Interactive effects of short-term nitrogen enrichment and simulated grazing on ecosystem respiration in an alpine meadow on the Tibetan Plateau

Abstract

Both nitrogen (N) deposition and livestock grazing are important factors influencing species composition, soil nutrient availability, plant productivity and allocation pattern in grassland ecosystems. However, little is known about their interactive effects on alpine ecosystem carbon cycling process such as ecosystem respiration. In 2010 we started a long鄄term factorial experiment in an alpine meadow in Damxung County in northern Tibet, China, to examine the interactive effects of

Phosphorus Enrichment Increased Community Stability by Increasing Asynchrony and Dominant Species Stability in Alpine Meadow of Qinghai‐Tibet Plateau

“…Qinghai‐Tibet plateau alpine meadow located in the world's “third pole”, and is particularly sensitive to global climate change (Liu, Milne, et al., 2018; Yao et al., 2019). Despite the large quantities of stored organic N and P, the amount of plant‐available N and P accounts for only about 1% of the soil total‐N and P because of the restrictions on the decomposition of organic N and P imposed by the low temperatures in this region (Jiang et al., 2021; Yuan et al., 2020; Zhang et al., 2021; Zong & Shi, 2019), which limits plant growth (Wang et al., 2020; Zhang et al., 2020). Long‐term monitoring show that the warming rate of the Qinghai‐Tibet Plateau is twice that of the world (IPCC, 2021).…”

Advances in Meta-Analysis of the Effects of Grazing on Grassland Ecosystems in China

“…Additionally, microorganisms, such as bacteria and fungi, selectively use different forms of soil elements, with common sensitivities to ammonium and nitrate nitrogen [94]. A study conducted on simulation of the response of soil microbial carbon and Nitrogen to grazing found that grazing can reduce the carbon content of soil microorganisms, but it had no significant effect on the nitrogen content; moreover, grazing can reduce the activity of microorganisms at the end of growth [95]. Grazing also reduces the abundance of bacteria and fungi, increasing their ratio and thus increasing the carbon sequestration potential [24].…”

The Spatial Distribution and Driving Factors of Carbon Storage in the Grassland Ecosystems of the Northern Tibetan Plateau

“…That study also found that the northern plateau warming was the most significant in the whole plateau since 1961, while the warming in other regions was relatively weak (Guo and Wang, 2012). It also showed an asymmetric trend, in which winter warming was more obvious than summer warming (Zong and Shi, 2019). The response of the Northern Tibetan Plateau to global change will further affect the compositions of ecosystem communities (Klein et al, 2004), productivity (Klein et al, 2008), phenology (Dorji et al, 2013), and act on carbon storage.…”