Free-living marine nematodes from San Julián Bay (Santa Cruz, Argentina).

The free-living marine nematodes of San Julián Bay dataset is based on sediment samples collected in January 2009 during the project PICT AGENCIA-FONCYT 2/33345-2005. A total of 36 samples have been taken at three locations in the San Julián Bay, Santa Cruz Province, Argentina on the coastal littoral at three tidal levels. This presents a unique and important collection for the nematode benthic biodiversity assessment as this area remains one of the least known regions in Patagonia. In total 10,030 specimens of free-living marine nematodes belonging to 2 classes, 9 orders, 35 families, 78 genera and 125 species were collected. The San Julián city site presented a very high species richness.

Data published through

GBIF: http://www.gbif.org/dataset/06df03fc-8973-490c-af74-089fffae9e24

Taxonomic coverage description

This is the first study on nematodes performed on a sub-Antarctic salt marsh along the coast of Santa Cruz Province, Argentina with a growing human impact (oil ventures, mining, aquaculture and tourism). The objectives of the study were to collect, identify and discover the structure and diversity of nematode community of San Julián Bay. The coverage (Figure 1) of this dataset includes two classes: (82%) and (18%); nine orders: with (36%), followed by (15%) and (13%) as those of main occurrences and thirty-five families (see Figure 1).

Figure 1.

Taxonomic coverage by class, order and family.

Taxonomic ranks

Kingdom:

Phylum:

Class: ,

Order: , , , , , , , ,

Family: , , , , , , , , , , , , , , , , , , , , , , , , .

Genera: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , .

Species with higher occurrences: , , , , , , , , , , .

Spatial coverage

General spatial coverage: San Julián Bay, Santa Cruz Province, Argentina (Figure 2). For this study three sites were selected: “La pingüinera”(M), at the bay entrance, “La Rural” (C) in front of San Julián city and “El Rincón” (E) at the end of the bay. At each sampling site, three tidal levels were chosen: upper-littoral, high tide, salt-marsh habitat (u); middle littoral, mean tide, un-vegetated habitat (m) and low littoral, low tide, un-vegetated habitat (l) (Figure 3).

Figure 2.

Spatial coverage. San Julián Bay, Argentina. Sites: M = “La pingüinera”, C = “La Rural”, E = “El Rincón”. Levels = u, m, i.

Figure 3.

San Julián Bay, Argentina. Views from the sampling sites. A, B “La pingüinera” (M) C “La Rural”(C) D “El Rincón” (D).

Coordinates: La pingüinera: Mu = 49°16'15.24"S; 67°42'40.68"W; Mm = 49°16'12"S; 67°42'43.92"W; Ml = 49°16'11.28"S; 67°42'39.6"W. La Rural: Cu = 49°18'37.44"S; 67°42'55.8"W; Cm = 49°18'34.92"S; 67°42'55.8"W; Cl = 49°18'35.28"S; 67°42'52.56"W. El Rincón: Eu = 49°21'18.72"S; 67°41'26.88"W; Em = 49°21'14.4"S; 67°41'42.36"W; El = 49°21'18"S; 67°41'51"W.

Temporal coverage

11–13 January 2009.

Methods

Sampling description: At each site and level location, four replicates (20 ml) were sampled with a PVC syringe (60 ml, inner diameter 2.9 cm) and separated by a distance of 5-10 m each: four for marine nematodes counts, two for organic matter and two for sediment analyses. Each sample was fixed in situ, with a solution of 5% formaldehyde in filtered sea water with the addition of Rose Bengal tint.

Marine nematodes were extracted from samples using the elutriation/decantation LUDOX TM (colloidal silica polymer) method at a specific gravity of 1.15, quanPageBreaktifying only organisms passing through a 500 µm mesh and then retained by a 63 µm mesh. Samples were evaporated to anhydrous glycerol and permanent slides made (Somerfield and Warwick 1996).

