Response of degraded vegetation to introduction of prescribed burning or mowing management in a Mongolian steppe

Koyama, Asuka; Kubo, Daisuke; Yoshihara, Yu; Jamsran, Undarmaa; Okuro, Toshiya

doi:10.1111/grs.12113

Cited by 4 publications

(4 citation statements)

References 43 publications

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“…Some scholars have demonstrated that external disturbances can affect the biomass of grassland plants (Kawada et al, 2008;Koyama et al, 2016). Our results showed that MO, MG, and HG all significantly increased plant biomass in the C. meyeriana lowland meadows (although HG reduced plant biomass in 2017, probably due to the little precipitation in that year).…”

Section: Effects Of Utilization Mode On Grassland Plant Communitiesmentioning

confidence: 53%

Non-utilization Is Not the Best Way to Manage Lowland Meadows in Hulun Buir

Yin

et al. 2021

Front. Plant Sci.

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Carex meyeriana lowland meadow is an important component of natural grasslands in Hulun Buir. However, in Hulun Buir, fewer studies have been conducted on C. meyeriana lowland meadows than on other grassland types. To determine the most appropriate utilization mode for C. meyeriana lowland meadows, an experiment was conducted in Zhalantun city, Hulun Buir. Unused, moderately grazed, heavily grazed and mowed meadow sites were selected as the research objects. The analysis of experimental data from 4 consecutive years showed that relative to the other utilization modes, mowing and moderate grazing significantly increased C. meyeriana biomass. Compared with non-utilization, the other three utilization modes resulted in a higher plant diversity, and the moderately grazed meadow had the highest plant community stability. Moreover, principal component analysis (PCA) showed that among the meadow sites, the mowed meadow had the most stable plant community and soil physicochemical properties. Structural equation modeling (SEM) showed that grazing pressure was less than 0.25 hm2/sheep unit and that plant biomass in C. meyeriana lowland meadow increases with increasing grazing intensity, temperature and precipitation.

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Section: Effects Of Utilization Mode On Grassland Plant Communitiesmentioning

confidence: 53%

Non-utilization Is Not the Best Way to Manage Lowland Meadows in Hulun Buir

Yin

et al. 2021

Front. Plant Sci.

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“…The germination characteristics of A. adamsii shown in this study may contribute to the improvement of the attempt to control A. adamsii by prescribed burning (Yoshihara et al ., 2015; Koyama et al ., 2016). One of the concerns in prescribed burning is the increasing germination of some species by improving the light environment and breaking dormancy (Hatcher and Melander, 2003), implying that the germination of light-requiring seeds of A. adamsii would be induced by burning.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, pollen from Artemisia species is known as a cause of pollinosis in many parts of the world (D'Amato et al ., 2007; Tang et al ., 2015), and A. adamsii is also recognized as an allergen among Mongolians (Konagaya, 2013). Despite its harmfulness to livestock farming and human health, to date little effort has been made to control this species (but see Yoshihara et al ., 2015; Koyama et al ., 2016).…”

Section: Introductionmentioning

confidence: 99%

Germination characteristics and phytotoxic inhibition of germination in Artemisia adamsii, a low-palatability weed in the Mongolian steppe

et al. 2019

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Artemisia adamsii is a weed with low palatability to livestock and is thus recognized as an indicator of rangeland degradation in Mongolia. We investigated the germination characteristics of this species, phytotoxic suppression of its germination by its own residue, and the applicability of such germination behaviour to the control of this species. We also discussed the ecological consequence of these factors regarding the vegetation dynamics of the Mongolian steppe. Germination of A. adamsii was tested at different light and temperature conditions. Germination was also tested for A. adamsii and four native grassland species in the presence or absence of A. adamsii residue. Germination of A. adamsii was light-demanding and temperature-dependent. Artemisia adamsii residue showed autotoxic but sub-fatal suppression of germination, and the chemicals causing that suppression were shown to be aqueous and volatile. Phytotoxicity of A. adamsii residue on the germination of grassland species was low, except for in Artemisia frigida. The applicability of the observed sub-fatal autotoxicity for controlling this species was likely to be low, but the elucidated germination characteristics could contribute to developing a strategy for controlling this species. The autotoxicity in A. adamsii germination was suggested to have an ecological consequence that mediates species transition from A. adamsii to other species in degraded land occupied by A. adamsii. As low-palatability A. adamsii can act as a nurse plant of palatable species under grazing conditions, the invasion of A. adamsii into disturbed grasslands may facilitate the recovery of such grasslands in terms of improving pasture quality.

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“…Koyama et al. ) and to promote recovery of desirable species by artificial reseeding (Ronnenberg et al. ).…”

Section: Discussionmentioning

confidence: 99%

Detection of vegetation trends in highly variable environments after grazing exclusion in Mongolia

Kakinuma

Terui

Sasaki

et al. 2017

J Vegetation Science

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Aims: Environmental variability (e.g. in precipitation) has a large effect on vegetation dynamics, and this often makes it difficult to assess the recovery of vegetation after a disturbance. In this study, we assessed vegetation recovery trends in response to grazing exclusion while considering for the annual environmental variability.Location: Two regions with highly variable precipitation: a steppe near Mandalgobi, in Mongolia's Central Gobi province, and a desert steppe near Bulgan, in Mongolia's South Gobi province.Methods: Changes in vegetation were observed along grazing gradients at the above two sites, and vegetation thresholds were identified. We established reference plots in pre-threshold areas along the grazing gradients. We removed the impact of livestock grazing at various locations along the grazing gradients by establishing exclosures, and investigated vegetation from 2005 to 2013. We developed a smoothed hierarchical model within a Bayesian framework, and examined the effect of grazing exclusion on vegetation, focusing especially on the extent of grass cover recovery. In addition, we compared soil nutrient conditions in the reference plots and inside and outside each exclosure along the grazing gradients.Results: Temporal trends in the cover of perennial grass in each plot inside and outside of the exclosures largely coincided, irrespective of grazing intensity, and exclosure had no effect (Bulgan) or a negative effect (Mandalgobi) on vegetation recovery. Soil nutrient content was not significantly affected by exclosure at a given distance from the grazing source, but decreased significantly with decreasing grazing intensity. Thus, recovery of the land from a post-threshold state may not be apparent even after 9 yr of grazing exclusion in environments with highly variable precipitation. Conclusion:The effect of exclosure duration on perennial grass cover was limited, even after controlling for environmental variability. Once a vegetation threshold has been crossed, merely removing livestock from the landscape may not be sufficient for that area to recover.

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Response of degraded vegetation to introduction of prescribed burning or mowing management in a Mongolian steppe

Cited by 4 publications

References 43 publications

Non-utilization Is Not the Best Way to Manage Lowland Meadows in Hulun Buir

Non-utilization Is Not the Best Way to Manage Lowland Meadows in Hulun Buir

Germination characteristics and phytotoxic inhibition of germination in Artemisia adamsii, a low-palatability weed in the Mongolian steppe

Detection of vegetation trends in highly variable environments after grazing exclusion in Mongolia

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