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Friedman NR, Lecroq Bennet B, Fischer G, Sarnat EM, Huang J, Knowles LLK, Economo EP. Macroevolutionary integration of phenotypes within and across ant worker castes. Ecol Evol 2020; 10:9371-9383. [PMID: 32953067 PMCID: PMC7487254 DOI: 10.1002/ece3.6623] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 06/27/2020] [Accepted: 06/29/2020] [Indexed: 11/11/2022] Open
Abstract
Phenotypic traits are often integrated into evolutionary modules: sets of organismal parts that evolve together. In social insect colonies, the concepts of integration and modularity apply to sets of traits both within and among functionally and phenotypically differentiated castes. On macroevolutionary timescales, patterns of integration and modularity within and across castes can be clues to the selective and ecological factors shaping their evolution and diversification. We develop a set of hypotheses describing contrasting patterns of worker integration and apply this framework in a broad (246 species) comparative analysis of major and minor worker evolution in the hyperdiverse ant genus Pheidole. Using geometric morphometrics in a phylogenetic framework, we inferred fast and tightly integrated evolution of mesosoma shape between major and minor workers, but slower and more independent evolution of head shape between the two worker castes. Thus, Pheidole workers are evolving as a mixture of intracaste and intercaste integration and rate heterogeneity. The decoupling of homologous traits across worker castes may represent an important process facilitating the rise of social complexity.
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Affiliation(s)
- Nicholas R. Friedman
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate UniversityOkinawaJapan
| | - Beatrice Lecroq Bennet
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate UniversityOkinawaJapan
| | - Georg Fischer
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate UniversityOkinawaJapan
| | - Eli M. Sarnat
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate UniversityOkinawaJapan
| | - Jen‐Pan Huang
- Department of Ecology and Evolutionary Biology, Museum of ZoologyUniversity of MichiganAnn ArborMIUSA
- Biodiversity Research CenterAcademia SinicaTaipeiTaiwan
| | - L. Lacey Knowles Knowles
- Department of Ecology and Evolutionary Biology, Museum of ZoologyUniversity of MichiganAnn ArborMIUSA
| | - Evan P. Economo
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate UniversityOkinawaJapan
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2
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Liu C, Sarnat EM, Friedman NR, Hita Garcia F, Darwell C, Booher D, Kubota Y, Mikheyev AS, Economo EP. Colonize, radiate, decline: Unraveling the dynamics of island community assembly with Fijian trap-jaw ants. Evolution 2020; 74:1082-1097. [PMID: 32342495 PMCID: PMC7384189 DOI: 10.1111/evo.13983] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 04/09/2020] [Indexed: 01/17/2023]
Abstract
The study of island community assembly has been fertile ground for developing and testing theoretical ideas in ecology and evolution. The ecoevolutionary trajectory of lineages after colonization has been a particular interest, as this is a key component of understanding community assembly. In this system, existing ideas, such as the taxon cycle, posit that lineages pass through a regular sequence of ecoevolutionary changes after colonization, with lineages shifting toward reduced dispersal ability, increased ecological specialization, and declines in abundance. However, these predictions have historically been difficult to test. Here, we integrate phylogenomics, population genomics, and X-ray microtomography/3D morphometrics, to test hypotheses for whether the ecomorphological diversity of trap-jaw ants (Strumigenys) in the Fijian archipelago is assembled primarily through colonization or postcolonization radiation, and whether species show ecological shifts toward niche specialization, toward upland habitats, and decline in abundance after colonization. We infer that most Fijian endemic Strumigenys evolved in situ from a single colonization and have diversified to fill a large fraction of global morphospace occupied by the genus. Within this adaptive radiation, lineages trend to different degrees toward high elevation, reduced dispersal ability, and demographic decline, and we find no evidence of repeated colonization that displaces the initial radiation. Overall these results are only partially consistent with taxon cycle and associated ideas, while highlighting the potential role of priority effects in assembling island communities.
