Hervé Jourdan

Hervé Jourdan
Institute of Research for Development | IRD · 237 - Mediterranean Institute of marine and terrestrial Biodiversity (IMBE)

PhD in Tropical ecology, Université Paul Sabatier Toulouse

About

162
Publications
46,247
Reads
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2,780
Citations
Citations since 2017
45 Research Items
1258 Citations
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Introduction
I am based in New Caledonia (SW pacific). I am interested in ecology and biology of invasive species, especially invasive ants. I develop research on biotic interactions in multi-invasives context (cat, rats and ants) and interactions of invasives with threatened species (especially squamates in New Caledonia). I have also a strong interest for biodiversity process and biogeography in Australasia through ant taxonomy and insects distribution.
Additional affiliations
November 2011 - present
Aix-Marseille Université
Position
  • Research Officer
November 2011 - present
January 2005 - present
Institute of Research for Development
Position
  • Researcher

Publications

Publications (162)
Chapter
Full-text available
Because of their importance as pollinators of wild and cultivated plants, little concern has been paid to alien bees when entering a new ecosystem. Hence, approximately 80 alien bee species worldwide have spread outside their native ranges. Here, we explored the main impacts of alien bees on native bees through competition for food or nesting resou...
Article
Full-text available
Crickets (Ensifera, Grylloidea) are not commonly used as ecological indicators in con- trary to other Orthoptera (e.g., grasshoppers and katydids). However, they are sensi- tive to environmental changes and abundant in tropical regions. To evaluate whether crickets are relevant bioindicators of tropical ecosystems, we investigated cricket as- sembl...
Article
Full-text available
The little fire ant, Wasmannia auropunctata , is an invasive species known to negatively affect many native species in its introduced range. Here, we studied the effect of little fire ant presence on the biomass of soil fauna in rainforest of New Caledonia to assess if little fire ants have an impact on an endangered endemic flightless bird, the ka...
Article
Full-text available
The aim of our review was to examine the cases of Tephritidae invasions across island systems in order to determine whether they follow a hierarchical mode of invasion. We reviewed the literature on factors and mechanisms driving invasion sequences in Pacific and Southwest Indian Ocean islands and gathered every record of invasion by a polyphagous...
Book
TAXREF is the taxonomic register for all living organisms from metropolitain and overseas France, marine as well as continental. A new version is published each year. This 15th version can be downloaded here : https://inpn.mnhn.fr/telechargement/referentielEspece/taxref/15.0/menu
Article
Full-text available
Odonata fauna of the islands of Wallis and Futuna has been investigated during a two week field trip in 2020 and occasional observations in 2007­2012. Updated species checklist and faunistic information following nomenclature changes, new taxonomic information and distribution data are proposed. Presently, 15 species are known from Wallis & Futuna....
Article
Full-text available
New Caledonia was, until recently, considered an old continental island harbouring a rich biota with outstanding Gondwanan relicts. However, deep marine sedimentation and tectonic evidence suggest complete submergence of the island during the latest Cretaceous to the Paleocene. Molecular phylogenies provide evidence for some deeply-diverging clades...
Preprint
Full-text available
New Caledonia was, until recently, considered an old continental island harbouring a rich biota with outstanding Gondwanan relicts. However, deep marine sedimentation and tectonic evidence suggest complete submergence of the island during the latest Cretaceous to Paleocene. Molecular phylogenies provide evidence for some deeply-diverging clades tha...
Poster
Full-text available
This poster highlights a brief collection of the spiders' diversity that could be found in New Caledonia.
Article
Full-text available
Land-use changes through urbanization and biological invasions both threaten plant-pollinator networks. Urban areas host modified bee communities and are characterized by high proportions of exotic plants. Exotic species, either animals or plants, may compete with native species and disrupt plant-pollinator interactions. These threats are heightene...
