Dataset: Predation intensity on marine invertebrate communities across latitude observed using underwater video

Name: Predation intensity on marine invertebrate communities across latitude observed using underwater video (Competition and Predation across Latitude)
Published: 2021-10-13
Keywords: marine invertebrate, predation, latitude, fish, nearshore, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.863158.1

Spatial Extent: N:55.4726 E:-79.5218 S:8.9128 W:-131.797

Temporal Extent: 2014-10-14 - 2017-09-30

Project:

Community Effects of Competition and Predation across Latitude and Implications for Species Invasions (Competition and Predation across Latitude)

Principal Investigator:

Amy L. Freestone (Temple University, Temple)

Co-Principal Investigator:

Gregory E. Ruiz (Smithsonian Environmental Research Center, SERC)

Mark E. Torchin (Smithsonian Tropical Research Institute , STRI)

Scientist:

Laura J. Jurgens (Temple University, Temple)

Carmen Schlöder (Smithsonian Tropical Research Institute , STRI)

Student:

Mariana Bonfim (Temple University, Temple)

Diana Paola López (Temple University, Temple)

Michele F. Repetto (Temple University, Temple)

Contact:

Amy L. Freestone (Temple University, Temple)

BCO-DMO Data Manager:

Sawyer Newman (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2021-10-13

Restricted:

Release Date:

2021-08-30

Validated:

Yes

Current State:

Final no updates expected

Predation intensity on marine invertebrate communities across latitude observed using underwater video (Competition and Predation across Latitude)

Abstract:

Predation intensity recorded from exposed prey communities at coastal sites across a latitudinal gradient spanning the subarctic to the tropics. Invertebrate communities developed under low predation for three or 12 months within cages. Mature prey communities were then exposed to ambient predation, with a high definition camera recording all predation events during the diurnal period over three days of exposure. This experiment provided an assessment of predation intensity (and predator identity) to complement predator exclusion experiments that measured impact of predators on prey community assembly.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2021-10-13	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.863158.1	2022-04-18

Description

Methods & Sampling

Methodology:

Marine invertebrate communities (prey) developed on PVC settlement panels (14 x 14 cm) hung on floating docks one meter below the water surface at local marinas at three coastal sites in each region (Alaska, California, Mexico, Panama). Communities developed for three or 12 months under reduced predation (in cages). Caging materials had a mesh size of 0.635 cm. Prey communities were temporarily retrieved, then re-deployed without a cage in the same location where they developed. A GoPro camera was mounted a fixed distance from the panel for a short-term, three-day experiment to test the intensity of ambient predation on prey communities.

Sampling and analytical procedures:

Following the assigned development period, prey communities were temporarily retrieved and brought back to a laboratory for assessment. Cages were removed and prey communities were re-deployed in their original location. Panels were attached to one end of an experimental apparatus with a high definition camera mounted 0.4m from the panel. Each panel/camera was mounted to an individual apparatus and deployed separately for five replicates per site per time period. Cameras recorded during the diurnal period for each day of the three-day exposure, with continuous video filming in the morning period (~7am-12pm) and timelapse images (1-second interval) in the afternoon (~12pm-5pm) in all regions. 4 hours of continuous video from the morning and 2 hours of timelapse footage (from the latest available time of day) was viewed, with data collected for each potential predator visit. A predator visit was defined as any mobile predator species (ie. fish) entering a zone one-half the width of the panel around all sides. Each row of data corresponds to a single predator visit on a prey community. Due to the nature of timelapse images, quantitative strike data is only recorded from continuous video footage. Blank fields or "nd" indicate NA values.