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Affiliation(s)
- Cong Liu
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
| | - Eli M. Sarnat
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
- Antwork Consulting LLCDavisCalifornia95616
| | - Nicholas R. Friedman
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
| | - Francisco Hita Garcia
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
| | - Clive Darwell
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
| | - Douglas Booher
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
- Field Museum of Natural HistoryChicagoIllinois60605
- Department of entomologyUniversity of IllinoisUrbanaIllinois61801
- Georgia Museum of Natural HistoryAthensGeorgia30602
| | - Yasuhiro Kubota
- Faculty of ScienceUniversity of the RyukyusNishiharaOkinawaJapan
| | - Alexander S. Mikheyev
- Ecology and Evolution UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
- Evolutionary Genomics Research GroupAustralian National UniversityCanberraAustralia
| | - Evan P. Economo
- Biodiversity and Biocomplexity UnitOkinawa Institute of Science and Technology Graduate University, OnnaOkinawa904‐0495Japan
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Darwell CT, Fischer G, Sarnat EM, Friedman NR, Liu C, Baiao G, Mikheyev AS, Economo EP. Genomic and phenomic analysis of island ant community assembly. Mol Ecol 2020; 29:1611-1627. [PMID: 31820838 DOI: 10.1111/mec.15326] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/27/2019] [Accepted: 12/06/2019] [Indexed: 01/25/2023]
Abstract
Island biodiversity has long fascinated biologists as it typically presents tractable systems for unpicking the eco-evolutionary processes driving community assembly. In general, two recurring themes are of central theoretical interest. First, immigration, diversification, and extinction typically depend on island geographical properties (e.g., area, isolation, and age). Second, predictable ecological and evolutionary trajectories readily occur after colonization, such as the evolution of adaptive trait syndromes, trends toward specialization, adaptive radiation, and eventual ecological decline. Hypotheses such as the taxon cycle draw on several of these themes to posit particular constraints on colonization and subsequent eco-evolutionary dynamics. However, it has been challenging to examine these integrated dynamics with traditional methods. Here, we combine phylogenomics, population genomics and phenomics, to unravel community assembly dynamics among Pheidole (Hymenoptera, Formicidae) ants in the isolated Fijian archipelago. We uphold basic island biogeographic predictions that isolated islands accumulate diversity primarily through in situ evolution rather than dispersal, and population genomic support for taxon cycle predictions that endemic species have decreased dispersal ability and demography relative to regionally widespread taxa. However, rather than trending toward island syndromes, ecomorphological diversification in Fiji was intense, filling much of the genus-level global morphospace. Furthermore, while most endemic species exhibit demographic decline and reduced dispersal, we show that the archipelago is not an evolutionary dead-end. Rather, several endemic species show signatures of population and range expansion, including a successful colonization to the Cook islands. These results shed light on the processes shaping island biotas and refine our understanding of island biogeographic theory.
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Affiliation(s)
- Clive T Darwell
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Georg Fischer
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Eli M Sarnat
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Nicholas R Friedman
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Cong Liu
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Guilherme Baiao
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
| | - Alexander S Mikheyev
- Ecology and Evolution Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan.,Research School of Biology, Evolutionary Genomics Research Group, Australian National University, Acton, ACT, Australia
| | - Evan P Economo
- Biodiversity and Biocomplexity Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan
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Matos-Maraví P, Clouse RM, Sarnat EM, Economo EP, LaPolla JS, Borovanska M, Rabeling C, Czekanski-Moir J, Latumahina F, Wilson EO, Janda M. An ant genus-group (Prenolepis) illuminates the biogeography and drivers of insect diversification in the Indo-Pacific. Mol Phylogenet Evol 2018; 123:16-25. [PMID: 29448063 DOI: 10.1016/j.ympev.2018.02.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Revised: 11/16/2017] [Accepted: 02/06/2018] [Indexed: 11/25/2022]
Abstract
The Malay Archipelago and the tropical South Pacific (hereafter the Indo-Pacific region) are considered biodiversity hotspots, yet a general understanding of the origins and diversification of species-rich groups in the region remains elusive. We aimed to test hypotheses for the evolutionary processes driving insect species diversity in the Indo-Pacific using a higher-level and comprehensive phylogenetic hypothesis for an ant clade consisting of seven genera. We estimated divergence times and reconstructed the biogeographical history of ant species in the Prenolepis genus-group (Formicidae: Formicinae: Lasiini). We used a fossil-calibrated phylogeny to infer ancestral geographical ranges utilizing a biogeographic model that includes founder-event speciation. Ancestral state reconstructions of the ants' ecological preferences, and diversification rates were estimated for selected Indo-Pacific clades. Overall, we report that faunal interchange between Asia and Australia has occurred since at least 20-25 Ma, and early dispersal to the Fijian Basin happened during the early and mid-Miocene (ca. 10-20 Ma). Differences in diversification rates across Indo-Pacific clades may be related to ecological preference breadth, which in turn may have facilitated geographical range expansions. Ancient dispersal routes suggested by our results agree with the palaeogeography of the region. For this particular group of ants, the rapid orogenesis in New Guinea and possibly subsequent ecological shifts may have promoted their rapid diversification and widespread distribution across the Indo-Pacific.
