ERDDAP > info > bcodmo_dataset_701987

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	Green crab size based predation trials conducted in laboratory mesocosms at Romberg Tiburon Center, Tiburon, CA in 2015		I   M	background			BCO-DMO	bcodmo_dataset_701987

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv
attribute	NC_GLOBAL	acquisition_description	String	We conducted short-term size-based predation (=cannibalism) experiments in which five smaller green crabs were placed in a laboratory mesocosm with a large adult green crab.\u00a0Size ratios of large to small crabs were experimentally varied using adult crabs of three size classes and juvenile crabs as small as were available representing recent recruits. Adult crabs were starved for 48 hours prior to the trial.\u00a0Alternate prey in the form of small clams were also available in the mesocosms.\u00a0Experiments were run for 24 hours after which are remaining crabs were retrieved and remeasured. All crabs were collected from Seadrift Lagoon, CA.\u00a0 See Turner et al. (2016)\u00a0Biological Invasions\u00a018: 533-548 for additional methodological details: Turner, B.C., de Rivera, C.E., Grosholz, E.D., & Ruiz, G.M. 2016. Assessing population increase as a possible outcome to management of invasive species. Biological Invasions, 18(2), pp 533\u2013548. doi:[10.1007/s10530-015-1026-9](\\"https://dx.doi.org/10.1007/s10530-015-1026-9\\")
attribute	NC_GLOBAL	awards_0_award_nid	String	699764
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1514893
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1514893
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Predation Trials PI: Edwin Grosholz (UC Davis) Co-PI: Catherine de Rivera & Gregory Ruiz (Portland State University) Version: 05 June 2017
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2017-06-05T20:10:14Z
attribute	NC_GLOBAL	date_modified	String	2020-01-21T21:49:24Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.701987.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/701987
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, data, dataset, date, dmo, erddap, found, management, notes, number, oceanography, office, origin, point, predator, predator_size, preliminary, prey, prey_found, prey_size_1, prey_size_2, prey_size_3, prey_size_4, prey_size_5, size, tank, tank_number, time, time2, time_point, trial, trial_number, tub, tub_number
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/701987/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/701987
attribute	NC_GLOBAL	param_mapping	String	{'701987': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/701987/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of California-Davis
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	UC Davis
attribute	NC_GLOBAL	people_0_person_name	String	Edwin Grosholz
attribute	NC_GLOBAL	people_0_person_nid	String	699768
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	Portland State University
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	PSU
attribute	NC_GLOBAL	people_1_person_name	String	Catherine de Rivera
attribute	NC_GLOBAL	people_1_person_nid	String	699771
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	Portland State University
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	PSU
attribute	NC_GLOBAL	people_2_person_name	String	Gregory Ruiz
attribute	NC_GLOBAL	people_2_person_nid	String	471603
attribute	NC_GLOBAL	people_2_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_2_role_type	String	originator
attribute	NC_GLOBAL	people_3_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_3_person_name	String	Shannon Rauch
attribute	NC_GLOBAL	people_3_person_nid	String	51498
attribute	NC_GLOBAL	people_3_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_3_role_type	String	related
attribute	NC_GLOBAL	project	String	Invasive_predator_harvest
attribute	NC_GLOBAL	projects_0_acronym	String	Invasive_predator_harvest
attribute	NC_GLOBAL	projects_0_description	String	The usual expectation is that when populations of plants and animals experience repeated losses to predators or human harvest, they would decline over time. If instead these populations rebound to numbers exceeding their initial levels, this would seem counter-intuitive or even paradoxical. However, for several decades mathematical models of population processes have shown that this unexpected response, formally known as overcompensation, is not only possible, but even expected under some circumstances. In what may be the first example of overcompensation in a marine system, a dramatic increase in a population of the non-native European green crab was recently observed following an intensive removal program. This RAPID project will use field surveys and laboratory experiments to verify that this population explosion results from overcompensation. Data will be fed into population models to understand to what degree populations processes such as cannibalism by adult crabs on juvenile crabs and changes in maturity rate of reproductive females are contributing to or modifying overcompensation. The work will provide important insights into the fundamental population dynamics that can produce overcompensation in both natural and managed populations. Broader Impacts include mentoring graduate trainees and undergraduate interns in the design and execution of field experiments as well as in laboratory culture and feeding experiments. The project will also involve a network of citizen scientists who are involved with restoration activities in this region and results will be posted on the European Green Crab Project website. This project aims to establish the first example of overcompensation in marine systems. Overcompensation refers to the paradoxical process where reduction of a population due to natural or human causes results in a greater equilibrium population than before the reduction. A population explosion of green crabs has been recently documented in a coastal lagoon and there are strong indications that this may be the result of overcompensation. Accelerated maturation of females, which can accompany and modify the expression of overcompensation has been observed. This RAPID project will collect field data from this unusual recruitment class and conduct targeted mesocosm experiments. These will include population surveys and mark-recapture studies to measure demographic rates across study sites. Laboratory mesocosm studies using this recruitment class will determine size specific mortality. Outcomes will be used in population dynamics models to determine to what degree overcompensation has created this dramatic population increase. The project will seek answers to the following questions: 1) what are the rates of cannibalism by adult green crabs and large juveniles on different sizes of juvenile green crabs, 2) what are the consequences of smaller size at first reproduction for population dynamics and for overcompensation and 3) how quickly will the green crab population return to the levels observed prior to the eradication program five years earlier?
