Are vegetative reproduction capacities the cause of widespread invasion of Eurasian Salicaceae in Patagonian river landscapes?
Are vegetative reproduction capacities the cause of widespread invasion of Eurasian Salicaceae in Patagonian river landscapes?
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DOI：
10.1371/journal.pone.0050652
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Leyer I
中科院分区：
文献类型：
--
作者：
Thomas LK;Tölle L;Ziegenhagen B;Leyer I
近几十年来，入侵的柳树和杨树（杨柳科）在阿根廷巴塔哥尼亚的大部分河流沿岸建立了茂密的漫滩森林。这些入侵过程可能会影响洪堡柳作为该地区唯一的本土洪泛区树种。据认为，无性繁殖的特性可以在入侵物种在新范围内的建立中发挥重要作用。因此，为了有助于更好地了解河岸系统中柳树和杨树的入侵，并评估对洪堡树的潜在影响，对本地和入侵杨柳科的营养繁殖能力进行了分析。在温室实验中，我们考虑了三种不同的湿度和两种不同的土壤条件，研究了巴塔哥尼亚里奥内格罗地区三种最主要的入侵杨柳科植物（两种柳属杂交品种和胡杨属品种）以及洪堡杨树的切割存活和生长性能。在随后的实验中，去除了之前实验中插条的芽和根生物量，并将裸露的插条重新种植以测试其重新发芽的能力。这两种入侵柳树杂交品种的表现比洪堡柳树和胡杨品种要好得多。在所有处理组合下，在重复的生物量损失后往往会更成功地重新发芽。考虑到泛滥平原柳树的营养和生殖新补充的生态学，结果表明，更旺盛的营养繁殖能力可能是巴塔哥尼亚入侵柳树杂交成功的关键特性，对洪堡柳树构成了潜在威胁。
In recent decades, invasive willows and poplars (Salicaceae) have built dense floodplain forests along most of the rivers in Patagonia, Argentina. These invasion processes may affect Salix humboldtiana as the only native floodplain tree species in this region. It is assumed, that the property to reproduce vegetatively can play an important role in the establishment of invasive species in their new range. Thus, in order to contribute to a better understanding of willow and poplar invasions in riparian systems and to assess the potential impacts on S. humboldtiana the vegetative reproduction capacities of native and invasive Salicaceae were analysed. In a greenhouse experiment, we studied cutting survival and growth performance of the three most dominant invasive Salicaceae of the Patagonian Río Negro region (two Salix hybrids and Populus spec.), as well as S. humboldtiana, taking into account three different moisture and two different soil conditions. In a subsequent experiment, the shoot and root biomass of cuttings from the former experiment were removed and the bare cuttings were replanted to test their ability to re-sprout. The two invasive willow hybrids performed much better than S. humboldtiana and Populus spec. under all treatment combinations and tended to re-sprout more successfully after repeated biomass loss. Taking into account the ecology of vegetative and generative recruits of floodplain willows, the results indicate that the more vigorous vegetative reproduction capacity can be a crucial property for the success of invasive willow hybrids in Patagonia being a potential threat for S. humboldtiana.
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影响因子：
4.8
作者：
Clark, JS
通讯作者：
Clark, JS
影响因子：
6.9
作者：
Beismann, H;Wilhelmi, H;Speck, T
通讯作者：
Speck, T
影响因子：
1.8
作者：
Kennedy, SA;Ganf, GG;Walker, KF
通讯作者：
Walker, KF
DOI：
10.1046/j.1471-8286.2003.00332.x
发表时间：
2003-03-01
期刊：
MOLECULAR ECOLOGY NOTES
影响因子：
--
作者：
Barker, JHA;Pahlich, A;Karp, A
通讯作者：
Karp, A
影响因子：
4.9
作者：
Barrett, Spencer C. H.;Colautti, Robert I.;Eckert, Christopher G.
通讯作者：
Eckert, Christopher G.