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首页> 美国卫生研究院文献>Wiley-Blackwell Online Open >Estimating seed dispersal distance: A comparison of methods using animal movement and plant genetic data on two primate‐dispersed Neotropical plant species
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Estimating seed dispersal distance: A comparison of methods using animal movement and plant genetic data on two primate‐dispersed Neotropical plant species

机译：估计种子散布距离：比较使用动物运动和植物遗传数据的两种灵长类动物散布的新热带植物物种的方法

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class="enumerated" style="list-style-type:decimal" id="ece35422-list-0001">Seed dispersal distance (SDD) critically influences the survival of seedlings, spatial patterns of genetic diversity within plant populations, and gene flow among plant populations. In animal‐dispersed species, foraging behavior and movement patterns determine SDD. Direct observations of seed dispersal events by animals in natural plant populations are mostly constrained by the high mobility and low visibility of seed dispersers. Therefore, diverse alternative methods are used to estimate seed dispersal distance, but direct comparisons of these approaches within the same seed dispersal system are mostly missing.We investigated two plant species with different life history traits, Leonia cymosa and Parkia panurensis, exclusively dispersed by two tamarin species, Saguinus mystax and Leontocebus nigrifrons. We compared SDD estimates obtained from direct observations, genetic identification of mother plants from seed coats, parentage analysis of seedlings/saplings, and phenomenological and mechanistic modeling approaches.SDD derived from the different methods ranged between 158 and 201 m for P. panurensis and between 178 and 318 m for L. cymosa. In P. panurensis, the modeling approaches resulted in moderately higher estimates than observations and genotyping of seed coats. In L. cymosa, parentage analysis resulted in a lower estimate than all other methods. Overall, SDD estimates for P. panurensis (179 ± 16 m; mean ± SD) were significantly lower than for L. cymosa (266 ± 59 m; mean ± SD).Differences among methods were related to processes of the seed dispersal loop integrated by the respective methods (e.g., seed deposition or seedling distribution). We discuss the merits and limitations of each method and highlight the aspects to be considered when comparing SDD derived from different methodologies. Differences among plant species were related to differences in reproductive traits influencing gut passage time and feeding behavior, highlighting the importance of plant traits on animal‐mediated seed dispersal distance.
机译：class =“ enumerated” style =“ list-style-type：decimal” id =“ ece35422-list-0001”> <！-list-behavior =列举的prefix-word = mark-type = decimal max-label- size = 0-> 种子扩散距离（SDD）严重影响幼苗的存活，植物种群内部遗传多样性的空间格局以及植物种群之间的基因流。在动物分散的物种中，觅食行为和运动方式决定了SDD。动物在天然植物种群中对种子传播事件的直接观察大多受到种子分散器高迁移率和低可见性的限制。因此，人们使用了多种替代方法来估计种子的传播距离，但是在同一种子传播系统中几乎没有直接比较这些方法的方法。 我们研究了两种具有不同生活史性状的植物，Leonia cymosa和帕克虫（pania panurensis），仅由两种绢毛猴物种（Saguinus mystax和Leontocebus nigrifrons）分散。我们比较了直接观察得到的SDD估算值，种皮对母体的遗传鉴定，幼苗/树苗的亲缘关系分析以及现象学和力学建模方法。 SDD是从158到201之间的不同方法得出的m。对于P.panurensis和178和318m之间的c.cymosa。在P.panurensis中，建模方法得出的估计值比种皮的观察值和基因分型要高。在L.cymosa中，通过亲子关系分析得出的估计值低于所有其他方法。总体而言，P.panurensis的SDD估计值（179±16 m;平均值±SD）明显低于Cysosa的（SD 266±59 m;平均值±SD）。 方法之间的差异与通过相应方法（例如，种子沉积或幼苗分布）整合种子扩散回路的过程。我们讨论了每种方法的优点和局限性，并突出了比较从不同方法派生的SDD时要考虑的方面。植物种类之间的差异与影响肠道通过时间和摄食行为的生殖性状的差异有关，突显了植物性状对动物介导的种子传播距离的重要性。

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