Arsuffi T L, Suberkropp K
Department of Biology, New Mexico State University, 88003, Las Cruces, NM, USA.
Oecologia. 1989 Apr;79(1):30-37. doi: 10.1007/BF00378236.
Laboratory experiments were conducted to examine the effects of fungal species composition of leaf detritus on the feeding of distantly related macroinvertebrate shredders. Preferences of shredders representing three orders of insects (Diptera: Tipulidae; Plecoptera: Pteronarcidae; Trichoptera: Limnephilidae and Calamatoceridae) and one each of gastropods (Basommatophora: Planorbidae) and crustaceans (Amphipoda: Gammaridae) were compared. Shredder preferences were based on consumption of leaves separately colonized by one of eight species of aquatic hyphomycetes. The feeding patterns of the invertebrates ranged from lack of feeding to heavy consumption of fungal-colonized leaves. Where consumption occurred, rank orders of preference and degree of selectivity differed among invertebrate shredders. Differences in preferences together with relationships between degree of selectivity and the relative mobility and digestive specializations exhibited by shredders suggest that the exploitation of fungal-colonized leaf detritus by different taxa is affected by phylogenetic constraints. Our results suggest that fungal species composition affects the feeding of a variety of shredders and that fungal species composition may be as important as degree of conditioning in determining food selection by shredders.
开展了实验室实验，以研究落叶中真菌物种组成对亲缘关系较远的大型无脊椎动物碎食者摄食的影响。比较了代表三个昆虫目（双翅目：大蚊科；襀翅目：石蝇科；毛翅目：沼石蛾科和角石蛾科）的碎食者以及腹足纲（基眼目：扁卷螺科）和甲壳纲（端足目：钩虾科）各一种碎食者的偏好。碎食者的偏好基于对分别被八种水生真菌之一定殖的树叶的消耗情况。无脊椎动物的摄食模式从不摄食到大量消耗被真菌定殖的树叶不等。在有摄食行为的情况下，不同无脊椎动物碎食者的偏好排序和选择程度存在差异。偏好的差异以及选择程度与碎食者表现出的相对移动性和消化特化之间的关系表明，不同分类群对被真菌定殖的落叶的利用受到系统发育限制的影响。我们的结果表明，真菌物种组成会影响多种碎食者的摄食，并且在决定碎食者的食物选择方面，真菌物种组成可能与凋落物的分解程度同样重要。