Data Processing Description

BCO-DMO Processing Notes:

Changed dates to YYYY-MM-DD format
Removed "mo" string from Deploy_duration column
Removed "Day" string from Exposure_day column
Removed "%" string from Size_relative column
Replaced "," with ";" in Notes column

Data Files

File
i_predexp_3mo12mo_videotimelapse_bvarchive_14jun21-1.csv (Comma Separated Values (.csv), 903.81 KB) MD5:d77295d6a63f2a9b1dc4122d6399b9be Primary data file for dataset ID 863158

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1434528

Deployments

None available yet

Instruments

Grooved PVC settlement plate

Supplied Name: PVC settlement panels

Supplied Description:

Marine invertebrates recruited onto PVC settlement panels (14 x 14cm) that were hung face down on floating docks one meter below the water surface at local marinas at three coastal sites in each region (Alaska, California, Mexico, Panama). Panels were exchanged every two weeks with clean panels for 12 months.

Instrument Type

Generic Name: Grooved PVC settlement plate

Generic Description:

An artificial colonization substrate made of a sheet of PVC with engraved lines to roughen its surface. It is used to determine the extent of colonization and/or the diversity of settled organisms in a marine or artificial environment.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Region	Region where experiment was conducted (Alaska, California, Mexico, Panama)	unitless	region
Site_code	Unique site abbreviation	unitless	Site_ID
Site_name	Complete site name	unitless	Site_ID
Latitude	Latitude of site where predation was observed. Negative values indicate South.	decimal degrees	lat
Longitude	Longitude of site where predation was observed. Negative values indicate West.	decimal degrees	lon
Deploy_duration	Length of prey community developmental period (3 or 12-month)	number of months	duration
Plate_ID	Unique panel (prey community) reference number	unitless	sample
Exposure_date	Date of video recording. Format: YYYY-MM-DD. Format: %Y-%m-%d	unitless	date
Exposure_day	Day of video recording (days 1-3) from three-day exposure experiment	unitless	day
Video_type	continuous = continuous video footage; timelapse = time-lapse images captured every one second	unitless	sample_type
Time_interval	AM = morning; PM3 = late afternoon, PM2 = early/mid afternoon	unitless	time
Hours_processed	total hours processed per video segment (decimal hours)	hours	time_sample
Predator_common_name	Common name of predator species observed from video	unitless	common_name
Predator_scientific_name	Scientific name of predator species observed from video	unitless	taxon
Size_relative	estimated size (total length) of predator; reported as % of panel width per visit; panel size is 14x14cm; to convert to estimated length (cm), DIVIDE column by 100 for decimal value, then MULTIPLY by 14 (cm panel length)	cm	fish_len
Duration_seconds	duration of visit per predator taxa	seconds	duration
Strike_Y_N	Y = visit resulted in predator strike; N = no strike observed during predator visit	unitless	behav_code
Predator_indiv	alphabetically assigned per video per predator species; new individual label assigned each time the same (or new) species exits/enters the field of view	unitless	individual
Prey_taxon_1	lowest taxonomic description identified for first prey target identified from single visit	unitless	taxon
Strikes_number1	total strikes observed on Prey_taxon_1	unitless	count
Prey1_consumed_Y_N	Y = consumption was observed; N = organism was removed during strike but consumption not observed; for Prey_taxon_1	unitless	behav_code
Prey_taxon_2	lowest taxonomic description identified for second prey target identified from single visit	unitless	taxon
Strikes_number2	total strikes observed on Prey_taxon_2	unitless	count
Prey2_consumed_Y_N	Y = consumption was observed; N = organism was removed during strike but consumption not observed; for Prey_taxon_2	unitless	behav_code
Prey_taxon_3	lowest taxonomic description identified for third prey target identified from single visit	unitless	taxon
Strikes_number3	total strikes observed on Prey_taxon_3	unitless	count
Prey3_consumed_Y_N	Y = consumption was observed; N = organism was removed during strike but consumption not observed; for Prey_taxon_2	unitless	behav_code
Strikes_total	total number of predator strikes observed during visit across all prey items	unitless	count
Notes	additional notes recorded during video processing	unitless	comment

Database

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Dataset: Predation intensity on marine invertebrate communities across latitude observed using underwater video