Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe

Wang, Zihan; Lv, Shijie; Han, Guodong; Wang, Zhongwu; Li, Zhiguo; Ren, Haiyan; Wang, Jing; Sun, Haijie; Zhang, Guogang

doi:10.1186/s12870-022-03712-8

Cited by 7 publications

(5 citation statements)

References 43 publications

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“…With the increase of grazing intensity, the correlation between density and standing crop of S. breviflora decreases, and the phenomenon of plant cluster fragmentation occurred (Lv et al, 2020 ). With the increase of grazing intensity, the spatial heterogeneity of density and height of A. frigida decreased (Wang et al, 2022 ). In this study, C. songorica as the dominant species in the desert steppe, with the increase of grazing intensity, the phenomenon of plant cluster fragmentation appeared.…”

Section: Discussionmentioning

confidence: 99%

Heavy grazing causes plant cluster fragmentation of sparse grasses

Wang,

Lv,

Liu

et al. 2023

Ecology and Evolution

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Cleistogenes songorica, as a clustered grass, is the main grassland flora of the Stipa breviflora desert grassland. Some studies have shown that the constructive species of S. breviflora (sparse cluster type) is prone to cluster fragmentation; however, research on C. songorica is relatively rare. Then will the C. songorica plant population (dense cluster type) also have cluster fragmentation under the influence of intense grazing? To answer this question, we used variance analysis and geo‐statistical methods. The spatial distribution of C. songorica in S. breviflora desert steppe in Inner Mongolia was measured under four grazing intensities (no grazing, CK, 0 sheep·ha−1·half year−1; light grazing, LG, 0.93 sheep·ha−1·half year−1; moderate grazing, MG, 1.82 sheep·ha−1·half year−1; and heavy grazing, HG, 2.71 sheep·ha−1·half year−1) and four scales (10 cm × 10 cm, 20 cm × 20 cm, 25 cm × 25 cm, 50 cm × 50 cm). We then analyzed C. songorica whether fragmentation was present. The results showed that increased grazing intensity is associated with increased density and decreased height, coverage, and standing crop of C. songorica. The spatial distribution of C. songorica was affected by structural factors, and spatial heterogeneity decreased with increased spatial scale. With increased grazing intensity and spatial scale, the patch area of C. songorica gradually increased and tended toward band distribution. In summary, increased grazing intensity and spatial scale led to weakened heterogeneity of C. songorica spatial distribution and increased consistency.

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Section: Discussionmentioning

confidence: 99%

Heavy grazing causes plant cluster fragmentation of sparse grasses

Wang,

Lv,

Liu

et al. 2023

Ecology and Evolution

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“…The latent phase of plant ontogeny is represented by fruits. In A. frigida, the fruit seeds contain EOs that act as anti-attractants for herbivore feeding, inhibitors of seed germination, sprout growth and reproduction of other species [21,22]. The same components identified in the EOs obtained from the aboveground parts are also found in the composition of the fruit EOs.…”

Section: Composition Of Essential Oils Of a Frigida During Ontogenesi...mentioning

confidence: 92%

Essential Oils of Artemisia frigida Plants (Asteraceae): Conservatism and Lability of the Composition

Zhigzhitzhapova,

Dylenova,

Zhigzhitzhapov

et al. 2023

Plants

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Plants of arid regions have adapted to harsh environments during the long span of their evolution and have developed a set of features necessary for their survival in water-limited conditions. Artemisia frigida Willd. (Asteraceae) is a widely distributed species possessing significant cenotic value in steppe ecosystems due to its high frequency and abundance. This study examines different patterns of formation of essential oil composition in A. frigida plants under the influence of heterogeneous factors, including climate and its integral characteristics (HTC, Cextr, SPEI and others). The work is based on the results of our research conducted in Russia (Republic of Buryatia, Irkutsk region), Mongolia, and China, from 1998 to 2021. A total of 32 constant compounds have been identified in the essential oil of A. frigida throughout its habitat range in Eurasia, from Kazakhstan to Qinghai Province, China. Among them, camphor, 1,8-cineol and bornyl acetate are the dominant components, contained in 93–95% of the samples. Among the sesquiterpenoids, germacrene D is the dominant component in 67% of the samples. The largest variability within the composition of the essential oils of A. frigida is associated with significant differences in the climatic parameters when plants grow in high-altitude and extrazonal conditions.

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“…1). Artemisia frigida and A. scoparia are pioneer plants at sites disturbed by grazing and also occur in the early recovery stages of abandoned land that underwent severe soil erosion (Jiao et al 2013;Wang et al 2022). Both species have high seed yields and small seeds (A. frigida: 0.106 g and A. scoparia: 0.047 g) that are easily propagated by wind and are then buried into soils (Yi et al 2019).…”

Section: Study Species: Artemisia Frigda and A Scopariamentioning

confidence: 99%

Relationship between genetic and phenotypic variations in natural populations of perennial and biennial sagebrush

Khurelpurev,

Grossmann,

Herklotz

et al. 2024

Preprint

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Plant responses to environmental heterogeneity depend on life-history traits, which could relate to phenotypical and genetic characteristics. To elucidate this relationship, we examined the variation in population genetics and functional traits of short- and a long-lived Artemisia species that are co-occurring in the steppes of Mongolia. Mongolian steppes represent stressful, waterlimited habitats demanding phenotypic modifications in the short term and/or genetic adaptation in the long term. However, detailed knowledge is missing about both plant phenotypic and genetic differentiation and their inter-relationships in temperate grasslands. Here, we investigated 21 populations of the widely distributed subshrub A. frigida and the herbaceous biennial A. scoparia. Genetic variation was assessed with newly developed Simple Sequence Repeats (SSRs) markers. Functional trait data was collected from each individual, and data on environmental variables was collected for each population. We detected significantly higher genetic diversity in the biennial species (H E =0.86) compared to the perennial (H E =0.79). For both species, the largest share of genetic variation was partitioned within populations (96%). Population genetic structure in the biennial A. scoparia was weak, while the perennial A. frigida showed some spatial genetic structure, which was impacted by geographical factors, soil nutrients, and precipitation. Morphology-related functional traits (i.e., plant height) were predominantly associated with environmental variables rather than with genetic variation, while physiology-related traits (i.e., specific leaf area) were partly genetically determined.

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Heavy grazing reduced the spatial heterogeneity of Artemisia frigida in desert steppe

Cited by 7 publications

References 43 publications

Heavy grazing causes plant cluster fragmentation of sparse grasses

Heavy grazing causes plant cluster fragmentation of sparse grasses

Essential Oils of Artemisia frigida Plants (Asteraceae): Conservatism and Lability of the Composition

Relationship between genetic and phenotypic variations in natural populations of perennial and biennial sagebrush

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