Warming and nitrogen addition effects on bryophytes are species‐ and plant community‐specific on the eastern slope of the Tibetan Plateau

Sun, Shouqin; Wang, Genxu; Chang, Scott X.; Bhatti, Jagtar S.; Tian, Weihua; Luo, Jing

doi:10.1111/jvs.12467

Cited by 18 publications

(7 citation statements)

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“…Negative responses of bryophytes to experimental warming have also been reported in previous experimental studies ( Elmendorf et al 2012a ; Lang et al 2012 ; Sistla et al 2013 ). Cover richness in the present study began to decline more markedly after 7 years of warming, as also found in other shorter-term studies in Sweden and Tibet ( Alatalo et al 2015a ; Sun et al 2017 ). However, bryophyte responses to long-term warming are not always negative ( Van Wijk et al 2003 ; Hudson and Henry 2010 ; Bokhorst et al 2016 ).…”

Section: Discussionsupporting

confidence: 91%

“…The response of bryophytes to climate warming may also be context-specific, depending on potential competition from vascular plants ( Molau and Alatalo 1998 ; Jägerbrand et al 2012 ) and the origin of the sampled population, as shown in an ex situ experiment in Japan ( Jägerbrand et al 2014 ). Moreover, most studies provide summaries of cover/biomass of whole bryophyte communities ( Sistla et al 2013 ), while only a few have collected species-level data to study the impact on species or bryophyte diversity and richness ( Molau and Alatalo 1998 ; Jägerbrand et al 2003 ; Wahren et al 2005 ; Klanderud 2008 ; Klanderud and Totland 2008 ; Lang et al 2012 ; Alatalo et al 2014a , 2015a ; Sun et al 2017 ). Climate change can also have indirect effects on bryophyte communities.…”

Section: Introductionmentioning

confidence: 99%

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Bryophyte cover and richness decline after 18 years of experimental warming in alpine Sweden

et al. 2020

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Background and Aims Climate change is expected to affect alpine and Arctic tundra communities. Most previous long-term studies have focused on impacts on vascular plants, this study examined impacts of long-term warming on bryophyte communities. Methods Experimental warming with open-top chambers (OTCs) was applied for 18 years to a mesic meadow and a dry heath alpine plant community. Species abundance was measured in 1995, 1999, 2001 and 2013. Key results Species composition changed significantly from original communities in the heath, but remained similar in mesic meadow. Experimental warming increased beta diversity in the heath. Bryophyte cover and species richness both declined with long-term warming, while Simpson diversity showed no significant responses. Over the 18-year period, bryophyte cover in warmed plots decreased from 43% to 11% in heath and from 68% to 35% in meadow (75% and 48% decline, respectively, in original cover), while richness declined by 39% and 26%, respectively. Importantly, the decline in cover and richness first emerged after seven years. Warming caused significant increase in litter in both plant communities. Deciduous shrub and litter cover had negative impact on bryophyte cover. Conclusions We show that bryophyte species do not respond similarly to climate change. Total bryophyte cover declined in both heath and mesic meadow under experimental long-term warming (by 1.5-3°C), driven by general declines in many species. Principal response curve, cover and richness results suggested that bryophytes in alpine heath are more susceptible to warming than in meadow, supporting the suggestion that bryophytes may be less resistant in drier environments than in wetter habitats. Species loss was slower than the decline in bryophyte abundance, and diversity remained similar in both communities. Increased deciduous shrub and litter cover led to decline in bryophyte cover. The non-linear response to warming over time underlines the importance of long-term experiments and monitoring.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Bryophyte cover and richness decline after 18 years of experimental warming in alpine Sweden

et al. 2020

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“…Our finding that bryophyte cover expansion was suppressed in response to experimental warming is in line with decreasing bryophyte abundance in several warming experiments from across alpine and arctic sites (Walker et al 2006;Elmendorf et al 2012aElmendorf et al , 2012bSistla et al 2013;Sun et al 2017) as well as previous findings of a short term (four years) study from the same site (Klanderud and Totland 2005). In contrast, experimental warming increased bryophyte cover in a High Arctic site (Hudson and Henry 2010;Edwards and Henry 2016) and increased moss cover and sexual reproduction in an Antarctic site (Casanova-Katny et al 2016;Shortlidge et al 2017;Prather et al 2019), indicating that rising temperatures could be beneficial for bryophytes under moist conditions or in the absence of competition from vascular plants.…”

