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Lush Sanctuaries of Survival:

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How Sri Lanka’s Home Gardens Are Healing a Biodiversity Crisis

At a time when deforestation, monocultures, and climate chaos are rapidly eroding the natural wealth of Sri Lanka, a quiet revolution in conservation is flourishing right outside people’s front doors.

Sri Lanka’s traditional home gardens—are now being recognised not merely as spaces of subsistence but as dynamic arks of biodiversity. A groundbreaking 15-year study led by biodiversity scientists  Suranjan Karunaratne, Dushantha Kandambi, and Thilina Surasinghe has revealed that a single 36-perch garden in Rambukpitiya, in the central highlands of Kandy District, has evolved into a thriving microrefugium for more than 250 species—95 of them endemic and 74 threatened, including seven classified as Critically Endangered.

“Home gardens can no longer be dismissed as marginal green patches. Our findings show that, with thoughtful management, they can act as lifelines for species teetering on the edge,”

Karunaratne told The Island.

The transformation began in 2008. The land, initially dominated by banana (Musa acuminata) cultivation, was gradually rewilded. Banana trees were phased out, native tree species such as Artocarpus heterophyllus (jackfruit), Magnolia champaca (sapu), Swietenia macrophylla (mahogany), and Persea americana (avocado) were introduced, and leaf litter—once removed for aesthetic reasons—was allowed to accumulate naturally.

This shift created a complex multilayered habitat mimicking forest conditions, providing shade, moisture, and rich detritus layers that sustain a wide array of organisms. Amphibian and reptile populations surged, butterflies and dragonflies nearly doubled, and new microhabitats formed, supporting even ground-dwelling earth snakes and freshwater crabs.

“Biodiversity doesn’t always need a forest. It needs space, complexity, and protection. And we proved that even a home garden could offer that,” Kandambi says.

The site now harbours several threatened species, including the Kelaart’s earth snake (Rhinophis homolepis), the elusive Whistling shrub frog (Pseudophilautus nemus), and the Sri Lanka Brinck’s Shadowdamsel (Ceylonosticta brincki), one of the rarest damselflies in the country.

The long-term monitoring yielded over 18,000 photographic records documenting species behaviours and ecological shifts. Fieldwork was carried out in both dry and wet seasons, during day and night, across 15 years—a remarkable commitment from the research team.

“This isn’t just a garden anymore,”

“It’s a sanctuary sculpted through coexistence. It is proof that small-scale biodiversity conservation is possible even in anthropogenic landscapes”, says Kandambi

An overlooked national asset

Sri Lanka’s home gardens make up roughly 15% of the country’s land area. Yet, despite their ecological potential, they remain largely absent from policy frameworks.

 “We have one of the world’s oldest traditions of integrated agroforestry,” explains  Surasinghe, who is based at Bridgewater State University in the USA.

“But modern planning systems treat home gardens as leftovers—not as vital green infrastructure.”

The researchers argue that in the face of accelerating biodiversity loss, home gardens should be viewed not as “soft” conservation tools, but as frontline ecosystems.

Forest canopy of the home garden (2024)

By protecting native flora and fauna while simultaneously supporting food security, these spaces bridge the gap between people and nature. In doing so, they reinforce the idea that conservation doesn’t have to happen out there—in distant, fenced-off parks—but can be a part of daily life.

“We’re entering a new age of conservation,”

“Where backyard stewardship may matter just as much as big forest reserves,” Karunaratne added.

Beyond their role in preserving species, home gardens provide a multitude of ecosystem services. The multilayered canopies help regulate local microclimates, reduce ambient temperature, and stabilise soil. These functions are especially critical in Sri Lanka’s wet zone, where rising temperatures and erratic rainfall threaten both human and ecological well-being.

Home gardens also sequester carbon, absorb rainwater, and maintain essential pollination networks that are disappearing due to the spread of agrochemicals and monoculture farming.

 “The garden isn’t just a green space—it’s a climate adaptation strategy,” Surasinghe adds.

On the cultural front, these spaces protect traditional knowledge passed down through generations. Medicinal plants, heirloom vegetables, and religiously significant species are commonly cultivated, maintaining biocultural diversity that often gets overlooked in formal conservation.