The taxonomic classification followed proposed by De Ley and Blaxter (2004). For the identification of species international keys (Platt and Warwick 1983, Platt and Warwick 1988, Warwick et al. 1998, Lorenzen 1994, Abebe et al. 2006) and previous taxonomical papers for Santa Cruz nematodes (Pastor de Ward 1978, 1980, 1984a, b, c, d, e, 1985, 1986, 1988, 1989, 1990, 1991, 1993, 1994, 1995a, b, 1996, 1998a, b, c, 1999, Pastor de Ward and Lo Russo 2009, Villares and Pastor de Ward 2012, Villares et al. 2013, Pastor de Ward et al. 2013) were used.

Project details

Project title: “Evaluación del impacto urbano en costas areno-limosas de la provincia de Santa Cruz, usando métodos rápidos de análisis de cambios en estructura comunitaria del bentos.” [Impact assessment in urban sand-clay coastal areas of Santa Cruz Province, using methods of rapid assessment in changes of nematodes community structure].

Personnel: Catalina Pastor de Ward (Project Director, meio-benthos specialist); Héctor Zaixso (Project Co-director, macro-benthos specialist), Virginia Lo Russo (Field work, nematodes identification, data collection and analysis), Gabriela Villares (Data PageBreakcollection and analysis), Viviana Milano (Grant student, data input), Lidia Miyashiro (Darwin core data input), Renato Mazzanti (Software engineer, data base manager).

Funding: PICT AGENCIA-FONCYT 2/33345-2005

Study extent description: The San Julián Bay marine nematodes is a dataset that gives new insights on the taxonomic and geographic distribution of south Atlantic marine nematodes, covering an under-explored region of the southern Atlantic coasts. This is the first study on marine nematodes in this locality. This dataset presents species occurrences and species richness of the individual free-living marine nematodes present at three coastal areas (La pingüinera; La Rural; El Rincón) of the San Julián Bay at three different tidal levels (upper, middle and low-littoral).

In total 10,030 specimens of free-living marine nematodes belonging to 2 classes, 9 orders, 35 families, 78 genera and 125 species were collected.

Quality control description: The geo-referencing of all specimens were recorded using a Garmin eTrex Legend GPS (WGS84 Datum) with an accuracy of less than 10 m and with at least 5 satellites.

The taxonomic identification of specimens, scientific names, and their current accurate spelling were verified by C. Pastor de Ward, a free-living marine nematode specialist. Other post-validation procedures (including geographic coordinate format, congruence between collection and identification dates, absence of ASCII anomalous characters) were checked using the Darwin Test software (http://www.gbif.es/darwin_test/Darwin_Test_in.php).

Dataset description

Object name: Darwin Core Archive free-living marine Nematodes from San Julián Bay (Santa Cruz, Argentina)

Character encoding: UTF-8

Format name: Darwin Core Archive format

Format version: 1.0

Distribution: http://www.cenpat-conicet.gov.ar:8080/ipt-2.0.3/resource.do?r=sjnem

Publication date of data: 2013-10-17

Language: English

Licenses of use: This work is licensed under a Creative Commons CC0 1.0 License http://creativecommons.org/publicdomain/zero/1.0/legalcode

External datasets

Object name: Centro Nacional Patagónico (CENPAT-CONICET)

Distribution: http://www.cenpat-conicet.gov.ar:8080/ipt-2.0.3/resource.do?r=sjnem

Object name: Ministerio de Ciencia y Tecnología de Argentina (Sistema Nacional de Datos Biológicos - SNDB)

Distribution: GBIF: http://www.gbif.org/dataset/06df03fc-8973-490c-af74-089fffae9e24

Formatted: English (U.K.)

Field Code Changed

Metadata language: English

Date of metadata creation: 2013-10-17

Hierarchy level: Dataset

Table 1.

Collected species.

