Elsa Bonnaud

Elsa Bonnaud
Université Paris-Sud 11 | Paris 11 · Laboratoire d'Ecologie, Systématique et Evolution

PhD

About

70
Publications
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2,318
Citations

Publications

Publications (70)
Article
Full-text available
The domestic cat (Felis catus) is one of the most abundant predators and a serious threat to many wildlife species. While a large body of literature explores the number and diversity of individuals depredated by pet cats, the drivers of predation have been investigated much less. Although the environment of the cat, the owner behavior, and the intr...
Article
Full-text available
The rate of biological invasions is growing unprecedentedly, threatening ecological and socioeconomic systems worldwide. Quantitative understandings of invasion temporal trajectories are essential to discern current and future economic impacts of invaders, and then to inform future management strategies. Here, we examine the temporal trends of cumu...
Preprint
Full-text available
The rate of biological invasions is growing unprecedentedly, threatening ecological and socioeconomic systems worldwide. Quantitative understandings of invasion temporal trajectories are essential to discern current and future economic impacts of invaders, and then to inform future management strategies. Here, we examine the temporal trends of cumu...
Article
Full-text available
As a critical stage in the life cycle of ant colonies, nest establishment depends on external and internal factors. This study investigates the effect of the number of queens on queen and worker behavior during nest establishment in invasive Argentine ants (Linepitema humile) and native Mediterranean Tapinoma nigerrimum. We set up experimental colo...
Article
Full-text available
Invasive feral cats threaten biodiversity at a global scale. Mitigating feral cat impacts and reducing their populations has therefore become a global conservation priority, especially on islands housing high endemic biodiversity. The New Caledonian archipelago is a biodiversity hotspot showing outstanding terrestrial species richness and endemism....
Article
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Among medium-sized carnivores, red foxes (Vulpes vulpes) and domestic cats (Felis silvestris catus) are the most abundant species in human-dominated landscapes worldwide. Both are known to be generalist predators that exploit a wide range of prey groups (e.g., mammals, birds, and invertebrates). Identifying red fox and domestic cat predation pressu...
Article
Full-text available
This special issue points to the necessity to continue actively working on biological invasions, as invasive species remain a main and global threat for biodiversity through a global homogenization process. This issue includes six research papers, covering a large range of taxa, studying new invasive processes and proposing innovative management so...
Article
Full-text available
The kagu (Rhynochetos jubatus) is an iconic endemic flightless bird from New Caledonia, red-listed as endangered according to the International Union for Conservation of Nature (IUCN) criteria. Feral cats are among the most successful and damaging invaders for island biodiversity. They have been directly responsible for the extinction of numerous b...
Article
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The introduction of mammals on oceanic islands currently threatens or has caused the extinction of many endemic species. Cats and rats represent the major threat for 40 % of currently endangered island bird species. Direct (predation) and/or indirect (exploitative competition for food resource) trophic interactions are key mechanisms by which invad...
Article
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Shearwaters and petrels (hereafter petrels) are highly adapted seabirds that occur across all the world’s oceans. Petrels are a threatened seabird group comprising 124 species. They have bet-hedging life histories typified by extended chick rearing periods, low fecundity, high adult survival, strong philopatry, monogamy and long-term mate fidelity...
Article
Foxes and cats are the most abundant medium-sized urban carnivores. To date, however, there has been a lack of effort to synthesize data on the spatial and trophic resources used by these two carnivores, despite the importance of this information for assessing their similarity and roles in urban food webs. In this paper, we first synthesize all ava...
Article
Improving species community diversity studies needs population abundances to be calculated. Micromammal population densities are highly variable at small spatial scales. Mark-recapture methods based on grid trapping is the most reliable technique to study density in small rodents, albeit it is time-consuming because it necessitates increasing the n...
Article
Feral cats (Felis catus) are one of the most successful and harmful invasive predator species, leading to dramatic loss of biodiversity across the globe. Our study assessed feral cat predation in a major biodiversity hotspot: the New Caledonian archipelago. We focused on the consequences of this predation for the outstanding endemic fauna found thr...
Poster
Full-text available
Among invasive species, feral cats are one of the most successful and harmful predator species leading to dramatic loss of biodiversity the world’s islands. Effective feral cat management (eradications, controls) on numerous islands resulted generally in positive effects for native biodiversity conservation. The lack of feral cat diet study in the...
