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opencc-zeroAug 2020View details →

Data from: Islands in the desert for cavity-nesting bees and wasps: ecology, patterns of diversity, and conservation at oases of Baja California peninsula

Aims: The oases of Baja California peninsula (BCP) have been proposed as important hotspots of biodiversity that hold an exceptional richness in the middle of desert conditions. We provide the effect of habitat, climatic, biogeographic and anthropogenic disturbance on communities of cavity nesting taxa, emphasizing on bees, wasps and their natural enemies. Location: Baja California Peninsula, Northwest Mexico. Methods: In oases of BCP and desert neighbor environments, trap-nesting taxa were evaluated in response to factors affecting the nest abundance, richness, and community structure. We used statistical models to find the variables controlling the nest abundance and ecological analyses to determine the habitat effect on diversity under different scenarios of disturbance and latitude. Results: The nest abundance varied between bees and wasps, but solar irradiation and relative humidity influenced the abundance of both groups. In general, abundance and richness were higher in oases. Bees did not discriminate between oasis and desert habitats to nest and mud-daubing wasps were highly dependent of oases. However, there were exceptions in both groups. The degree of anthropogenic disturbance affected the species composition, richness, and natural enemies. Main conclusions: The oases of Baja California seem to be functioning as mesic islands into the desert, each oasis hosting a great and unique richness of cavity-nesting taxa. About 65% of nest abundance and 50% of species occurred exclusively in the oasis. Thus, at least 21 species could be threatened if the oases of BCP disappear in the future. Local conditions are shaping the community structure of species, but also large-scale factors, e.g. climate and biogeographic patterns seem to be influencing the community structure. Since habitat loss and fragmentation can be a major problem in most oases, strategies to maintain the ecosystem services of pollinators and predators should be included in the conservation programs of these fragile habitats.

opencc-zeroDec 2013View details →

Data from: Marine communities on oil platforms in Gabon, West Africa: high biodiversity oases in a low biodiversity environment

The marine biodiversity of Gabon, West Africa has not been well studied and is largely unknown. Our examination of marine communities associated with oil platforms in Gabon is the first scientific investigation of these structures and highlights the unique ecosystems associated with them. A number of species previously unknown to Gabonese waters were recorded during our surveys on these platforms. Clear distinctions in benthic communities were observed between older, larger platforms in the north and newer platforms to the south or closer to shore. The former were dominated by a solitary cup coral, Tubastraea sp., whereas the latter were dominated by the barnacle Megabalanus tintinnabulum, but with more diverse benthic assemblages compared to the northerly platforms. Previous work documented the presence of limited zooxanthellated scleractinian corals on natural rocky substrate in Gabon but none were recorded on platforms. Total estimated fish biomass on these platforms exceeded one ton at some locations and was dominated by barracuda (Sphyraena spp.), jacks (Carangids), and rainbow runner (Elagatis bipinnulata). Thirty-four percent of fish species observed on these platforms are new records for Gabon and 6% are new to tropical West Africa. Fish assemblages closely associated with platforms had distinct amphi-Atlantic affinities and platforms likely extend the distribution of these species into coastal West Africa. At least one potential invasive species, the snowflake coral (Carijoa riisei), was observed on the platforms. Oil platforms may act as stepping stones, increasing regional biodiversity and production but they may also be vectors for invasive species. Gabon is a world leader in terrestrial conservation with a network of protected areas covering >10% of the country. Oil exploration and biodiversity conservation currently co-exist in terrestrial and freshwater ecosystems in Gabon. Efforts to increase marine protection in Gabon may benefit by including oil platforms in the marine protected area design process.

opencc-zeroNov 2019View details →

Disentangling the coexistence strategies of mud-daubing wasp species through trophic analysis in oases of Baja California peninsula

Species within the same trophic level show different strategies to avoid competition. Among these mechanisms, differences in body size, spatio-temporal segregation, and diet preference often leads to a niche partitioning. Nonetheless, little attention on coexisting predatory insects and their network interactions has been paid. In this study, we analyzed the strategies to avoid competition among three sympatric mud-daubing wasps of the genus Trypoxylon (Hymenoptera: Crabronidae) in oases and their surrounding xeric area from the Baja California peninsula, Mexico. We compared the prey richness, composition and proportion of spider guilds that were captured by the wasps. We tested whether the differences in wasp body size explained the niche breadth, niche overlap and the size of spider prey. We assessed the spider-wasp interactions through a network analysis. With the use of trap-nests, we collected 52 spider species captured by the wasps. Both the guild and species composition of preyed spiders was different between the three wasp species. Differential proportions in the capture of spider guilds and a little diet overlap were found among the wasp species. We found that the wasp body size was positively correlated with prey size, but it was not a proxy of niche breadth. Moreover, the largest wasp species was able to nest in both mesic and xeric habitats, while the two smaller species were restricted to the oases. This study reveals that the diversity of spiders in oases of Baja California peninsula is crucial to maintain highly specialized oasis-dependent wasp species. The niche partitioning between mud-daubing wasps can be shaped by their inherent body size limitations and hunting strategies through foraging specialization for specific spider guilds. Food selection and slight differences in body size reduce competition and allow the coexistence of sympatric wasps. Our study is the first approach exploring the interaction networks between mud-daubing wasps and their spider preys, highlighting new insights into the morphological and ecological factors that shape antagonistic interactions, and allow the coexistence of predators in deserts.

