The qualitative component of the effectiveness of seed dispersal by endozoochory encompasses seed deposition. Neltuma flexuosa, a keystone tree of the Monte biome, is dispersed by several animals and in this paper we aimed to study the qualitative aspect of its dispersal. We studied the effect of the dung of Bos taurus (cow), Equus ferus caballus (horse) and Dolichotis patagonum (mara) on seed germination and growth of N. flexuosa seedlings. We conducted greenhouse experiments using dung or field soil as substrate, under two water regimes: pot capacity and pulsed irrigation; testing manually scarified seeds collected from trees. We observed that the effect of dung on the two key processes of plant regeneration was different and depended on the animal species: it either reduced or did not affect maximum germination, and promoted or did not affect seedling growth, compared to the soil. Horse and mara manure reduced germination, while manure from both domestic animals promoted seedling growth. The water storage capacity, drying rate and nutrient level of the substrates did not directly explain the results obtained. Overall, cow dung appeared as the best microsite for early regeneration of N. flexuosa, while mara manure was the most restrictive for this process.

动物体内种子传播有效性的定性组成部分包括种子沉积。Neltuma flexuosa是蒙特生物群落的基石树，由多种动物传播，在本文中，我们旨在研究其传播的定性方面。我们研究了Bos taurus（牛）、Equus ferus caballus（马）和Dolichotis patagonum（马拉）的粪便对N. flexuosa幼苗种子萌发和生长的影响。我们使用粪便或田间土壤作为基质，在两种水制下进行温室实验：罐容量和脉冲灌溉；测试从树上收集的手动松土种子。我们观察到，粪便对植物再生的两个关键过程的影响是不同的，并且取决于动物种类：与土壤相比，粪便要么减少或不影响最大发芽，要么促进或不影响幼苗生长。马粪和马拉粪会降低发芽率，而两种家畜的粪肥则会促进幼苗生长。基质的储水能力、干燥速率和营养水平并不能直接解释所获得的结果。总体而言，牛粪似乎是弯曲猪笼草早期再生的最佳微场所，而马拉粪对此过程的限制最大。