What shapes cerambycid beetle communities in a tropical forest mosaic? Assessing the effects of host tree identity, forest structure, and vertical stratification

被引:9
|
作者
Li, Lin [1 ,2 ,3 ]
Aguilar, Reinaldo [4 ]
Berkov, Amy [1 ,2 ,5 ]
机构
[1] CUNY City Coll, Dept Biol, Convent Ave & 138 St, New York, NY 10031 USA
[2] CUNY City Coll, Grad Ctr, Convent Ave & 138 St, New York, NY 10031 USA
[3] New York Bot Garden, 2900 South Blvd, Bronx, NY 10458 USA
[4] Los Charcos Osa, Apdo 76-8203, Peninsula De Osa, Costa Rica
[5] Amer Museum Nat Hist, Div Invertebrate Zool, Cent Pk West & 81st St, New York, NY 10024 USA
关键词
Eschweilera; fragmentation; Gorybia; Gustavia; host associations; Neoeutrypanus; specificity; stratification; RAIN-FOREST; COSTA-RICA; FRENCH-GUIANA; OSA PENINSULA; SUCCESSIONAL GRADIENT; SPECIES COMPOSITION; SAPROXYLIC BEETLES; COLEOPTERA; DEFORESTATION; DIVERSITY;
D O I
10.1111/btp.12432
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Due to anthropogenic activities, tropical rain forests face many challenges in sustaining biodiversity and maintaining global climates. This study explores how forest successional stage, tree composition, and stratum affect communities of saproxylic cerambycid beetlesconcealed feeders that play important roles in forest nutrient cycling. Forty trees in five families (Fabaceae, Lecythidaceae, Malvaceae, Moraceae, and Sapotaceae) were sampled in a mosaic of old-growth and secondary forest on the Osa Peninsula, Costa Rica. Bait branches yielded 3549 cerambycid individuals in 49 species. Species richness was almost identical in old-growth and secondary forest, and both yielded specialists, but abundance was higher in old-growth forest. Overall community structure was most strongly influenced by host plant species; within most plant families it was also impacted by forest successional status. Moraceae was the exception, presumably because the focal tree species was abundant in both old-growth and secondary forest. Several host and old-growth specialist species reached high densities within patches of old-growth forest, but seldom colonized apparently suitable trees within secondary forest. This suggests that even small areas of old-growth forest can act as refuges, but that secondary forest may act as a barrier to dispersal. The vulnerability of specialized saproxylic insects to land use change will be linked to the ability of their preferred hosts to disperse to and persist in successional habitats; rearing studies may provide the most accurate method to monitor community changes over time. Resumen Debido a las actividades antropogenicas, las selvas tropicales enfrentan muchos desafios en el mantenimiento de la biodiversidad y el mantenimiento de los climas mundiales. Esta investigacion explora como las etapa de sucesion de los bosques, composicion de los arboles, y el estrato afectan las comunidades de escarabajos cerambycido saproxilicos, los cuales desempenan papeles importantes en el ciclo de nutrientes del bosque. Cuarenta arboles en cinco familias (Fabaceae, Lecythidaceae, Malvaceae, Moraceae, y Sapotaceae) fueron indentificados en un mosaico de bosques maduro y secundario en la Peninsula Osa, Costa Rica. Ramas de cebo produjeron 3549 individuos Cerambycid en 49 especies. La riqueza de especies fue casi identica en bosques maduro y secundario, y ambos cedio especialistas, pero la abundancia fue mayor en los bosques de edad madura. Estructura general de la comunidad fue mas fuertemente influenciada por las especies de plantas huesped; en la mayoria de las familias de plantas que tambien se vio afectado por el estado de sucesion forestal. Moraceae fue la excepcion, presumiblemente porque las especies de arboles focales era abundante en bosques maduro y secundario. Varias especies especialistas de bosques maduro alcanzaron altas densidades dentro de los parches de bosque maduro, pero rara vez colonizaron arboles aparentemente ideales de bosque secundario. Esto sugiere que pequenas areas de bosques antiguos pueden actuar como refugios, y que los bosques secundarios pueden actuar como una barrera para la dispersion. La vulnerabilidad de los insectos saproxilicos especializados al uso diferente del suelo estara vinculada con la capacidad de dispersar de sus arboles preferidos y que se mantenga en los habitats de sucesion; los estudios de cria puede proporcionar el metodo mas preciso para monitorear los cambios de la comunidad a traves del tiempo.
引用
收藏
页码:675 / 684
页数:10
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