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Affiliation(s)
- Pável Matos-Maraví
- Institute of Entomology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Department of Zoology, Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech Republic; Department of Biological and Environmental Sciences, University of Gothenburg, Göteborg, Sweden; The Gothenburg Global Biodiversity Centre, Göteborg, Sweden.
| | - Ronald M Clouse
- Division of Invertebrate Zoology, American Museum of Natural History, New York City, NY, USA
| | - Eli M Sarnat
- Department of Entomology, University of Illinois, IL, USA
| | - Evan P Economo
- Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - John S LaPolla
- Deparment of Biological Sciences, Towson University, Towson, MD, USA
| | - Michaela Borovanska
- Institute of Entomology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic
| | - Christian Rabeling
- School of Life Sciences, Arizona State University, Tempe, AZ, USA; Museum of Comparative Zoology, Harvard University, Cambridge, MA, USA
| | - Jesse Czekanski-Moir
- Department of Environmental and Forest Biology, 1 Forestry Drive, State University of New York, Syracuse, NY, USA
| | - Fransina Latumahina
- Department of Forestry, Agriculture Faculty, Pattimura University, Ambon, Indonesia
| | - Edward O Wilson
- Museum of Comparative Zoology, Harvard University, Cambridge, MA, USA
| | - Milan Janda
- Institute of Entomology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Cátedras CONACYT, Laboratorio Nacional de Análisis y Síntesis Ecológica, ENES, UNAM, Morelia, Mexico
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Sarnat EM, Friedman NR, Fischer G, Lecroq-Bennet B, Economo EP. Rise of the spiny ants: diversification, ecology and function of extreme traits in the hyperdiverse genus Pheidole (Hymenoptera: Formicidae). Biol J Linn Soc Lond 2017. [DOI: 10.1093/biolinnean/blx081] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Fischer G, Sarnat EM, Economo EP. Revision and Microtomography of the Pheidole knowlesi Group, an Endemic Ant Radiation in Fiji (Hymenoptera, Formicidae, Myrmicinae)Myrmicinae). PLoS One 2016; 11:e0158544. [PMID: 27462877 PMCID: PMC4963041 DOI: 10.1371/journal.pone.0158544] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 06/17/2016] [Indexed: 11/24/2022] Open
Abstract
The Fijian islands, a remote archipelago in the southwestern Pacific, are home to a number of spectacular endemic radiations of plants and animals. Unlike most Pacific archipelagos, these evolutionary radiations extend to social insects, including ants. One of the most dramatic examples of ant radiation in Fiji has occurred in the hyperdiverse genus Pheidole. Most of the 17 native Fijian Pheidole belong to one of two species groups that descended from a single colonization, yet have evolved dramatically contrasting morphologies: the spinescent P. roosevelti species group, and the more morphologically conservative P. knowlesi species group. Here we revise the knowlesi group, in light of recent phylogenetic results, and enhanced with modern methods of X-ray microtomography. We recognize six species belonging to this group, including two of which we describe as new: Pheidole caldwelli Mann, Pheidole kava sp. n., Pheidole knowlesi Mann, P. ululevu sp. n., P. vatu Mann, and P. wilsoni Mann. Detailed measurements and descriptions, identification keys, and high-resolution images for queens, major and minor workers are provided. In addition, we include highly detailed 3D surface reconstructions for all available castes.
