THE ARCHIVE AT THE EDGE OF THE WORLD.

There is a corridor of land on the north-eastern coast of Queensland — narrow by continental standards, vast in terms of biological consequence — where the world’s oldest surviving tropical rainforest meets the planet’s largest coral reef system. The Wet Tropics of Queensland World Heritage Area stretches roughly 450 kilometres along the coast between Townsville and Cooktown, covering approximately 8,940 square kilometres of ancient forest, fast-flowing rivers, rugged mountain ranges, and coastal lowlands. Adjacent to it, separated in places by barely a tree line, lies the Great Barrier Reef Marine Park. The association of fringing coral reefs and rainforest coastline in the Cape Tribulation region is not found elsewhere in Australia and is rare in the world. What sits within this corridor is not merely spectacular landscape. It is a living archive — the most concentrated accumulation of species, evolutionary lineages, and ecological processes in the Australian continent, and among the most significant on Earth.

James Cook University was built here deliberately. Its campuses in Townsville and Cairns were not placed in the tropics by accident of history or administrative convenience. They were placed at the edge of this archive because someone understood, in the formative decades of Australian higher education, that proximity to this kind of biological richness was itself an intellectual resource — and that the scientific questions raised by such richness demanded a permanent, locally rooted institution to pursue them. Over the decades since its establishment, JCU has grown into something unique within the global university landscape: an institution whose entire research architecture is organised around the biological, ecological, and climatic character of the tropics. Its onchain civic identity, carried at jcu.queensland, reflects that permanent anchoring — a university not just located in the tropics but constituted by them.

This essay concerns one dimension of that constitution: JCU’s research into tropical biodiversity. Not the Great Barrier Reef specifically — that is covered in other work in this series — but the broader ecological picture: the terrestrial rainforests, the freshwater and coastal wetland systems, the savannahs and dry tropics, and the extraordinary density of species, many found nowhere else on Earth, that JCU researchers are working to understand, monitor, and protect.

THE NUMBERS BEHIND THE CLAIM.

The word “biodiversity hotspot” is used loosely in public discourse. It is worth spending time with what the Wet Tropics actually represents in quantitative terms, because the numbers are genuinely remarkable and they form the empirical foundation for everything JCU’s biodiversity research is attempting to do.

The area covers 0.1% of the Australian landmass but contains 50 per cent of all the nation’s species. That single statistic encodes an extraordinary degree of biological concentration. Within this World Heritage Area, the area supports an exceptionally high level of diversity of both flora and fauna, with over 3,000 vascular plant species in 224 families, of which 576 species and 44 genera are endemic, including two endemic plant families. Among vertebrates, the numbers compound: vertebrate diversity and endemism are also very high, with 107 mammal species including 11 endemic species and two monotypic endemic genera. In terms of avifauna, there are 368 bird species, of which 11 species are endemic. For reptiles, there are 113 species of which 24 species are endemic, including three monotypic endemic genera. The diversity of amphibians includes 51 species of which 22 are endemic.

The tropical forests have the highest concentration of primitive flowering plant families in the world. This is not a regional boast but a globally verified scientific observation: the Wet Tropics contains 16 of the 28 ancient lineages of primitive flowering plants, more than anywhere else in the world. The ancient ancestry of this landscape matters enormously for science. The area presents an unparalleled record of the ecological and evolutionary processes that shaped the flora and fauna of Australia, containing living relics of the Gondwana Rainforest that covered Australia 50 to 100 million years ago. To work in this landscape as a biologist is to work in a living record of continental evolution. To work here as an ecologist is to observe processes — speciation, endemism, co-evolution, refugia dynamics — that are available nowhere else in Australia in such an undisturbed and measurable form.

JCU is a university for the Tropics, a region that is home to 80 per cent of the world’s terrestrial species and over 90 per cent of its mangroves and reef-building corals — a broader geographic frame that contextualises the Wet Tropics within the global tropics, and which defines the scope of JCU’s research mandate. The university is not simply studying one exceptional patch of Australian ecology. It is developing the methods, the taxonomic knowledge, and the ecological frameworks needed to understand tropical biodiversity wherever it occurs on Earth.

THE INFRASTRUCTURE OF INQUIRY: FIELD STATIONS AND LIVING LABORATORIES.

Research of this kind requires proximity. Theoretical ecology conducted at a distance from the organisms it models is ultimately constrained. JCU has invested substantially in placing its researchers inside the ecosystems they study, through a network of field stations and research installations that function as permanent scientific infrastructure embedded in the landscape.