Article
The OCBIL theory comprises a set of hypotheses to comprehend the biota of old, climatically buffered, infertile landscapes (OCBILs). Here, we review evidence from the literature to evaluate the extent to which this theory could apply to the biodiversity hotspot of New Caledonia. We present geological, pedological and climatic evidence suggesting ho...
Conference Paper
Full-text available
Les changements d'usage des sols, tels que l'urbanisation, ainsi que les introductions biologiques sont parmi les causes majeures du déclin des pollinisateurs à l'échelle globale. Néanmoins, le milieu urbain, par son hétérogénéité d'habitats et son importante diversité floristique, permet le maintien d'un certain nombre d'espèces d'abeilles. Cepend...
Poster
Full-text available
From far being exhaustive, this poster presents a selection of 30 portraits, representative of the extreme diversity of forms and lifestyles, including some emblematic species such as a tarantula, a black widow or a spiny orb weaver, and others that are much less known but are of equal interest to nature enthusiasts.
Article
Full-text available
Thirty-three species of aphids are now established in New Caledonia. All species appear to have been introduced accidentally by human activity in the last century. Here, 17 aphid species are recorded for the first time: Aphis eugeniae , Aphis glycines , Aphis odinae , Aulacorthum solani , Brachycaudus helichrysi , Cerataphis orchidearum , Greenidea...
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
Full-text available
Compared to other archipelagos of the Pacific, the New Caledonian Odonata fauna is rich and diverse with 56 valid species or subspecies (23 endemics, 41%) from eight families (four Zygoptera: Argiolestidae, Coenagrionidae, Isostictidae, Lestidae, and four Anisoptera: Aeshnidae, Corduliidae, Synthemistidae, Libellulidae) and 31 genera (including fou...
Article
Compared to other archipelagos of the Pacific, the New Caledonian Odonata fauna is rich and diverse with 56 valid species or subspecies (23 endemics, 41%) from eight families (four Zygoptera: Argiolestidae, Coenagrionidae, Isostictidae, Lestidae, and four Anisoptera: Aeshnidae, Corduliidae, Synthemistidae, Libellulidae) and 31 genera (including fou...
Article
Full-text available
Invasive alien species are a major threat to native insular species. Eradicating invasive mammals from islands is a feasible and proven approach to prevent biodiversity loss. We developed a conceptual framework to identify globally important islands for invasive mammal eradications to prevent imminent extinctions of highly threatened species using...
Data
Table of islands, country or territory of ownership, invasive mammals and highly threatened species occurring on island, island rank reflecting conservation value, and timeframe assessed by socio-political survey in which an eradication could feasibly be initiated. Invasive mammal species listed are only those identified as having negative impact o...
Data
Table of islands where no socio-political feasibility data was available during this study, country or territory of ownership, invasive mammals and highly threatened species occurring on island. Invasive mammal species listed are only those identified as having negative impact on highly threatened species and fall below island area and human popula...
Data
Additional figures, tables and text supporting the main paper. (DOCX)
Conference Paper
Full-text available
New Caledonia is a tropical archipelago of the South Pacific Ocean, and is one of the 36 world biodiversity hotspots. However, its unique biodiversity is increasingly threatened by habitat fragmentation and introductions of invasive alien species. Among these invaders, the red-vented bulbul (Pycnonotus cafer) is currently expanding towards the nort...
Article
A new genus and species of skink, Kuniesaurus albiauris, is here described from the Île des Pins off southern New Caledonia. This new taxon possesses a unique suite of morphological apomorphies (scalation) that does not allow it to be placed in any existing Australasian eugongylid genus. It is known only from a single area in dense coastal forest o...
Article
A new species of skink in the genus Epibator is described from Île Walpole, a small, isolated, raised vegetated limestone platform, ∼200km ESE of southern New Caledonia. The new species is distinguished from its congeners Epibator nigrofasciolatus and E. greeri primarily by its coloration and pattern (both species), differences in scalation (greeri...