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Affiliation(s)
- Georg Fischer
- Okinawa Institute of Science & Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, Japan, 904-0495
- * E-mail: ;
| | - Eli M. Sarnat
- Okinawa Institute of Science & Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, Japan, 904-0495
| | - Evan P. Economo
- Okinawa Institute of Science & Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, Japan, 904-0495
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, United States of America
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7
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Abstract
The objective of this study is to provide a detailed taxonomic resource for identifying and studying ants in the genus Pheidole that have established beyond their native ranges. There is an increasing need for systematists to study taxa of specific concern to 21st century environmental, food security and public health challenges. Systematics has an important role to play in both the theoretical and applied disciplines of invasion biology. Few invaders impact terrestrial ecosystems more than ants. Among the world’s 100 worst invasive species is the cosmopolitan and highly destructive Pheidolemegacephala (Fabricius). Accurate identification of Pheidolemegacephala is imperative for the success of screening, management and eradication programs designed to protect native ecosystems from the impacts of this destructive species. However, accurate identification of Pheidole species is difficult because of their taxonomic diversity, dimorphic worker caste and lack of taxonomic resources. Illustrated keys are included, along with the taxonomic history, taxonomic diagnoses, biological notes and risk statements for the 14 most invasive members of the genus. Global distribution maps based on over 14,000 specimen and literature records are presented for each species. These results of this work will facilitate identification of pest species, determination of climatic and habitat requirements, discovery of pest origins, horizon scanning and assessment of invasion pathways. The following new synonym is proposed, with the senior synonym listed first and the junior synonyms in parentheses: Pheidoleindica Mayr (= Pheidoleteneriffana Forel, and its synonyms Pheidoletaina Aguayo and Pheidolevoeltzkowii Forel). Pheidolenavigans Forel, stat. rev., stat. n. is removed from synonymy and elevated to species rank. It is proposed that records of Pheidolemoerens Forel outside of the Mesoamerica and the Caribbean refer instead to Pheidolenavigans or other heterospecific taxa in the Pheidoleflavens species complex. We propose that the names Pheidoleanastasii Emery and Pheidolefloridana Emery have been widely misapplied to North American outdoor records of Pheidolebilimeki Mayr. It is suggested that the synonymy of Pheidolelauta Wheeler be transferred from Pheidolefloridana Emery to Pheidolebilimeki Mayr.
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Affiliation(s)
- Eli M Sarnat
- Department of Entomology, University of Illinois at Urbana-Champaign, 320 Morrill Hall 505 South Goodwin Avenue, Urbana, IL 61801, USA
| | - Georg Fischer
- Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, Japan, 904-0495
| | - Benoit Guénard
- School of Biological Sciences, The University of Hong Kong, Kadoorie Biological Sciences Building, Pok Fu Lam Road, Hong Kong SAR, China
| | - Evan P Economo
- Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa, Japan, 904-0495; Department of Ecology and Evolutionary Biology, University of Michigan, 830 N. University St., Ann Arbor, MI 48109 USA
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Economo EP, Sarnat EM, Janda M, Clouse R, Klimov PB, Fischer G, Blanchard BD, Ramirez LN, Andersen AN, Berman M, Guénard B, Lucky A, Rabeling C, Wilson EO, Knowles LL. Breaking out of biogeographical modules: range expansion and taxon cycles in the hyperdiverse ant genus Pheidole. J Biogeogr 2015; 42:2289-2301. [PMID: 27660394 PMCID: PMC5014176 DOI: 10.1111/jbi.12592] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
AIM We sought to reconstruct the biogeographical structure and dynamics of a hyperdiverse ant genus, Pheidole, and to test several predictions of the taxon cycle hypothesis. Using large datasets on Pheidole geographical distributions and phylogeny, we (1) inferred patterns of biogeographical modularity (clusters of areas with similar faunal composition), (2) tested whether species in open habitats are more likely to be expanding their range beyond module boundaries, and (3) tested whether there is a bias of lineage flow from high- to low-diversity areas. LOCATION The Old World. METHODS We compiled and jointly analysed a comprehensive database of Pheidole geographical distributions, the ecological affinities of different species, and a multilocus phylogeny of the Old World radiation. We used network modularity methods to infer biogeographical structure in the genus and comparative methods to evaluate the hypotheses. RESULTS The network analysis identified eight biogeographical modules, and a suite of species with anomalous ranges that are statistically more likely to occur in open habitat, supporting the hypothesis that open habitats promote range expansion. Phylogenetic analysis shows evidence for a cascade pattern of colonization from Asia to New Guinea to the Pacific, but no 'upstream' colonization in the reverse direction. MAIN CONCLUSIONS The distributions of Pheidole lineages in the Old World are highly modular, with modules generally corresponding to biogeographical regions inferred in other groups of organisms. However, some lineages have expanded their ranges across module boundaries, and these species are more likely to be adapted to open habitats rather than interior forest. In addition, there is a cascade pattern of dispersal from higher to lower diversity areas during these range expansions. Our findings are consistent with the taxon cycle hypothesis, although they do not rule out alternative interpretations.
