Group leader at @IBE_Barcelona & Adjunct at @MiamiRosenstiel. Microbial Ecology & Evolution @delCampoLab & PR2 Database 🔬🌍🦠🧬🪸 Copresident a @catbiogenoma
Sant Just Desvern, Catalonia
Joined March 2007
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Coral bleaching looks like a reef-scale catastrophe. But it starts as a breakdown between single cells.
Led by @AMBonacolta, we watched it at that scale for the first time: the first single-cell transcriptomics of a bleaching coral 🪸 #CoralReefs
doi.org/10.1186/s40168-026-0…
ALT Four-panel figure of the coral holobiont through heat stress. Panel A: photosynthetic efficiency over time, stable in blue control corals, declining in red heat-treated corals. Panel B: photos of coral cores paling from healthy to bleached, each paired with a UMAP plot of holobiont cell types in Orbicella faveolata. Panel C: bar chart of cell-type abundance shifts during bleaching. Panel D: heatmap of gene expression changes across cell types at each stage.
Javier del Campo retweeted
Work by @RocioMozoM, @dreailla (also an undergrad in the lab at the time), and @fonamental at @IBE_Barcelona. Isolates are cryobanked, and 16S sequences are on NCBI, so come and use them 🙌. Paper 📄 doi.org/10.1007/s00248-026-0…
Javier del Campo retweeted
Notes from the bench 🔬 Half-strength marine agar beat everything. TCBS gave nothing, even with Vibrio around. Coral extract recovered strains that no other medium did. And three weeks of patience brought out the slow growers.
Javier del Campo retweeted
Strong host specificity: 70% of genera came from a single coral species, and only Ruegeria turned up in all four. Many isolates show traits linked to biofilms, surface colonization, and polysaccharide degradation, the toolkit for settling on a coral 🪸
Javier del Campo retweeted
The haul: 84 pure isolates, 37 OTUs, 20 genera across four bacterial classes 🧬. Six isolates sit below 97% 16S identity to any described species (Vibrio, Pseudoalteromonas, Alteromonas, Shewanella, Tritonibacter), so they are likely new taxa.
Javier del Campo retweeted
We sampled four species by scuba diving along the NE Iberian coast 🤿: three gorgonians (Eunicella singularis, Paramuricea clavata, Leptogorgia sarmentosa) and the stony coral Cladocora caespitosa, from the Medes Islands to the Columbretes.
Javier del Campo retweeted
Why culture? Metabarcoding has mapped who lives on corals, but sequences alone say little about what symbionts actually do. Isolates let us test physiology, interactions and function in vitro. So we went back to the plates 🧫 #MicrobialEcology
Javier del Campo retweeted
New paper from the lab, led by @RocioMozoM during her @CSIC JAE Intro undergraduate internship (her first paper 🙌). We cultured bacteria from four Mediterranean corals and built a cryobank of 84 isolates. It's now out in Microbial Ecology (open access). 🪸🦠 #Coral #Microbiome
Javier del Campo retweeted
El corall vermell de les Medes, icona del Mediterrani, es mor: "Són com arbres calcinats" 3cat.cat/3catinfo/el-corall-…
3cat.cat/3catinfo/el-corall-…
Javier del Campo retweeted
📄 Take-home: do not throw away your chloroplast reads. Plastid-derived 16S sequences carry real ecological signal, and microeukaryote-inclusive surveys are needed to understand the coral holobiont. #corals #microbiome
Preprint on @biorxivpreprint: biorxiv.org/content/10.64898…
Javier del Campo retweeted
🌱 Ostreobium: six distinct clades recovered, three described here for the first time. The North West Pacific emerges as a potential hotspot of Ostreobium diversity.
Javier del Campo retweeted
🧬 New #protist diversity hiding in the discard pile. Phylogenetic placement of apicomplexan reads classified most as Corallicolida and revealed ASVs consistent with a novel apicomplexan-related lineage, tentatively named ARL-XXI.
Javier del Campo retweeted
🧩 Host specificity is strong. The most abundant ASVs are mostly restricted to particular coral lineages, a pattern consistent with phylosymbiosis and supported by ASV-level community profiles across the whole dataset.
Javier del Campo retweeted
🔬 Two groups dominate everywhere, across lineages, health states, and oceans: Corallicolida (coral apicomplexans) and Ostreobium (skeleton-boring green algae). After Symbiodiniaceae, these are the most widespread plastid-bearing coral symbionts. #symbiosis
Javier del Campo retweeted
🌍 Scale: 2,679 samples from 45 studies, reprocessed into 10,950 ASVs from 13 million read pairs. 73 coral species, 23 families, all major ocean regions, and three host health states.
Javier del Campo retweeted
🗑️ The idea: in coral 16S rRNA #microbiome datasets, reads assigned to “chloroplast” are usually discarded as noise. But those reads come from real organisms, the plastid-bearing eukaryotes in the holobiont. Joana went back and kept them.
Javier del Campo retweeted
🪸 New preprint from the lab, and a first lead-author paper for @Joanakrause99: a global meta-analysis of plastid-bearing microeukaryotes living in #corals, built from sequences most 16S studies throw away. With @BradWeilerDives and @fonamental, at @IBE_Barcelona.
Javier del Campo retweeted
AND NEW GLORY Featherweight Champion of the World Miguel Trindade #GLORY110
El matrimoni antivacunes que va treure #Vèrtex3Cat ahir al vespre ja els van portar a @maticatradio al març.
Es tracta d'una opinió tan poc estesa, que han hagut de repetir dos cops als mitjans públics...
🔊 3cat.cat/3cat/matrimoni-anti…
Responsables de @som3cat, esteu posant al mateix nivell una posició marginal gens documentada i unes polítiques públiques de salut recolçades en milers de dades científiques; fent d'altaveus de la desiformació i donant legitimitat a la maguferia.