The most distinctive of these is the Daintree Rainforest Observatory, located within the World Heritage Wet Tropics rainforest near Cape Tribulation in Far North Queensland. As the only field station in Australia operating a rainforest canopy crane and one of only five long-term ecological monitoring sites in Australia, the DRO provides unique opportunities to be immersed in the subject of your study. The canopy crane is not a minor facility. Perhaps as much as half of all biodiversity on Earth is to be found in tropical rainforests, and a large proportion of this biodiversity is located in the canopy itself. First trialled by the Smithsonian Tropical Research Institute in Panama, the use of industrial cranes in tropical forests has opened up the canopy to exploration by scientists in the same way that the deep-sea submersible has provided access to the ocean floor.

The canopy is the engine room of a tropical rainforest — the zone of maximum photosynthesis, maximum biotic interaction, and, for researchers, maximum historical inaccessibility. The crane at the Daintree Rainforest Observatory changes that. Research is performed in a diverse range of fields including ecology, hydrology, plant physiology, animal behaviour, entomology and mycology. Research projects include the simulation of an extended drought to see what effect climate change may have on rainforests, experiments into regenerating rainforests, and studies on unique species such as the peppermint stick insect. The facility operates permanently, accumulating long-term datasets — on leaf-litter fall, phenology, and species composition — that are available to researchers globally. It also has the highest biodiversity of any ecosystem in Australia, with at least 663 vertebrate species calling the Daintree home, along with as many as 40,000 species of insects.

Beyond the Daintree, JCU maintains research infrastructure across the full ecological range of the tropics: from the Orpheus Island Research Centre on the Great Barrier Reef to the Fletcherview Research Station in the dry savannahs of the outback. JCU is home to more than 20 specialist centres and institutes, and maintains island, rainforest and outback research stations. This geographic spread is deliberate. The tropics are not ecologically homogeneous. The wet-dry gradient from the Daintree coast to the interior savannahs represents a span of ecological types — each with its own species assemblages, its own disturbance regimes, its own vulnerability profiles — and JCU’s physical infrastructure tracks that gradient.

THE CENTRES: CTBCC, TESS, AND TROPWATER.

The institutional architecture through which JCU organises its biodiversity research reflects the complexity of the problems being addressed. Three research centres are particularly relevant to the ecology and biodiversity cluster.

The Centre for Tropical Biodiversity and Climate Change (CTBCC) is the institution’s dedicated focus for terrestrial biodiversity research in the context of climate change. The research objective of the Centre is to build a world-leading, multi-disciplinary research centre to examine the impacts of global climate change on the natural environment, developing predictions of impacts and extinction risk based on detailed knowledge of species ecology, using sophisticated spatial modelling. The Centre’s work has ranged across the Wet Tropics vertebrate fauna — birds, mammals, reptiles, frogs — and has expanded in recent years to include plants, invertebrates, and ecosystems across Central Queensland and Cape York. Its research builds on a wealth of knowledge on the rainforest biodiversity of the region accumulated over 16 years of intensive data collection.

A key concern running through CTBCC’s research is the particular vulnerability of tropical species to climate change. Unlike temperate species, many tropical organisms are physiologically adapted to narrow environmental ranges. With even a small increase in temperature, large declines in the range size for almost every endemic vertebrate species confined to the property are predicted. This is not an abstract modelling concern — it is an empirical reality being documented in populations of rainforest birds, lizards, and frogs in the Wet Tropics, where changes in distribution and abundance are already being recorded.

The Centre for Tropical Environmental and Sustainability Science (TESS) takes a different but complementary approach, with research geographically focused on tropical Australia, a wide array of locales in the Asia-Pacific region, and elsewhere including the Amazon Basin, Andes, and tropical Africa. This global reach is significant. JCU’s expertise is not parochial. The methods, the taxonomic frameworks, and the monitoring protocols developed through research in North Queensland are being applied to tropical systems worldwide.

The Centre for Tropical Water and Aquatic Ecosystem Research — known as TropWATER — addresses the aquatic dimension of tropical biodiversity with comparable depth. TropWATER, James Cook University’s Centre for Tropical Water and Aquatic Ecosystem Research, brings together leading researchers to tackle critical environmental issues. It provides science-based solutions to industries, communities, and governments for managing, protecting, and restoring tropical ecosystems. It brings together over 150 research and supporting staff and over 100 postgraduate students into one cohesive group. TropWATER’s research spans the full aquatic spectrum: freshwater systems, estuaries, seagrass meadows, mangrove forests, inshore coral reefs, and the megafauna — dugongs, turtles, manta rays — that depend on them.

TropWATER houses Australia’s largest seagrass research group and has more than 40 years of experience in seagrass research and monitoring across the Great Barrier Reef, Great Sandy Strait and northern Australia. The significance of seagrass to biodiversity is often underappreciated outside scientific circles. Seagrass meadows function as nursery habitat for juvenile fish, as primary food source for dugongs and green turtles, and as carbon-sequestering ecosystems. When seagrass declines — due to poor water quality, cyclone damage, or flooding — its effects cascade through food webs in ways that JCU researchers have spent decades documenting.

