
Chris J. JollyMacquarie University · School of Natural Sciences
Chris J. Jolly
Doctor of Philosophy
About
55
Publications
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Introduction
Chris Jolly is a Macquarie Research Fellow in the School of Natural Sciences. He studies how animals adjust to a rapidly changing world, and how we may exploit these pathways of change to help animals adjust more rapidly. His research involves using behavioural ecology and evolutionary biology to improve conservation of terrestrial vertebrates. Currently his focus is improving survival of animals in an increasingly fire-prone world.
Additional affiliations
July 2016 - October 2020
November 2020 - December 2021
Publications
Publications (55)
When imperilled by a threatening process, the choice is often made to conserve threatened species on offshore islands that typically lack the full suite of mainland predators. While keeping the species extant, this releases the conserved population from predator-driven natural selection. Antipredator traits are no longer maintained by natural selec...
Cultural adaptation is one means by which conservationists may help populations adapt to threats. A learned behavior may protect an individual from a threat, and the behavior can be transmitted horizontally (within generations) and vertically (between generations), rapidly conferring population‐level protection. Although possible in theory, it rema...
The arrival of novel predators can trigger trophic cascades driven by shifts in prey numbers. Predators also elicit behavioral change in prey populations, via phenotypic plasticity and/or rapid evolution, and such changes may also contribute to trophic cascades. Here, we document rapid demographic and behavioral changes in populations of a prey spe...
Earth's rapidly warming climate is propelling us towards an increasingly fire-prone future. Currently, knowledge of the extent and characteristics of animal mortality rates during fire remains rudimentary, hindering our ability to predict how animal populations may be impacted in the future. To address this knowledge gap, we conducted a global syst...
It can be challenging to reliably detect rare or cryptic species. Environmental DNA (eDNA) is an emerging tool for detecting species and is increasingly being used to detect reptiles in terrestrial environments that are costly or difficult to survey or monitor using traditional methods. Here, we trialled eDNA metabarcoding to detect one of Australi...
Earth’s old animals are in decline. Despite this, emerging research is revealing the vital contributions of older individuals to cultural transmission, population dynamics, and ecosystem processes and services. Often the largest and most experienced, old individuals are most valued by humans and make important contributions to reproduction, informa...
With large wildfires becoming more frequent1,2, we must rapidly learn how megafires impact biodiversity to prioritize mitigation and improve policy. A key challenge is to discover how interactions among fire-regime components, drought and land tenure shape wildfire impacts. The globally unprecedented3,4 2019–2020 Australian megafires burnt more tha...
Climate change is altering fire regimes globally, leading to an increased incidence of large and severe wildfires, including gigafires (>100,000 ha), that homogenise landscapes. Despite this, our understanding of how large, severe wildfires affect biodiversity at the landscape scale remains limited.
We investigated the impact of a gigafire that occ...
As urbanization expands globally, human–wildlife interactions will inevitably increase. Here, we analysed 10 years of wildlife rehabilitation records of squamate (snake and lizard) reptiles (n = 37 075) from the Greater Sydney region, New South Wales, Australia, to explore their value to address management and conservation issues. Rescues were high...
Motivation
Terrestrial predators play key roles in cycling nutrients, as well as limiting prey populations, and shaping the behaviour of their prey. Prehistoric, historic and ongoing declines of the world's predators have reshaped terrestrial ecosystems and are a topic of conservation concern. However, the availability of ecologically relevant pred...
Context
Human disturbance has transformed ecosystems globally, yet studies of the ecological impact of landscape modification are often confounded. Non-random patterns of land clearing cause differing vegetation types and soil productivity between fragments in modified landscapes and reference areas—like national parks—with which they are compared....
Despite being a central aspect of a species' ecology and having important conservation implications, the use of fine‐scale habitat features (microhabitats), and how they vary over time, are poorly known for most species. In this study, we leveraged 522 relocations of radio‐tracked mallee tree dragons ( Amphibolurus norrisi ) and painted dragons ( C...
Ecosystem engineers modify their environment and influence the availability of resources for other organisms. Burrowing species, a subset of allogenic engineers, are gaining recognition as ecological facilitators. Burrows created by these species provide habitat for a diverse array of other organisms. Following disturbances, burrows could also serv...
In our present age of extinction, conservation managers must use limited resources efficiently to conserve species and the genetic diversity within them. To conserve intraspecific variation, we must understand the geographic distribution of the variation and plan management actions that will cost-effectively maximise its retention. Here, we use a g...
Analysis of the spatial and temporal patterns of animal occurrence data can provide insight into the distribution, abundance, and dynamics of populations. Snakes may exhibit seasonal changes in their spatial use of landscapes, and understanding these patterns is crucial for improving management strategies that reduce human–snake conflict. Here, we...