Genera and species	Family	Order	Class
Odontophora peritricha Wieser, 1956	Axonolaimidae	Araeolaimida	Chromadorea
Hopperia americana Pastor de Ward, 1984	Comesomatidae	Araeolaimida	Chromadorea
Hopperia arntzi Chen & Vincx, 1998	Comesomatidae	Araeolaimida	Chromadorea
Laimella sp. 1	Comesomatidae	Araeolaimida	Chromadorea
Laimella sp. 2	Comesomatidae	Araeolaimida	Chromadorea
Sabatieria sp. 1	Comesomatidae	Araeolaimida	Chromadorea
Sabatieria sp. 2	Comesomatidae	Araeolaimida	Chromadorea
Sabatieria mortenseni (Ditlevsen, 1921)	Comesomatidae	Araeolaimida	Chromadorea
Sabatieria wieseri Platt, 1985	Comesomatidae	Araeolaimida	Chromadorea
Campylaimus gerlachi Timm, 1961	Diplopeltidae	Araeolaimida	Chromadorea
Campylaimus sp. 1	Diplopeltidae	Araeolaimida	Chromadorea
Chromadora nudicapitata Bastian, 1865	Chromadoridae	Chromadorida	Chromadorea
Chromadorella circumflexa Wieser, 1954	Chromadoridae	Chromadorida	Chromadorea
Prochromadora argentinensis Pastor de Ward, 1984	Chromadoridae	Chromadorida	Chromadorea
Dichromadora sp. 1	Chromadoridae	Chromadorida	Chromadorea
Neochromadora lineata Pastor de Ward, 1985	Chromadoridae	Chromadorida	Chromadorea
Neochromadora papillosa Pastor de Ward, 1985	Chromadoridae	Chromadorida	Chromadorea
Neochromadora sp. 1	Chromadoridae	Chromadorida	Chromadorea
Spilophorella paradoxa (De Man, 1888)	Chromadoridae	Chromadorida	Chromadorea
Marylynnia quadriseta (Wieser, 1954)	Cyatholaimidae	Chromadorida	Chromadorea
Paracanthonchus longispiculum Pastor de Ward, 1985	Cyatholaimidae	Chromadorida	Chromadorea
Paracyatholaimus chilensis Gerlach, 1953	Cyatholaimidae	Chromadorida	Chromadorea
Pomponema tautraense (Allgén, 1933)	Cyatholaimidae	Chromadorida	Chromadorea
Paraethmolaimus dahli (Gerlach, 1953)	Ethmolaimidae	Chromadorida	Chromadorea
Gomphionema sp. 1	Neotonchidae	Chromadorida	Chromadorea
Neotonchus sp. 1	Neotonchidae	Chromadorida	Chromadorea
Halichoanolaimus ovalis Ditlevsen, 1921	Selachinematidae	Chromadorida	Chromadorea
Molgolaimus minutus Jensen, 1978	Desmodoridae	Desmodorida	Chromadorea
Molgolaimus sp. 1	Desmodoridae	Desmodorida	Chromadorea
Polysigma sp. 1	Desmodoridae	Desmodorida	Chromadorea
Spirinia septentrionalis (Cobb, 1914)	Desmodoridae	Desmodorida	Chromadorea
Bolbolaimus sp. 1	Microlaimidae	Desmodorida	Chromadorea
Bolbolaimus sp. 3	Microlaimidae	Desmodorida	Chromadorea
Microlaimus capillaris Gerlach, 1957	Microlaimidae	Desmodorida	Chromadorea
Microlaimus conothelis (Lorenzen, 1973)	Microlaimidae	Desmodorida	Chromadorea
Microlaimus cyatholaimoides Gerlach, 1957	Microlaimidae	Desmodorida	Chromadorea
Microlaimus decoratus Pastor de Ward, 1991	Microlaimidae	Desmodorida	Chromadorea
Microlaimus gerlachi Wieser, 1954	Microlaimidae	Desmodorida	Chromadorea
Microlaimus globiceps De Man, 1880	Microlaimidae	Desmodorida	Chromadorea
Microlaimus sp. 1	Microlaimidae	Desmodorida	Chromadorea
