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Markus Roesch

@markusroesch.bsky.social
125 followers 84 following 11 posts

Herpetologist. Interests in reptilian biodiversity, ecology and conservation on tropical islands.

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Markus Roesch @markusroesch.bsky.social · 25/04/2026
New paper! 🧪 We found substantial morphological variation in Seychelles bronze geckos among islands, likely outweighing regional biogeographic patterns observed in other herpetofauna. Great collaboration with @lib-morpholab.bsky.social @nhm-london.bsky.social #islands #geckos 🦎🏝️🇸🇨
doi.org
Inter- and intraspecific morphometric divergences in a Seychelles endemic gecko genus - BMC Ecology and Evolution
BMC Ecology and Evolution - Accurate species delimitation is essential for understanding biodiversity patterns and guiding conservation, yet cryptic species with minimal morphological variation...
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Jennifer Appoo @jenniferappoo.bsky.social · 13/04/2026
"International Mollusc of the Year" 🐌 celebrates five remarkable molluscs each year. Your vote decides the top mollusc, and Senckenberg will sequence the complete genome of the winner 🧬 Vote for the Seychelles White Slug, Filicaulis seychellensis 🌟 www.unitasmalacologica.org/filicaulis-s...
unitasmalacologica.org
Filicaulis seychellensis
This slug has looked extinction in the eye and recovered. In 2017 it seemed to vanish after invasive yellow crazy ants ( Anoplolepis gracilipes ) overran its habitat. Intensive conservation efforts...
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Jennifer Appoo @jenniferappoo.bsky.social · 12/04/2026
New paper in @ecologicalresearch.bsky.social 🧪 “Intercolony and intra-annual variation in the isotopic niche of red-footed boobies in the tropical Indian Ocean” 🐦🏝️ doi.org/10.1111/1440... #seabirds #ornithology #islands 📷©Nathan Hudson-Peacock @iomarinescience.bsky.social
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Dr Mark D. Scherz @markscherz.bsky.social · 01/12/2025
🚨PhD position available!🚨🧪 I am seeking a talented PhD student to join my ERC StG project GEMINI, to explore the exciting world of vertebrate genomics and comparative genomics, seeking to understand the genomics of miniaturisation! 🦇🦎🦜🐸🐟🦈 🤏🧬 Deadline: 4 Jan 2026! employment.ku.dk/phd?show=153...
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Markus Roesch @markusroesch.bsky.social · 01/12/2025
We established the first local headstarting programme for Phelsuma day geckos, providing a critical conservation tool to secure the long-term persistence of a Critically Endangered species and a model for managing other threatened Phelsuma across the region. 🦎🌿🧪
researchgate.net
(PDF) A headstarting programme for the Critically Endangered Manapany day gecko Phelsuma inexpectata on Réunion Island
PDF | The Manapany day gecko Phelsuma inexpectata has experienced drastic population declines over the past decade in its native range on Réunion... | Find, read and cite all the research you need on ...
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Ruth Dunn @ruthedunn.bsky.social · 27/10/2025
New in @natrevbiodiv.nature.com: our review of the influence of #seabirds, via their nutrient transfer, on islands & adjacent marine ecosystems 🐦🏝️🪸 We highlight knowledge gaps & future directions ✨ "The circular seabird economy is critical for oceans, islands and people": doi.org/10.1038/s443...
Schematic diagram of the influence of seabirds on temperate and tropical near-shore marine systems.
Temperatre systems:
- Nutrient enrichment and predation on herbivorous invertebrates can lead to increased algal production
- Phytoplankton communities change, featuring more large-celled species
- Intertidal organisms incorporate seabird-enriched material by grazing on detritus and biofilm in tidepools
- Macroalgae biodiversity and primary production are boosted
Tropical systems:
- Mangrove leaf nutritional quality increases
- Corals recover faster after bleaching events
- Fish biomass increases across different trophic groups
- Pelagic and benthic consumers' foraging behaviour shifts
- Parrotfish grazing and bioerosion rates increase
- Fish grow larger
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Markus Roesch @markusroesch.bsky.social · 23/10/2025
A unique insect 🦗 – vertebrate 🦎 interaction: Seychelles endemic geckos feeding on planthopper honeydew. Read more about it here: dx.doi.org/10.48716/bul... 🦎🌿🧪