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Affiliation(s)
- Evan P. Economo
- Okinawa Institute of Science and Technology Graduate University1919‐1 TanchaOnna‐sonOkinawa904‐0495Japan
- Department of Ecology & Evolutionary BiologyMuseum of ZoologyUniversity of MichiganAnn ArborMIUSA
| | - Eli M. Sarnat
- Department of EntomologyUniversity of Illinois at Urbana‐ChampaignChicagoILUSA
| | - Milan Janda
- Biology CentreCzech Academy of SciencesČeské BudějoviceCzech Republic
- Department of BiologyUniversity of GuanajuatoGuanajuatoMexico
| | - Ronald Clouse
- Department of Bioinformatics and GenomicsUniversity of North Carolina at CharlotteCharlotteNCUSA
| | - Pavel B. Klimov
- Department of Ecology & Evolutionary BiologyMuseum of ZoologyUniversity of MichiganAnn ArborMIUSA
- Department of ZoologyTyumen State UniversityTyumenRussia
| | - Georg Fischer
- Okinawa Institute of Science and Technology Graduate University1919‐1 TanchaOnna‐sonOkinawa904‐0495Japan
| | - Benjamin D. Blanchard
- Department of Ecology & Evolutionary BiologyMuseum of ZoologyUniversity of MichiganAnn ArborMIUSA
- Committee on Evolutionary BiologyUniversity of ChicagoChicagoILUSA
| | - Lizette N. Ramirez
- Department of Ecology & Evolutionary BiologyMuseum of ZoologyUniversity of MichiganAnn ArborMIUSA
| | | | - Maia Berman
- CSIRO Land & Water FlagshipDarwinNTAustralia
| | - Benoit Guénard
- Okinawa Institute of Science and Technology Graduate University1919‐1 TanchaOnna‐sonOkinawa904‐0495Japan
| | - Andrea Lucky
- Department of Entomology & NematologyUniversity of FloridaGainesvilleFLUSA
| | | | | | - L. Lacey Knowles
- Department of Ecology & Evolutionary BiologyMuseum of ZoologyUniversity of MichiganAnn ArborMIUSA
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Economo EP, Klimov P, Sarnat EM, Guénard B, Weiser MD, Lecroq B, Knowles LL. Global phylogenetic structure of the hyperdiverse ant genus Pheidole reveals the repeated evolution of macroecological patterns. Proc Biol Sci 2015; 282:20141416. [PMID: 25429013 PMCID: PMC4262160 DOI: 10.1098/rspb.2014.1416] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Adaptive radiations are of particular interest owing to what they reveal about the ecological and evolutionary regulation of biodiversity. This applies to localized island radiations such as Darwin's finches, and also to rapid radiations occurring on a global scale. Here we analyse the macroevolution and macroecology of Pheidole, a famously hyperdiverse and ecologically dominant ant genus. We generate and analyse four novel datasets: (i) a robust global phylogeny including 285 Pheidole species, (ii) a global database on regional Pheidole richness in 365 political areas summarizing over 97 000 individual records from more than 6500 studies, (iii) a global database of Pheidole richness from 3796 local communities and (iv) a database of Pheidole body sizes across species. Analysis of the potential climate drivers of richness revealed that the patterns are statistically very similar across different biogeographic regions, with both regional and local richness associated with the same coefficients of temperature and precipitation. This similarity occurs even though phylogenetic analysis shows that Pheidole reached dominance in communities through serial localized radiations into different biomes within different continents and islands. Pheidole body size distributions have likewise converged across geographical regions. We propose these cases of convergence indicate that the global radiation of Pheidole is structured by deterministic factors regulating diversification and diversity.