Catastrophic megafires can increase extinction risks; identifying species priorities for management and policy support is critical for preparing and responding to future fires. However, empirical data on population loss and recovery post-fire, especially megafire, are limited and taxonomically biased. These gaps could be bridged if species' morphol...
Context and challenges • Australia harbours a disproportionate share of global squamate diversity (lizards and snakes). The areas impacted by the 2019-20 wildfires comprise diverse squamate communities that include many threatened and narrowly distributed species. • The impact of fire on most Australian squamates is not well understood. Reptile pop...
Urbanisation changes landscapes, often simplifying and homogenising natural ecosystems while introducing novel environments. Although this transformation often adversely impacts native wildlife, generalist species that exhibit broad dietary and habitat requirements can persist and take advantage of urban environments. To understand which life histo...
A land of extremes, the Northern Territory’s arid deserts and monsoonal forests harbour some of Australia’s smallest and the world’s largest reptiles, as well as some of the world’s most venomous snakes. Field Guide to the Reptiles of the Northern Territory is the first regional guide to the crocodiles, turtles, lizards and snakes of this megadiver...
Animal conservation requires a sound understanding of the movement ecology and habitat selection of the species in question. A key component of this is identifying habitats that animals actively seek or avoid. We quantified habitat selection and investigated the drivers of variability in the short-term activity area of a small, endangered mesopreda...
Abstract Mammal declines across northern Australia are one of the major biodiversity loss events occurring globally. There has been no regional assessment of the implications of these species declines for genomic diversity. To address this, we conducted a species‐wide assessment of genomic diversity in the northern quoll (Dasyurus hallucatus), an E...
Context
Increases in fire frequency, intensity and extent are occurring globally. Relative to historical, Indigenous managed conditions, contemporary landscapes are often characterised by younger age classes of vegetation and a much smaller representation of long-unburnt habitat.
Objectives
We argue that, to conserve many threatened vertebrate spe...
Southern Australia’s 2019–20 wildfire season was unprecedented, but the ecological toll remains poorly understood. Estimates of three billion animals being affected by the fires attracted global attention, but how many of those animals succumbed to the flames? A recent systematic review of fire-induced mortality showed that a surprisingly high prop...
Background
‘Megafire’ is an emerging concept commonly used to describe fires that are extreme in terms of size, behaviour, and/or impacts, but the term’s meaning remains ambiguous.
Approach
We sought to resolve ambiguity surrounding the meaning of ‘megafire’ by conducting a structured review of the use and definition of the term in several languag...
Both fire and predators have strong influences on the population dynamics and behaviour of animals, and the effects of predators may either be strengthened or weakened by fire. However, knowledge of how fire drives or mediates predator-prey interactions is fragmented and has not been synthesised. Here, we review and synthesise knowledge of how fire...
Aim
After environmental disasters, species with large population losses may need urgent protection to prevent extinction and support recovery. Following the 2019–2020 Australian megafires, we estimated population losses and recovery in fire‐affected fauna, to inform conservation status assessments and management.
Location
Temperate and subtropical...
Context
Sound taxonomy is the cornerstone of biodiversity conservation. Without a fundamental understanding of species delimitations, as well as their distributions and ecological requirements, our ability to conserve them is drastically impeded. Cryptic species – two or more distinct species currently classified as a single species – present a sig...
Urban ecosystems and remnant habitat 'islands' therein, provide important strongholds for many wildlife species including those of conservation significance. However, the persistence of these habitats can be undermined if their structure and function are too severely disrupted. Urban wetlands, specifically, are usually degraded by a monoculture of...
The 2019–2020 Australian megafires were unprecedented in their intensity and extent. These wildfires may have caused high mortality of adult broad-headed snakes Hoplocephalus bungaroides which shelter inside tree hollows during summer. We evaluated the impacts of two high-intensity wildfires (2002 Touga Fire and 2020 Morton Fire) on a broad-headed...
In response to Australia's current extinction crisis, substantial research efforts have been targeted towards some of the most imperilled species. One such species is the northern quoll (Dasyurus hallucatus), a marsupial predator that has recently suffered substantial declines in range and is now listed as Endangered. We conducted a systematic revi...
Planet Earth is entering the age of megafire, pushing ecosystems to their limits and beyond. While fire causes mortality of animals across vast portions of the globe, scientists are only beginning to consider fire as an evolutionary force in animal ecology. Here, we generate a series of hypotheses regarding animal responses to fire by adopting insi...
