trap - l_flood - Calculated total wetland flood zone area [m2] (log-transformed) - l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) - grazing - Presence or absence of grazing livestock [Yes/No] - high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level -  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap - low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level * avg_veg_height - Average highest vegetation height across the three vacuum collection points Responses [abundances in taxa] - Araneae - Coleoptera - Diptera - Hemiptera - Hymenoptera (total) - Lepidoptera  - Megaloptera - Trichoptera - Hym - Abundance of parasitic wasps - Form - Abundance of Formicidae #### File: dat\_spiders.txt **Description:** Data on spider abundance on family level ##### Variables * loc - Site ID - inund - [%] inundation frequency across all days in 10m radius around SLAM trap - l_flood - Calculated total wetland flood zone area [m2] (log-transformed) - l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) - grazing - Presence or absence of grazing livestock [Yes/No] - high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level -  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap - low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level * avg_veg_height - Average highest vegetation height across the three vacuum collection points Responses [abundances in taxa] - Clubionidae - Linyphiidae - Lycosidae - Tetragnathidae #### File: dat\_beetles.txt **Description:** Data on beetle abundance on family level ##### Variables * loc - Site ID - inund - [%] inundation frequency across all days in 10m radius around SLAM trap - l_flood - Calculated total wetland flood zone area [m2] (log-transformed) - l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) - grazing - Presence or absence of grazing livestock [Yes/No] - high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level -  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap - low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level * avg_veg_height - Average highest vegetation height across the three vacuum collection points Responses [abundances in taxa] - Carabidae - Chrysomelidae - Curculionidae - Hydrophilidae - Staphylinidae #### File: dat\_brach.txt **Description:** Data on brachyceran abundance on family level ##### Variables * loc - Site ID * inund - [%] inundation frequency across all days in 10m radius around SLAM trap * l_flood - Calculated total wetland flood zone area [m2] (log-transformed) * l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) * grazing - Presence or absence of grazing livestock [Yes/No] * high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level *  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap * low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level - avg_veg_height - Average highest vegetation height across the three vacuum collection points Responses [abundances in taxa] * Dolichopodidae * Empididae * Hybotidae #### File: dat\_nemat.txt **Description:** Data on nematoceran abundance on family level ##### Variables * loc - Site ID - inund - [%] inundation frequency across all days in 10m radius around SLAM trap - l_flood - Calculated total wetland flood zone area [m2] (log-transformed) - l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) - grazing - Presence or absence of grazing livestock [Yes/No] - high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level -  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap - low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level * avg_veg_height - Average highest vegetation height across the three vacuum collection points Responses [abundances in taxa] - Chironomidae - Psychodomorpha - Sciaridae - Tipulidomorpha #### File: dat\_hemi.txt **Description:** Data on Hemiptera abundance on group level ##### Variables * loc - Site ID * inund - [%] inundation frequency across all days in 10m radius around SLAM trap * l_flood - Calculated total wetland flood zone area [m2] (log-transformed) * l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) * grazing - Presence or absence of grazing livestock [Yes/No] * high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level *  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap * low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level - avg_veg_height - Average highest vegetation height across the three vacuum collection points Responses [abundances in taxa] * Auchenorrhyncha * Heteroptera #### File: dat\_hymen.txt **Description:** Data on Hymenoptera abundance on group level ##### Variables * loc - Site ID * inund - [%] inundation frequency across all days in 10m radius around SLAM trap * l_flood - Calculated total wetland flood zone area [m2] (log-transformed) * l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) * grazing - Presence or absence of grazing livestock [Yes/No] * high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level *  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap * low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level - avg_veg_height - Average highest vegetation height across the three vacuum collection points Responses [abundances in taxa] * Apocrita * Formicidae #### File: dat\_genus.txt **Description:** Data on abundances within generea ##### Variables * loc - Site ID * inund - [%] inundation frequency across all days in 10m radius around SLAM trap * l_flood - Calculated total wetland flood zone area [m2] (log-transformed) * l_elv - Difference in altitude between water surface and SLAM trap [m] (log-transformed) * grazing - Presence or absence of grazing livestock [Yes/No] * high_wl_ampl - Water level amplitude, mean water level subtracted from 95%-percentile water level *  high_wl_max - Maximum consecutive days water level was higher than half way between mean water level and the altitude of the SLAM trap * low_wl_max - Maximum consecutive days water level was lower than the 5%-percental water level - avg_veg_height - Average highest vegetation height across the three vacuum collection points\ Responses [abundances in taxa] * *Hypomma* * *Tenuiphantes* * *Erigone* * *Piratula* * *Pirata* * *Stenus* * *Tachyporus* * *Coelostoma* * *Cercyon* * *Hilara* * *Rhamphomyia* * *Erioptera* * *Tipula* #### File: dat\_flood.txt **Description:** Data on calculated flood zone area to compare with observed flooded grassland area, containing higher taxonomic abundances ##### Variables * loc - Site ID * l_flood - Calculated total wetland flood zone area [m2] (log-transformed) * l_fldgrs - Measured flooded grassland area [m2] ( log-transformed) Responses [abundances in taxa] * Araneae * Coleoptera * Diptera * Hemiptera * Hym - Parasitic wasps * Form - Formicidae * Lepidoptera * Megaloptera * Trichoptera ## Code/software All analyses were run in R version 4.2.1, and requires packages: * tidyverse * car * mvabund * multcompView * MASS * ggcorrplot The accompanying script file contains the full final model workflow