Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica)
The Crau Plain grasshopper, Prionotropis rhodanica Uvarov, 1923 (Orthoptera: Pamphagidae: Thrinchinae), is a rare grasshopper species endemic to the Crau Plain, a steppic habitat in France with unique floristic and faunistic communities. During recent decades, the area covered by these steppic grasslands has been highly reduced and fragmented due to the development of irrigation-based agriculture, roads, as well as industrial and military complexes. The restricted distribution, low population density and poor dispersal ability of P. rhodanica, combined with the destruction of its habitat, has led to the classification of this species as critically endangered in the IUCN Red List of Threatened Species. Decreases in habitat quality due to intensive grazing in the remnant grassland patches constitute an additional threat for P. rhodanica that can impact population dynamics at a relatively small-scale. In this work, we focused on a small area of about 3 km2 occupied by one of the largest subpopulations observed in 2000–2001. We conducted a single-time snapshot intensive survey of grasshopper density and genetic variation at 11 microsatellite markers. We used a recent method, MAPI, to visualize the spatial genetic structure as a continuous surface and to determine, with the simultaneous use of spatial cross-correlograms, whether the normalized difference vegetation index, which informs on the balance between vegetation productivity and grazing intensity, can explain grasshopper population structure at such a fine scale. We found that both population density and gene flow were strongly and positively correlated to habitat quality (higher productivity of grasslands and/or lower sheep grazing). The spatial scales of interaction between these variables were estimated to be highly similar, in the range of 812–880 meters. This result suggests that P. rhodanica is very sensitive to the quality of the grasslands it inhabits.
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Subjects: | P01 - Conservation de la nature et ressources foncières, L60 - Taxonomie et géographie animales, http://aims.fao.org/aos/agrovoc/c_6272, http://aims.fao.org/aos/agrovoc/c_3081, |
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dig-cirad-fr-5880512022-02-15T07:20:28Z http://agritrop.cirad.fr/588051/ http://agritrop.cirad.fr/588051/ Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica). Piry Sylvain, Berthier Karine, Streiff Réjane, Cros-Arteil Sandrine, Foucart Antoine, Tatin Laurent, Bröder Linda, Hochkirch Axel, Chapuis Marie Pierre. 2018. Journal of Orthoptera Research, 27 (1) : 61-73.https://doi.org/10.3897/jor.27.15036 <https://doi.org/10.3897/jor.27.15036> Researchers Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica) Piry, Sylvain Berthier, Karine Streiff, Réjane Cros-Arteil, Sandrine Foucart, Antoine Tatin, Laurent Bröder, Linda Hochkirch, Axel Chapuis, Marie Pierre eng 2018 Journal of Orthoptera Research P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales Provence-Alpes-Côte d'Azur France http://aims.fao.org/aos/agrovoc/c_6272 http://aims.fao.org/aos/agrovoc/c_3081 The Crau Plain grasshopper, Prionotropis rhodanica Uvarov, 1923 (Orthoptera: Pamphagidae: Thrinchinae), is a rare grasshopper species endemic to the Crau Plain, a steppic habitat in France with unique floristic and faunistic communities. During recent decades, the area covered by these steppic grasslands has been highly reduced and fragmented due to the development of irrigation-based agriculture, roads, as well as industrial and military complexes. The restricted distribution, low population density and poor dispersal ability of P. rhodanica, combined with the destruction of its habitat, has led to the classification of this species as critically endangered in the IUCN Red List of Threatened Species. Decreases in habitat quality due to intensive grazing in the remnant grassland patches constitute an additional threat for P. rhodanica that can impact population dynamics at a relatively small-scale. In this work, we focused on a small area of about 3 km2 occupied by one of the largest subpopulations observed in 2000–2001. We conducted a single-time snapshot intensive survey of grasshopper density and genetic variation at 11 microsatellite markers. We used a recent method, MAPI, to visualize the spatial genetic structure as a continuous surface and to determine, with the simultaneous use of spatial cross-correlograms, whether the normalized difference vegetation index, which informs on the balance between vegetation productivity and grazing intensity, can explain grasshopper population structure at such a fine scale. We found that both population density and gene flow were strongly and positively correlated to habitat quality (higher productivity of grasslands and/or lower sheep grazing). The spatial scales of interaction between these variables were estimated to be highly similar, in the range of 812–880 meters. This result suggests that P. rhodanica is very sensitive to the quality of the grasslands it inhabits. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/588051/1/PUB684.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.3897/jor.27.15036 10.3897/jor.27.15036 info:eu-repo/semantics/altIdentifier/doi/10.3897/jor.27.15036 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.3897/jor.27.15036 |