attribute	NC_GLOBAL	projects_0_end_date	String	2016-11
attribute	NC_GLOBAL	projects_0_geolocation	String	Europe
attribute	NC_GLOBAL	projects_0_name	String	RAPID: A rare opportunity to examine overcompensation resulting from intensive harvest of an introduced predator
attribute	NC_GLOBAL	projects_0_project_nid	String	699765
attribute	NC_GLOBAL	projects_0_start_date	String	2014-12
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Green crab size based predation trials conducted in laboratory mesocosms at Romberg Tiburon Center, Tiburon, CA in 2015.
attribute	NC_GLOBAL	title	String	Green crab size based predation trials conducted in laboratory mesocosms at Romberg Tiburon Center, Tiburon, CA in 2015
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	trial_number		byte
attribute	trial_number	_FillValue	byte	127
attribute	trial_number	actual_range	byte	2, 10
attribute	trial_number	bcodmo_name	String	exp_id
attribute	trial_number	colorBarMaximum	double	100.0
attribute	trial_number	colorBarMinimum	double	0.0
attribute	trial_number	description	String	Trial number (2-10)
attribute	trial_number	long_name	String	Trial Number
attribute	trial_number	units	String	unitless
variable	time_point		byte
attribute	time_point	_FillValue	byte	127
attribute	time_point	actual_range	byte	0, 3
attribute	time_point	bcodmo_name	String	time_point
attribute	time_point	description	String	Observation points 1-3
attribute	time_point	long_name	String	Time Point
attribute	time_point	units	String	unitless
variable	date		String
attribute	date	bcodmo_name	String	date
attribute	date	description	String	Calendar date (yyyy-mm-dd)
attribute	date	long_name	String	Date
attribute	date	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	date	source_name	String	date
attribute	date	time_precision	String	1970-01-01
attribute	date	units	String	unitless
variable	tank_number		byte
attribute	tank_number	_FillValue	byte	127
attribute	tank_number	actual_range	byte	1, 9
attribute	tank_number	bcodmo_name	String	tank
attribute	tank_number	colorBarMaximum	double	100.0
attribute	tank_number	colorBarMinimum	double	0.0
attribute	tank_number	description	String	Number identifying the tank. There was one tank for each set of one predator and five prey crabs, with three tanks in each of three larger tubs
attribute	tank_number	long_name	String	Tank Number
attribute	tank_number	units	String	unitless
variable	tub_number		String
attribute	tub_number	bcodmo_name	String	tank
attribute	tub_number	description	String	Number identifying the tub. There were three tubs each containing three tanks.
attribute	tub_number	long_name	String	Tub Number
attribute	tub_number	units	String	unitless
variable	predator_size		byte
attribute	predator_size	_FillValue	byte	127
attribute	predator_size	actual_range	byte	7, 82
attribute	predator_size	bcodmo_name	String	width
attribute	predator_size	description	String	Carapace width of single large crab in millimeters
attribute	predator_size	long_name	String	Predator Size
attribute	predator_size	units	String	millimeters (mm)
variable	origin		String
attribute	origin	bcodmo_name	String	origin
attribute	origin	description	String	Collection location of crabs
attribute	origin	long_name	String	Origin
attribute	origin	units	String	unitless
variable	time2		String
attribute	time2	bcodmo_name	String	time
attribute	time2	description	String	Time of observation for 'time point' in Pacific time (HHMM)
attribute	time2	long_name	String	Time
attribute	time2	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/
attribute	time2	units	String	unitless
variable	prey_found		byte
attribute	prey_found	_FillValue	byte	127
attribute	prey_found	actual_range	byte	0, 5
attribute	prey_found	bcodmo_name	String	count
attribute	prey_found	description	String	Number of prey crabs recorded at time point (NA at time zero because crabs were added then)
attribute	prey_found	long_name	String	Prey Found
attribute	prey_found	units	String	unitless
variable	prey_size_1		byte
attribute	prey_size_1	_FillValue	byte	127
attribute	prey_size_1	actual_range	byte	6, 48
attribute	prey_size_1	bcodmo_name	String	width
attribute	prey_size_1	description	String	Carapace width of prey crab #1
attribute	prey_size_1	long_name	String	Prey Size 1
attribute	prey_size_1	units	String	millimeters (mm)
variable	prey_size_2		byte
attribute	prey_size_2	_FillValue	byte	127
attribute	prey_size_2	actual_range	byte	6, 54
attribute	prey_size_2	bcodmo_name	String	width
attribute	prey_size_2	description	String	Carapace width of prey crab #2
attribute	prey_size_2	long_name	String	Prey Size 2
attribute	prey_size_2	units	String	millimeters (mm)
variable	prey_size_3		byte
attribute	prey_size_3	_FillValue	byte	127
attribute	prey_size_3	actual_range	byte	6, 49
attribute	prey_size_3	bcodmo_name	String	width
attribute	prey_size_3	description	String	Carapace width of prey crab #3
attribute	prey_size_3	long_name	String	Prey Size 3
attribute	prey_size_3	units	String	millimeters (mm)
variable	prey_size_4		byte
attribute	prey_size_4	_FillValue	byte	127
attribute	prey_size_4	actual_range	byte	5, 52
attribute	prey_size_4	bcodmo_name	String	width
attribute	prey_size_4	description	String	Carapace width of prey crab #4
attribute	prey_size_4	long_name	String	Prey Size 4
attribute	prey_size_4	units	String	millimeters (mm)
variable	prey_size_5		byte
attribute	prey_size_5	_FillValue	byte	127
attribute	prey_size_5	actual_range	byte	6, 51
attribute	prey_size_5	bcodmo_name	String	width
attribute	prey_size_5	description	String	Carapace width of prey crab #5
attribute	prey_size_5	long_name	String	Prey Size 5
attribute	prey_size_5	units	String	millimeters (mm)
variable	notes		String
attribute	notes	bcodmo_name	String	comment
attribute	notes	description	String	Additional comments about crabs
attribute	notes	long_name	String	Notes
attribute	notes	units	String	unitless

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.