Warming reduced flowering synchrony and extended community flowering season in an alpine meadow on the Tibetan Plateau

Chen, Yaya; Collins, Scott L.; Zhao, Yunpeng; Zhang, Tianwu; Yang, Xiangrong; An, Hang; Hu, Guorui; Xin, Chunming; Zhou, Juan; Sheng, Xiongjie; He, Mingrui; Zhang, Panhong; Guo, Zengpeng; Zhang, Hui; Li, Lanping; Ma, Miaojun

doi:10.1002/ecy.3862

Cited by 19 publications

(21 citation statements)

References 81 publications

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“…Thus, precipitation may not be the most important driver of plant reproductive phenology at the study site (Chen et al, 2023;Suonan et al, 2019). Moreover, Ganjurjav et al (2020) also found that early spring precipitation addition can offset the delaying effects of warming only in a dry year on the Tibetan Plateau, which was not the case in wet years.…”

Section: No Significant Phenological Response Of Alpine Plant Communi...mentioning

confidence: 93%

“…The other quadrat was used as a fixed quadrat to observe phenological events during the annual growing season (Figure S1). We monitored reproductive phenological traits every 6-7 days during the growing seasons (from late March to late October) of 2021 and 2022 (Chen et al, 2023;Sherry et al, 2007).…”

Section: Phenology Monitoringmentioning

confidence: 99%

“…alpine meadow, functional groups, nitrogen enrichment, plant community, precipitation, reproductive phenology, synchrony level is regulated by the phenological responses of early-and late-flowering species to warming (Chen et al, 2023;Prevey et al, 2019;Sherry et al, 2007). In addition, Meng et al (2017) found that altering the cover of early spring flowering species or mid-summer flowering species could mediate the response of community phenology to temperature changes.…”

Section: Introductionmentioning

confidence: 99%

“…the first flower budding dates, the F I G U R E 1 Conceptual diagrams shows how phenological changes of different species affect reproductive synchrony (red dashed arrows) in alpine plant communities. First, if the first flowering/fruiting date of early-flowering species (sedges, orange curve) and that of late-flowering species (forbs and grasses, blue curve) do not respond to N enrichment and precipitation changes (a) or respond in a similar direction and magnitude (b, c), reproductive synchrony will not change (Chen et al, 2023). However, if the first flowering/fruiting date of early-flowering species are more advanced than that of late-flowering species (d, e) or the first flowering/fruiting date of late-flowering species are more delayed than that of early-flowering species (d, f), reproductive synchrony will decrease (Chen et al, 2023;Sherry et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The different phenological changes in plant functional groups will disrupt the original temporal overlap of phenological events (i.e. synchrony within community) (Chen et al, 2023; Ovaskainen et al, 2013; Prevey et al, 2019), and events may become more divergent or more clumped in time (Diez et al, 2012). However, it remains unclear how different phenological changes caused by N enrichment, precipitation changes and their interaction will affect reproductive synchrony within a community.…”

Section: Introductionmentioning

confidence: 99%

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Different responses of functional groups to N addition increased synchrony and shortened community reproductive duration in an alpine meadow

et al. 2023

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Flowering and fruiting phenology of plants is sensitive to environmental cues, and changes in reproductive phenology of individual plant species under climate change have been widely reported. However, how species‐level phenological responses scale up to affect community‐level reproductive phenology patterns (synchrony and reproductive duration) are still unclear. An experiment on the effects of nitrogen (N) addition and precipitation changes on reproductive phenological traits of 52 species was conducted in an alpine meadow on the eastern Tibetan Plateau to determine the influence of the phenological response in different functional groups on community‐level reproductive phenology. N addition significantly delayed the onset date of reproductive phenology of sedges (early‐flowering species) and advanced the end date of reproduction of forbs (late‐flowering species). Meanwhile, N addition reduced the number of individuals involved in reproduction of sedges and forbs, but it increased that of grasses (late‐flowering species). Furthermore, N addition increased reproductive synchrony, delayed the onset and shortened the duration of reproductive phenology at the community level. However, precipitation changes and their interaction with N addition had no significant effect on reproductive phenology of the alpine plant community. Synthesis. These results suggested that differences in the direction and magnitude of response of different species to N enrichment lead to compression of reproductive duration at the community level, increasing the degree of overlap between reproductive events, which could change future species diversity, trophic interactions and productivity accumulation in alpine meadows on the Tibetan Plateau. Overall, knowledge of phenological responses from plant functional groups to the community level contributes to robust prediction and mechanistic understanding of community structure and function in response to future climate change.