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LIB-MorphoLab @lib-morpholab.bsky.social · 07/07/2025
Markus @markusroesch.bsky.social, a visiting PhD student from CIBIO-BIOPOLIS, University of Porto, is using #microCT scans and geometric morphometrics to study cryptic diversity within #Seychelles endemic bronze #geckos. 🦎
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Indian Seabird Group @indianseabirdgroup.bsky.social · 01/05/2025
We are starting May with a fascinating talk from @jenniferappoo.bsky.social on the impacts of seabird-derived nutrients on mangrove ecosystems! Follow this link and set a reminder now! www.youtube.com/live/muPejoo... 🌏🪶 #WomenInSTEM #Seabirds #AcademicSky
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Markus Roesch @markusroesch.bsky.social · 17/02/2025
Invasive species alert! Our molecular analysis confirms Agama picticauda is spreading in the Western Indian Ocean. 🦎🌿🧪 doi.org/10.1007/s105...
doi.org
Molecular analysis confirms Agama picticauda invasion on Western Indian Ocean islands - Biological Invasions
The Western Indian Ocean biodiversity hotspot hosts a remarkable array of endemic species, but invasive alien species increasingly threaten its unique ecosystems. Lizards of the West African Agama aga...
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Markus Roesch @markusroesch.bsky.social · 20/01/2025
It was a great pleasure to present Seychelles reptile diversity and my research on the endemic bronze geckos today at the "Seychelles Endemic #Amphibian & #Reptile Symposium". 🦎🐍 @jimlabisko.bsky.social @simonmaddock.bsky.social
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Simon Maddock @simonmaddock.bsky.social · 16/01/2025
There is a symposium happening on Monday 20th Jan, titled "SEYCHELLES ENDEMIC #AMPHIBIANS AND #REPTILES: CURRENT KNOWLEDGE AND NEXT STEPS FOR #CONSERVATION". We will be streaming the talks if you can't be here: Link tinyurl.com/Seychelleshe... or use QR code. Nb. Schedule is Seychelles time. 🧪🐍🐸🔬
09:30 – 10:00	Welcome refreshments
10:00 – 10:15	Introduction from IBC/UniSey - Gérard Rocamora, Jérôme Harlay
10:15 – 11:10	Current research status of amphibians and reptiles from UK IBC affiliates - Jim Labisko,
                        Simon Maddock, Ellen Sharkey, David Gower
11:10 – 11:30	Refreshment break
11:30 – 11:45	EDGE Sooglossids (title TBC) - James Mougal (independant)
11:45 – 12:00	A scientific approach from the field observations to the conservation actions: explicit, 
                        transparent, replicable, verifiable and falsifiable - Bruno Senterre (independent consultant)
12:00 – 12:15	Fundraising, facilitating partnerships, collaborations, and investment for Seychelles
                        EDGE amphibians - Rachel Bristol (independant)
12:15 – 12:30	Reptile diversity and bronze gecko research in Seychelles - Markus Roesch (Uni of Porto)
12:30 – 13:30	Lunch break
13:30 – 13:45	The Biodiversity Conservation Section - MACCE: Biodiversity Conservation (Kevin Moumou)
13:45 – 14:00	An overview of conservation work on herpetofauna in Vallee de Mai - Seychelles Islands 
                        Foundation (Jessica Constance)
13:30 – 14:45	Aldabra giant tortoise conservation, management, and ecological research in Seychelles 
                        - Indian Ocean Tortoise Alliance (Rich Baxter)
13:30 – 14:45	The population status of freshwater terrapins in the Story Resort wetland - Marine 
                        Conservation Society Seychelles (Chris Mason-Parker)
13:30 – 14:45	The work of Gaea Seychelles (title TBC) - Gaea Seychelles (Mersiah Rose)
14:45 – 15:05	Refreshment break
15:05 – 15:20	An introduction to the IUCN Red List - Louise Hobin (IUCN)
15:20 – 15:35	An introduction to the IUCN Green Status of Species - Magdalena Cygan (IUCN)
15:35 – 16:00	Closing remarksQR code for symposium
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Markus Roesch @markusroesch.bsky.social · 12/01/2025
The Yellow crazy ant Anoplolepis gracilipes, introduced on Reunion Island since the late 17th century, has recently emerged as a new and possibly significant threat to the Critically Endangered Manapany day gecko Phelsuma inexpectata. 🦎🌿🧪 dx.doi.org/10.48716/bul... #NatureOceanIndien #addHerper
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Markus Roesch @markusroesch.bsky.social · 05/01/2025
Gecko🦎 - plant🌿interaction between island endemics in Seychelles 🇸🇨. Read about it in Herpetology Notes: www.biotaxa.org/hn/article/v...
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