Desmolaimus sp. 1	Linhomoeidae	Monhysterida	Chromadorea
Desmolaimus sp. 2	Linhomoeidae	Monhysterida	Chromadorea
Metalinhomoeus gloriae Pastor de Ward, 1989	Linhomoeidae	Monhysterida	Chromadorea
Metalinhomoeus parafiliformis Pastor de Ward, 1989	Linhomoeidae	Monhysterida	Chromadorea
Metalinhomoeus typicus De Man, 1907	Linhomoeidae	Monhysterida	Chromadorea
Terschellingia distalamphida Juario, 1974	Linhomoeidae	Monhysterida	Chromadorea
Terschellingia longicaudata De Man, 1907	Linhomoeidae	Monhysterida	Chromadorea
Terschellingia sp. 1	Linhomoeidae	Monhysterida	Chromadorea
Terschellingia sulfidrica Pastor de Ward, 1989	Linhomoeidae	Monhysterida	Chromadorea
Paralinhomoeus aridus Pastor de Ward, 1989	Linhomoeidae	Monhysterida	Chromadorea
Paralinhomoeus pachyamphis Wieser, 1956	Linhomoeidae	Monhysterida	Chromadorea
Paralinhomoeus visitus Pastor de Ward, 1989	Linhomoeidae	Monhysterida	Chromadorea
Siphonolaimus auratus Wieser, 1956	Siphonolaimidae	Monhysterida	Chromadorea
Diplolaimella gerlachi Pastor de Ward, 1984	Monhysteridae	Monhysterida	Chromadorea
Diplolaimelloides oschei Meyl, 1954	Monhysteridae	Monhysterida	Chromadorea
Diplolaimelloides tehuelchus Pastor de Ward & Lo Russo, 2009	Monhysteridae	Monhysterida	Chromadorea
Diplolaimelloides warwicki Pastor de Ward & Lo Russo, 2009	Monhysteridae	Monhysterida	Chromadorea
Halomonhystera disjuncta (Bastian, 1865)	Monhysteridae	Monhysterida	Chromadorea
Halomonhystera sp. 1	Monhysteridae	Monhysterida	Chromadorea
Halomonhystera sp. 2	Monhysteridae	Monhysterida	Chromadorea
Halomonhystera sp. 3	Monhysteridae	Monhysterida	Chromadorea
Thalassomonhystera parva (Bastian, 1865)	Monhysteridae	Monhysterida	Chromadorea
Thalassomonhystera refringens (Bresslau & Stekhoven, 1935)	Monhysteridae	Monhysterida	Chromadorea
Sphaerolaimus pacificus Allgen 1947	Sphaerolaimidae	Monhysterida	Chromadorea
Sphaerolaimus pentasetus Pastor de Ward, 1984	Sphaerolaimidae	Monhysterida	Chromadorea
Subsphaerolaimus sp. 1	Sphaerolaimidae	Monhysterida	Chromadorea
Amphimonhystera sp. 1	Xyalidae	Monhysterida	Chromadorea
Daptonema concordiense Pastor de Ward, 1985	Xyalidae	Monhysterida	Chromadorea
Daptonema laxus Wieser, 1956	Xyalidae	Monhysterida	Chromadorea
Daptonema lopezi Pastor de Ward, 1985	Xyalidae	Monhysterida	Chromadorea
Daptonema rectangulatum Pastor de Ward, 1985	Xyalidae	Monhysterida	Chromadorea
Daptonema sp. 1	Xyalidae	Monhysterida	Chromadorea
Linhystera longa Pastor de Ward, 1985	Xyalidae	Monhysterida	Chromadorea
Metadesmolaimus sp. 1	Xyalidae	Monhysterida	Chromadorea
Metadesmolaimus sp. 2	Xyalidae	Monhysterida	Chromadorea
Paramonohystera megacephala (Steiner, 1916)	Xyalidae	Monhysterida	Chromadorea
Paramonohystera parabutschlii Timm, 1961	Xyalidae	Monhysterida	Chromadorea
Paramonohystera sp. 1	Xyalidae	Monhysterida	Chromadorea
Paramonohystera sp. 2	Xyalidae	Monhysterida	Chromadorea
Paramonohystera sp. 3	Xyalidae	Monhysterida	Chromadorea
