First record of a sea spider (Pycnogonida) from an anchialine habitat

Álvarez, Fernando; Ojeda, Margarita

doi:10.3856/vol46-issue1-fulltext-21

Cited by 6 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In that site, there was also the only record of Pycnogonida that is generally recognized as a marine taxon. Pycnogonida have a few representatives in the meiofauna, but the Anoplodactylus genus has some species that ranges in the meiofaunal body size and are also tolerant to salinity variations until values comparable to those found in C2 (11 PSU) [64].…”

Section: Discussionmentioning

confidence: 99%

Meiofaunal Dynamics and Heterogeneity along Salinity and Trophic Gradients in a Mediterranean Transitional System

Semprucci

Gravina

Magni

2019

Water

View full text Add to dashboard Cite

The spatiotemporal variation in meiofaunal assemblages were investigated for the first time in the Cabras Lagoon, the largest transitional system in the Sardinian Island (W-Mediterranean Sea). Two main environmental (salinity and trophic) gradients highlighted a significant separation of the three study sites across the lagoon, which were consistent through time. The environmental variability and habitat heterogeneity of the Cabras Lagoon influenced the meiofauna. In particular, salinity and dissolved oxygen, primarily, shaped the meiofaunal assemblage structure at the seaward site which was significantly different from both the riverine and the organically enriched sites. On the other hand, the trophic components (e.g., organic matter, Chlorophyll-a, and phaeopigments) and the different degrees of confinement and saprobity among sites were the secondary factors contributing mostly to the separation between the latter two sites. The lack of significant differences in the temporal comparison of the meiofaunal assemblage structure along with the very low contribution of temperature to the meiofaunal ordination indicated that this assemblage was more affected by spatial rather than by temporal variation. This pattern was also supported by significant differences between the three sites in several univariate measures, including total number of individuals, number of taxa, Pielou’s evenness, and the ratio between nematodes and copepods. Thus, the present study corroborates the hypothesis that meiofaunal organisms are good indicators of the spatial heterogeneity in transitional waters (TWs) and could have a greater species richness than that expected. Indeed, the Cabras Lagoon overall showed one of the highest meiofaunal richness values found from both Mediterranean and European TWs.

show abstract

Section: Discussionmentioning

confidence: 99%

Meiofaunal Dynamics and Heterogeneity along Salinity and Trophic Gradients in a Mediterranean Transitional System

Semprucci

Gravina

Magni

2019

Water

View full text Add to dashboard Cite

show abstract

“…The anchialine cave systems of the world have been intensely studied during the last three decades since their discovery and the improvement of diving techniques to explore them (Iliffe 2018, Iliffe and. The vast majority of studies so far conducted with anchialine fauna are of a taxonomic nature, often with descriptions of new species, or presenting new distributional records (Alvarez and Ojeda 2018, Iliffe and Alvarez 2018, Alvarez et al 2015, 2019. Although basic ecological questions are of great importance, few studies have been published regarding the population dynamics of key species, trophic interactions and seasonal variations in diversity and abundance in these environments (Pohlman et al 1997, Havird et al 2015, Brankovits et al 2017.…”

Section: Introductionmentioning

confidence: 99%

How is the anchialine fauna distributed within a cave? A study of the Ox Bel Ha System, Yucatan Peninsula, Mexico

Benítez¹,

Illife²,

Quiroz‐Martínez³

et al. 2019

Self Cite

View full text Add to dashboard Cite

A study describing the diversity and distribution pattern of the stygobitic fauna in the Ox Bel Ha anchialine cave system adjacent to the Caribbean coast of the Yucatan Peninsula, Mexico is presented. A total of 15 species of crustaceans were collected in three surveys at four points situated along a 10.2 km transect perpendicular to the coast line. A freshwater mass dominated throughout the transect with a halocline that appeared progressively deeper, from 10 to 18 m, with increasing distance from the coast. All the recorded species, except for one, occurred throughout the transect with no defined pattern. Abundance and species richness did not vary significantly with distance from the coast, whereas diversity (H') peaked in the second sampling site at 3.17 km from the coast. As expected, most of the organisms occurred only in the freshwater layer, except for the remipede Xibalbanus tulumensis (Yager, 1987) that was found always at or below the halocline, and five other species that were found above and below the halocline. In the horizontal scale, species composition and occurrence mixed without a defined pattern, both, for sampling dates and sites. The results show that the analyzed fauna is distributed throughout the 10.2 km transect without showing any defined horizontal zonation pointing to a high connectivity among all sections. Due to the high connectivity within the caves in the area, it is expected that significant variation in species composition and distribution will be found at a larger regional scale.

show abstract

“…Further exploration of the intertidal rocky shores of the coasts of Veracruz confirmed the presence of Achelia sawayai Marcus, 1940and Anoplodactylus californicus Hall, 1912(Vasallo et al, 2014, whereas Anoplodactylus batangensis (Helfer, 1938) was discovered in anchialine waters in Yucatán (Alvarez and Ojeda, 2018), and a new record for Baja California Sur (BCS), Eurycyde bamberi De León-Espinosa and De León-González, 2015, was described. These three states are part of the main ports and touristic regions in Mexico.…”

Section: Introductionmentioning

confidence: 92%

Pycnogonida de aguas mexicanas: listado con observaciones en diversidad y ecología

Ramírez-Tello¹,

Tello‐Musi²,

López-García³

2022

Bol. Investig. Mar. Costeras

View full text Add to dashboard Cite

This work is an updated checklist of Mexican Pycnogonida species for both oceans, the Mexican Pacific (PA) and the Gulf of Mexico (GMx). This research was carried out based on the first historical records by Schimkewitsch in 1893 up to the present day. The number of recorded species increased in this study. The total number of species in Mexican oceans is 58, distributed among 19 genera and 10 families. All records were cross-referenced with the original literature, and those found to be questionable were deleted from the checklist. With the data reported in this checklist, an extrapolation of the total number of species was performed using rarefaction curves, thus demonstrating that the recorded species fell well below the projected diversity. The curves showed an estimate of 80 species in the Pacific, whilst 100 species were projected for the Gulf of Mexico. These data indicate that collection efforts and species occurrences nationwide and by waterbody (PA and GMx) are insufficient to describe the diversity of Mexican pycnogonids.

show abstract

First record of a sea spider (Pycnogonida) from an anchialine habitat

Cited by 6 publications

References 16 publications

Meiofaunal Dynamics and Heterogeneity along Salinity and Trophic Gradients in a Mediterranean Transitional System

Meiofaunal Dynamics and Heterogeneity along Salinity and Trophic Gradients in a Mediterranean Transitional System

How is the anchialine fauna distributed within a cave? A study of the Ox Bel Ha System, Yucatan Peninsula, Mexico

Pycnogonida de aguas mexicanas: listado con observaciones en diversidad y ecología

Contact Info

Product

Resources

About