Tag: ecological research

Is It a Snake or a Lizard? Understanding the Formosan Legless Lizard

These lizards are among the most secretive and least studied groups in Taiwan.

A research team from the National Taiwan Normal University has clarified the status of a secretive reptile through a new study published in the open-access journal ZooKeys. Led by Si-Min Lin, the team focused on the Formosan legless lizard, scientifically known as Dopasia formosensis. These lizards are among the most secretive and least studied groups in Taiwan, living primarily under leaf litter and humus in moist forests. This elusive behavior makes field observations and ecological studies extremely difficult.

The study resolves a century of taxonomic debate over whether Taiwan’s legless lizards comprise one species or two. For decades, these populations were classified as Dopasia harti, a status complicated by the loss of the original Dopasia formosensis type specimen after World War II. To stabilise the identity of the species and re-establish it as the distinct lineage Dopasia formosensis, the research team has designated a “neotype” – this is a new physical specimen that serves as the official reference for the species name.

Dopasia formosensis in natural habitat: A fully mature adult male showing its dorsal bluish marking; A relatively younger male; A young individual with pale brown dorsal coloration and sharply contrasting black ventral surface. (Photo credit: Yu-Jhen Liang).

Physical Characteristics

The Formosan legless lizard is a medium-sized reptile that lacks external limbs. Adult males typically have a body length between 175 and 230 millimeters, while females are similar in size. A key feature of this species is its exceptionally long tail, which can be nearly double the length of its body.

People often mistake these lizards for snakes, but they possess several distinct features that set them apart. Unlike snakes, legless lizards have external ear openings, although they are quite small. They also have moveable eyelids, which means they can blink, a trait no snake possesses. Further, these lizards have a prominent lateral fold, which is a longitudinal groove running along each side of the body. This fold allows the skin to expand, which is useful for breathing and when females are carrying eggs.

Head morphology of the neotype of Dopasia formosensis; an adult male from Mingchi, Yilan County, Taiwan. (Photo credit: Chih-Wei Chen and Chin-Chia Shen).

Etymology and Colouration

The species name formosensis is rooted in the historical name for Taiwan, “Formosa”, derived from the Portuguese phrase Ilha Formosa (“Beautiful Island”). The name combines this geographical reference with the Latin suffix “-ensis”, which indicates the place of origin.

Top: Landscape near the type locality of Dopasia formosensis in Hinokiyama, currently known as a part of the Fuba Cross-ridge Trail.

Bottom: Landscape of the collection site of the neotype near Mingchi, Yilan, Taiwan. (Photo credits: Chung-Wei You and Kai-Xiang Chang).

The study also clarified a major point of ambiguity regarding the species’ color. Previously, lizards with bright blue spots were thought to be a different species than those without them. The research team confirmed that these markings are actually a form of sexual dichromatism – while females and young lizards usually have a plain pale brown or bronze color, fully mature adult males often display these conspicuous blue markings as a form of secondary sexual signalling.

Behavioural Characteristics

Since these legless lizards are so rarely seen, the research team relied on citizen science data from the Taiwan Roadkill Observation Network to gather information. In the wild, these lizards prefer high-humidity environments in mid-elevation forests with dense canopy cover. 

Sampling sites of Dopasia formosensis (Kishida, 1930), D. harti (Boulenger, 1899), and D. hainanensis (Yang, 1983) available from GenBank.

The researchers also noted parental care as a key behavioural characteristic for the species, suggesting that they may exhibit more complex social behaviors than many other reptiles. In related species within the Dopasia genus, for instance, females are known to exhibit egg-guarding behavior, where they remain with their clutch to protect it from predators and environmental hazards until the offspring hatch.

Egg guarding by a female Dopasia formosensis in the wild, observed in Pingtung County, southern Taiwan. (Photo credit: Weizun Wang).

A prior study documenting the species now recognised as Dopasia formosensis (previously identified as D. harti) notably also detailed its interesting fighting behavior. The encounter begins with a ritualised display where the lizards circle each other with mouths agape, flattened throats, and elevated forebodies. This posturing eventually escalates into physical combat, characterised by one-sided biting and rotational rolling as the males attempt to subdue one another.

Conclusion

The Formosan legless lizard is currently listed as a protected species under Taiwanese law. The research team emphasises that a stable scientific name and clear understanding of the species is critical for future conservation.