The mangrove research conducted within TropWATER represents another critical thread. The Gulf of Carpentaria mangrove dieback documented by JCU researchers — in which an estimated 40 million mangrove trees died along 2,000 kilometres of coastline in northern Australia — was identified as the worst incidence of climate-related mass tree dieback recorded globally. Nearly 40 million mangrove trees died along 2,000 kilometres of coastline in northern Australia’s remote Gulf region, releasing nearly one million tonnes of carbon. More than 76 km² of mangroves were lost, making this the worst incidence of climate-related mass tree dieback that has ever occurred globally. Research of this kind has direct policy implications: it enters the scientific record that informs international climate negotiations, national biodiversity strategies, and coastal management frameworks.

ENDEMISM, EXTINCTION RISK, AND THE BURDEN OF UNIQUENESS.

The biological richness of the Wet Tropics and the broader tropical Queensland region carries a burden that JCU’s researchers are acutely aware of: many of the species most unique to this landscape are simultaneously among the most threatened. Many endemic plants and animals are also rare, being found only in limited areas of the Wet Tropics. They may be restricted to certain habitats — cool, misty mountaintops, for instance, like the Thornton Peak skink — or restricted to a limited geographic area like the Kuranda tree frog.

This pattern — extreme endemism combined with restricted range — makes species simultaneously scientifically irreplaceable and conservation-critical. As of 2023, of the area’s vascular plants alone, 314 species were classified under the Nature Conservation Act 1992 or the Environment Protection and Biodiversity Conservation Act 1999 as vulnerable, endangered or critically endangered. The Queensland Government’s State of the Environment Report for 2024 notes that some of the world’s rarest and most threatened species live only in this area. Overall, many of the area’s ancient and endemic animal species supporting Outstanding Universal Value are declining and in serious and urgent danger.

The logic of extinction pressure in this landscape operates differently from elsewhere in Australia. In the Wet Tropics, many species are montane — confined to high-altitude rainforest that exists as an island of suitable climate surrounded by lowland habitat that will become unsuitable as temperatures rise. As the climate warms, these species’ thermal refugia shrink upward, eventually running out of mountain. The mathematical geometry of this predicament — called “mountain-top extinction” in the ecological literature — is one of the major research concerns of JCU’s CTBCC, and one that JCU researchers have contributed substantially to documenting and modelling.

The CTBCC has established an inclusive, multi-disciplinary and powerful network of over 800 researchers and stakeholders from 110 institutions across Australia, and internationally, that have experience in all major ecosystems, taxonomic groups and fields of expertise necessary for success. This network structure is itself scientifically significant. Biodiversity research at the necessary scale cannot be conducted by a single institution working alone. The coordination of long-term monitoring data, genetic sampling, species distribution modelling, and climate projections across an entire bioregion demands the kind of institutional network that JCU has helped to build and now sits at the centre of.

INDIGENOUS ECOLOGICAL KNOWLEDGE AND RESEARCH PARTNERSHIP.

Any account of JCU’s biodiversity research that did not acknowledge the Indigenous dimension would be incomplete. The Wet Tropics World Heritage Area is not simply a scientific resource or a protected landscape. The Aboriginal Rainforest People of the Wet Tropics of Queensland have lived continuously in the rainforest environment for at least 5,000 years, and this is the only place in Australia where Aboriginal people have permanently inhabited a tropical rainforest environment. Rainforest Aboriginal Peoples of the Wet Tropics are extraordinarily diverse and represent at least 20 tribal groups, 120 clans and eight language groups — currently more than 20,000 people hold ongoing traditional connections to land in the Area.

This is not context for the science — it is part of the science. Traditional ecological knowledge accumulated over millennia, applied to the monitoring and management of species and habitats, represents a form of long-term data that complements and extends the temporal range of any modern monitoring program. JCU’s research centres have increasingly formalised these partnerships. TropWATER works alongside Traditional Owners and Indigenous Rangers across a range of programs: collaborations include mapping seagrass and coral reefs on Sea Country, conducting Traditional Owner-led dugong surveys, monitoring mangrove shorelines, performing eDNA monitoring of invasive species, and participating in wetland protection initiatives, among many other activities.

In the Gulf of Carpentaria, TropWATER researchers have been working with Marranbala and li-Anthawirriyarra Rangers to survey the seafloor habitats and fish communities of Marra Sea Country. During these surveys, they are providing hands-on technical training to help establish an ongoing Ranger-led monitoring program of the rich biodiversity in their Sea Country. So far, researchers have identified over 100 species of fish and 80 species of invertebrates, and mapped seagrass forming a meadow over 65 km long. This is collaborative science: it builds local capacity, incorporates Traditional knowledge systems, and produces data at scales and in locations that research institutions operating alone could not reach.

TECHNOLOGY, SCALE, AND THE NEW ECOLOGY.

