Dataset: Asteroids and Holothurians - Table 2 - Holothurian species - Number of individuals by station
Deployment: DSBD_NAtl

Asteroids and Holothurians - Table 2 - Holothurian species - Number of individuals by station

Lead Principal Investigator:

Michael Rex (University of Massachusetts Boston, UMass Boston)

Co-Principal Investigator:

Solange Brault (University of Massachusetts Boston, UMass Boston)

Carol Stuart (University of Massachusetts Boston, UMass Boston)

Contact:

Michael Rex (University of Massachusetts Boston, UMass Boston)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Reproductive and Geographic Evidence for Source-Sink Dynamics in Deep-Sea Benthic Communities (Deep Sea Benthic Dynamics)

Current State:

Preliminary and in progress

Version:

31 August 2015

Version Date:

2015-08-31

Data URL:

https://www.bco-dmo.org/dataset-deployment/565144/data

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Description

Holothurians: Table 2. Holothurian species, number of individuals by station

Data tables for:
Wagstaff, M., Howell, K.L., Bett, B. J., Billett, D. S. M., Brault, S., Stuart, C. T. & Rex, M. (2014) β-diversity of deep-sea holothurians and asteroids along a bathymetric gradient (NE Atlantic). Marine Ecology Progress Series, 508,177–185.

Taxonomic Note
Zoroaster longicauda = Zoroaster fulgens (long armed morph) of Howell et al 2004**
Zoroaster fulgens (robust morph) = Zoroaster fulgens (robust morph) of Howell et al 2004**
Zoroaster fulgens (slender morph) = Zoroaster fulgens (slender morph) of Howell et al 2004**

**Howell, K.L., Rogers, A., Tyler, P.A. and Billett, D.S.M. (2004). Reproductive isolation among morphotypes of the cosmopolitan species Zoroaster fulgens (Asteroidea:Echinodermata).

Methods & Sampling

Dataset acquisition description

We compare depth distributions, and β-diversity of holothurians and asteroids collected from the Porcupine Seabight (PSB) and Porcupine Abyssal Plain (PAP) in the eastern North Atlantic. The data represent 160 and 209 epibenthic sledge and semi-balloon otter trawl samples for holothurians and asteroids respectively taken from 1977 to 1998 as part of the Institute of Oceanographic Sciences Biology Programme in the PSB (Rice et al. 1991) and the BENGAL Program in the PAP (Billett & Rice 2001). The samples include 43 species of holothurians (Billett 1991) and 43 species of asteroids (Howell et al. 2002).

We performed analyses of nested order by applying BINMATNEST (Rodríguez-Gironés & Santamaría 2006. Baselga (2010, 2012) showed that β-diversity, can be decomposed into 2 terms: dissimilarity resulting from turnover (spatial replacement) and dissimilarity attributed to nestedness. We used these measures to examine the differences in composition between 2 sites (pair-wise dissimilarity). To determine the general trend in species composition over all depths, we performed non-metric multi-dimensional scaling (NMDS) on species presence absence matrices (Bray-Curtis dissimilarity index scaling) using the metaMDS function in R.

Baselga A (2010) Partitioning the turnover and nestedness components of β diversity. Glob Ecol Biogeogr 19: 134−143

Baselga A (2012) The relationship between species replacement, dissimilarity derived from nestedness, and nestedness. Glob Ecol Biogeogr 21: 1223−1232

Billett DSM (1991) Deep-sea holothurians. Oceanogr Mar Biol Annu Rev 29: 259−317

Billett DSM, Rice AL (2001) The BENGAL programme: introduction and overview. Prog Oceanogr 50: 13−25

Howell KL, Billett DS, Tyler PA (2002) Depth-related distribution and abundance of seastars (Echinodermata: Asteroidea) in the Porcupine Seabight and Porcupine Abyssal Plain, NE Atlantic. Deep-Sea Res I 49: 1901−1920

Rice AL, Billett DSM, Thurston MH, Lampitt RS (1991) The Institute of Oceanographic Sciences biology programme in the Porcupine Seabight: background and general introduction. J Mar Biol Assoc UK 71: 281−310

Rodríguez-Gironés MA, Santamaría L (2006) A new algorithm to calculate the nestedness temperature of presence-absence matrices. J Biogeogr 33: 924−935

Wagstaff, M., Howell, K.L., Bett, B. J., Billett, D. S. M., Brault, S., Stuart, C. T. & Rex, M. (2014) β-diversity of deep-sea holothurians and asteroids along a bathymetric gradient (NE Atlantic). Marine Ecology Progress Series, 508,177–185.

