Species identity influences secondary removal of seeds of Neotropical pioneer tree species
Species identity influences secondary removal of seeds of Neotropical pioneer tree species
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物种身份影响新热带先锋树种种子的二次去除
DOI：
10.1007/s11258-017-0745-7
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发表时间：
2017
期刊：
影响因子：
1.7
通讯作者：
Dalling, James W.
中科院分区：
文献类型：
--
作者：
Ruzi, Selina A.;Roche, Daniel P.;Zalamea, Paul-Camilo;Robison, Abigail C.;Dalling, James W.
一次传播剂将种子从母体植物转移到土壤表面，在那里它们经常被二次传播剂再次移动。然而，同一地点的不同物种经历二次扩散的程度往往是未知的，尽管这一机制对于确定招募机会以及随后的群落结构非常重要。在这里，我们研究了12种新热带先锋树种在巴拿马巴罗科罗拉多岛低地热带森林的五个地点放置在土壤表面或土壤表面以下2厘米处的次生去除速率。我们调查了物种特性、初级传播模式(动物或风)、休眠类型、种子质量和在种子库中的持久力是否与去化率相关。我们还调查了季节(干燥或潮湿)是否会影响土壤表面的去除。总体而言，表面种子和埋在地下的种子都具有很高的流动性。我们发现，初级扩散方式和休眠类型对土壤表面(12种)和地下(6种)的去除速率都有影响。然而，这种模式在很大程度上是由物种认同驱动的。季节对土壤表面的种子去除速率没有影响。小种子先锋物种的扩散与物种高度相关，这表明使用更广泛的类别，如初级扩散模式或休眠类型，不能准确地描述阻碍我们理解群落聚集在单个植物功能群中的观察到的模式。
Primary dispersal agents move seeds from the maternal plant to the soil surface where they are often moved again by secondary dispersal agents. However, the extent to which different species in the same location experience secondary dispersal is often unknown despite the importance of this mechanism for determining recruitment opportunities and consequently community structure. Here we examine the secondary removal rates of 12 Neotropical pioneer species placed either on or 2 cm below the soil surface at five locations in lowland tropical forest on Barro Colorado Island, Panama. We investigated whether species identity, primary dispersal mode (animal or wind), dormancy type, seed mass, and capacity to persist in the seed bank were correlated with removal rate. We also investigated whether season (dry or wet) influences removal from the soil surface. In general, both superficial and buried seeds were highly mobile. We found an effect of primary dispersal mode and dormancy type on removal rates both on (12 species) and beneath the soil surface (six species). However, this pattern was largely driven by species identity. Season had no influence on seed removal rates from the soil surface. The dispersal of small-seeded pioneer species is highly species dependent, indicating that generalizations made using broader categories, such as primary dispersal mode or dormancy type, do not accurately describe the observed patterns hindering our understanding of community assembly within even a single functional group of plants.
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影响因子：
1.4
作者：
Fornara, DA;Dalling, JW
通讯作者：
Dalling, JW
影响因子：
1.4
作者：
ESTRADA, A;COATESESTRADA, R
通讯作者：
COATESESTRADA, R
影响因子：
1.3
作者：
Leal, IR;Oliveira, PS
通讯作者：
Oliveira, PS
影响因子：
5.6
作者：
Zalamea PC;Sarmiento C;Arnold AE;Davis AS;Dalling JW
通讯作者：
Dalling JW
哥斯达黎加 Amblycerus Cistelinus (Bruchidae) 捕食 Guazuma ulmifolia (Sterculiaceae) 种子的生境内和生境间变化
影响因子：
4.8
作者：
D. Janzen
通讯作者：
D. Janzen