The garden in Rambukpitiya is no exception. Local varieties of pepper, betel, ginger, and medicinal shrubs like bin kohomba (Clausena indica) and iriveriya (Plectranthus amboinicus) are still grown in harmony with native trees and wildlife.

While the garden itself has thrived, its surrounding landscape paints a more worrying picture. Tea monocultures, exotic pine plantations, and road development have stripped nearby forests. A stream once vital to the garden’s water retention—the Hiddagal Oya—dried up due to upstream vegetation removal.

This desiccation had knock-on effects: native fish species vanished, soil dried faster, and amphibians became more dependent on the microclimates within the garden.

“You can do everything right within your fence, but if your neighbours clear everything outside it, your sanctuary becomes an island,” Karunaratne says.

Fragmentation also threatens pollinators and seed dispersers that rely on connected habitats. Many birds and butterflies observed in the garden are transient visitors. If corridors disappear, these species could vanish from the garden too.

 “That’s why we advocate not just for garden conservation, but for landscape-level connectivity,” Surasinghe insists.

To harness the full potential of home gardens, the researchers call for their formal integration into Sri Lanka’s national biodiversity and land-use planning strategies. Among their recommendations:

Agroecological zoning to encourage native species planting near protected areas

Incentive programmes akin to Costa Rica’s Payment for Ecosystem Services (PES), rewarding garden owners for biodiversity stewardship

Legal protection for riparian buffers to safeguard aquatic biodiversity

A national “Biodiversity-Friendly Garden” certification scheme, enabling eco-labelling and better market access for garden-based produce

Such interventions would not only protect biodiversity but also enhance rural livelihoods, food sovereignty, and ecological awareness among the public.

 “If we can make biodiversity visible, valuable, and profitable in everyday settings, we change the game,” Kandambi notes.

This model isn’t just relevant for rural areas. Urban planners can adopt similar approaches by integrating green corridors into city layouts, linking backyard gardens, parks, and schoolyards to support wildlife movement and resilience.

“With climate change accelerating, we need new kinds of green infrastructure,” Karunaratne argues. “Urban-rural biodiversity corridors could be just as important as highways.”

The study also highlights the role of environmental education and community participation. Garden owners are not passive caretakers; they become active observers, recorders, and even scientists. This participatory approach, grounded in field documentation, also cultivates environmental empathy.

One of the key findings is the sheer number of people who became involved over time—from neighbours curious about a rare frog call, to school children who came to observe butterflies for class projects. The garden became an informal field school, sparking a new generation of conservation-minded youth.

 “We didn’t set out to start a movement. But that’s what it became—a quiet ripple that showed people how much life exists if we only stop to look,” Karunaratne reflects.

In the Anthropocene, where climate disruption and species extinction define our era, Sri Lanka’s home gardens offer not just hope—but a working model of coexistence. The Rambukpitiya garden proves that conservation doesn’t have to be costly, technocratic, or far away. It can be cultivated, literally, from the ground up.

“This garden taught us that the battle for biodiversity might be won not only in parliament or in forests, but in the hearts and habits of ordinary people,” Karunaratne concludes.

With political will, community buy-in, and scientific support, Sri Lanka has a rare opportunity to transform its home gardens from overlooked backyards into a nationwide ecological shield—where every jackfruit tree, every butterfly, and every rain-fed spring tells a story of survival, resilience, and renewal.

By Ifham Nizam ✍️



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Retirement age for judges: Innovation and policy

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I. The Constitutional Context

Independence of the judiciary is, without question, an essential element of a functioning democracy. In recognition of this, ample provision is made in the highest law of our country, the Constitution, to engender an environment in which the courts are able to fulfil their public responsibility with total acceptance.