Book
Full-text available
Biodiversity of the South of New Caledonia
Book
TAXREF is the taxonomic register for all living organisms from metropolitain and overseas France, marine as well as continental. A new version is published each year. This 12th version can be downloaded here : https://inpn.mnhn.fr/telechargement/referentielEspece/taxref/12.0/menu
Article
Full-text available
The 11 French Overseas tropical island territories, located in three oceans (Atlantic, Indian and Pacific), harbored a high species and habitat diversity on small terrestrial areas. Indeed, these islands comprise 70% of the 17,947 endemic plant and animal species known in France on an area of only 4 % of the French nation. This “mega-biological” di...
Article
Full-text available
Invasive species are a major concern for the maintenance of ecosystem services and biodiversity but are difficult to mitigate. Upstream solutions to prevent their impact, including their detection, are needed. Wasmannia auropunctata, an invasive ant living in vagile supercolonies, is especially hard to track and is a major threat for tropical ecosy...
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
Full-text available
For a long time, New Caledonia was considered a continental island, a fragment of Gondwana harbouring old clades that originated by vicariance and so were thought to be locally ancient. Recent molecular phylogenetic studies dating diversification and geological data indicating important events of submergence during the Paleocene and Eocene (until 3...
Article
Full-text available
Seabirds concentrate nutrients from large marine areas on their nesting islands playing an important ecological role in nutrient transfer between marine and terrestrial ecosystems. Here we investigate the role of guano on corals reefs across scales by analyzing the stable nitrogen isotopic (δ15N) values of the scleractinian coral Pocillopora damico...
Article
In the Figure 10 where the Gryllinae (Gryllidae) genera present in New Caledonia are illustrated, the letters of the two species of the genus Lepidogryllus Otte & Alexander, 1983 have been inverted, while they are correctly indicated in the legend and in the text of the paper. The figure is published here with the correct letters: Figure 10C shows...
Article
Full-text available
Squamata are one of the most threatened groups among island vertebrates, facing high pressure from exotic species. However, the contribution of small terrestrial reptiles in invasive rodents’ diet remains poorly investigated, partly because of the lack of tools for accurately identifying chewed prey fragments in gut contents. The New Caledonia arch...
Article
Full-text available
Crickets (Insecta, Orthoptera, Gryllidea) are amongst the most abundant and diverse insects in New Caledonia: 40 genera are recorded today from the Archipelago and 180 cricket species have been reported; 19 genera and more than 90% of the species are endemic. Owing to this diversity, crickets prove an interesting model to test evolutionary hypothes...
Conference Paper
New Caledonia is the oldest oceanic island in the world. The biogeographic studies on the origin of the island biota recently shifted from an “all-Gondwanan” paradigm toward a more balanced view, taking into account the submergence tectonic events that occurred in Paleocene and Eocene. Many molecular regional studies have now been conducted and the...
Article
Full-text available
We provide an up-to-date catalogue of the Coccomorpha Rübsaamen, 1899 of New Caledonia based on studies of collected and curated specimens and on the literature. One hundred and eighteen species (118) in ten families have been recorded to date, in 70 genera. Five of the genera (7.2%) are endemic, belonging † left us unexpectedly on 13th December 20...
Article
The new genus Murmurillana Delorme gen. nov., is described within the tribe Cicadettini Buckton, 1889, designating Murmurillana inaudibilis Delorme sp. nov., as the type species. Murmurillana inaudibilis Delorme sp. nov. and Murmurillana paenetacita Delorme sp. nov. are described from New Caledonia. They are respectively found in mid altitude dense...
Article
Full-text available
Intensive sampling of cricket communities has been undertaken in southern New Caledonia in selected plots of vegetation, i.e. rain forest, preforest and maquis shrubland. This leads to the discovery of many new taxa, which are described in the present paper, together with closely related species from nearby areas. Descriptions are based on general...
Article
Full-text available
Few studies have focused on the early colonization of New Caledonia by insects, after the re-emergence of the main island, 37 Myr ago. Here we investigate the mode and tempo of evolution of a new endemic cricket genus, Pixibinthus, recently discovered in southern New Caledonia. First we formally describe this new monotypic genus found exclusively i...
