菌食性甲虫几何形态学分析

Geometric Morphology Analysis of Fungus-feeding Beetles

菌食性甲虫与真菌之间的相互作用紧密且复杂,菌食性甲虫的形态演化是否受到真菌和环境因素的影响尚不可知.为此,选取12科菌食性甲虫并将其按栖息地的基质环境分为两类:a类栖息地的基质为森林生态系统落叶层腐殖质,b类栖息地的基质为经真菌菌丝体分解的林木;通过几何形态学手段对两类菌食性甲虫形态进行比较,探究菌食性甲虫形态多样性与生活习性之间的关系.研究发现,a类菌食性甲虫整体形态偏圆且纵向隆起;b类菌食性甲虫整体多扁平偏椭圆.因此,菌食性甲虫前胸背板和鞘翅形态上的多样性在一定程度上反映了菌食性甲虫对生存环境的适应性.

The relationship between fungi and fungus-feeding beetles is close and complex,and it is still unclear,if environmental and fungal factors have an impact on the morphological evolution of fungus-feeding beetles.Twelve families of fungus-feeding beetles were chosen and divided into two groups according to the lifestyles of each group.Group a’s habitat was made of humus found in the leaf litter layer of the forest environment,while Group b’s habitat was made of the forest that has been broken down by mycelia.Through the application of geometric morphometrics,a comparative analysis was conducted on two groups of fungus-feeding beetles to investigate the relationship between morphological diversity of fungus-feeding beetles and their life habits.According to the study,group a fungus-feeding beetles have a generally rounded and longitudinally elevated morphology,whereas group b fungus-feeding beetles are primarily oval and flat in shape.As a result,the variety in the pronotum and elytra morphology of fungus-eating beetles indicates,in part,how adaptable they are to their surroundings.