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Affiliation(s)
- Evan P Economo
- Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son 904-0495, Japan Department of Ecology and Evolutionary Biology, Museum of Zoology, University of Michigan, 830 N University Street, Ann Arbor, MI 48701, USA
| | - Pavel Klimov
- Department of Ecology and Evolutionary Biology, Museum of Zoology, University of Michigan, 830 N University Street, Ann Arbor, MI 48701, USA Tyumen State University, 10 Semakova St., Tyumen 625003, Russian Federation
| | - Eli M Sarnat
- Department of Entomology, University of Illinois at Urbana-Champaign, 320 Morrill Hall, 505 S. Goodwin Avenue, Urbana, IL 61801, USA
| | - Benoit Guénard
- Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son 904-0495, Japan
| | - Michael D Weiser
- Department of Biology, University of Oklahoma, 730 Van Vleet Oval, Norman, OK 73019, USA
| | - Beatrice Lecroq
- Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son 904-0495, Japan
| | - L Lacey Knowles
- Department of Ecology and Evolutionary Biology, Museum of Zoology, University of Michigan, 830 N University Street, Ann Arbor, MI 48701, USA
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10
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Hita Garcia F, Sarnat EM, Economo EP. Revision of the ant genus Proceratium Roger (Hymenoptera, Proceratiinae) in Fiji. Zookeys 2015:97-112. [PMID: 25684999 PMCID: PMC4311701 DOI: 10.3897/zookeys.475.8761] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 12/17/2014] [Indexed: 11/12/2022] Open
Abstract
The Fiji archipelago harbours a surprisingly diverse and endemic ant fauna, despite its isolated and remote location in the South Pacific. The ant genus Proceratium is present on Fiji with three endemic species, of which Proceratiumoceanicum De Andrade, 2003 and Proceratiumrelictum Mann, 1921 were previously known. In this study we describe the third species: Proceratiumvinakasp. n. All three species are members of the widespread and species-rich Proceratiumsilaceum clade. In order to integrate the new species into the current taxonomic system, we present an illustrated identification key to the worker caste of the three Fijian species. In addition, we provide a detailed description of Proceratiumvinaka, as well as species accounts for the other two species, which include diagnoses, taxonomic discussions, specimen photographs, and a distribution map.
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Affiliation(s)
- Francisco Hita Garcia
- Entomology, California Academy of Sciences, San Francisco, U.S.A. ; Okinawa Institute of Science and Technology Graduate University, Onna-son, Okinawa, 904-0495, Japan
| | - Eli M Sarnat
- University of Illinois Department of Entomology, Illinois, USA
| | - Evan P Economo
- Okinawa Institute of Science and Technology Graduate University, Onna-son, Okinawa, 904-0495, Japan
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11
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Clouse RM, Janda M, Blanchard B, Sharma P, Hoffmann BD, Andersen AN, Czekanski-Moir JE, Krushelnycky P, Rabeling C, Wilson EO, Economo EP, Sarnat EM, General DM, Alpert GD, Wheeler WC. Molecular phylogeny of Indo-Pacific carpenter ants (Hymenoptera: Formicidae,Camponotus) reveals waves of dispersal and colonization from diverse source areas. Cladistics 2014; 31:424-437. [DOI: 10.1111/cla.12099] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/02/2014] [Indexed: 11/27/2022] Open
Affiliation(s)
- Ronald M. Clouse
- Department of Bioinformatics and Genomics; University of North Carolina at Charlotte; 9201 University City Blvd Charlotte NC 28223 USA
- Division of Invertebrate Zoology; American Museum of Natural History; Central Park West at 79th St. New York City NY 10024 USA
| | - Milan Janda
- Biology Centre; Czech Academy of Sciences; Branisovska 31 370 05 Ceske Budejovice Czech Republic
- Museum of Comparative Zoology; Harvard University; 26 Oxford Street Cambridge MA 02138 USA
| | - Benjamin Blanchard
- Department of Ecology and Evolutionary Biology; University of Michigan; 2019 Kraus Natural Science Building Ann Arbor MI 48109 USA
| | - Prashant Sharma
- Division of Invertebrate Zoology; American Museum of Natural History; Central Park West at 79th St. New York City NY 10024 USA
| | | | | | - Jesse E. Czekanski-Moir
- Department of Biology; Program in Ecology and Evolutionary Biology; University of Oklahoma; Norman OK 73019 USA
| | - Paul Krushelnycky
- Department of Plant and Environmental Protection Sciences; University of Hawaiʻi at Mānoa; 3050 Maile Way Room 310 Honolulu HI 96822 USA