Evolutionary transitions from terrestrial to aquatic habitats involve major selective shifts in animal signalling systems. Entirely marine snakes face two challenges during underwater social interactions: (1) finding mates when pheromones are diffused by water currents; and, once a mate is located, (2) maintaining contact and co-ordinating mating w...
Planet Earth is entering the age of megafire, pushing ecosystems to their limits and beyond. While fire causes mortality of animals across vast portions of the globe, scientists are only beginning to consider fire as an evolutionary force in animal ecology. Here, we generate a series of hypotheses regarding animal responses to fire by adopting insi...
Global wildlife trade is a multibillion-dollar industry and a significant driver of vertebrate extinction risk. Yet, few studies have quantified the impact of wild harvesting for the illicit pet trade on populations. Long-lived species, by virtue of their slow life history characteristics, may be unable to sustain even low levels of collecting. Her...
Mitchell’s water monitors (Varanus mitchelli) are a small to medium‐sized (<1 m TL) Australian varanid lizard endemic to northern Western Australia and the Northern Territory, extending just into north‐western Queensland. They are a semi‐aquatic, semi‐arboreal monitor, typically thought of as being associated with freshwater riparian habitats. Foll...
Targeted gene flow is a novel conservation strategy that involves translocating individuals with favourable genes to areas where they will have a conservation benefit. One oft-cited risk of the strategy is the potential for outbreeding depression. Here, we used the northern quoll (Dasyurus hallucatus) as a model to test this possibility for the fir...
Globally, cities and urban areas are expanding rapidly, leading to increased human–wildlife conflict. To reduce human–snake conflict in Australia, ‘snake catchers’ are employed to remove and relocate snakes detected by the public in urban or rural areas. Where records of human–snake interactions are being collected, these data can inform our unders...
Chameleon Dragons Chelosania brunnea Gray, 1845 are well known amongst naturalists of northern Australia as being one of the most cryptic and least frequently observed of Australia’s large, iconic lizards. Despite their broad distribution across the savanna woodlands that dominate northern Australia, very few records exist of this species and, as a...
Global wildlife trade is a multibillion-dollar industry and a significant driver of vertebrate extinction risk. Yet, few studies have quantified the impact of wild harvesting for the illicit pet trade on populations. Long-lived species, by virtue of their slow life history characteristics, may be unable to sustain even low levels of harvesting. Her...
Attempts to reintroduce threatened species from ex situ populations (zoos or predator-free sanctuaries) regularly fail because of predation. When removed from their natural predators, animals may lose their ability to recognize predators and thus fail to adopt appropriate antipredator behaviors. Recently, northern quolls (Dasyurus hallucatus; Dasyu...
Over the last decade, the combination of biological surveys, genetic diversity assessments and systematic research has revealed a growing number of previously unrecognised vertebrate species endemic to the Australian Monsoonal Tropics. Here we describe a new species of saxicoline velvet gecko in the Oedura marmorata complex from Groote Eylandt, a l...
The arrival of novel predators can trigger trophic cascades driven by shifts in prey numbers. Predators also elicit behavioural change in prey populations, via plasticity and rapid evolution, and such behavioural responses by prey may also contribute to trophic cascades. Here we document the effects of a novel predator on the behaviour and demograp...
If bold animals are more likely to be trapped than shy animals, we take a biased sample of personalities—a problem for behavioural research. Such a bias is problematic, also, for population estimation using mark-recapture models that assume homogeneity in detection probabilities. In this study, we investigated whether differences in boldness result...
Invasive species are a leading cause of native biodiversity loss. In Australia, the toxic, invasive cane toad Rhinella marina has caused massive and widespread declines of northern quolls Dasyurus hallucatus. Quolls are fatally poisoned if they mistakenly prey on adult toads. To prevent the extinction of this native dasyurid from the Top End, an in...
Until now there have been two species of burrowing elapid from the genus Brachyurophis known to occur in the Einasleigh Uplands Bioregion of northeastern Queensland, the Australian coral snake (Brachyurophis australis Krefft, 1864) and the north-eastern (or Campbell’s) shovel-nosed snake (Brachyurophis campbelli Kinghorn, 1929). Here we report a th...
The magnitude of impact of an invasive species on native taxa, and the time course of recovery, depend on the native’s ability to adjust to the invader. Here, we examine the impact of a toxic invasive prey species (cane toad Rhinella marina) on a vulnerable top-predator (lace monitor Varanus varius) in southern Australia. Lace monitor populations c...
Commonly, invaders have different impacts in different places. The spread of cane toads (Rhinella marina: Bufonidae) has been devastating for native fauna in tropical Australia, but the toads' impact remains unstudied in temperate-zone Australia. We surveyed habitat characteristics and fauna in campgrounds along the central eastern coast of Austral...