Article
Among New Caledonian cicada taxa, the endemic genus Kanakia Distant, 1892 appears as the most spectacular one, especially because of the large size of its species (length up to 50 mm for males). Recent new specimen collections helped to clarify the taxonomy of this spectacular genus. According to morphological characteristics, we were able to redef...
Article
Full-text available
The impact of alien predator species on insular native biota has often been attributed to island prey naïveté (i.e. lack of, or inefficient, anti-predator behavior). Only rarely, however, has the concept of island prey naïveté been tested, and then only a posteriori (i.e. hundreds or thousands of years after alien species introduction). The presenc...
Article
Among invasive species, ants are a particularly prominent group with enormous impacts on native biodiversity and ecosystem functioning. Globalization and ongoing climate change are likely to increase the rate of ant invasions in the future, leading to simultaneous introductions of several highly invasive species within the same area. Here, we inves...
Article
Full-text available
We report the recent arrival and subsequent spread of the Sida Leafbeetle, Calligrapha pantherina Stål, 1859, in the archipelago of New Caledonia. The species seems to have a rapid spread as it is now recorded all along the west coast and also have spread to the Loyalty Islands. The first specimen was caught in November 2012. This is a biocontrol a...
Article
Full-text available
We present an updated checklist of the ladybird beetle fauna of New Caledonia. Fifty species have been tracked from literature and collections, but six should be removed from the list as they represent false records, invalid or unestablished species: Coccinella boletifera Fauvel, Harmonia conformis (Boisduval), Menochilus duodecimpunctatus (Fauvel)...
Article
Full-text available
Seabirds are particularly vulnerable to introduced alien mammalian predators, especially invasive rats, which are the main contributors to seabird extinction and endangerment in many places worldwide. However, this appears context-dependent because, paradoxically, cases of apparent long-term coexistence between rats and some species of seabird have...
Article
Full-text available
Biological invasions are recognized as one of the major threats to island biodiversity conservation, and numerous studies have been conducted around the world to restore the biodiversity of islands submitted to invasive species impacts. However, few scientific post-eradication studies were piloted notably for the biodiversity assessment of Arthropo...
Article
Full-text available
Poviliana dayubiikii Delorme sp. nov. and Poviliana montrouzieri Delorme sp. nov. are described from New Caledonia. They are respectively found in mid altitude rain forest on Mont Panié (570 m) and Col des Roussettes (300 m). Male calling songs of the two new species are described from the field recordings. A key to the species of Poviliana is also...
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
Ants are among the most problematic invasive species. They displace numerous native species, alter ecosystem processes, and can have negative impacts on agriculture and human health. In part, their success might stem from a departure from the discovery–dominance trade-off that can promote coexistence in native ant communities, that is, invasive ant...
Research
Full-text available
The "strategic analysis" has been conducted in 2012-2014 as part of the process of creation of the Coral Sea nature park, an MPA located in New Caledonia. This document aims at giving a synthesis of the available knowledge and identifying key conservation and socio-economic issues that will be adressed by the Park's management plan in the future. A...
Article
Seabirds are particularly vulnerable to introduced alien mammalian predators, especially invasive rats, which are the main contributors to seabird extinction and endangerment in many places worldwide. However, this appears context-dependent because, paradoxically, cases of apparent long-term coexistence between rats and some species of seabird have...
Article
Full-text available
The rarely collected gasteruptiid wasp fauna (Evanioidea: Gasteruptiidae) of New Caledonia is reviewed. Previously only two species of Pseudofoenus (Hyptiogastrinae) were known. Here, we record the subfamily Gasteruptiinae from New Caledonia for the first time and describe three new species of Gasteruption: G. lacoulee Jennings, Krogmann & Parslow,...
Article
Ants figure prominently among the worst invasive species because of their enormous ecological and economic impacts. However, it remains to be investigated which species would be behaviourally dominant when confronted with another invasive ant species, should two species be introduced in the same area. In the future, many regions might have suitable...