Interacting effects of temperature and precipitation on climatic sensitivity of spring vegetation green-up in arid mountains of China

Du, Jun; He, Zhibin; Piatek, K.; Chen, Longfei; Lin, Peifei; Zhu, Xi

doi:10.1016/j.agrformet.2019.02.008

Cited by 95 publications

(57 citation statements)

References 48 publications

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“…Warming is expected to advance the onset of plant growth and to delay senescence of plant growth in many ecosystems (Ge et al., 2015; Menzel et al., 2006). However, the effects of temperature on plant phenology are strongly controlled by soil moisture in some arid or semi‐arid grasslands (Du et al., 2019; Tao et al., 2020). We also confirmed that effects of warming and precipitation addition on plant phenology were dependent on temperature and water condition.…”

Section: Discussionmentioning

confidence: 99%

Phenological changes offset the warming effects on biomass production in an alpine meadow on the Qinghai–Tibetan Plateau

Ganjurjav

Gornish

et al. 2020

Journal of Ecology

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Phenology is an important indicator of plant responses to environmental changes and is closely correlated with biomass production. However, how changes in phenological events affect plant biomass production when exposed to changing temperature and precipitation remain unclear. We conducted a 4‐year manipulative experiment of warming and precipitation addition to explore phenology–biomass interactions under climate change in a dry alpine meadow on the central Qinghai–Tibetan Plateau from 2015 to 2018. In dry and warm years, warming delayed phenology and precipitation addition advanced them. Warming decreased the biomass of Kobresia pygmaea in 2018 and the biomass of Poa pratensis in 2015, 2017 and 2018. However, precipitation addition significantly increased the biomass of Poa pratensis and Potentilla multifida in most of the experimental years. Phenological changes regulated the responses of biomass to treatments. Specifically, delay of green up of P. pratensis and delay of withering of K. pygmaea induced by warming can increase biomass production, but it can be offset by the direct negative effects of warming on biomass. Synthesis. Here we show how warming‐induced drought tend to decrease the biomass production of graminoids and the negative effects of warming on the biomass of P. pratensis and K. pygmaea were partially offset by green up postponement and withering postponement respectively. Our results highlights phenology is a crucial regulator for biomass production under climate change. Hence, both direct and indirect effects of warming and precipitation addition on phenology and biomass cannot be ignored when predicting biomass responses to climate change.

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Section: Discussionmentioning

confidence: 99%

Phenological changes offset the warming effects on biomass production in an alpine meadow on the Qinghai–Tibetan Plateau

Ganjurjav

Gornish

et al. 2020

Journal of Ecology

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“…Precipitation has no obvious effects on SOS or EOS at the regional level. A significant interaction between temperature and precipitation indicates the complex mechanisms of phenological responses to climate change [82].…”

Section: Relationships Between Phenology Metrics and Climatic Factorsmentioning

confidence: 99%

Forest Phenology Dynamics to Climate Change and Topography in a Geographic and Climate Transition Zone: The Qinling Mountains in Central China

Xia

Qin

Feng

et al. 2019

Forests

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Forest ecosystems in an ecotone and their dynamics to climate change are growing ecological and environmental concerns. Phenology is one of the most critical biological indicators of climate change impacts on forest dynamics. In this study, we estimated and visualized the spatiotemporal patterns of forest phenology from 2001 to 2017 in the Qinling Mountains (QMs) based on the enhanced vegetation index (EVI) from MODerate-resolution Imaging Spectroradiometer (MODIS). We further analyzed this data to reveal the impacts of climate change and topography on the start of the growing season (SOS), end of the growing season (EOS), and the length of growing season (LOS). Our results showed that forest phenology metrics were very sensitive to changes in elevation, with a 2.4 days delayed SOS, 1.4 days advanced EOS, and 3.8 days shortened LOS for every 100 m increase in altitude. During the study period, on average, SOS advanced by 0.13 days year−1, EOS was delayed by 0.22 days year−1, and LOS increased by 0.35 day year−1. The phenological advanced and delayed speed across different elevation is not consistent. The speed of elevation-induced advanced SOS increased slightly with elevation, and the speed of elevation-induced delayed EOS shift reached a maximum value of 1500 m from 2001 to 2017. The sensitivity of SOS and EOS to preseason temperature displays that an increase of 1 °C in the regionally averaged preseason temperature would advance the average SOS by 1.23 days and delay the average EOS by 0.72 days, respectively. This study improved our understanding of the recent variability of forest phenology in mountain ecotones and explored the correlation between forest phenology and climate variables in the context of the ongoing climate warming.

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“…Furthermore, the precipitation sensitivity of spring vegetation green-up is greater in mid-altitude grasslands than low-altitude forests and high-altitude deserts (He et al, 2018). The temperature sensitivity of spring phenology increases with increasing elevation, for the high-altitude plant occupies cold and wet climate when compared with relatively warm and dry climate at low altitudes (Du et al, 2019). Such phenological responses to temperature and precipitation along elevational gradients indicate potential shifts in the climatic sensitivity of NPP under different biomes and altitudes.…”

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confidence: 99%

Elevational differences in the net primary productivity response to climate constraints in a dryland mountain ecosystem of northwestern China

Wang

2020

Land Degrad Dev

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Dryland mountain ecosystems regulate global terrestrial carbon cycling and show high sensitivity to climate variability. The Qilian Mountains (QLMs) typify dryland mountain ranges in northern temperate belts and offer fundamental ecosystem services including forage production and water conservation. However, dominant controls on the interannual trend and variability of net primary productivity (NPP) in this region are unknown. Thus, we examined magnitude and direction of the NPP trend and quantified NPP sensitivity to temperature and precipitation under different biomes and altitudes using ground and remote sensing data. Our results showed that 12% of the QLMs had a reversed NPP trend from increasing to decreasing from 2000 to 2016, particularly in the western and southern parts, where NPP reductions were related to precipitation deficits. About 34% of the QLMs showed accelerated or persistent increasing NPP trends, mainly from the mid‐altitude between 3,100 and 4,300 m. The growth rate of NPP was higher in deserts and grasslands than in forests and increased in deserts but decreased in forests and grasslands with increasing elevation. Precipitation showed a stronger effect on the interannual variability in NPP than temperature did. The temperature sensitivity of NPP was similar along elevation gradients in forest steppes but decreased with increasing elevation in alpine deserts. The precipitation sensitivity of NPP reached highest in shrubby meadows when compared with coniferous forests and alpine deserts. This research provides new insights into climate controls of the NPP over the QLMs and to present drought as a growing threat to shrubby meadows and alpine deserts.

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Interacting effects of temperature and precipitation on climatic sensitivity of spring vegetation green-up in arid mountains of China

Cited by 95 publications

References 48 publications

Phenological changes offset the warming effects on biomass production in an alpine meadow on the Qinghai–Tibetan Plateau

Phenological changes offset the warming effects on biomass production in an alpine meadow on the Qinghai–Tibetan Plateau

Forest Phenology Dynamics to Climate Change and Topography in a Geographic and Climate Transition Zone: The Qinling Mountains in Central China

Elevational differences in the net primary productivity response to climate constraints in a dryland mountain ecosystem of northwestern China

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