Citation:

PANGAEA.852716

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Abstract:

The SES_GR2-Mesozooplankton faecal pellet production rates dataset is based on samples taken during August and September 2008 in the Northern Libyan Sea, Southern Aegean Sea and the North-Eastern Aegean Sea. Mesozooplankton is collected by vertical tows within the 0–100 m layer or within the Black sea water body mass layer in the case of the NE Aegean, using a WP-2 200 µm net equipped with a large non-filtering cod-end (10 l). Macrozooplankton organisms are removed using a 2000 µm net. A few unsorted animals (approximately 100) are placed inside several glass beaker of 250 ml filled with GF/F or 0.2 µm Nucleopore filtered seawater and with a 100 µm net placed 1 cm above the beaker bottom. Beakers are then placed in an incubator at natural light and maintaining the in situ temperature. After 1 hour pellets are separated from animals and placed in separated flasks and preserved with formalin. Pellets are counted and measured using an inverted microscope. Animals are scanned and counted using an image analysis system.

Carbon- Specific faecal pellet production is calculated from a) faecal pellet production, b) individual carbon: Animals are scanned and their body area is measured using an image analysis system. Body volume is then calculated as an ellipsoid using the major and minor axis of an ellipse of same area as the body. Individual carbon is calculated from a carbon- total body volume of organisms (relationship obtained for the Mediterranean Sea by Alcaraz et al. (2003) divided by the total number of individuals scanned and c) faecal pellet carbon: Faecal pellet length and width is measured using an inverted microscope. Faecal pellet volume is calculated from length and width assuming cylindrical shape. Conversion of faecal pellet volume to carbon is done using values obtained in the Mediterranean from: a) faecal pellet density 1,29 g cm**3 (or pg µm**3) from Komar et al. (1981); b) faecal pellet DW/WW=0,23 from Elder and Fowler (1977) and c) faecal pellet C%DW=25,5 Marty et al. (1994).

Further details:

Alcaraz, Miguel; Saiz, Enric; Calbet, Albert; Broglio, Elisabetta (2003): Estimating zooplankton biomass through image analysis. Marine Biology, 143(2), 307-315, https://doi.org/10.1007/s00227-003-1094-8

Fowler, Scott W (1977): Trace elements in zooplankton particulate products. Nature, 269(5623), 51-53, https://doi.org/10.1038/269051a0

Komar, Paul D; Morse, Alan P; Small, Lawrence F; Fowler, Scott W (1981): An analysis of sinking rates of natural copepod and euphausiid fecal pellets. Limnology and Oceanography, 26(1), 172-180, https://doi.org/10.4319/lo.1981.26.1.0172

Marty, Jean-Claude; Nicolas, E; Miquel, Juan Carlos; Fowler, Scott W (1994): Particulate fluxes of organic compounds and their relationship to zooplankton fecal pellets in the northwestern Mediterranean Sea. Marine Chemistry, 46(4), 387-405, https://doi.org/10.1016/0304-4203(94)90034-5

Project(s):

Southern European Seas: Assessing and Modelling Ecosystem Changes (SESAME)

Funding:

Sixth Framework Programme (FP6), grant/award no. 36949 : Southern European Seas: Assessing and Modelling Ecosystem Changes

Coverage:

Median Latitude: 36.447542 * Median Longitude: 24.340497 * South-bound Latitude: 34.559330 * West-bound Longitude: 20.850830 * North-bound Latitude: 40.269170 * East-bound Longitude: 26.006160

Date/Time Start: 2008-08-29T15:30:00 * Date/Time End: 2008-09-07T05:20:00

Minimum DEPTH, water: 15 m * Maximum DEPTH, water: 50 m

Event(s):

SES_GR2-00A1b_WP2 (00A1b) * Latitude: 40.269170 * Longitude: 25.235000 * Date/Time: 2008-09-07T05:20:00 * Location: Mediterranean Sea * Campaign: * Basis: Aegaeo * Method/Device: WP-2 towed closing plankton net (WP2) * Comment: WP-2 closing net and Multinet (Hydrobios) equipped by 5 nets The net was checked after every tow for any damage. All nets closed properly.

SES_GR2-0A10c_WP2 (0A10c) * Latitude: 36.077000 * Longitude: 25.270000 * Date/Time: 2008-09-04T06:35:00 * Location: Mediterranean Sea * Campaign: * Basis: Aegaeo * Method/Device: WP-2 towed closing plankton net (WP2) * Comment: WP-2 closing net and Multinet (Hydrobios) equipped by 5 nets The net was checked after every tow for any damage. All nets closed properly.

SES_GR2-0I05d_WP2 (0I05d) * Latitude: 34.884670 * Longitude: 20.850830 * Date/Time: 2008-08-29T15:30:00 * Location: Mediterranean Sea * Campaign: * Basis: Aegaeo * Method/Device: WP-2 towed closing plankton net (WP2) * Comment: WP-2 closing net and Multinet (Hydrobios) equipped by 5 nets The net was checked after every tow for any damage. All nets closed properly.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Moncheva, Snejana
2	Optional event label	Event 2		Moncheva, Snejana
3	Date/Time of event	Date/Time		Moncheva, Snejana
4	Latitude of event	Latitude		Moncheva, Snejana
5	Longitude of event	Longitude		Moncheva, Snejana
6	Depth, top/min	Depth top	m	Moncheva, Snejana
7	Depth, bottom/max	Depth bot	m	Moncheva, Snejana
8	DEPTH, water	Depth water	m	Moncheva, Snejana		Geocode
9	Fecal pellet production rate per individual	Fecal pel pro/ind	#/#/h	Moncheva, Snejana	Measured/Determined	of copepoda
10	Fecal pellet production as carbon	Fecal pel pro C	mg/g/h	Moncheva, Snejana	Computed/Converted	of copepoda

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

16 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Event 2	3 Date/Time	4 Latitude	5 Longitude	7 Depth bot [m]	8 Depth water [m]	9 Fecal pel pro/ind [#/#/h]	10 Fecal pel pro C [mg/g/h]
SES_GR2-0I05d_WP2	0I05d	2008-08-29T15:30	34.8847	20.8508	100	50	0.15	0.80
SES_GR2-0L02c_WP2	0L02c	2008-09-01T10:50	34.5593	26.0062	100	50	0.15	0.50
SES_GR2-0A10c_WP2	0A10c	2008-09-04T06:35	36.0770	25.2700	40	20	0.21	0.41
SES_GR2-00A1b_WP2	00A1b	2008-09-07T05:20	40.2692	25.2350	30	15	0.58	4.20