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Alcantara EP, Ebert MB, Ferreira-Silva C, Forti LR, Morais DH, Pérez-Ponce de León G, Silva RJ. An integrative taxonomy study reveals a rare new species of the genus Creptotrema (Trematoda: Allocreadiidae) in an endangered frog in South America. J Helminthol 2024; 98:e23. [PMID: 38462988 DOI: 10.1017/s0022149x24000099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
During an ecological study with a near-endangered anuran in Brazil, the Schmidt's Spinythumb frog, Crossodactylus schmidti Gallardo, 1961, we were given a chance to analyze the gastrointestinal tract of a few individuals for parasites. In this paper, we describe a new species of an allocreadiid trematode of the genus Creptotrema Travassos, Artigas & Pereira, 1928, which possesses a unique trait among allocreadiids (i.e., a bivalve shell-like muscular structure at the opening of the ventral sucker); the new species represents the fourth species of allocreadiid trematode parasitizing amphibians. Besides, the new species is distinguished from other congeners by the combination of characters such as the body size, ventral sucker size, cirrus-sac size, and by having small eggs. DNA sequences through the 28S rDNA and COI mtDNA further corroborated the distinction of the new species. Phylogenetic analyses placed the newly generated sequences in a monophyletic clade together with all other sequenced species of Creptotrema. Genetic divergences between the new species and other Creptotrema spp. varied from 2.0 to 4.2% for 28S rDNA, and 15.1 to 16.8% for COI mtDNA, providing robust validation for the recognition of the new species. Even though allocreadiids are mainly parasites of freshwater fishes, our results confirm anurans as hosts of trematodes of this family. Additionally, we propose the reallocation of Auriculostoma ocloya Liquin, Gilardoni, Cremonte, Saravia, Cristóbal & Davies, 2022 to the genus Creptotrema. This study increases the known diversity of allocreadiids and contributes to our understanding of their evolutionary relationships, host-parasite relationships, and biogeographic history.
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Affiliation(s)
- E P Alcantara
- Universidade Estadual Paulista (UNESP), Instituto de Biosciências, Setor de Parasitologia, Rua Professor Doutor Antônio Celso Wagner Zanin, 250, Botucatu, São Paulo18618-689, Brazil
| | - M B Ebert
- Universidade Estadual Paulista (UNESP), Instituto de Biosciências, Setor de Parasitologia, Rua Professor Doutor Antônio Celso Wagner Zanin, 250, Botucatu, São Paulo18618-689, Brazil
| | - C Ferreira-Silva
- Universidade Federal do Ceará (UFC), Departamento de Biologia, Centro de Ciências, Av. Mister Hull, s/n, CEP 60455-760, Fortaleza, Ceará, Brazil
| | - L R Forti
- Departamento de Biociências, Universidade Federal Rural do Semi-Árido (UFERSA), Av. Francisco Mota, 572 - Bairro Costa e Silva, 59625-900, Mossoró - Rio Grande do Norte, Brazil
| | - D H Morais
- Universidade Federal de Uberlândia (UFU), Instituto de Ciências Agrárias, LMG-746, Km 1, Monte Carmelo, 38500-000, MG, Brazil
| | - G Pérez-Ponce de León
- Escuela Nacional de Estudios Superiores Unidad Mérida (ENES)-UNAM, Km 4.5 Carretera Mérida-Tetiz, Ucú, Yucatán, Mexico
| | - R J Silva
- Universidade Estadual Paulista (UNESP), Instituto de Biosciências, Setor de Parasitologia, Rua Professor Doutor Antônio Celso Wagner Zanin, 250, Botucatu, São Paulo18618-689, Brazil
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Perrin A, Khimoun A, Ollivier A, Richard Y, Pérez-Rodríguez A, Faivre B, Garnier S. Habitat fragmentation matters more than habitat loss: The case of host-parasite interactions. Mol Ecol 2023; 32:951-969. [PMID: 36461661 DOI: 10.1111/mec.16807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Revised: 11/29/2022] [Accepted: 12/01/2022] [Indexed: 12/05/2022]
Abstract
While ecologists agree that habitat loss has a substantial negative effect on biodiversity it is still very much a matter of debate whether habitat fragmentation has a lesser effect and whether this effect is positive or negative for biodiversity. Here, we assess the relative influence of tropical forest loss and fragmentation on the prevalence of vector-borne blood parasites of the genera Plasmodium and Haemoproteus in six forest bird species. We also determine whether habitat loss and fragmentation are associated with a rise or fall in prevalence. We sample more than 4000 individual birds from 58 forest sites in Guadeloupe and Martinique. Considering 34 host-parasite combinations independently and a fine characterization of the amount and spatial configuration of habitat, we use partial least square regressions to disentangle the relative effects of forest loss, forest fragmentation, landscape heterogeneity, and local weather conditions on spatial variability of parasite prevalence. Then we test for the magnitude and the sign of the effect of each environmental descriptor. Strikingly, we show that forest fragmentation explains twice as much of the variance in prevalence as habitat loss or landscape heterogeneity. In addition, habitat fragmentation leads to an overall rise in prevalence in Guadeloupe, but its effect is variable in Martinique. Both habitat loss and landscape heterogeneity exhibit taxon-specific effects. Our results suggest that habitat loss and fragmentation may have contrasting effects between tropical and temperate regions and that inter-specific interactions may not respond in the same way as more commonly used biodiversity metrics such as abundance and diversity.
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Affiliation(s)
- Antoine Perrin
- Biogéosciences, UMR 6282 CNRS, Université Bourgogne Franche-Comté, Dijon, France.,Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland
| | - Aurélie Khimoun
- Biogéosciences, UMR 6282 CNRS, Université Bourgogne Franche-Comté, Dijon, France
| | - Anthony Ollivier
- Biogéosciences, UMR 6282 CNRS, Université Bourgogne Franche-Comté, Dijon, France
| | - Yves Richard
- Biogéosciences, UMR 6282 CNRS, Université Bourgogne Franche-Comté, Dijon, France
| | | | - Bruno Faivre
- Biogéosciences, UMR 6282 CNRS, Université Bourgogne Franche-Comté, Dijon, France
| | - Stéphane Garnier
- Biogéosciences, UMR 6282 CNRS, Université Bourgogne Franche-Comté, Dijon, France
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Torrent frogs emit acoustic signals of a narrower spectral range in habitats with longer-lasting biotic background noise. Behav Processes 2022; 200:104700. [DOI: 10.1016/j.beproc.2022.104700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 06/29/2022] [Accepted: 07/01/2022] [Indexed: 11/19/2022]
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