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Section: No Significant Phenological Response Of Alpine Plant Communi...mentioning

confidence: 93%

Section: Phenology Monitoringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Different responses of functional groups to N addition increased synchrony and shortened community reproductive duration in an alpine meadow

et al. 2023

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Current progress and future prospects for understanding genetic diversity of seed plants in China

Xiong,

Zhao,

et al. 2024

Biological Diversity

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Genetic diversity represents the fundamental basis of biological variation within species, and is therefore the ultimate representation of biodiversity. Despite that all forms of diversity being defined by genomic differences, genetic diversity has received relatively less attention compared with species and ecosystem diversity. Here, we review recent literature and conclude that progress in understanding genetic diversity of seed plants, is strongly associated with advances in sequencing technology. We here present case studies to illustrate the application of genetic diversity for tracing crop domestication and delimiting species boundaries. Understanding genetic diversity is particularly critical for the field of conservation biology, and there is a clear shift to population‐level genetic studies to understand rare species. We then document additional factors that potentially influence genetic diversity, including climate change, habitat fragmentation, and species invasion. Finally, we identify current research limitations and propose directions for future studies. We highlight the need to develop broad‐scale genetic diversity knowledge, combined with other aspects of diversity to improve biodiversity conservation outcomes. We conclude that populating global databases with genomic‐scale sequence data for all species is an urgent and achievable goal now.

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Rodents mediate the relationship between seed rain, seed bank, and plant community with increased grazing disturbance

Guo,

Zhao,

Zhang

et al. 2024

Ecological Applications

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Seed rain and the soil seed bank represent the dispersal of seeds in space and time, respectively, and can be important sources of recruitment of new individuals during plant community regeneration. However, the temporal dynamics of seed rain and the mechanisms by which the seed rain and soil seed bank may play a role in plant community regeneration with increased grazing disturbance remain unclear. Seed rain, soil seed bank, aboveground vegetation, and rodent density were sampled along a grazing gradient in an alpine marsh on the eastern Tibetan Plateau. We described the temporal dynamics of seed dispersal using Bayesian generalized mixed models, and nonmetric multidimensional scaling and the structural equation model were used to examine the effects of grazing disturbance on the relative role of seed rain and soil seed bank on aboveground plant community regeneration. The temporal dynamics of seed rain changed from a unimodal to a bimodal pattern with increased grazing disturbance. Both species diversity and seed density of the seed rain and seed bank increased significantly with increased grazing disturbance. Increased grazing disturbance indirectly increased the similarity of composition between seed rain, seed bank, and aboveground plant community by directly increasing species diversity and abundance of aboveground plant community. However, increased grazing disturbance also indirectly decreased the similarity of seed rain, soil seed bank, and aboveground plant community by directly increasing rodent density. The similarity between seed rain and aboveground plant community was greater than that of the soil seed bank and aboveground plant community with increased grazing disturbance. Grazing disturbance spreads the risk of seed germination and seedling establishment by changing the temporal dynamics of seed dispersal. Plants (positive) and rodents (negative) mediated the role of seed rain and soil seed bank in plant community regeneration. The role of seed rain in plant community regeneration is higher than the seed bank in disturbed alpine marshes. Our findings increase our understanding of the regeneration process of the plant community, and they provide valuable information for the conservation and restoration of alpine marsh ecosystems.

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Warming reduced flowering synchrony and extended community flowering season in an alpine meadow on the Tibetan Plateau

Cited by 19 publications

References 81 publications

Different responses of functional groups to N addition increased synchrony and shortened community reproductive duration in an alpine meadow

Different responses of functional groups to N addition increased synchrony and shortened community reproductive duration in an alpine meadow

Current progress and future prospects for understanding genetic diversity of seed plants in China

Rodents mediate the relationship between seed rain, seed bank, and plant community with increased grazing disturbance

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