Dataset: Zoo_DMC_2007-2011

Name: Abundance and composition of zooplankton communities at the Darling Marine Center Monitoring stations collected on R/V Ira in the Damariscotta Estuary from 2007 to 2011 (DMC project)
Published: 2015-04-30
Keywords: biota, oceans

Cite This Dataset

Spatial Extent: N:44 E:-69.5 S:43.57 W:-69.58

Project:

Darling Marine Center Monitoring Time Series (DMC)

Principal Investigator:

Jeffrey A. Runge (University of Maine)

Contact:

Cameron Thompson (University of Maine)

BCO-DMO Data Manager:

Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

close to final

Version Date:

2015-04-30

Restricted:

Validated:

Current State:

Final with updates expected

Data URL:

https://www.bco-dmo.org/dataset/557360/data

Abundance and composition of zooplankton communities at the Darling Marine Center Monitoring stations collected on R/V Ira in the Damariscotta Estuary from 2007 to 2011 (DMC project)

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Description

This dataset describes the abundance and composition of the zooplankton community at two Darling Marine Center monitoring stations. Sampling was biweekly from 2008 (one in 2007) to 2011.

This display has all the species/stages in one column and the abundances in another column. Second display has species as column headers and abundances in all columns. These two datasets are identical in content but displayed differently for different emphasis. Second display: Columnar view

Acquisition Description

Zooplankton were collected from two vertical hauls using a 0.75 meter ring net with 222 um mesh with 5:1 ratio of wire out to depth during the upcast with the winch going 40 meters/minute.

A flowmeter at the mouth of the ring net recorded the start and end of each cast.

The collection in the cod end of the net was transferred to 500 ml jars and the samples were buffered in a 4% formaldehyde solution.

Processing Description

Back in the lab, the zooplankton samples were split in half using Folsom Plankton Splitter. Half of the sample was archived for abundance analysis of meso-zooplankton species. Target N of organisms counted was 200. All copepods were identified to species and staged. All other animals were identified to family or to species where possible. The Calanus finmarchicus target N was 75-100 where few stages were present or 150-200 where many stages were present.

The remaining half of the sample was rinsed of its preservative by sieving through a nitex mesh filter made of the net used in sampling. The mesh filters were pre-weighed for subtraction from the sample material weight.

The sample was then rinsed with 100 ml of freshwater to remove salts and placed in a clean, pre-weighed petri dish. It was then placed in a 65C oven (Precision Econotherm Lab Oven) for 48 hours for drying

Dried samples are then weighed to the nearest 0.001 gram on PG403-S Delta Range Mettler Toledo precision scale

Zooplankton abundance (#/m2) was calculated by first determining the #/m3 and then multiplying by net depth. The abundance (#/m3) = (the count *dilution factor/ split / volume filtered). Dilution factor = the dilution/aliquot; volume filtered = ring net mouth area (m2)* distance (M); distance is measured by the flowmeter.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0815336
University of Maine	unknown DMC University of Maine
Maine Department of Marine Resources	unknown DMC Maine Department of Natural Resources

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
IC_DMC_2007-2011	DMC_TS	2007-09-13	R/V Ira C.		data info

Instruments

Plankton sub-sampler

Supplied Name: Folsom Plankton Splitter

Supplied Description:

Device for splitting a plankton sample into two approximately equal parts. It uses a hollow cylindrical drum mounted to rotate on a horizontal axis with a semi-circular divider midway between the end walls of the drum.

Instrument Type

Generic Name: Plankton sub-sampler

Generic Description:

Various devices for sub-sampling plankton samples

Folsom splitter: http://www.aquaticresearch.com/folsom_plankton_splitter.htm

Motoda box splitter: http://www.aquaticresearch.com/motodo_plankton_splitter.htm

Hensen Stempel Pippette: http://www.envcoglobal.com/catalog/product/plankton-counting/hensen-stem...

Sedgewick-Rafter Plankton Counting Chamber: http://www.benmeadows.com/wildco-sedgewick-rafter-counting-chambers_3681...

Ring Net

Supplied Description:

0.75 meters with 202 micron mesh hauled vertically with 5:1 ratio of wire out to depth

Instrument Type

Generic Name: Ring Net

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/22/

Generic Description:

A Ring Net is a generic plankton net, made by attaching a net of any mesh size to a metal ring of any diameter. There are 1 meter, .75 meter, .25 meter and .5 meter nets that are used regularly. The most common zooplankton ring net is 1 meter in diameter and of mesh size .333mm, also known as a 'meter net' (see Meter Net).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
station	DMC-1 or DMC-2	text	station
depth_w	depth of water at this station	meters	depth_w
lat	latitude	decimal degrees; North is positive	lat
lon	longitude	decimal degrees; West is negative	lon
sample_id	IC for R/V Ira C; followed by the date (mmddyy)and DMC and the station number and sample half	text	sample
cruise	each deployment has its own cruise ID following this format: IC for R/V Ira C; followed by the date (mmddyy)and DMC	text	cruise_id
date_local	date local time	mmddyyyy	date_local
month_local	month local time	mm	month_local
day_local	day local time	dd	day_local
year	year	yyyy	year
yrday_local	day of year	numeric	yrday_local
cast	cast number	n	cast
depth_net	depth of the ring net according to length of wire out of the winch; as read by a meter wheel	meters	depth
vol_filt	volume filtered determined from net mouth area (m2) and calibrated flow meter distance (m)	cubic meters	vol_filt
split	portion of sample	ratio	unknown
dilution	lab dilution	ml	unknown
aliquot	aliquot size	ml	unknown
aliquot_calfin	Calanus finmarchicus aliquot	ml	unknown
species_stage	genus and species binomial identification of the animal collected; includes life stage	text	species
abundance	abundance in the water column	numbers per square meter	abundance

Database

Geospatial Access

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Dataset: Zoo_DMC_2007-2011