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首页> 外文期刊>Seed Science Research >Frugivory and seed dispersal effectiveness in two Miconia (Melastomataceae) species from ferruginous campo rupestre
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Frugivory and seed dispersal effectiveness in two Miconia (Melastomataceae) species from ferruginous campo rupestre

机译：来自Ferruginous Campo Rupestre的两种咪星（MelaStomataceae）物种中的节日和种子分散效果

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摘要

Seed dispersal effectiveness (SDE) is a useful framework to explore the evolutionary and ecological consequences of seed dispersal to plant fitness. However, SDE is poorly studied in tropical open grasslands. Here, we studied both quantitative and qualitative components of SDE in two species of Miconia (Melastomataceae) from ferruginous campo rupestre, a vegetation highly threatened by mining activities. We determined fruit traits and fruit availability and found that fruits of both species are produced in times of resource scarcity at the study site. Based on the number of visits and the number of fruits removed per visit, we calculated the quantitative component of SDE for both species. Finally, we explored the qualitative component of SDE by means of a controlled experiment that simulated the effects of gut passage on seed germination. Bird species differed strongly in the quantitative component of SDE. Gut passage did not affect germination compared with hand-extracted seeds, except for a minor negative effect on germination time in M. pepericarpa. However, seeds within intact fruits showed lower germination percentages compared with hand-extracted seeds. Our data indicate that Miconia species from ferruginous campo rupestre are visited by a diverse assemblage of generalist birds that differ in quantitative, but not qualitative, seed dispersal effectiveness. We argue that planting Miconia species can overcome seed limitation in degraded areas and thus assist ecological restoration after mining abandonment.
机译：种子分散效果（SDE）是一种有用的框架，用于探索种子分散对植物健身的进化和生态后果。然而，SDE在热带开阔的草原中却很差。在这里，我们研究了来自Ferruginous Campo Rupestre的两种米诺尼亚（Melastomataceae）的SDE的定量和定性组分，这是由采矿活动受到威胁的植被。我们确定了果实性状和水果可用性，发现两种物种的果实是在研究现场的资源稀缺时期的。根据访问的次数和每次访问中除去的果实数量，我们计算了两种物种的SDE的定量组分。最后，我们通过控制实验探索了SDE的定性成分，这些实验模拟了肠道通道对种子萌发的影响。鸟类在SDE的定量组分中有强烈不同。除了在百分比肽中的萌发时间外，肠道通道不会影响发芽的萌发。然而，与手提取的种子相比，完整的果实内的种子显示出较低的萌发百分比。我们的数据表明，来自Ferruginous Campo Rupestre的摩尼奥尼亚物种被一般的一般鸟类的多样化鸟类进行了定量，但不是定性的种子分散效果。我们认为种植米诺尼亚物种可以克服降解区域的种子限制，从而在采矿遗弃后协助生态恢复。

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