Seed rain and its relationship with above-ground vegetation of degraded Kobresia meadows

Shang, Zhanhuan; Yang, Shihai; Shi, Jianjun; Wang, Yanlong; Long, Ruijun

doi:10.1007/s10265-012-0498-2

Cited by 20 publications

(10 citation statements)

References 46 publications

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“…This, in association with increased anthropogenic activities due to rapid population growth, has been estimated to result in the degradation of over 30 % of the native alpine grasslands in the area during the last five decades (Shang and Long, 2007;Lu et al, 2013). As the grasslands have degraded, they have been gradually invaded by exotic weed species Shang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Does endophyte symbiosis resist allelopathic effects of an invasive plant in degraded grassland?

Bao

Saikkonen

Wang³

et al. 2015

Fungal Ecology

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Section: Introductionmentioning

confidence: 99%

Does endophyte symbiosis resist allelopathic effects of an invasive plant in degraded grassland?

Bao

Saikkonen

Wang³

et al. 2015

Fungal Ecology

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“…The relationship between the secondary seed dispersal system and soil seed bank was analysed according to the similarity coefficient and the percentage of importance value of common species (Shang, Yang, Shi, Wang, & Long, ). The Sørensen similarity coefficient was calculated as follows: SC = 2 w /( a + b ).…”

Section: Methodsmentioning

confidence: 99%

Secondary seed dispersal in hydro‐fluctuation belts and its influence on the soil seed bank

Chen

Zhang

et al. 2019

River Research & Apps

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The completion of the Three Gorges project altered the water level fluctuations from "summer submersion and winter exposure" to "summer exposure and winter submersion." The reverse seasonal flooding has dramatically changed both the time and duration of exposure and submergence of reservoir banks. Secondary seed dispersal by water is the primary method of dispersal in hydro-fluctuation belts. This study conducted field sampling and germination experiments to evaluate the effects of reverse seasonal flooding on species composition, diversity, and density of the secondary seed dispersal system and the soil seed bank, and their changes with elevation, in the Xiangzi River. The results indicate that that the secondary seed dispersal system and soil seed bank were associated with 42 and 50 plant species, respectively, and their average seed densities were 1,876.27 and 7,322.18 seeds/m 2 , respectively.The quantity of seeds from secondary seed dispersal accounted for 20.40% of the soil seed bank. The species life-form composition of both consisted mainly of annual and perennial grasses. Among these grasses, the dominant species in the secondary seed dispersal system were Cynodon dactylon and Paspalum distichum, whereas the dominant species in the soil seed bank were Solanum nigrum and Rumex dentatus. Due to the effects of reverse seasonal water level fluctuations, the species composition and quantity of the soil seed bank and secondary seed dispersal system largely exhibited similar spatial distribution characteristics, but some differences were observed. The species quantity, species diversity index, and seed density in the soil seed bank were the highest in the middle section of the hydro-fluctuation belt, followed by the top section and then the bottom section. Conversely, the species quantity, species diversity index, and seed density in the secondary seed dispersal system were highest at the top section, followed by the middle section and then the bottom section.

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“…Frequently, researchers have described pastures according to the extent to which they have become degraded, such as slightly, moderately, severely, or extremely degraded (Liu et al 2004b;Yuan and Zhou 2004;Zhou et al 2005;Ma 2007;Liu and Dong 2008), in order to ascribe restorative programs appropriate to the degree of degradation (Shang et al 2013), and an overall reduction in herbage mass and feeding value of herbage (Shang and Long 2007;Shang et al 2008Shang et al , 2013Gao et al , 2010Li et al 2013aLi et al , 2013bWen et al 2013). With changes in species composition, sward structure deteriorates and areas of bare soil increase, leading eventually to loss of soil structure and the possibility of soil erosion, all of which creates considerable challenges for grassland restoration .…”

Section: Restoration Of Degraded Grassland (A)mentioning

confidence: 99%

The sustainable development of grassland-livestock systems on the Tibetan plateau: problems, strategies and prospects

Gibb²,

et al. 2014

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Abstract. The Tibetan plateau is the source of most of the major rivers of Asia and has a huge impact on the livelihoods of the population, who have for centuries engaged in traditional herding practices. Sustainable management of the plateau is of critical importance not only for maintaining livelihoods but also because of its vital ecological function. The major problem of sustainable development in these grassland-livestock systems is the conflict between forage and livestock production. Despite considerable investment of manpower, material resources and capital over many years, attempts to resolve the problem have not been successful. The magnitude of conflict between forage and livestock is addressed by presenting 19 resolution strategies based on numerous research data. Each of these strategies is evaluated in terms of how it can be implemented, its potential benefits for livestock production, current progress and the requirement for further research. The 19 strategies have been divided into four topic categories, namely; grassland-forage, livestock, economy and market, societyculture, which cover the basic elements of sustainable development in this pastoral region. It is argued that improved planning and implementation of the proposed strategies must be based on the background investigation of natural and social status of the pastoral region. Particular attention needs to be given to genetic resources and technology in order to ensure the successful implementation of these proposals. In addition to expanding the use of 18 currently practiced strategies, the authors propose a further novel strategy of replacing the current intensive form of ecological migration with a model incorporating two semipermanent settlements. The objective of this novel strategy is to retain the nomadic element of pastoral husbandry while increasing the temporal and spatial scale of rotational stocking to reduce pasture degradation on the Tibetan plateau. It is argued that these proposals should be urgently incorporated into two national plans for the pastoral livestock industry, and the construction of an ecologically safe shelter zone on the Tibetan plateau, while ensuring a sustainable livelihood of its pastoral residents. Ensuring a successful implementation of these strategies in resolving the conflict between grassland and livestock, and promoting sustainable development on the Tibetan plateau, requires willing support at the level of national investment and policy commitment and from the herdsmen.

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Seed rain and its relationship with above-ground vegetation of degraded Kobresia meadows

Cited by 20 publications

References 46 publications

Does endophyte symbiosis resist allelopathic effects of an invasive plant in degraded grassland?

Does endophyte symbiosis resist allelopathic effects of an invasive plant in degraded grassland?

Secondary seed dispersal in hydro‐fluctuation belts and its influence on the soil seed bank

The sustainable development of grassland-livestock systems on the Tibetan plateau: problems, strategies and prospects

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