Article
Seabirds are among the most threatened groups of birds, and predation by invasive mammals is one of the most acute threats at their island breeding stations. Island restoration projects increasingly involve the eradication of invasive non-native mammals, with benefits for seabirds and other island fauna. To date, demonstrated benefits of invasive m...
Article
Biological invasions have been unambiguously shown to be one of the major global causes of biodiversity loss. Despite the magnitude of this threat and recent scientific advances, this field remains a regular target of criticism - from outright deniers of the threat to scientists questioning the utility of the discipline. This unique situation, comb...
Article
Removal of feral cats from island environments is a useful mechanism by which their ecological impact on endangered species can be reduced or ended. Nevertheless, because cats are anthropogenic in their origins, social perceptions of management practices play a large role in their implementation. Four-hundred questionnaires were delivered (386 were...
Article
Full-text available
More than US$21 billion is spent annually on biodiversity conservation. Despite their importance for preventing or slowing extinctions and preserving biodiversity, conservation interventions are rarely assessed systematically for their global impact. Islands house a disproportionately higher amount of biodiversity compared with mainlands, much of w...
Article
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We support the call of Wallach et al. (2015a) for a compassionate approach to conservation, and agree that any lethal control must be justified by a high probability of conservation gains and supported by relevant stakeholders. We believe that lethal control of invasive predators is justified when it will reverse the negative impacts of predators i...
Article
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Cats are considered one of the most harmful invasive predators of island native species, particularly adult shearwaters, which are highly vulnerable to predation. Populations of Yelkouan shearwater, an endemic species of the Mediterranean basin with only a few large breeding colonies, are predicted to decline in response to feral or free-roaming ca...
Article
Full-text available
Domestic cats are one of the most widespread predators on islands worldwide and are responsible for numerous reductions and extinctions of species on islands. The three main islands of the Hyères Archipelago house one of the largest colonies of the Mediterranean endemic Yelkouan shearwater Puffinus yelkouan that has recently been up-listed by the I...
Conference Paper
Full-text available
Biological invasions represent one of the main threats to biodiversity, especially on islands where invasive are the first cause of biodiversity loss. Alien mammalian predators have been responsible for numerous island species extinctions worldwide, and feral cats are among the most successful and damaging invaders due to their generalist predatory...
Article
Full-text available
Vertebrates often mediate seed dispersal systems, essential for the maintenance of biodiversity. Some of these acquire a complex multistep process in island environments, where for example a native predatory bird can predate upon a frugivorous vertebrate, dispersing seeds secondarily. These complex mutualistic processes are really threatened by bio...
Article
Full-text available
On islands, invasive predators, particularly feral cats and rats, are key drivers of bird population decline and extinction. Diet studies can be used to assess predator impacts on prey populations. Here we first evaluated the resolution of morphological identification (Class to Species) of bird remains in cat and rat diet studies. We also analysed...
Poster
Full-text available
Restauration écologique de l’ile de Bagaud
Poster
Full-text available
Étapes et résultats des opérations de restauration écologique de l’ile de Bagaud vis à vis des Carpobrotus et des rats noirs
Conference Paper
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Invasive mammalian predators, in particular feral cat Felis silvestris catus, have largely contributed to species endangerment and extinction on islands worldwide. Control or eradication of invasive predators represent an efficient conservation tool to restore native biodiversity. Cat diet was largely studied to assess cat predation pressure and t...
Conference Paper
Full-text available
Alien mammal predators, in particular house cat Felis silvestris catus, have largely contributed to species endangerment and extinction on island worldwide. Generalist predatory behaviors of cats have facilitated the establishment of feral and invasive populations that have strongly threatened native wildlife. Although cat diet was well studied, ye...
Article
Full-text available
The domestic cat has been introduced on most islands worldwide, where it has established feral populations and is currently known to be one of the worst invasive mammalian predators. Predation is the strongest deleterious effect of cats on wildlife, inducing a direct negative impact on population size and dynamics, breeding success and changes in s...
Article
Full-text available
