极端干旱事件期间和之后扩展范围和同类原生植物响应的时间动态

IF 7.1 1区 环境科学与生态学 Q1 ECOLOGY
Qiang Yang, G. F. (Ciska) Veen, Roel Wagenaar, Marta Manrubia, Freddy C. ten Hooven, Wim H. van der Putten
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引用次数: 2

摘要

气候变化导致许多物种向高纬度和高海拔地区迁移,并增加了它们遭受极端天气事件的风险。研究表明,范围转移植物物种在新土壤中的表现可能与相关原生土壤不同;然而,与相关的本地植物相比,人们对极端天气事件如何影响范围扩大的植物知之甚少。在这项研究中,我们利用室外中生态系统研究了扩展范围的植物物种如何在有和没有来自原始范围栖息地的活土壤的新范围栖息地的活土壤中应对极端干旱(匈牙利)。夏季干旱时,扩大范围植物群落的地上部生物量下降。尽管如此,在混合群落中,范围扩大者比同类原生植物产生更多的地上部生物量。在前一年有范围扩张历史的中生态系统中,本地植物产生的生物量较少。植物遗产或土壤来源的影响没有改变本地人或范围扩张者对夏季干旱的反应。在再湿润过程中,范围扩大者的生物量比同类本地植物的生物量少,但在前一年本地植物物种生长的新范围的土壤中具有更高的抗旱能力(存活率)。混合植物群落生物量格局以半人马属植物占优势;然而,并不是所有的植物种类都表现出这种普遍的模式。干旱减少了凋落物分解、微生物生物量和细菌、真菌和肉食性线虫的丰度。它们的丰度在再润湿过程中恢复。在前一年扩大范围者生长过的原野土壤中,微生物和真菌生物量较少,食真菌线虫较少。结果表明,在扩展范围与同源原生植物混合群落中,扩展范围植物在环境和干旱条件下的表现均优于同源原生植物。然而,当考虑单个物种的响应时,我们观察到同源物种对干旱的响应存在差异,因此在目前混合群落条件下,范围扩张者对干旱的响应与同源本地物种的响应并不均匀。扩大范围的植物物种减少了土壤真菌生物量和土壤食真菌线虫的数量,这表明扩大范围的植物物种的影响可以在土壤食物网中涓滴上升。
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Temporal dynamics of range expander and congeneric native plant responses during and after extreme drought events

Temporal dynamics of range expander and congeneric native plant responses during and after extreme drought events

Temporal dynamics of range expander and congeneric native plant responses during and after extreme drought events

Temporal dynamics of range expander and congeneric native plant responses during and after extreme drought events

Temporal dynamics of range expander and congeneric native plant responses during and after extreme drought events

Climate change is causing range shifts of many species to higher latitudes and altitudes and increasing their exposure to extreme weather events. It has been shown that range-shifting plant species may perform differently in new soil than related natives; however, little is known about how extreme weather events affect range-expanding plants compared to related natives. In this study we used outdoor mesocosms to study how range-expanding plant species responded to extreme drought in live soil from a habitat in a new range with and without live soil from a habitat in the original range (Hungary). During summer drought, the shoot biomass of the range-expanding plant community declined. In spite of this, in the mixed community, range expanders produced more shoot biomass than congeneric natives. In mesocosms with a history of range expanders in the previous year, native plants produced less biomass. Plant legacy or soil origin effects did not change the response of natives or range expanders to summer drought. During rewetting, range expanders had less biomass than congeneric natives but higher drought resilience (survival) in soils from the new range where in the previous year native plant species had grown. The biomass patterns of the mixed plant communities were dominated by Centaurea spp.; however, not all plant species within the groups of natives and of range expanders showed the general pattern. Drought reduced the litter decomposition, microbial biomass, and abundances of bacterivorous, fungivorous, and carnivorous nematodes. Their abundances recovered during rewetting. There was less microbial and fungal biomass, and there were fewer fungivorous nematodes in soils from the original range where range expanders had grown in the previous year. We concluded that in mixed plant communities of range expanders and congeneric natives, range expanders performed better, under both ambient and drought conditions, than congeneric natives. However, when considering the responses of individual species, we observed variations among pairs of congenerics, so that under the present mixed-community conditions there was no uniformity in responses to drought of range expanders versus congeneric natives. Range-expanding plant species reduced soil fungal biomass and the numbers of soil fungivorous nematodes, suggesting that the effects of range-expanding plant species can trickle up in the soil food web.

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来源期刊
Ecological Monographs
Ecological Monographs 环境科学-生态学
CiteScore
12.20
自引率
0.00%
发文量
61
审稿时长
3 months
期刊介绍: The vision for Ecological Monographs is that it should be the place for publishing integrative, synthetic papers that elaborate new directions for the field of ecology. Original Research Papers published in Ecological Monographs will continue to document complex observational, experimental, or theoretical studies that by their very integrated nature defy dissolution into shorter publications focused on a single topic or message. Reviews will be comprehensive and synthetic papers that establish new benchmarks in the field, define directions for future research, contribute to fundamental understanding of ecological principles, and derive principles for ecological management in its broadest sense (including, but not limited to: conservation, mitigation, restoration, and pro-active protection of the environment). Reviews should reflect the full development of a topic and encompass relevant natural history, observational and experimental data, analyses, models, and theory. Reviews published in Ecological Monographs should further blur the boundaries between “basic” and “applied” ecology. Concepts and Synthesis papers will conceptually advance the field of ecology. These papers are expected to go well beyond works being reviewed and include discussion of new directions, new syntheses, and resolutions of old questions. In this world of rapid scientific advancement and never-ending environmental change, there needs to be room for the thoughtful integration of scientific ideas, data, and concepts that feeds the mind and guides the development of the maturing science of ecology. Ecological Monographs provides that room, with an expansive view to a sustainable future.
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