As part of this protective apparatus, judges of the Supreme Court and the Court of Appeal are assured of security of tenure by the provision that “they shall not be removed except by an order of the President made after an address of Parliament supported by a majority of the total number of members of Parliament, (including those not present), has been presented to the President for such removal on the ground of proved misbehaviour or incapacity”[Article 107(2)]. Since this assurance holds good for the entirety of tenure, it follows that the age of retirement should be defined with certainty. This is done by the Constitution itself by the provision that “the age of retirement of judges of the Supreme Court shall be 65 years and of judges of the Court of Appeal shall be 63 years”[Article 107(5)].

II. A Proposal for Reform

This provision has been in force ever since the commencement of the Constitution. Significant public interest, therefore, has been aroused by the lead story in a newspaper, Anidda of 13 March, that the government is proposing to extend the term of office of judges of the Supreme Court and the Court of Appeal by a period of two years.

This proposal, if indeed it reflects the thinking of the government, is deeply disturbing from the standpoint of policy, and gives rise to grave consequences. The courts operating at the apex of the judicial structure are called upon to do justice between citizens and also between the state and members of the public. It is an indispensable principle governing the administration of justice that not the slightest shadow of doubt should arise in the public mind regarding the absolute objectivity and impartiality with which the courts approach this task.

What is proposed, if the newspaper report is authentic, is to confer on judges of two particular courts, the Supreme Court and the Court of Appeal, a substantial benefit or advantage in the form of extension of their years of service. The question is whether the implications of this initiative are healthy for the administration of justice.

III. Governing Considerations of Policy

What is at stake is a principle intuitively identified as a pillar of justice.

Reflecting firm convictions, the legal antecedents reiterate the established position with remarkable emphasis. The classical exposition of the seminal standard is, of course, the pronouncement by Lord Hewart: “It is not merely of some importance, but is of fundamental importance that justice should not only be done, but should manifestly and undoubtedly be seen to be done”. (Rex v. Sussex Justices, ex parte McCarthy). The underlying principle is that perception is no less important than reality. The mere appearance of partiality has been held to vitiate proceedings: Dissanayake v. Kaleel. In particular, reasonableness of apprehension in the mind of the parties to litigation is critical: Ranjit Thakur v. Union of India, a reasonable likelihood of bias being necessarily fatal (Manak Lal v. Prem Chaud Singhvi).

The overriding factor is unshaken public confidence in the judiciary: State of West Bengal v. Shivananda Pathak. The decision must be “demonstrably” (Saleem Marsoof J.) fair. The Bar Association of Sri Lanka has rightly declared: “The authority of the judiciary ultimately depends on the trust reposed in it by the people, which is sustained only when justice is administered in a visibly fair manner”.

Credibility is paramount in this regard. “Justice has to be seen to be believed” (J.B. Morton). Legality of the outcome is not decisive; process is of equal consequence. Judicial decisions, then, must withstand public scrutiny, not merely legal technicality: Mark Fernando J. in the Jana Ghosha case. Conceived as continuing vitality of natural justice principles, these are integral to justice itself: Samarawickrema J. in Fernando v. Attorney General. Institutional integrity depends on eliminating even the appearance of partiality (Mandal Vikas Nigam Ltd. v. Girja Shankar Pant), and “open justice is the cornerstone of our judicial system”: (Sahara India Real Estate Corporation Ltd. v. SEBI).

IV. Practical Constraints

Apart from these compelling considerations of policy, there are practical aspects which call for serious consideration. The effect of the proposal is that, among all judges operating at different levels in the judicature of Sri Lanka, judges of the Supreme Court and the Court of Appeal only, to the exclusion of all other judges, are singled out as the beneficiaries of the proposal. An inevitable result is that High Court and District Judges and Magistrates will find their avenues of promotion seriously impeded by the unexpected lengthening of the periods of service of currently serving judges in the two apex courts. Consequently, they will be required to retire at a point of time appreciably earlier than they had anticipated to relinquish judicial office because the prospect of promotion to higher courts, entailing higher age limits for retirement, is precipitately withdrawn. Some degree of demotivation, arising from denial of legitimate expectation, is therefore to be expected.

A possible response to this obvious problem is a decision to make the two-year extension applicable to all judicial officers, rather than confining it to judges of the two highest courts. This would solve the problem of disillusionment at lower levels of the judiciary, but other issues, clearly serious in their impact, will naturally arise.

