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| griddap | Subset | tabledap | Make A Graph | wms | files | Accessible | Title | Summary | FGDC | ISO 19115 | Info | Background Info | RSS | Institution | Dataset ID | |
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| log in | [Scallop Density Surveys] - Scallop density survey data across landscape fragmentation per se treatments in June, July, and August 2019 in Back Sound, NC (Collaborative Research: Habitat fragmentation effects on fish diversity at landscape scales: experimental tests of multiple mechanisms) | This dataset contains metadata and data for scallop density surveys across landscape fragmentation per se treatments in June, July, and August 2019. These data were collected as part of the following study published in Yarnall et al. (2024):\n\nTo explore the independent influence of fragmentation per se (patchiness) on mobile juvenile bay scallop (Argopecten irradians) density, we constructed 16 artificial seagrass unit (ASU) landscapes, consisting of four replicates each of four treatments. Fragmentation per se treatments consisted of three levels of patchiness while maintaining consistent total ASU area. We also examined the effect of patch-scale position on scallop densities. \n\nFreely mobile juvenile scallops were placed at a consistent density (indiv. m-2) across landscapes for three density survey trials, one each during June, July, and August 2019. Observers snorkel surveyed each landscape at 24 h, 48 h, and 72 h during each trail, and recorded the number of scallops per ASU.\n\nData were collected by Drs. F. Joel Fodrie and Amy H. Yarnall for the Estuarine Ecology Laboratory of the University of North Carolina at Chapel Hill's Institute of Marine Sciences.\n\ncdm_data_type = Other\nVARIABLES:\nSite_ID (unitless)\nLandscape (unitless)\nNum_patches (count)\nFootprint (unitless)\nRep_letter (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nDate_check (unitless)\nMonth (unitless)\nCheck_num (unitless)\nTime_check (unitless)\n... (14 more variables)\n | BCO-DMO | bcodmo_dataset_939617_v1 | ||||||||||||
| log in | [Scallop Survival Assays] - Data from scallop survival assays conducted as part of a larger concurrent study of fragmentation effects on estuarine faunal communities with Artificial Seagrass Units (ASU) in Back Sound, NC from July to September 2018 (Collaborative Research: Habitat fragmentation effects on fish diversity at landscape scales: experimental tests of multiple mechanisms) | This dataset contains metadata and data from scallop survival assays conducted in 2018 (assays across landscape area x fragmentation per se treatments) as part of the following study published in Yarnall et al. (2024):\n\nTo parse the influences of fragmentation components on scallop survival, we generated nine unique landscapes composed of artificial seagrass units (ASUs), were constructed to mimic Zostera marina. These landscapes were part of a larger-scale concurrent experiment, during which we examined seagrass fragmentation effects on estuarine faunal communities (Yarnall et al. In Press). Landscapes were designed to be treatments along orthogonal axes of seagrass percent cover of the landscape footprint (10%, 35%, 60%) and fragmentation per se, indexed by percolation probability (0.1, 0.35, 0.59). \nRelative scallop survival was measured by deploying tethered juvenile bay scallops in two density treatments. Five 24-h survival assay trials were conducted from July to September 2018. During each survival assay, observers snorkel surveyed tethers and recorded the number of live and dead scallops per treatment. \n\nData were collected by Drs. F. Joel Fodrie and Amy H. Yarnall for the Estuarine Ecology Laboratory of the University of North Carolina at Chapel Hill's Institute of Marine Sciences.\n\ncdm_data_type = Other\nVARIABLES:\nSite_ID (unitless)\nPer_cov (percent (%))\nFrag (unitless)\nlatitude (degrees_north)\nlongitude (degrees_east)\nDate_In (unitless)\nTime_In (unitless)\ntime (Iso_datetime_utc_in, seconds since 1970-01-01T00:00:00Z)\nCheck_num (unitless)\nDate_check (unitless)\n... (20 more variables)\n | BCO-DMO | bcodmo_dataset_939581_v1 |