Section: Discussionsupporting

confidence: 84%

Ambient and experimental warming effects on an alpine bryophyte community

et al. 2022

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Alpine and arctic bryophytes have been found to respond negatively to climate change, but since they are often analysed as one functional group, there is limited knowledge on species-specific responses. In this study, we examine how nearly two decades of experimental warming by open top chambers (OTC) and ambient warming have affected the bryophyte community structure in an alpine Dryas octopetala heath in Finse, southwest Norway. In contrast to what we expected, we found that bryophyte abundance, species richness and evenness increased over time in the control plots, indicating a positive response to ambient warming. However, the increase in bryophyte abundance and cover was suppressed in experimentally warmed plots compared to control plots. Bryophyte community composition changed in a similar direction in response to both ambient and experimental warming. Acrocarpous mosses were not affected stronger by warming than pleurocarpous mosses, but individual species and taxa showed contrasting responses. Our study highlights the importance of studying bryophyte responses to environmental change, as well as combining long-term observations with experimental warming.

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“…The response of bryophytes to climate warming may also be context-specific, depending on potential competition from vascular plants (Molau and Alatalo 1998;Jägerbrand et al 2012) and the origin of the sampled population, as shown in an ex situ experiment in Japan (Jägerbrand et al 2014). Moreover, most studies provide summaries of cover/biomass of whole bryophyte communities (Sistla et al 2013), while only a few have collected species-level data to study the impact on species or bryophyte diversity and richness (Molau and Alatalo 1998;Jägerbrand et al 2003;Wahren et al 2005;Klanderud 2008;Klanderud and Totland 2008;Lang et al 2012;Alatalo et al 2014aAlatalo et al , 2015aSun et al 2017). Climate change can also have indirect effects on bryophyte communities.…”

Section: Introductionmentioning

confidence: 99%

Bryophyte cover and richness decline after 18 years of experimental warming in Alpine Sweden

Alatalo¹,

Jägerbrand²,

Erfanian³

et al. 2019

Preprint

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Background and Aims: Climate change is expected to affect alpine and Arctic tundra communities. Most previous studies have examined vascular plants, but this study examined potential impacts of long-term warming on bryophyte communities.Methods: Experimental warming with open-top chambers (OTCs) was applied for 18 years to a mesic meadow and a dry heath alpine plant community. Species abundance was measured in 1995, 1999, 2001 and 2013. Key results: Species composition changed significantly from the original communities in the heath, but remained similar in the mesic meadow. Experimental warming increased beta diversity in the heath community. Bryophyte cover and richness both declined with long-term warming, while diversity showed no significant responses. Over the 18-year period, bryophyte cover decreased from 43% to 11% in heath and from 68% to 35% in meadow (75% and 48% decline, respectively, in original cover), while richness declined by 39% and 26%, respectively. There was a strong negative relationship between deciduous shrub cover and bryophyte cover, but not bryophyte richness, in both plant communities. Conclusions: This study showed that bryophyte species do not all respond similarly to climate change. Total bryophyte cover declined in both dry heath and mesic meadow communities under long-term warming (by 1.5-3°C), driven by general declines in many species. Bryophytes in the heath community were more affected by long-term warming than those in the meadow community. Species loss was slower than the general decline in bryophyte abundance, as diversity remained similar in both communities. Increased litter fall with increasing deciduous shrub cover led to a steep decline in bryophyte cover and a smaller decrease in bryophyte richness.

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Warming and nitrogen addition effects on bryophytes are species‐ and plant community‐specific on the eastern slope of the Tibetan Plateau

Cited by 18 publications

References 54 publications

Bryophyte cover and richness decline after 18 years of experimental warming in alpine Sweden

Bryophyte cover and richness decline after 18 years of experimental warming in alpine Sweden

Ambient and experimental warming effects on an alpine bryophyte community

Bryophyte cover and richness decline after 18 years of experimental warming in Alpine Sweden

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