The complexity of tropical biodiversity — its sheer number of species, its spatial extent, its rate of ecological change — poses fundamental methodological challenges. Traditional survey methods, adequate for documenting biodiversity in simpler ecosystems, cannot keep pace with what is happening in the tropics. JCU’s research centres have responded by investing in a suite of new technologies that are changing what can be observed, and at what scale.

Environmental DNA — eDNA — allows researchers to detect the presence of species from genetic traces left in water, sediment, or soil, without needing to physically observe the organism. Invasive species pose major threats to Australian biodiversity, agriculture, and lifestyle, and early detection is critical to limit their spread. Environmental DNA can fast-track detection of invasive species by using the genetic traces they leave behind — enabling a rapid biosecurity response. The same methodology applies to rare and threatened native species: detecting a species’ presence without disturbing it, or detecting its absence — confirming extinction or local extirpation — at a scale and cost that traditional survey methods cannot match.

Drones, remote sensing, artificial intelligence, and acoustic monitoring are being deployed across TropWATER and TESS research programs to monitor habitat extent, track species populations, and detect ecological change at the landscape scale. Technology is revolutionising the way scientists monitor, research and uncover new information about habitats and species. JCU researchers are at the forefront of testing the feasibility of new technologies, including eDNA, drones and AI. The implications for conservation management are significant: it becomes possible to monitor not just selected research sites but the condition of entire ecosystems across thousands of square kilometres, generating the kind of spatially comprehensive data that adaptive management of tropical biodiversity actually requires.

JCU achieved the ranking of ‘world class’ or higher in 83 percent of research fields, including eight as ‘well above world class’, by Excellence in Research for Australia for 2018. The Centre for World University Rankings has placed JCU first in the world for Marine and Freshwater Biology, with a second-place ranking for Biodiversity Conservation. JCU is ranked number one in the world for Marine and Freshwater Biology and number two in the world for Biodiversity Conservation. These rankings reflect not merely the quantity of JCU’s research output but its quality and influence within the global scientific community — its capacity to set agendas, train the next generation of tropical biologists, and supply the knowledge that governments and conservation bodies need to act.

PERMANENCE, PRESENCE, AND THE CIVIC WEIGHT OF PLACE.

There is a deeper argument to be made about what it means for a university to be genuinely embedded in a place. Not administratively located there, not merely conducting fieldwork there, but constituted by the ecological and cultural character of that place in ways that shape its entire research mission, its institutional identity, and its sense of obligation to the future.

James Cook University inhabits the Wet Tropics and the surrounding landscapes of tropical Queensland in this deeper sense. Its researchers have spent decades building the taxonomic baseline — the lists, the distributions, the population estimates — without which it is impossible to detect change or loss. They have established long-term monitoring programs that will still be generating data decades from now. They have trained generations of tropical ecologists who have dispersed across Australia and the world carrying methods and perspectives formed in this particular landscape.

"Tropical biodiversity is one of the wonders of our natural world. Understanding why the tropics has so many species has fascinated scientists for hundreds of years."

That observation, drawn from the State of Wet Tropics Report, identifies something that goes beyond policy or conservation management. It touches the character of the scientific enterprise itself — the sheer curiosity that this landscape provokes, its capacity to generate questions that matter not just locally but universally. Why does the tropics support so many species? How do ancient evolutionary lineages persist? What does extreme endemism tell us about the mechanisms of speciation? These are questions of fundamental biological significance, and JCU is among the small number of institutions in the world positioned to pursue them from within the living systems that make them tractable.

The urgency of that pursuit is not diminishing. Due to climate change impacts, invasive species, and habitat degradation, the trend continues to decline for several ecosystems, including upland rainforest, wet sclerophyll and freshwater ecosystems. The Wet Tropics that JCU researchers study today is not the Wet Tropics of fifty years ago, and it will not be the Wet Tropics of fifty years hence without the intervention of knowledge, policy, and management built on rigorous science. The question is whether the scientific capacity to understand and respond to that change can keep pace with the change itself.

That is precisely the question that animates JCU’s biodiversity research program. And it is why the civic permanence of this institution — its rootedness in North Queensland, its decades of accumulated ecological knowledge, its network of researchers, monitoring infrastructure, and Indigenous partnerships — matters as much as any single research finding. Institutions endure in ways that individual studies cannot. The data accumulates. The monitoring continues. The taxonomic knowledge deepens.

jcu.queensland names that permanence in the terms of the present moment: a university onchain, anchored to place, committed to the biological archive it was built to understand. The tropics are changing rapidly, and the archive — the species, the lineages, the ecological relationships accumulated across millions of years — is under pressure from every direction. What endures, in that context, is not any single discovery but the institutional capacity to keep discovering, to keep watching, and to keep telling the world what is being lost and what might yet be saved.