| | - Christian Rabeling
- Museum of Comparative Zoology; Harvard University; 26 Oxford Street Cambridge MA 02138 USA
| | - Edward O. Wilson
- Museum of Comparative Zoology; Harvard University; 26 Oxford Street Cambridge MA 02138 USA
| | - Evan P. Economo
- Okinawa Institute of Science and Technology; 1919-1 Tancha Onna-son Kunigami gun Okinawa Japan 904-0495
| | - Eli M. Sarnat
- Department of Entomology; University of Illinois; 320 Morrill Hall 505 South Goodwin Avenue Urbana IL 61801 USA
| | - David M. General
- University of the Philippines at Los Baños; Museum of Natural History; Los Baños 4031 Laguna Philippines
| | - Gary D. Alpert
- Museum of Comparative Zoology; Harvard University; 26 Oxford Street Cambridge MA 02138 USA
| | - Ward C. Wheeler
- Division of Invertebrate Zoology; American Museum of Natural History; Central Park West at 79th St. New York City NY 10024 USA
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Abstract
Pristomyrmex tsujiisp. n., an endemic species of the Fiji islands, is described from the worker, ergatoid queen, alate queen and male castes. The alate queen and male castes of Pristomyrmex mandibularis Mann are also described for the first time. The ergatoid queens for both species appear to be morphologically intermediate between the worker and alate queen castes. Pristomyrmex tsujii is readily distinguished from Pristomyrmex mandibularis by the lack of well-developed propodeal spines. Although both species occur across the Fijian archipelago, they are rarely encountered and workers are most often collected from sifted litter. The descriptions are illustrated with specimen photographs, line drawings and a distribution map.
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Affiliation(s)
- Eli M Sarnat
- Antwork Consulting, P.O. Box 563 Happy Camp, CA 96039 USA
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Sarnat EM, Blanchard B, Guénard B, John Fasi, Evan P Economo. Checklist of the ants (Hymenoptera, Formicidae) of the Solomon Islands and a new survey of Makira Island. Zookeys 2013; 257:47-88. [PMID: 23653494 PMCID: PMC3591739 DOI: 10.3897/zookeys.257.4156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 12/17/2012] [Indexed: 12/02/2022] Open
Abstract
The intent of this paper is to facilitate future research of the Solomon Islands ant fauna by providing the first comprehensively researched species inventory in over 75 years. The species list presented here includes the names of all ant species recorded from the islands that are available in the literature together with specimen records from several museum collections and new records from our 2008 Makira field expedition. All the names of described species presented are valid in accordance with the most recent Formicidae classification. In total, the checklist is composed of 237 species and subspecies (including 30 morphospecies) in 59 genera representing nine subfamilies. We report that the recent field expedition added 67 new species records to Makira and 28 new species records to the Solomon Islands. Our research recovered species occurrence records for 32 individual islands and five island groups. The five islands with the highest number of recorded species are: Makira (142 spp.), Guadalcanal (107 spp.), Malaita (70 spp.), Santa Isabel (68 spp.), and Rennell (66 spp.). Based on our results, we discuss the taxonomic composition of the archipelago's ant fauna, which islands are most in need of additional sampling, and the importance of establishing biodiversity baselines before environmental threats such as the invasive ant Wasmannia auropunctata cause irrevocable harm to the native biodiversity.
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Affiliation(s)
- Eli M Sarnat
- Antwork Consulting, LLC, PO Box 563 Happy Camp, CA 96039 USA ; Department of Entomology, University of Illinois, Urbana, Illinois 61801
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Economo EP, Sarnat EM. Revisiting the Ants of Melanesia and the Taxon Cycle: Historical and Human-Mediated Invasions of a Tropical Archipelago. Am Nat 2012; 180:E1-16. [DOI: 10.1086/665996] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Suarez AV, Bernard M, Tsutsui ND, Blackledge TA, Copren K, Sarnat EM, Wild AL, Getz WM, Starks PT, Will K, Palsbøll PJ, Hauber ME, Moritz C, Richman AD. Conflicts around a study of Mexican crops. Nature 2002; 417:897; author reply 897-8. [PMID: 12087376 DOI: 10.1038/417897a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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