“Through these efforts, we aim to provide a more stable framework for future taxonomic, ecological and conservation studies of this overlooked lizard group.”

The Research Team

By making their data openly available, they hope to encourage further study of these unique animals across East Asia.

Original source:

Lin S-M, Shen C-C, Lin T-E, Liang Y-J, Chang W-H (2026) Redescription and neotype designation of Dopasia formosensis (Kishida, 1930) (Squamata, Anguidae) from Taiwan. ZooKeys 1270: 69-98. https://doi.org/10.3897/zookeys.1270.173752

For more articles on zoology, visit the ZooKeys website and follow the journal on BlueSky and Facebook.

Recently launched Individual-based Ecology journal publishes its first articles

IBE offers a transformative framework for addressing global challenges such as the loss of biodiversity and potential loss of ecosystem services.

Individual-based Ecology (IBE), a new open-access peer-reviewed journal by scholarly publisher and technology provider Pensoft, has now published its first articles, offering a fresh perspective on how the behaviour of individual organisms and ecological systems dynamics are linked.

The journal was launched in September 2024 with an official announcement made during the German Ecological Society’s 53rd annual conference (Freising, Germany).

Pensoft launches new journal: Individual-based Ecology

To fill a known gap in knowledge, the journal focuses on individual-based perspectives in ecology, complementing other ecological disciplines. Current approaches cannot fully capture the mechanisms underlying ecological responses to change in drivers, the journal’s editors believe, as they rarely focus on the individual organisms who directly respond to change.

Four editors-in-chief lead IBE: Prof. Dr. Volker Grimm and Prof. Dr. Karin Frank of Helmholtz Centre for Environmental Research – UFZ, Prof. Dr. Mark E. Hauber of The City University /(CUNY) of New York, and Prof. Dr. Florian Jeltsch of the University of Potsdam. “This team represents an international and collaborative group who agree on the conceptual and empirical need for this new journal”- says Dr Mark E. Hauber, from the Graduate Center of CUNY, and a former guest professor in ecology at the University of Potsdam.

The journal is published under a diamond open-access model, which makes it free of charge for both readers and authors. It publishes a wide range of articles, including empirical, experimental, and modeling studies, as well as reviews, perspectives, and methodological papers.

By blending basic and applied research, IBE offers a transformative framework for addressing global challenges such as the loss of biodiversity and potential loss of ecosystem services.

“We propose a paradigm shift in ecological science, moving from simplifying frameworks that use species, population or community averages to an integrative approach that recognizes individual organisms as fundamental agents of ecological change,” advocates write in a forum paper just published in IBE’s first issue. 

Illustration showing mouse behavior variation, predation effects, and colonization success based on boldness and size in new habitats.
Examples of individual variation and its consequences: a individual variation describes the variation in traits, including behaviour, between or within individuals resulting from various processes such as microevolution and biotic filtering. It also explicitly includes variation induced by experience, health status or microbes and microbial communities associated with the host; b simplified example showing how successful colonisation or invasion depends on inter-individual variation in morphological or behavioural traits (González-Suárez et al. 2015; Dammhahn et al. 2020; Premier et al. 2020).

“By unravelling and predicting the dynamics of biodiversity in the Anthropocene through a comprehensive study of individual organisms, their variability and their interactions, individual-based global change ecology will provide a critical foundation for a better understanding if and how we can manage individual variation and behaviour for conservation and sustainability, taking into account individual-to-ecosystem pathways and feedbacks.” 

Illustration showing the impact of individual variation on biodiversity across genes, populations, communities, and ecosystems under global change.
Hierarchical organisation from genes to ecosystems. Individuals are the elementary particles of ecological systems, meaning that variation and interactions between individuals can scale up to emergent properties at the population, community and ecosystem levels. The different ecological levels are highly interconnected through both bottom-up and top-down processes. Elucidating these feedback loops through an individual-based lens is a prerequisite for understanding ecosystem resilience and response to global change.

“By taking into account the variation, behaviours, and interactions of individual organisms, individual-based ecology links the responses of organisms to the responses of ecosystems: if we understand enough about individuals, we can predict complex system dynamics, even under novel conditions,” the editors and colleagues write in a “manifesto” for individual-based ecology that they published in the new journal. “We intend the journal to show how the individual-based perspective, in empirical, theoretical, and computational studies, benefits all branches of ecology.”