Pseudosteineria anticipans Wieser, 1956	Xyalidae	Monhysterida	Chromadorea
Steineria pilosa Cobb, 1914	Xyalidae	Monhysterida	Chromadorea
Theristus modicus Wieser, 1956	Xyalidae	Monhysterida	Chromadorea
Theristus sp. 1	Xyalidae	Monhysterida	Chromadorea
Haliplectus salicornius Pastor de Ward, 1984	Haliplectidae	Plectida	Chromadorea
Cyartonema flexile Cobb, 1920	Aegialoalaimidae	Plectida	Chromadorea
Camacolaimus barbatus Warwick, 1970	Leptolaimidae	Plectida	Chromadorea
Deontolaimus papillatus De Man, 1880	Leptolaimidae	Plectida	Chromadorea
Antomicron alveolatum Villares & Pastor de Ward, 2012	Leptolaimidae	Plectida	Chromadorea
Leptolaimoides sp. 1	Leptolaimidae	Plectida	Chromadorea
Leptolaimoides sp. 2	Leptolaimidae	Plectida	Chromadorea
Leptolaimus gabinoi Villares & Pastor de Ward, 2012	Leptolaimidae	Plectida	Chromadorea
Leptolaimus puccinelliae Gerlach, 1959	Leptolaimidae	Plectida	Chromadorea
Leptolaimus sebastiani Vitiello, 1974	Leptolaimidae	Plectida	Chromadorea
Paramicrolaimus spirulifer Wieser, 1959	Paramicrolaimidae	Plectida	Chromadorea
Mesorhabditis sp. 1	Mesorhabditidae	Rhabditida	Chromadorea
Aphelenchoides sp. 1	Aphelenchoididae	Rhabditida	Chromadorea
Panagrolaimus sp. 1	Panagrolaimidae	Rhabditida	Chromadorea
Boleodorus sp. 1	Neotylenchidae	Rhabditida	Chromadorea
Tylenchorhynchus sp. 1	Tylenchidae	Rhabditida	Chromadorea
Tylenchus sp. 1	Tylenchidae	Rhabditida	Chromadorea
Dorylaimus sp. 1	Dorylaimidae	Dorylaimida	Enoplea
Eudorylaimus sp. 1	Dorylaimidae	Dorylaimida	Enoplea
Chaetonema sp. 1	Anoplostomatidae	Enoplida	Enoplea
Thoracostomopsis sp. 1	Thoracostomopsidae	Enoplida	Enoplea
Dolicholaimus marioni De Man, 1888	Ironidae	Enoplida	Enoplea
Syringolaimus smarigdus Cobb, 1928	Ironidae	Enoplida	Enoplea
Halalaimus (Halalaimus) setosus Timm, 1961	Oxystominidae	Enoplida	Enoplea
Halalaimus (Nuada) diacros Mawson, 1958	Oxystominidae	Enoplida	Enoplea
Halalaimus sp. 3	Oxystominidae	Enoplida	Enoplea
Halalaimus floridanus Keppner, 1992	Oxystominidae	Enoplida	Enoplea
Thalassoalaimus sp. 1	Oxystominidae	Enoplida	Enoplea
Wieseria sp. 1	Oxystominidae	Enoplida	Enoplea
Calyptronema maxweberi (De Man, 1922)	Enchelidiidae	Enoplida	Enoplea
Eurystomina sp. 1	Enchelidiidae	Enoplida	Enoplea
Adoncholaimus sp. 1	Enchelidiidae	Enoplida	Enoplea
Oncholaimellus paracarlbergi Pastor de Ward, 1993	Oncholaimidae	Enoplida	Enoplea
Viscosia macramphida Chitwood, 1951	Oncholaimidae	Enoplida	Enoplea
Viscosia separabilis (Wieser, 1953)	Oncholaimidae	Enoplida	Enoplea
Oncholaimus salobrus Pastor de Ward, 1993	Oncholaimidae	Enoplida	Enoplea
Rhabdocoma sp. 1	Trefusiidae	Enoplida	Enoplea
Bathylaimus australis Cobb, 1894	Tripyloididae	Enoplida	Enoplea
Tripyloides amazonicus (Gerlach, 1957)	Tripyloididae	Enoplida	Enoplea
Trichodorus sp. 1	Trichodoridae	Triplonchida	Enoplea
Pandolaimus sp. 1	Pandolaimidae	Triplonchida	Enoplea