Public service structures, to be equitable and effective, must be founded on principles of non-discrimination in respect of service conditions and related matters. Arbitrary or invidious treatment is destructive of this purpose. In determining the age of retirement of judges of the Supreme Court and the Court of Appeal, some attention has been properly paid to balance and consistency. The age of retirement of a Supreme Court judge is on par with that applicable to university professors and academic staff in the higher education system. They all retire at 65 years. Members of the public service, generally, retire at 60. Medical specialists retire at 63, with the possibility of extension in special circumstances to 65. The age of retirement for High Court Judges is 61, and for Magistrates and District Judges 60. It may be noted that the policy change in 2022 aimed at specifically addressing the issue of uniformity and compatibility.

If, then, an attempt is made to carve out an ad hoc principle strictly limited to judicial officers, not admitting of a self-evident rationale, the question would inevitably arise whether this is fair by other categories of the public service and whether the latter would not entertain a justifiable sense of grievance.

This is not merely a moral or ethical issue relating to motivation and fulfillment within the public service, but it could potentially give rise to critical legal issues. It is certainly arguable that the proposed course of action represents an infringement of the postulate of equality of treatment, and non-discrimination, enshrined in Article 12(1) of the Constitution.

There would, as well, be the awkward situation that this issue, almost certain to be raised, would then have to be adjudicated upon by the Supreme Court, itself the direct and exclusive beneficiary of the impugned measure.

V. Piecemeal Amendment or an Overall Approach?

If innovation on these lines is contemplated, would it not be desirable to take up the issue as part of the new Constitution, which the government has pledged to formulate and enact, rather than as a piecemeal amendment at this moment to the existing Constitution? After all, Chapter XV, dealing with the Judiciary, contains provisions interlinked with other salient features of the Constitution, and an integrated approach would seem preferable.

VI. Conclusion

In sum, then, it is submitted that the proposed change is injurious to the institutional integrity of the judiciary and to the prestige and stature of judges, and that it should not be implemented without full consideration of all the issues involved.

By Professor G. L. Peiris
D. Phil. (Oxford), Ph. D. (Sri Lanka);
Former Minister of Justice, Constitutional Affairs and National Integration;
Quondam Visiting Fellow of the Universities of Oxford, Cambridge and London;
Former Vice-Chancellor and Emeritus Professor of Law of the University of Colombo.

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Ranked 134th in Happiness: Rethinking Sri Lanka’s development through happiness, youth wellbeing and resilience

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In recent years, Sri Lanka has experienced a succession of overlapping challenges that have tested its resilience. Cyclone Ditwah struck Sri Lanka in November last year, significantly disrupting the normal lives of its citizens. The infrastructure damage is much more serious than the tsunami. According to World Bank reports and preliminary estimates, the losses amounted to approximately US$ 4.1 billion, nearly 4 per cent of the country’s Gross Domestic Product. Before taking a break from that, the emerging crisis in the Middle East has once again raised concerns about potential economic repercussions. In particular, those already affected by disasters such as Cyclone Ditwah risk falling “from the frying pan into the fire,” facing multiple hardships simultaneously. Currently, we see fuel prices rising, four-day workweeks, a higher cost of living, increased pressure on household incomes, and a reduction in the overall standard of living for ordinary citizens. It would certainly affect people’s happiness. As human beings, we naturally aspire to live happy and fulfilling lives. At a time when the world is increasingly talking about happiness and wellbeing, the World Happiness Report provides a useful way of looking at how countries are doing. The World Happiness Report discusses global well-being and offers strategies to improve it. The report is produced annually with contributions from the University of Oxford’s Wellbeing Research Centre, Gallup, the UN Sustainable Development Solutions Network, and other stakeholders. There are many variables taken into consideration for the index, including the core measure (Cantril Ladder) and six explanatory variables (GDP per Capita ,Social Support,Healthy Life Expectancy,Freedom to Make Life Choices,Generosity,Perceptions of Corruption), with a final comparison.