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P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales http://aims.fao.org/aos/agrovoc/c_6272 http://aims.fao.org/aos/agrovoc/c_3081 P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales http://aims.fao.org/aos/agrovoc/c_6272 http://aims.fao.org/aos/agrovoc/c_3081 |
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P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales http://aims.fao.org/aos/agrovoc/c_6272 http://aims.fao.org/aos/agrovoc/c_3081 P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales http://aims.fao.org/aos/agrovoc/c_6272 http://aims.fao.org/aos/agrovoc/c_3081 Piry, Sylvain Berthier, Karine Streiff, Réjane Cros-Arteil, Sandrine Foucart, Antoine Tatin, Laurent Bröder, Linda Hochkirch, Axel Chapuis, Marie Pierre Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica) |
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The Crau Plain grasshopper, Prionotropis rhodanica Uvarov, 1923 (Orthoptera: Pamphagidae: Thrinchinae), is a rare grasshopper species endemic to the Crau Plain, a steppic habitat in France with unique floristic and faunistic communities. During recent decades, the area covered by these steppic grasslands has been highly reduced and fragmented due to the development of irrigation-based agriculture, roads, as well as industrial and military complexes. The restricted distribution, low population density and poor dispersal ability of P. rhodanica, combined with the destruction of its habitat, has led to the classification of this species as critically endangered in the IUCN Red List of Threatened Species. Decreases in habitat quality due to intensive grazing in the remnant grassland patches constitute an additional threat for P. rhodanica that can impact population dynamics at a relatively small-scale. In this work, we focused on a small area of about 3 km2 occupied by one of the largest subpopulations observed in 2000–2001. We conducted a single-time snapshot intensive survey of grasshopper density and genetic variation at 11 microsatellite markers. We used a recent method, MAPI, to visualize the spatial genetic structure as a continuous surface and to determine, with the simultaneous use of spatial cross-correlograms, whether the normalized difference vegetation index, which informs on the balance between vegetation productivity and grazing intensity, can explain grasshopper population structure at such a fine scale. We found that both population density and gene flow were strongly and positively correlated to habitat quality (higher productivity of grasslands and/or lower sheep grazing). The spatial scales of interaction between these variables were estimated to be highly similar, in the range of 812–880 meters. This result suggests that P. rhodanica is very sensitive to the quality of the grasslands it inhabits. |
format |
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P01 - Conservation de la nature et ressources foncières L60 - Taxonomie et géographie animales http://aims.fao.org/aos/agrovoc/c_6272 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Piry, Sylvain Berthier, Karine Streiff, Réjane Cros-Arteil, Sandrine Foucart, Antoine Tatin, Laurent Bröder, Linda Hochkirch, Axel Chapuis, Marie Pierre |
author_facet |
Piry, Sylvain Berthier, Karine Streiff, Réjane Cros-Arteil, Sandrine Foucart, Antoine Tatin, Laurent Bröder, Linda Hochkirch, Axel Chapuis, Marie Pierre |
author_sort |
Piry, Sylvain |
title |
Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica) |
title_short |
Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica) |
title_full |
Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica) |
title_fullStr |
Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica) |
title_full_unstemmed |
Fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered Crau Plain grasshopper (Pamphagidae: Prionotropis rhodanica) |
title_sort |
fine-scale interactions between habitat quality and genetic variation suggest an impact of grazing on the critically endangered crau plain grasshopper (pamphagidae: prionotropis rhodanica) |
url |
http://agritrop.cirad.fr/588051/ http://agritrop.cirad.fr/588051/1/PUB684.pdf |
work_keys_str_mv |
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