opencc-by-4.0Apr 2024View details →

Training performance comparison includes Oases and selective recomputation

Training performance on LLaMA-7B model. "Megatron SS" represents the Megatron with selective recomputation. Compared to Megatron SS, Oases can accelerate training by 1.15–1.38×.

Fig. 4 in Rotifers (Rotifera) from the inland waters and terrestrial habitats of East Antarctic oases (Enderby Land and Prydz Bay)

Fig. 4. Rotifers of Monogononta subclass. A – Cephalodella forficata (Ehrenberg, 1832); B – Collotheca ornata (Ehrenberg, 1832); C – Epiphanes senta (Müller, 1773); D – Lepadella patella (Müller, 1773); E – Notholca verae Kutikova, 1958; F – Resticula gelida (Harring & Myers, 1924).

Fig. 1. Study sites. A in Rotifers (Rotifera) from the inland waters and terrestrial habitats of East Antarctic oases (Enderby Land and Prydz Bay)

Fig. 1. Study sites. A – The location of study areas on the map of Antarctica; B – The area of 'Vecherniaya Mount' field base (Thala Hills oasis); C – The area of 'Molodiozhnaya' field base (Thala Hills oasis); D – The area of 'Druzhniy–4' field base; E – The area of 'Progress' station (Larsemann Hills oasis); On 1B–E the areas without permanent ice cover are in gray.

Fig. 3 in Rotifers (Rotifera) from the inland waters and terrestrial habitats of East Antarctic oases (Enderby Land and Prydz Bay)

Fig. 3. Rotifers of Bdelloidea subclass. A – Adineta cf. grandis Murray, 1910: A1 – dorsal view, A2 – head, A3 – fragment of head of the pressed specimen, A4 – masticatory apparatus. B – Philodina gregaria Murray, 1910: B1 – lateral view, B2 – dorsal view of the pressed specimen, B3 – dorsal view of the pressed specimen with semi-spread corona, B4 – three embryos from one maternal specimen, B5 – masticatory apparatus. C – Adineta cf. vaga vaga (Davis, 1873). D – Adineta steineri Bartoš, 1951. E, F – Unidentified bdelloid rotifers in contracted shape (examples); mtu – major teeth in unci; rl – rostrum lamella; rt – rake teeth; fi – fingers; tr – trophi.

Fig. 2 in Rotifers (Rotifera) from the inland waters and terrestrial habitats of East Antarctic oases (Enderby Land and Prydz Bay)

Fig. 2. Examples of studied habitats. A – Meltwater pond. B – Lichen fouling. C – Algae Prasiola crispa.

opennotspecifiedNov 2017View details →

Subspecies and Distribution. G.p.pyramidumEGeoffroySaint-Hilaire,1803—NEgypt. G. p. elbaensis Setzer, 1958 — SE Egypt and NE Sudan (SE Eastern Desert). G. p. gedeedus Osborn & Helmy, 1980 — known from a few oases in Egypt. Also present in W Mauritania, and from Mali E to Sudan, but subspecies involved not known. in Muridae

Subspecies and Distribution. G.p.pyramidumEGeoffroySaint-Hilaire,1803—NEgypt. G. p. elbaensis Setzer, 1958 — SE Egypt and NE Sudan (SE Eastern Desert). G. p. gedeedus Osborn & Helmy, 1980 — known from a few oases in Egypt. Also present in W Mauritania, and from Mali E to Sudan, but subspecies involved not known.

ClinicalTrials.gov32/100

OXiris for Abdominal SEptic Shock (OASES Study)

ClinicalTrials.gov study NCT06504316. IPD Sharing: Not stated. Countries: 1. Publications: 1.

restrictedIPD-UNDECIDEDFeb 2026View details →

publicNov 2019View details →

Disentangling the coexistence strategies of mud-daubing wasp species through trophic analysis in oases of Baja California peninsula

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publicJun 2015View details →

Data from: Marine communities on oil platforms in Gabon, West Africa: high biodiversity oases in a low biodiversity environment

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