Data from: Substantial pulses of aquatic insects emerge from tidal freshwaters along the James River Estuary, Virginia, USA

# Data from: Substantial pulses of aquatic insects emerge from tidal freshwaters along the James River Estuary, Virginia, USA The dataset *emergenceDataProcessed.csv* includes standardized biomass and density estimates (m-2 d-1) for each emergent insect taxon collected during the sampling period, as well as covariates used in downstream modeling of insect emergence rates, organized by sample collection (CollectionID). The dataset *emergenceData_daily.csv* expands standardized biomass and density estimates (m-2 d-1) to include each emergent insect taxon on each day at each trap during the sampling period, as well as covariates used in downstream modeling of insect emergence rates. Daily estimates can be summed to obtain emergence estimates over longer time periods (e.g., annual estimates, peak emergence estimates). This dataset is created from emergenceDataProcessed.csv and is the input dataset for insect emergence models. ## Description of the data and file structure ###### *emergenceDataProcessed.csv* Each **CollectionID** (specified as TrapID_CollectionDate) has 7 records, corresponding to the taxa collection during this study. **Taxa** is one of 7 taxa identified: Diptera_Nematocera, Ephemeroptera_Pannota, Ephemeroptera_Schistonota, Odonata_Anisoptera, Odonata_Zygoptera, Plecoptera, or Trichoptera. **TrapID** includes site and trap number. Each site had 13 emergence traps. **StartDateTime** refers to the date and time of trap/sample deployment and is usually the same as the previous collection EndDateTime. Exceptions occur for new trap deployments following instances of missing or damaged traps. StartDateTime == NA if a new trap was deployed for a CollectionID (i.e., trap was not in place during previous collection period). **EndDateTime** refers to the date and time of sample collection. Date matches the the CollectionDate in CollectionID. EndDateTime == NA if trap was missing or sample was unusable (e.g., filled with river water, insects not well preserved) for a particular CollectionID. **Duration** in days for a sample collection, calculated using EndDateTime - StartDateTime. Duration == NA if either StartDateTime or EndDateTime is missing. **Site** of trap location is Deep Bottom Park (DB) or Rice Rivers Center (RC). **Latitude** of trap location in decimal degrees. **Longitude** of trap location in decimal degrees. **Inundation** refers to whether the trap rested on sediment at low tide (Intertidal) or was always over water (Subtidal). **Placement** refers to whether the trap was located at the confluence of the creek and estuarine shoreline (Confluence) or at a point along the tidal creek (Creek). **Distance_10m** is the distance to the nearest 10m of the trap to the confluence with the estuarine shoreline. Distance was estimated on ArcGIS Pro and was measured along stream length. Traps with Placement == Confluence have Distance_10m == 0. **BiomassSqmDay** is the standardized biomass estimate (m-2 d-1) for a collection. If a taxon was not collected in a valid sample (i.e., emergent insects were absent in sample), the the corresponding BiomassSqmDay == 0. If there was not a valid sample for a taxon (i.e., sample compromised, missing data), the corresponding BiomassSqmDay == -1. **CountSqmDay** is the standardized density estimate (m-2 d-1) for a collection. If a taxon was not collected in a valid sample (i.e., emergent insects were absent in sample), the the corresponding CountSqmDay == 0. If there was not a valid sample for a taxon (i.e., sample compromised, missing data), the corresponding CountSqmDay == -1. ###### ###### *emergenceData\_daily.csv* **Taxa** is one of 7 taxa identified: Diptera_Nematocera, Ephemeroptera_Pannota, Ephemeroptera_Schistonota, Odonata_Anisoptera, Odonata_Zygoptera, Plecoptera, or Trichoptera. **TrapID** includes site and trap number. Each site had 13 emergence traps. **Site** of trap location is Deep Bottom Park (DB) or Rice Rivers Center (RC). **Inundation** refers to whether the trap rested on sediment at low tide (Intertidal) or was always over water (Subtidal). **Placement** refers to whether the trap was located at the confluence of the creek and estuarine shoreline (Confluence) or at a point along the tidal creek (Creek). **Distance_10m** is the distance to the nearest 10m of the trap to the confluence with the estuarine shoreline. Distance was estimated on ArcGIS Pro and was measured along stream length. Traps with Placement == Confluence have Distance_10m == 0. **BiomassSqmDay** is the standardized biomass estimate (m-2 d-1) for a specific day. If a taxon was not collected in a valid sample (i.e., emergent insects were absent in sample), the the corresponding BiomassSqmDay == 0. If there was not a valid sample for a taxon (i.e., sample compromised, missing data), the corresponding BiomassSqmDay == NA. **CountSqmDay** is the standardized density estimate (m-2 d-1) for a specific day. If a taxon was not collected in a valid sample (i.e., emergent insects were absent in sample), the the corresponding CountSqmDay == 0. If there was not a valid sample for a taxon (i.e., sample compromised, missing data), the corresponding CountSqmDay == NA. **endDate** is the date that the estimated emergence occurred (YYYY-MM-DD). Each date within the sampling period (2019-04-07 to 2019-11-08) is included.