A great part of the Earth's biodiversity occurs on islands, to which humans have brought a legion of invasive species that have caused population declines and even extinctions. The domestic cat is one of the most damaging species introduced to islands, being a primary extinction driver for at least 33 insular endemic vertebrates. Here, we examine t...
Conference Paper
Biological invasions still represent one of the main threats to biodiversity, and thus strongly participate to accelerate the biodiversity crisis worldwide. The domestic cat is one of the most spread species by humans on island ecosystems. Then, cats return into the wild, feeding only from the natural environment, settling feral populations and bec...
Article
Full-text available
Many fleshy-fruited plants from the Mediterranean and Macaronesian islands are dispersed through endozoochory. In mainland Mediterranean areas, reciprocal adaptations have been found between plants and animals, although evidence is scarce. On small isolated oceanic islands, such reciprocal adaptations might well be more prevalent due to intrinsic i...
Article
Full-text available
Biological invasions are among the greatest threats to global biodiversity, but in contrast to most other global threats, they suffer from specific communication issues. Our paper presents the first new addition to the widely cited IUCN list of ''100 of the world's worst invasive species'', a list created a decade ago in response to these communica...
Article
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The West African giraffe is a genetically unique population represented only by the subspecies Giraffa camelopardalis peralta, categorized as Endangered on the IUCN Red List. These giraffes live outside protected areas, without natural predators and share their habitat with local people and their livestock. This study provides demographic data on t...
Article
Feral cats are considered to be one of the main harmful invasive species for island species. Adult shearwaters are highly vulnerable to predation by cats. The population of the Yelkouan Shearwater Puffinus yelkouan, a species endemic to the Mediterranean, is predicted to decline, leaving only a few large breeding colonies, due to the invasion of ca...
Article
Full-text available
Cats are generalist predators that have been widely introduced to the world's ~179 000 islands. Once introduced to islands, cats prey on a variety of native species many of which lack evolved defenses against mammalian predators and can suffer severe population declines and even extinction. As islands house a disproportionate share of terrestrial b...
Article
Rabbits are considered by biologists to be among the worst invasive species. Their impact on invaded ecosystems, epito-mized in Australia and on islands worldwide (e.g. North, Bullock & Dulloo, 1994; Williams et al., 1995; Burbidge & Moris, 2001; Garzon-Machado et al., 2010), has earned them a well-deserved place in the infamous Invasive Species Sp...
Article
Full-text available
Cats are among the most successful and damaging invaders on islands and a significant driver of extinction and endangerment. Better understanding of their ecology can improve effective management actions such as eradication. We reviewed 72 studies of insular feral cat diet from 40 islands worldwide. Cats fed on a wide range of species from large bi...
Conference Paper
Full-text available
There is growing evidence that rodent eradication often enables the substantial recovery of native species. However, most previous studies have focused on the recovery of conspicuous and charismatic species directly affected by rodents. We examined the responses of the terrestrial ecosystem of Surprise Island, New Caledonia to the eradication of in...
Conference Paper
Full-text available
The growing number of biological invasions worldwide is now being accompanied by burgeoning successful alien species eradications on islands of increasing size, topography and habitat complexity. However, the extent of these achievements depends on the definition of success. In most cases, success or failure are measured in terms of the absence or...
Article
Introduced predators on islands are responsible for numerous native species extirpations and extinctions. Predation by cats is particularly detrimental to seabirds and cat control or eradication is generally the best option to reduce their negative impacts on native fauna. However, potential cascading effects, such as mesopredator release effect, n...
Article
Full-text available
The Yelkouan shearwater, Puffinus yelkouan, is an endangered Mediterranean endemic species of burrowing petrel threatened by feral cats. The life-history parameters of a small population of Yelkouan shearwaters on the Mediterranean island, Port-Cros, were studied in conjunction with the diet of feral cats, to examine the birds’ vulnerability to int...
Article
Non-invasive diet studies, which are a simple but important tool to understand trophic interactions inside ecosystems, need to be as detailed as possible. Determining the precise biomass of ingested prey is a key to obtaining not only a better understanding of the amount of food really ingested but also the predator-prey interactions. It is particu...
Article
Full-text available
Domestic cats (Felis catus) have been introduced on many islands in the world and are responsible for much damage to native insular faunas. The worldwide success and spread of this opportunistic predator is generally associated with its trophic adaptability. We examined the diet of a long-established feral cat population on a small Mediterranean is...