Effects of Tree Genotypic Diversity and Species Diversity on the Arthropod Community Associated with Big-leaf Mahogany

被引:22
|
作者
Campos-Navarrete, Maria J. [1 ,2 ]
Munguia-Rosas, Miguel A. [3 ]
Abdala-Roberts, Luis [1 ]
Quinto, Javier [1 ]
Parra-Tabla, Victor [1 ]
机构
[1] Univ Autonoma Yucatan, Dept Ecol Trop, Merida 97000, Yucatan, Mexico
[2] Tecnol Nacl Mexico, Inst Tecnol Tizimin, Div Estudios Posgrado & Invest, Tizimin 97700, Yucatan, Mexico
[3] Inst Politecn Nacl CINVESTAV, Ctr Invest & Estudios Avanzados, Dept Ecol Humana, Merida 97310, Yucatan, Mexico
基金
芬兰科学院;
关键词
genotypic diversity; herbivores; predators; species diversity; species richness; SWIETENIA-MACROPHYLLA; GENETIC DIVERSITY; PLANT DIVERSITY; POPULATIONS; ABUNDANCE;
D O I
10.1111/btp.12250
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Despite potential interactive effects of plant species and genotypic diversity (SD and GD, respectively) on consumers, studies have usually examined these effects separately. We evaluated the individual and combined effects of tree SD and mahogany (Swietenia macrophylla) GD on the arthropod community associated with mahogany. We conducted this study within the context of a tree diversity experiment consisting of 74 plots with 64 saplings/plot. We sampled 24 of these plots, classified as monocultures of mahogany or polycultures of four species (including mahogany). Within each plot type, mahogany was represented by either one or four maternal families. We surveyed arthropods on mahogany and estimated total arthropod abundance and species richness, as well as abundance and richness separately for herbivorous and predatory arthropods. Overall tree SD and mahogany GD had positive effects on total arthropod species richness and abundance on mahogany, and also exerted interactive effects on total species richness (but not abundance). Analyses conducted by trophic level group showed contrasting patterns; SD positively influenced herbivore species richness but not abundance, and did not affect either predator richness or abundance. GD influenced predator species richness but not abundance, and did not influence herbivore abundance or richness. There were interactive effects of GD and SD only for predator species richness. These results provide evidence that intra- and inter-specific plant diversity exert interactive controls on associated consumer communities, and that the relative importance of SD and GD may vary among higher trophic levels, presumably due to differences in the underlying mechanisms or consumer traits. Resumen A pesar del potencial de efectos de interaccion entre la diversidad de especies y la diversidad genotipica (DS y DG respectivamente) sobre los consumidores, en general dichos efectos han sido evaluados de manera aislada. Evaluamos los efectos individuales y combinados de la DS de arboles y de la DG de la caoba (Swietenia microphylla) sobre la comunidad de artropodos asociados a la caoba. Llevamos a cabo este estudio en el contexto de un experimento de diversidad de arboles consistente en 74 parcelas con 64 arboles juveniles/parcela. Muestreamos 24 parcelas clasificadas como monocultivos de caoba o policultivos de cuatro especies (incluida la caoba). Dentro de cada tipo de parcela, la caoba estuvo representada por una o cuatro familias maternas. Se colectaron los artropodos asociados a la caoba y estimamos la abundancia y riqueza de especies, asi como de manera separada la abundancia y riqueza de artropodos herbivoros y artropodos depredadores. En general la DS de arboles y la DG de caoba tuvieron efectos positivos sobre la riqueza y abundancia total de artropodos y tambien ejercieron un efecto de interaccion sobre la riqueza total (pero no sobre la abundancia). El analisis separado por gremio trofico mostro patrones contrastantes; la DS influyo positivamente en la riqueza de herbivoros pero no en la abundancia y no afecto la riqueza o abundancia de los depredadores. Por su parte la DG afecto la riqueza de especies de los depredadores pero no su abundancia y no afecto la riqueza o abundancia de los herbivoros. Se observaron efectos de interaccion entre la DS y la DG solo para la riqueza de especies de depredadores. Nuestros resultados proveen evidencias de que la diversidad intra e inter-especifica de plantas ejercen un control interactivo sobre las comunidades de consumidores, y que la importancia relativa de la DS y la DG puede variar entre niveles troficos superiores, presumiblemente debido a diferencias en mecanismos subyacentes o por rasgos de los consumidores.
引用
收藏
页码:579 / 587
页数:9
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