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Regeneration of threatened alkali steppe vegetation after a heavy disturbance by disk tillage
Plant Ecology ( IF 1.7 ) Pub Date : 2020-08-18 , DOI: 10.1007/s11258-020-01073-6
D. Galvánek , D. Dítě , P. Eliáš , Z. Dítě

Several methods of tillage are among the practices most destructive to inland saline grasslands, and can result in their complete deterioration. Despite the high frequency of habitat destruction by these means, the recovery of the saline vegetation and regeneration abilities of halophytes are still not sufficiently known. The reaction of inland saline grasslands to disk tillage was studied on the Jatov site located in the Pannonian bioregion of Central Europe. Changes in species composition were tested using ordination methods (DCA, CCA). Although the species composition recovered to a certain extent after the 4 years following the disturbance, the original zonation of halophytic vegetation was disturbed and did not recover. Disturbance primarily suppressed perennial halophytes and promoted the occurrence of species with a ruderal strategy. Testing of halophyte reaction to tillage showed the contracting responses of various halophytic species. The species Atriplex littoralis, Plantago maritima and Matricaria recutita reacted positively to tillage due to the reduced competition. The species Artemisia santonicum subsp. patens and Dichodon viscidum were suppressed by tillage in initial stages, but later recovered their populations. Only A. santonicum subsp. patens was able to return to the abundance seen before the disturbance. The only halophytic species which was unable to recover was a shallow-rooted grass Puccinellia distans. Our study showed that a Pannonian alkali steppe is able to recover quite quickly after tillage, if the soil disturbance is shallow and subsequent management takes place. Some halophytes may even profit for a short time from tillage, but the original species composition cannot be restored in the short term.



中文翻译:

盘耕严重扰动后濒危碱草原植被的再生

耕作的几种方法是对内陆盐碱草原最具破坏性的做法,并可能导致其完全退化。尽管通过这些手段破坏生境的频率很高,但对盐生植物的恢复和盐生植物的再生能力仍然知之甚少。在中欧Pannonian生物区的Jatov地点研究了内陆盐碱草原对圆盘耕作的反应。使用排序方法(DCA,CCA)测试了物种组成的变化。尽管干扰后的4年后物种组成在一定程度上恢复了,但盐生植物的原始分区受到了干扰,没有恢复。干扰主要是抑制多年生盐生植物,并通过策略促进了物种的发生。盐生植物对耕作的反应测试显示了各种盐生植物的收缩反应。种类由于竞争减少,滨藜,滨海车前草毛母菊对耕作反应积极。该物种为属亚种。最初,耕种抑制了彭定康粘齿,但后来恢复了种群。仅A. santonicum亚种。帕滕斯能够恢复到骚乱之前的丰度。唯一无法恢复的盐生植物种是浅根草Puccinellia distans。我们的研究表明,如果土壤扰动较浅且需要进行后续管理,则潘诺尼亚碱草原在耕种后能够很快恢复。一些盐生植物甚至可能在短时间内从耕种中获利,但短期内无法恢复原始物种组成。

更新日期:2020-08-19
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