Gear code Gear type
BN1.5/3F Epibenthic sled
BN1.5/3M Epibenthic sled
BN1.5/C Epibenthic sled
BN1.5/P Epibenthic sled
BNC Epibenthic sled
BNF Epibenthic sled
GT Otter trawl
OT Otter trawl
OTSB14 Otter trawl
OTSB14D Otter trawl
ST Otter trawl

Data Processing Description

Dataset Processing Description

BCO-DMO Processing Notes
- Generated from original file "Data Asteroid Holothurian for Wagstaff et al paper 2014.xlsx, Sheet 2" contributed by Carol Stuart
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- Date reformatted to YYYYMMDD
- Misc dates corrected (mis-entered originally)

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1129612	NSF Division of Ocean Sciences

Instruments

CTD - profiler

Supplied Name: CTD Profiler

Supplied Description:

Temperature and Salinity ranges from collection of CTD cast datasets obtained during sampling period with the Porcupine Seabight and highlights intrusion of Mediterranean Outflow Water

Instrument Type

Generic Name: CTD - profiler

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/130/

Generic Description:

The Conductivity, Temperature, Depth (CTD) unit is an integrated instrument package designed to measure the conductivity, temperature, and pressure (depth) of the water column. The instrument is lowered via cable through the water column. It permits scientists to observe the physical properties in real-time via a conducting cable, which is typically connected to a CTD to a deck unit and computer on a ship. The CTD is often configured with additional optional sensors including fluorometers, transmissometers and/or radiometers. It is often combined with a Rosette of water sampling bottles (e.g. Niskin, GO-FLO) for collecting discrete water samples during the cast.

This term applies to profiling CTDs. For fixed CTDs, see https://www.bco-dmo.org/instrument/869934.

Epibenthic Sled

Supplied Description:

Instrument Type

Generic Name: Epibenthic Sled

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/24/

Generic Description:

An epibenthic sled is a semi-quantitative bottom-sampling device designed to trawl just above the bottom at the sediment water interface (the epibenthic zone). The sled consists of a rectangular steel frame with a mesh net (often more than one) attached to it. Towed along the ocean floor, its weight scrapes into the benthos, collecting any organisms on the surface or in the first few centimeters of sediment. It also collects the organisms in the water column just above the benthos.

Descriptions from WHOI and Census of Marine Life.

Otter Trawl

Supplied Description:

Instrument Type

Generic Name: Otter Trawl

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/61/

Generic Description:

Otter trawls have large rectangular otter boards which are used to keep the mouth of the trawl net open. Otter boards are made of timber or steel and are positioned in such a way that the hydrodynamic forces, acting on them when the net is towed along the seabed, pushes them outwards and prevents the mouth of the net from closing. The speed that the trawl is towed at depends on the swimming speed of the species which is being targeted and the exact gear that is being used, but for most demersal species, a speed of around 4 knots (7 km/h) is appropriate. More: http://en.wikipedia.org/wiki/Bottom_trawling

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Station	Station Id - IOS station number	text	station
Gear	Type of gear used for sampling Gear code Gear type BN1.5/3F Epibenthic sled BN1.5/3M Epibenthic sled BN1.5/C Epibenthic sled BN1.5/P Epibenthic sled BNC Epibenthic sled BNF Epibenthic sled GT Otter trawl OT Otter trawl OTSB14 Otter trawl OTSB14D Otter trawl ST Otter trawl	text	sampling_method
Date	Date of sampling	YYYYMMDD	date
Latitude	Latitude position of sample (South is negative)	dec degs	lat
Longitude	Longitude position of sample (West is negative)	dec degs	lon
Mid_Depth	Estimated mid-(mean) depth of sample	meters	depth
Temperature_Range	Temperature range From collection of CTD cast datasets obtained during sampling period with the Porcupine Seabight	degs Celsius	temp
Salinity_Range	Salinity range From collection of CTD cast datasets obtained during sampling period with the Porcupine Seabight	psu	sal
Count_Species	Number of specimens within a species for the sample	integer	count_species

Database

Contribute Data

Dataset: Asteroids and Holothurians - Table 2 - Holothurian species - Number of individuals by station
Deployment: DSBD_NAtl

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Asteroids and Holothurians - Table 2 - Holothurian species - Number of individuals by stationDeployment: DSBD_NAtl

Dataset acquisition description

Dataset Processing Description

Dataset: Asteroids and Holothurians - Table 2 - Holothurian species - Number of individuals by station
Deployment: DSBD_NAtl