According to the recently published World Happiness Report 2026, Sri Lanka ranks 134th out of 147 nations. As per the report, this is the first time that Sri Lanka has suffered such a decline. Sri Lanka currently trails behind most of its South Asian neighbours in the happiness index. The World Happiness Report 2026 attributes Sri Lanka’s low ranking (134th) to a combination of persistent economic struggles, social challenges, and modern pressures on younger generations. The 2026 report specifically noted that excessive social media use is a growing factor contributing to declining life satisfaction among young people globally, including in Sri Lanka. This calls for greater vigilance and careful reflection. These concerns should be examined alongside key observations, particularly in the context of education reforms in Sri Lanka, which must look beyond their immediate scope and engage more meaningfully with the country’s future.

In recent years, a series of events has triggered political upheaval in countries such as Nepal, characterised by widespread protests, government collapse, and the emergence of interim administration. Most reports and news outlets described this as “Gen Z protests.” First, we need to understand what Generation Z is and its key attributes. Born between 1997 and 2012, Generation Z represents the first truly “digital native” generation—raised not just with the internet, but immersed in it. Their lives revolve around digital ecosystems: TikTok sets cultural trends, Instagram fuels discovery, YouTube delivers learning, and WhatsApp sustains peer communities. This constant, feed-driven engagement shapes not only how they consume content but how they think, act, and spend. Tech-savvy and socially aware, Gen Z holds brands to a higher standard. For them, authenticity, transparency, and accountability—especially on environmental and ethical issues—aren’t marketing tools; they’re baseline expectations. We can also observe instances of them becoming unnecessarily arrogant in making quick decisions and becoming tools of some harmful anti-social ideological groups. However, we must understand that any generation should have proper education about certain aspects of the normal world, such as respecting others, listening to others, and living well. More interestingly, a global survey by the McKinsey Health Institute, covering 42,083 people across 26 countries, finds that Gen Z reports poorer mental health than older cohorts and is more likely to perceive social media as harmful.

Youth health behaviour in Sri Lanka reveals growing concerns in mental health and wellbeing. Around 18% of youth (here, school-going adolescents aged 13-17) experience depression, 22.4% feel lonely, and 11.9% struggle with sleep due to worry, with issues rising alongside digital exposure. Suicide-related risks are significant, with notable proportions reporting thoughts, plans, and attempts, particularly among females. Bullying remains a significant concern, particularly among males, with cyberbullying emerging as a notable issue. At the same time, substance use is increasing, including tobacco, smokeless tobacco, and e-cigarettes. These trends highlight the urgent need for targeted interventions to support youth mental health, resilience, and healthier behavioural outcomes in Sri Lanka. We need to create a forum in Sri Lanka to keep young people informed about this. Sri Lanka can designate a date (like April 25th) as a National Youth Empowerment Day to strengthen youth mental health and suicide prevention efforts. This should be supported by a comprehensive, multi-sectoral strategy aligned with basic global guidelines. Key priorities include school-based emotional learning, counselling services, and mental health training for teachers and parents. Strengthening data systems, reducing access to harmful means, and promoting responsible media reporting are essential. Empowering families and communities through awareness and digital tools will ensure this day becomes a meaningful national call to action.

As discussed earlier, Sri Lanka must carefully understand and respond to the challenges arising from its ongoing changes. Sri Lanka should establish an immediate task force comprising responsible stakeholders to engage in discussions on ongoing concerns. Recognising that it is not a comprehensive solution, the World Happiness Index can nevertheless act as an important indicator in guiding a paradigm shift in how we approach education and economic development. For a country seeking to reposition itself globally, Sri Lanka must adopt stronger, more effective strategies across multiple sectors. Building a resilient and prosperous future requires sound policymaking and clear strategic direction.

(The writer is a Professor in Management Studies at the Open University of Sri Lanka. You can reach Professor Abeysekera via nabey@ou.ac.lk)

by Prof. Nalin Abeysekera

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Hidden diversity in Sri Lanka’s killifish revealed: New study reshapes understanding of island’s freshwater biodiversity

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Aplocheilus parvus

A groundbreaking new study led by an international team of scientists, including Sri Lankan researcher Tharindu Ranasinghe, has uncovered striking genetic distinctions in two closely related killifish species—reshaping long-standing assumptions about freshwater biodiversity shared between Sri Lanka and India.