IBE’s first published research articles provide excellent examples of the individual-based perspective of the journal. Church et al. explore, using an established model of brown trout, how the uptake of microplastics by fish with different personalities affects population size. Ayllón et al. use the same model to explore to what extent behavioural plasticity allows this species to cope with environmental change, in particular increasing temperatures. Railsback and Harvey argue that in many models the representation of mortality risk is too simple. They present a new method, “survival increase functions”, which is more realistic but still straightforward to calibrate. 

Guest blog post: Global change, individual behaviour, and trout population persistence

The journal is supported by the Helmholtz Centre for Environmental Research (UFZ, Germany) and the City University of New York (CUNY, USA).

The journal utilises Pensoft’s innovative ARPHA platform, which offers a seamless end-to-end publishing experience, encompassing all stages between manuscript submission and article publication, indexation, dissemination and permanent archiving. As a journal of Pensoft, IBE joins a number of open-access scholarly outlets in ecology  by the publisher.

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You can keep up with updates from the journal on Bluesky, X and Facebook.

One Ecosystem selected for inclusion in the Web of Science

“Not only does it mean that content is persistent in merit and quality, but that innovative research outputs are already appreciated within academia,” says Editor-in-Chief Prof Dr Benjamin Burkhard

Seven years after its official launch in May 2016, the One Ecosystem journal has successfully completed the rigorous quality and integrity assessment at Web of Science.

Scientific papers published in One Ecosystem from 2021 onwards will be indexed at the Emerging Sources Citation Index (ESCI) and the Journal Citation Reports (JCR), revealed the Indexing team at ARPHA Platform.

The news means that One Ecosystem might see its very first Journal Impact Factor (JIF) as early as 2024, following the latest revision of the metric’s policies Clarivate announced last July. According to the update, all journals from the Web of Science Core Collection are now featured in the Journal Citation Reports, and thereby eligible for a JIF.

“Giving all quality journals a Journal Impact Factor will provide full transparency to articles and citations that have contributed to impact, and therefore will help them demonstrate their value to the research community. This decision is aligned to our position that publications in all quality journals, not just highly cited journals, should be eligible for inclusion in research assessment exercises,” said back then Dr Nandita Quaderi, Editor-in-Chief and Editorial Vice President at Web of Science.

“We are happy to learn that Web of Science has recognised the value and integrity of One Ecosystem in the scholarly landscape. Not only does it mean that the scientific content One Ecosystem has been publishing over the years is persistent in merit and quality, but that innovative research outputs are already widely accepted and appreciated within academia.

After all, one of the reasons why we launched One Ecosystem and why it has grown to be particularly distinguished in the field of ecology and sustainability is that it provides a scholarly publication venue for traditional research papers, as well as ‘unconventional’ scientific contributions,”

comments Prof Dr Benjamin Burkhard, Executive Director at the Institute of Physical Geography & Landscape Ecology, Leibniz University Hannover (Germany) and founding Editor-in-Chief of One Ecosystem.

“These ‘unconventional’ research outputs – like software descriptions, ecosystem inventories, ecosystem service mappings and monitoring schema – do not normally see the light of day, let alone the formal publication and efficient visibility. We believe that these outputs can be very useful to researchers, as well as practitioners and public bodies in charge of, for example, setting up indicator frameworks for environmental reporting,”

says Prof Davide Geneletti, Department of Civil, Environmental and Mechanical Engineering of University of Trento, Italy, and Deputy Editor-in-Chief of One Ecosystem.

“In fact, last year, we also launched a new article type: the Ecosystem Accounting table, which follows the standards set by the the System of Environmental-Economic Accounting Ecosystem Accounting (SEEA EA). This publication type provides scientists and statisticians with a platform to publish newly compiled accounting tables,” 

adds Dr Joachim Maes, Policy analyst at the Directorate-General for Regional and Urban Policy of the European Commission and Deputy Editor-in-Chief of One Ecosystem.

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Previously, One Ecosystem has been accepted for indexing at over 60 major academic databases, including Scopus, DOAJ, Cabell’s Directory, CABI and ERIH PLUS. In June 2022, the journal received a Scopus CiteScore reading 7.0, which placed it in Q1 in five categories: Earth and Planetary Sciences; Ecology; Nature and Landscape Conservation; Agricultural and Biological Sciences (miscellaneous); Ecology, Evolution, Behavior and Systematics.

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You can follow One Ecosystem on Twitter and Facebook.