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<p>See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144110#pone.0144110.t001" target="_blank">Table 1</a> and <a... more
<p>See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144110#pone.0144110.t001" target="_blank">Table 1</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144110#sec002" target="_blank">methods</a> for details about data sets.</p
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The Neotropical understory plant Tachia guianensis (Gentianaceae)-known to shelter the colonies of several ant species in its hollow trunks and branches-does not provide them with food rewards (e.g., extrafloral nectar). We tested whether... more
The Neotropical understory plant Tachia guianensis (Gentianaceae)-known to shelter the colonies of several ant species in its hollow trunks and branches-does not provide them with food rewards (e.g., extrafloral nectar). We tested whether these ants are opportunistic nesters or whether mutualistic relationships exist as for myrmecophytes or plants sheltering ant colonies in specialized hollow structures in exchange for protection from enemies and/or nutrient provisioning (myrmecotrophy). We noted 37 ant species sheltering inside T. guianensis internodes, three of them accounting for 43.5% of the cases. They protect their host plants from leaf-cutting ant defoliation and termite damage because individuals devoid of associated ants suffered significantly more attacks. Using the stable isotope 15N, we experimentally showed that the tested ant species furnish their host plants with nutrients. Therefore, a mutualism exists. However, because it is associated with numerous ant species, T. guianensis can be considered a nonspecialized myrmecophyte.
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Research Interests: Biology, Agroforestry, Ecology, Biodiversity, Biological Sciences, and 14 moreFunctional Traits, Environmental Sciences, Ecological Indicators, Rainforest, Litter, Species Richness, Acacia, CHEMICAL SCIENCES, Bioindicator, HUman Disturbance, FOREST SPECIES, Amazonian, Arboreal Locomotion, and Ant diversity
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<p>ANOVAs comparing mean abundance per habitat within guilds are all significant with at least p<0.01. For each guild, different letters denote significantly different means (Tukey tests, p<0.05).</p
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<p>(a) Major data sets (estimated species richness with ten protocols, observed species richness with ten protocols, estimated species richness with FITs, observed species richness with FITs, 885 common and rare species, inset:... more
<p>(a) Major data sets (estimated species richness with ten protocols, observed species richness with ten protocols, estimated species richness with FITs, observed species richness with FITs, 885 common and rare species, inset: flowering trees (note the different scale). (b) Arthropod guilds (observed species richness with ten protocols). Species richness is partitioned among alpha (black bars), betaT (grey bars), betaH (stippled bars) and betaV (white bars). * indicates that parameters are significantly different from zero. Randomization tests were not performed with estimated species richness.</p
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Research Interests: Zoology, Biology, Hymenoptera, Predation, Ant, and 3 moreVenom, Intraspecific Competition, and MALDI-TOF MS
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info:eu-repo/semantics/publishe
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ABSTRACT
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Assessing Creepy Crawlies Arthropods are the most diverse group of terrestrial animal species, yet estimates of the total number of arthropod species have varied widely, especially for tropical forests. Basset et al. (p. 1481 , see the... more
Assessing Creepy Crawlies Arthropods are the most diverse group of terrestrial animal species, yet estimates of the total number of arthropod species have varied widely, especially for tropical forests. Basset et al. (p. 1481 , see the cover) now provide more reliable estimates of total arthropod species richness in a tropical rainforest in Panama. Intensive sampling of a half hectare of forest yielded just over 6000 arthropod species. Scaling up this result to the whole forest suggests that the total species diversity lies between 17,000 and 40,000 species.
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Ants have a great potential in international environmental projects because of their omnipresence in most terrestrial ecosystems, their sensitivity to environmental changes and their relative use of collection all year round. The... more
Ants have a great potential in international environmental projects because of their omnipresence in most terrestrial ecosystems, their sensitivity to environmental changes and their relative use of collection all year round. The standardized ALL protocol for sampling ...
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info:eu-repo/semantics/nonPublishe
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This dataset contains site-level summaries of more than 1.6 million samples from 78 countries representing over 28,000 species, collated from existing spatial comparisons of local-scale biodiversity exposed to different intensities and... more
This dataset contains site-level summaries of more than 1.6 million samples from 78 countries representing over 28,000 species, collated from existing spatial comparisons of local-scale biodiversity exposed to different intensities and types of anthropogenic pressures, from terrestrial sites around the world. The underlying database is being assembled as part of the [PREDICTS project](http://www.predicts.org.uk) - Projecting Responses of Ecological Diversity In Changing Terrestrial Systems. A complete description of the data is given in [http://dx.doi.org/10.1002/ece3.1303](http://dx.doi.org/10.1002/ece3.1303).
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A dataset of 3,250,404 measurements, collated from 26,114 sampling locations in 94 countries and representing 47,044 species. The data were collated from 480 existing spatial comparisons of local-scale biodiversity exposed to different... more
A dataset of 3,250,404 measurements, collated from 26,114 sampling locations in 94 countries and representing 47,044 species. The data were collated from 480 existing spatial comparisons of local-scale biodiversity exposed to different intensities and types of anthropogenic pressures, from terrestrial sites around the world. The database was assembled as part of the PREDICTS project - Projecting Responses of Ecological Diversity In Changing Terrestrial Systems; [www.predicts.org.uk](http://www.predicts.org.uk).\r\n\r\nThe taxonomic identifications provided in the original data sets are those determined at the time of the original research, and so will not reflect subsequent taxonomic changes.\r\n\r\nThis dataset is described in [10.1002/ece3.2579](http://dx.doi.org/10.1002/ece3.2579). A description of the way that this dataset was assembled is given in [10.1002/ece3.1303](http://dx.doi.org/10.1002/ece3.1303).\r\n\r\n* `columns.csv`: Description of data extract columns\r\n* `database...
