Importance of high severity in a physical removal treatment for controlling invasive Spartina alterniflora
Importance of high severity in a physical removal treatment for controlling invasive Spartina alterniflora
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物理去除治疗中高强度对于控制入侵性互花米草的重要性
DOI：
10.1016/j.ecoleng.2021.106375
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发表时间：
2021-11
影响因子：
3.8
通讯作者：
Yang Gao
中科院分区：
文献类型：
--
作者：
Long Tang;Qing Shi Zhou;Wei Guo;Peng Li;Yang Gao
物理去除处理（如修剪，拔，挖）被广泛用于控制入侵植物。每个处理去除的总生物量是物理去除处理的严重程度;因此，严重程度的大小取决于处理后发芽的芽和新芽的表现。物理去除处理通过减少入侵植物的生物量来削弱入侵植物的生长;然而，很少有研究表明修剪处理的高控制效果是否取决于其具有高严重性;以及如何根据新梢和新梢的表现来构建第一次修剪的时间、连续修剪之间的间隔和修剪频率的有效和成本效益的组合。本研究采用24种刈割处理（不同刈割时间、不同刈割间隔和不同刈割频率）对互花米草（Spartina alterniflora）入侵种群进行控制。S.次年测定互花米草素以评价防治效果。结果表明，防治效果随严重程度的增加而增加。然而，一个积极的关系之间的严重性和修剪的频率没有被发现，因为生物量减少，每次修剪大大增加频率。相比之下，最高的严重程度记录时。互花米草在有性繁殖开始时进行第一次修剪，当新梢停止生长时进行第二次修剪，每次修剪都去除了高生物量，第二年生长下降了70%。由于只需要两次修剪就能显著降低生长速度，因此这种具有成本效益的治疗方法可能用于控制其他入侵的米草物种。更广泛地说，这项研究证实了物理去除处理的高严重性和高控制效率之间的关系，以及处理的严重性与入侵植物的芽和新芽的表现之间的关系，这种关系可以促进构建第一次处理的时间和连续处理之间的间隔的成本效益组合。
Physical removal treatments (such as clipping, pulling, and digging) are widely used to control invasive plants. The total biomass removed by each treatment is the severity of physical removal treatment; therefore, the magnitude of severity depends on the performance of shoots and new shoots that sprout after treatment. Physical removal treatments weaken the growth of invasive plants by reducing the biomass of invasive plants; however, few studies have demonstrated whether a high control efficacy of clipping treatments depends on it having high severity; and how to construct an efficient and cost-effective combination of timing of first clipping, interval between successive clippings, and frequency of clipping according to the performance of shoots and new shoots. Here, 24 clipping treatments (with different timings of first clipping, intervals between successive clippings, and frequency of clipping) were performed for controlling invasiveSpartina alterniflorapopulations in China. The biomass ofS. alterniflorain the following year was measured to evaluate control efficacy. The results showed that control efficacy increased with increasing severity. However, a positive relationship between severity and the frequency of clipping was not found, because the biomass removed by each clipping substantially decreased with increased frequency. In contrast, the highest severity was documented whenS. alterniflorawas firstly clipped at the start of sexual reproduction and second clipping was performed when new shoots stopped growing, high biomass was removed at each clipping, with a 70% decrease in growth the following year. As only two clippings were required to produce this marked reduction in growth, this cost-effective treatment could potentially be used to control other invasiveSpartinaspecies. More broadly, this study confirmed the relationships between high severity and high control efficacy of physical removal treatments and between the severity of the treatments and performance of shoots and new shoots of invasive plants, and such relationships can facilitate the construction of cost-effective combination of the timing of first treatment and interval between successive treatments.
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