Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae)
We studied the interaction between the plant Cnidoscolus multilobus, its floral visitors and the predator spider Peucetia viridans . The diet of P. viridans was composed exclusively of arthropods (spiders 32%, insects 68%). Body length of prey was 5.9 ± 1.0 mm, and prey size range was 11.0 ± 0.4 m...
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| Aineistotyyppi: | Online |
| Kieli: | spa |
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Instituto de Ecología, A.C.
2012
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| Linkit: | https://abm.ojs.inecol.mx/index.php/abm/article/view/29 |
| _version_ | 1799771094326968320 |
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| author | Arango, Angélica M. López-Portillo, Jorge Parra-Tabla, Victor Hernández-Salazar, Laura T. Morales-Mávil, Jorge E. Rico-Gray, Victor |
| author_facet | Arango, Angélica M. López-Portillo, Jorge Parra-Tabla, Victor Hernández-Salazar, Laura T. Morales-Mávil, Jorge E. Rico-Gray, Victor |
| author_sort | Arango, Angélica M. |
| collection | ABM |
| description |
We studied the interaction between the plant
Cnidoscolus multilobus, its floral visitors and the predator spider Peucetia viridans . The diet of
P. viridans was composed exclusively of arthropods (spiders 32%, insects 68%). Body length of prey was 5.9 ± 1.0 mm, and prey size range was 11.0 ± 0.4 mm (i.e. 0.14-1.3 times larger than the spider). Based on feeding frequency and time available for prey capture and feeding, one spider may capture up to 3.9 prey items per day, depending on the time of year. From June to October 1998 we tested the number of floral
visits affected by the presence or absence of spiders (visual effect). Four treatments were tested on inflorescences: (1) no spiders, (2) with spider, (3) with modified spider (carapace painted red), and (4) with decoy spider. We found two patterns depending on the response of floral visitors to “invisible” spider treatments (with and no spiders) and “visible” spider treatments (painted and decoy). These patterns were closely associated with the abundance of visitors.
Using panicle enclosures, we estimated the effect of spider presence on seed set. In months with lower abundance of floral visitors (June, July and October), panicles without spiders had significantly more seeds than those with spiders. Whereas in August and September, the months with the highest number of floral visitors, there were no significant differences between treatments. Our results suggest that floral visitors were able to recognize visible spiders and avoid the inflorescences that have them, but were unable to recognize the presence of unpainted
P. viridans. Since many of those visitors are potential pollinators, spider presence may indirectly decrease seed set by C. multilobus on months when floral visitors are less abundant.
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| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-29 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2012 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-292023-02-16T22:08:26Z Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae) Efecto de la presencia de la araña Peucetia viridans (Oxyopidae) en los visitantes florales y la producción de semillas de Cnidoscolus multilobus (Euphorbiaceae) Arango, Angélica M. López-Portillo, Jorge Parra-Tabla, Victor Hernández-Salazar, Laura T. Morales-Mávil, Jorge E. Rico-Gray, Victor extrafloral nectaries Mexico tritrophic systems Veracruz nectarios extraflorales México sistemas tritróficos Veracruz We studied the interaction between the plant Cnidoscolus multilobus, its floral visitors and the predator spider Peucetia viridans . The diet of P. viridans was composed exclusively of arthropods (spiders 32%, insects 68%). Body length of prey was 5.9 ± 1.0 mm, and prey size range was 11.0 ± 0.4 mm (i.e. 0.14-1.3 times larger than the spider). Based on feeding frequency and time available for prey capture and feeding, one spider may capture up to 3.9 prey items per day, depending on the time of year. From June to October 1998 we tested the number of floral visits affected by the presence or absence of spiders (visual effect). Four treatments were tested on inflorescences: (1) no spiders, (2) with spider, (3) with modified spider (carapace painted red), and (4) with decoy spider. We found two patterns depending on the response of floral visitors to “invisible” spider treatments (with and no spiders) and “visible” spider treatments (painted and decoy). These patterns were closely associated with the abundance of visitors. Using panicle enclosures, we estimated the effect of spider presence on seed set. In months with lower abundance of floral visitors (June, July and October), panicles without spiders had significantly more seeds than those with spiders. Whereas in August and September, the months with the highest number of floral visitors, there were no significant differences between treatments. Our results suggest that floral visitors were able to recognize visible spiders and avoid the inflorescences that have them, but were unable to recognize the presence of unpainted P. viridans. Since many of those visitors are potential pollinators, spider presence may indirectly decrease seed set by C. multilobus on months when floral visitors are less abundant. Estudiamos la interacción entre la planta Cnidoscolus multilobus, sus visitantes florales y la araña depredadora Peucetia viridans. La dieta de P. viridans estuvo compuesta exclusivamente por artrópodos (arañas 32%, insectos 68%). El tamaño del cuerpo de las presas fue de 5.9 ± 1.0 mm, y el ámbito de las presas fue de 11.0 ± 0.4 mm (i.e. 0.14-1.3 más grande que la araña). Basándonos en la frecuencia de alimentación y el tiempo disponible para capturar y alimentarse de las presas, una araña puede capturar hasta 3.9 presas por día, esto dependiendo de la época del año. Entre junio y octubre de 1998 probamos si el número de visitas a las flores era afectado por la presencia/ausencia de la araña (efecto visual). Probamos cuatro tratamientos: (1) sin araña, (2) con araña, (3) con araña modificada (carapacho pintado con rojo), y (4) araña falsa. Encontramos dos patrones dependiendo de la respuesta de los visitantes florales a la araña “invisible” (pintada y falsa). Estos patrones estaban cercanamente asociados con la abundancia de visitantes. Utilizando panículas cubiertas, estimamos el efecto de la presencia de las arañas sobre la producción de semillas. Durante los meses con menos abundancia de visitantes florales (junio, julio y octubre), las panículas sin arañas produjeron significativamente más semillas. Mientras que en agosto y septiembre, los meses con el mayor número de visitantes florales, no se encontraron diferencias significativas entre tratamientos. Los resultados sugieren que los visitantes florales pudieron evitar aquellas inflorescencias con arañas vivas visibles, pero no les fue posible reconocer a las arañas sin pintura. Ya que muchos visitantes florales son potenciales polinizadores, las arañas podrían indirectamente reducir el número de semillas en C. multilobus durante los meses cuando los visitantes florales eran menos abundantes y las arañas no estaban saciadas. Instituto de Ecología, A.C. 2012-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf https://abm.ojs.inecol.mx/index.php/abm/article/view/29 10.21829/abm100.2012.29 Acta Botanica Mexicana; No. 100 (2012); 1-14 Acta Botanica Mexicana; Núm. 100 (2012); 1-14 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/29/41 Derechos de autor 2015 Acta Botánica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Arango, Angélica M. López-Portillo, Jorge Parra-Tabla, Victor Hernández-Salazar, Laura T. Morales-Mávil, Jorge E. Rico-Gray, Victor Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae) |
| title | Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae) |
| title_full | Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae) |
| title_fullStr | Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae) |
| title_full_unstemmed | Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae) |
| title_short | Effect of the spider Peucetia viridans (Oxyopidae) on floral visitors and seed set of Cnidoscolus multilobus (Euphorbiaceae) |
| title_sort | effect of the spider peucetia viridans (oxyopidae) on floral visitors and seed set of cnidoscolus multilobus (euphorbiaceae) |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/29 |
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