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Research Interests: Zoology and Sociobiology
One of the most advanced ant–plant mutualisms is represented by myrmecophytes sheltering colonies of some plant-ant species in hollow structures called domatia. In turn, the myrmecophytes benefit from biotic protection and sometimes... more
One of the most advanced ant–plant mutualisms is represented by myrmecophytes sheltering colonies of some plant-ant species in hollow structures called domatia. In turn, the myrmecophytes benefit from biotic protection and sometimes nutrient provisioning (myrmecotrophy). Furthermore, over the course of evolution, some ant species have become social parasites of others. In this general context, we studied the relationship between its host trees and Azteca andreae (Dolichoderinae), a temporary social parasite of the plant-ant Azteca ovaticeps, and, as such, obligatorily associated with myrmecophytic Cecropia obtusa trees (Urticaceae). A first experiment showed that the δ15N values of the young leaves of Cecropia sheltering a mature A. andreae colony were very similar to those for trees sheltering Azteca alfari or A. ovaticeps, two typical Cecropia mutualists for which myrmecotrophy is known. In a second experiment, by injecting a 15N-labelled glycine solution into locusts given as pre...
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Research Interests: Zoology and Sociobiology
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The impact of climate change is intensifying in Amazonia through, among other causes, the higher frequency of both severe droughts and floods due to El Niño and La Niña events as well as an Atlantic influence. Over a 25-year period... more
The impact of climate change is intensifying in Amazonia through, among other causes, the higher frequency of both severe droughts and floods due to El Niño and La Niña events as well as an Atlantic influence. Over a 25-year period (1997–2021) we examined in French Guiana the impact of different climatic parameters on the most frequent social wasp, Polybia bistriata (Polistinae). As it commonly nests on Clusia grandiflora (Clusiaceae), its nests are easily found. Heavy rainfall, particularly during the 1999–2000 La Niña episode, negatively affected this social wasp species as the percentage of Clusia sheltering an active P. bistriata nest decreased from ≈ 40% during the pre-2000 period to zero in 2021. We conclude that extreme wet seasons related to climate change translated into the decline of this species and likely were detrimental to many other polistine wasps of north-eastern Amazonia.
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ABSTRACT A study was conducted to determine the distribution of ants in the crowns of oil palms on 2 plantations (Mpundu and Mondoni) in southwest Cameroon (a total of 615 oil palms). Six dominant species [Crematogaster gabonensis... more
ABSTRACT A study was conducted to determine the distribution of ants in the crowns of oil palms on 2 plantations (Mpundu and Mondoni) in southwest Cameroon (a total of 615 oil palms). Six dominant species [Crematogaster gabonensis (Emery), Tetramorium aculeatum (Mayr), Oecophylla longinoda (Latreille), Monomorium sp., Pheidole megacephala (F.), and Paratrechina sp. ] were distributed in a mosaic pattern. C.gabonensis was the most frequent ant species in Mpundu (86%of the oil palms), whereas in Mondoni it was in competition with T. aculeatum (45.8%of the oil palms of the 6 parcels of land) and was recorded at a lower rate (51.1 %). On 3 parcels in Mondoni, T. aculeatum was the most frequent; whereas on 2 others, C. gabonensis was the most frequent, and in the last parcel these 2 species were evenly distributed. Therefore, oil palm plantations shelter dominant ant mosaics as do plantations of other trees of economic interest and tropical forests. The percentages of oil palms occupied by one or the other of the 2 most frequent dominant ants recorded in 12 parcels were compared with the rate of attack by Coelaemenodera minuta Uhmann. Low rates of attack by the hispine beetle were recorded for parcels where the percentages of oil palms occupied by C. gabonensis were high; the opposite was true for parcels where the percentages of oil palms occupied by T. aculeatum were high.
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We provide here a checklist of the ants of French Guiana, an overseas department of France situated in northern South America, with a very low human population density and predominantly covered by old-growth tropical rainforests. Based on... more
We provide here a checklist of the ants of French Guiana, an overseas department of France situated in northern South America, with a very low human population density and predominantly covered by old-growth tropical rainforests. Based on 165 scientific papers, specimens deposited in collections, and unpublished surveys, a total of 659 valid species and subspecies from 84 genera and 12 subfamilies is presented. Although far from complete, these numbers represent approximately 10% of the ant diversity known to occur in the Neotropical realm. Additionally, three ant genera and 119 species are reported for the first time for French Guiana. Finally, five species are recognized as erroneous records for the the department in the literature. This checklist significantly expands the basic knowledge of the ants in the Guiana Shield, one of the world’s most important biodiversity hotspots.
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Research Interests: Biochemistry, Evolutionary Biology, Entomology, Animal Science, Biotechnology, and 15 moreBiology, Ecology, Evolution, Biological Sciences, Enzymes, Ants, Animal venoms and toxins, Animals, Chemistry and Biochemistry, Alkaloids, Arthropods, Biochemistry and Biotechnology, Fire Ants, Ant Venom, and Biochemistry and cell biology
Research Interests: Understory and Herbivore
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Biodiversity continues to decline in the face of increasing anthropogenic pressures such as habitat destruction, exploitation, pollution and introduction of alien species. Existing global databases of…