Published recently in Zootaxa, the research brings together leading ichthyologists such as Hiranya Sudasinghe, Madhava Meegaskumbura, Neelesh Dahanukar and Rajeev Raghavan, alongside other regional experts, highlighting a growing South Asian collaboration in biodiversity science.

For decades, scientists debated whether Aplocheilus blockii and Aplocheilus parvus were in fact the same species. But the new genetic analysis confirms they are “distinct, reciprocally monophyletic sister species,” providing long-awaited clarity to their taxonomic identity.

Speaking to The Island, Ranasinghe said the findings underscore the hidden complexity of Sri Lanka’s freshwater ecosystems.

“What appears superficially similar can be genetically very different,” he noted. “Our study shows that even widespread, common-looking species can hold deep evolutionary histories that we are only now beginning to understand.”

A tale of two fishes

The study reveals that Aplocheilus blockii is restricted to peninsular India, while Aplocheilus parvus occurs both in southern India and across Sri Lanka’s lowland wetlands.

Despite their close relationship, the two species show clear genetic separation, with a measurable “genetic gap” distinguishing them. Subtle physical differences—such as the pattern of iridescent scales—also help scientists tell them apart.

Co-author Sudasinghe, who has led several landmark studies on Sri Lankan freshwater fishes, noted that such integrative approaches combining genetics and morphology are redefining taxonomy in the region.

Echoes of ancient land bridges

The findings also shed light on the ancient biogeographic links between Sri Lanka and India.

Scientists believe that during periods of low sea levels in the past, the two landmasses were connected by the now-submerged Palk Isthmus, allowing freshwater species to move between them.

Later, rising seas severed this connection, isolating populations and driving genetic divergence.

“These fishes likely dispersed between India and Sri Lanka when the land bridge existed,” Ranasinghe said. “Subsequent isolation has resulted in the patterns of genetic structure we see today.”

Meegaskumbura emphasised that such patterns are increasingly being observed across multiple freshwater fish groups in Sri Lanka, pointing to a shared evolutionary history shaped by geography and climate.

A deeper genetic divide

One of the study’s most striking findings is that Sri Lankan populations of A. parvus are genetically distinct from those in India, with no shared haplotypes between the two regions.

Dahanukar explained that this level of differentiation, despite relatively recent geological separation, highlights how quickly freshwater species can diverge when isolated.

Meanwhile, Raghavan pointed out that these findings reinforce the importance of conserving habitats across both countries, as each region harbours unique genetic diversity.

Implications for conservation

The study carries important implications for conservation, particularly in a country like Sri Lanka where freshwater ecosystems are under increasing pressure from development, pollution, and climate change.

Ranasinghe stressed that understanding genetic diversity is key to protecting species effectively.

“If we treat all populations as identical, we risk losing unique genetic lineages,” he warned. “Conservation planning must recognise these hidden differences.”

Sri Lanka is already recognised as a global biodiversity hotspot, but studies like this suggest that its biological richness may be even greater than previously thought.

A broader scientific shift

The research also contributes to a growing body of work by scientists such as Sudasinghe and Meegaskumbura, challenging traditional assumptions about species distributions in the region.

Earlier studies often assumed that many freshwater fish species were shared uniformly between India and Sri Lanka. However, modern genetic tools are revealing a far more complex picture—one shaped by ancient geography, climatic shifts, and evolutionary processes.

“We are moving from a simplistic view of biodiversity to a much more nuanced understanding,” Ranasinghe said. “And Sri Lanka is proving to be a fascinating natural laboratory for this kind of research.”

Looking ahead

The researchers emphasise that much remains to be explored, with several freshwater fish groups in Sri Lanka still poorly understood at the genetic level.

For Sri Lanka, the message is clear: beneath its rivers, tanks, and wetlands lies a largely untapped reservoir of evolutionary history.

As Ranasinghe puts it:

“Every stream could hold a story of millions of years in the making. We are only just beginning to read them.”

By Ifham Nizam

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