Papers by Claudio Ghiglione
Figure 8 from: Ghiglione C, Alvaro MC, Cecchetto M, Canese S, Downey R, Guzzi A, Mazzoli C, Paola Piazza P, Rapp HT, Sarà A, Schiaparelli S (2018) Porifera collection of the Italian National Antarctic Museum (MNA), with an updated checklist from Terra Nova Bay (Ross Sea). ZooKeys 758: 137-156. ht...
The Ross Sea can be considered, in a biological sense, one of the better-known areas in Antarctic... more The Ross Sea can be considered, in a biological sense, one of the better-known areas in Antarctica due to the high number of expeditions engaged since 1899. Hundreds of mollusc species have been collected and classified along years in a unique database which is now available for study. The possibility to access such impressive information offers the opportunity to apply important results in the study of biodiversity for that area. Recent influential scientific contributions induce us to study species diversity by means of accumulation curves based on Hill numbers, i.e. the effective number of equally frequent species.
The distributional records of Ophiuroidea stored at the Italian National Antarctic Museum (MNA, S... more The distributional records of Ophiuroidea stored at the Italian National Antarctic Museum (MNA, Section of Genoa) are presented, corresponding to 1595 individuals that belong to 35 species and 17 genera. Specimens were collected in 106 different sampling stations at depths ranging from 21 to 1652 m in the
The distributional records of Ophiuroidea stored at the Italian National Antarctic Museum (MNA, S... more The distributional records of Ophiuroidea stored at the Italian National Antarctic Museum (MNA, Section of Genoa) are presented, corresponding to 1595 individuals that belong to 35 species and 17 genera. Specimens were collected in 106 different sampling stations at depths ranging from 21 to 1652 m in the
ZooKeys, 2018
This new dataset presents occurrence data for Porifera collected in the Ross Sea, mainly in the T... more This new dataset presents occurrence data for Porifera collected in the Ross Sea, mainly in the Terra Nova Bay area, and curated at the Italian National Antarctic Museum (MNA, section of Genoa). Specimens were collected in 331 different sampling stations at depths ranging from 17 to 1,100 meters in the framework of 17 different Italian Antarctic expeditions funded by the Italian National Antarctic Research Program (PNRA). A total of 807 specimens, belonging to 144 morphospecies (i.e., 95 taxa identified at species level and 49 classified at least at the genus level) is included in the dataset. Nearly half (45%) of the species reported here correspond to species already known for Terra Nova Bay. Out of the remaining 55% previously unknown records, under a third (~29%) were classified at the species level, while over a quarter (~26%) were ascribed to the genus level only and these would require further study. All vouchers are permanently curated at the MNA and are available for study ...
Environmetrics
Bayesian semi-parametric GLMM for historical and newly collected presence-only data: an applica o... more Bayesian semi-parametric GLMM for historical and newly collected presence-only data: an applica on to species richness of Ross Sea Mollusca Working Paper n. 15 Giugno 2017 I Working Paper di Scienze Economiche e Poli che hanno lo scopo di favorire la tempes va divulgazione, in forma provvisoria o defini va, di ricerche scien fiche originali. La pubblicazione di lavori nella collana è sogge a a referaggio e all'accoglimento del Comitato editoriale. I Working Paper sono disponibili all'indirizzo: www.univda.it.
ABSTRACT Antarctica is the harshest place in the world to study marine assemblages. Until recentl... more ABSTRACT Antarctica is the harshest place in the world to study marine assemblages. Until recently, most of our species distribution knowledge was based on ‘old’ datasets obtained by historical sampling. Their species records were extrapolated and used to address studies of diversity and distribution of taxa. Few of these studies have a balanced design or a number of replicates adequate to unravel basic issues of spatial variability across scales. Moreover, a variety of sampling gears have been deployed, preventing direct comparisons. In this contribution we have re-analyzed the Ross Sea molluscan fauna, from the earliest scientific explorations to today, and compared former data with those obtained in the framework of recent voyages with RV Tangaroa and RV Italica expeditions in 2006/2008. For the first time these voyages deployed fine, 0.5 mm-meshed towed gear on the shelf and slopes of the Ross Sea. An unexpected, high proportion of new species records has been found, suggesting that most of the molluscan diversity of the Ross Sea has been overlooked in the past. Considering the amount of new records added to the ‘old’ data set it seems that the ‘real’ sampling and assemblage assessment has just begun with the use of fine-meshed gear
Polar Biology, Apr 5, 2017
In 2008, a large sampling campaign took place in the Ross Sea between ~66°S and ~77°S during the ... more In 2008, a large sampling campaign took place in the Ross Sea between ~66°S and ~77°S during the NIWA IPY-CAML voyage of R/V Tangaroa, as part of the Census of Antarctic Marine Life (CAML). Samples of benthos were obtained by using a variety of sampling methods from 64 stations at depths of between 283 m to 3490 m. Mollusca accounted for 173 living species and 1034 specimens, which were analysed in terms of variation in richness and composition with latitude and depth, and to assess which macrofaunal size fraction contained the highest biodiversity. Differences were detected in species composition with latitude (averaged across depth groups) but not for depth (averaged across latitudinal groups). Richness varied locally and showed a variety of patterns according to the areas and depths considered. New species accounted for ~7% of the total number of species and new regional records for ~12%. Rarity was high, with a ~41% of species represented by single individuals and ~63% occurring at one station only. The greatest diversity was found in the fine fraction (i.e. <4.1 mm) suggesting that the systematic use of finemesh trawling in future sampling activities can be of help in accelerating the census of Antarctic mollusc fauna.
Uploads
Papers by Claudio Ghiglione