An Experimental Study of the Effects of Sheep Grazing on Vegetation Change in a Species-Poor Grassland and the Role of Seedling Recruitment Into Gaps

Bullock, James M.; Hill, B. Clear; Dale, M. P.; Silvertown, Jonathan

doi:10.2307/2404445

Cited by 167 publications

(147 citation statements)

References 17 publications

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“…An instant grazing effect is the reduction of available forage quantity and plant species richness (Bullock et al 1994), whereas in this study, total plant biomass increased in the 3200-m post-grazing grassland soils, but decreased in the 3400-m post-grazing grassland soils (Table 2). For the belowground ecosystem, grazing imposed a common effect on soil microbial communities that predominated over site differences, as indicated by the decrease of the microbial C cycling gene abundance and the increase of microbial (Yang et al 2013).…”

Section: Discussioncontrasting

confidence: 54%

Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils

Wang

et al. 2016

Plant Soil

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Background and aims Livestock grazing is a widely practiced land-use regime that can impose lingering effects on global biogeochemical cycles. However, elucidating the mechanisms of related eco-processes, which are largely mediated by the microbial community, remains challenging. Methods Here, we collected soil samples from two Tibetan grassland sites subjected to grazing in winter followed by a 3-month recovery. We then evaluated Plant Soil

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Section: Discussioncontrasting

confidence: 54%

Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils

Wang

et al. 2016

Plant Soil

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“…; Bullock et al 1994;Morgan 1997). They are contradictory to results obtained by Hillier (1990) and Gross (1980).…”

contrasting

confidence: 56%

“…The gap concept belongs to one of the most important issues in plant ecology, particularly in seeking to explain the species coexistence, community structure and dynamics (van der Maarel 1988) or to elucidate plant regeneration processes (Grubb 1977;Gibson et al 1987;Mahdi and Law 1987;Coffin and Lauenroth 1988;Peart 1989;Mitchley 1990;Tilman 1994Tilman , 1997Bullock et al 1994;Edwards and Crawley 1999;Bullock 2000 and literature cited here;Davies 2002).…”

Section: Introductionmentioning

confidence: 99%

Do small-scale gaps in calcareous grassland swards facilitate seedling establishment?

Bąba

Kompała‐Bąba

2011

Acta Soc Bot Pol

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In this study we analyzed gaps originated in different seasons of the year vs. places of close vegetation in calcareous grasslands in terms of their suitability for seedling germination and establishment. Gaps, irrespective of the time of their origin, significantly promoted seedling emergence as compared with close swards. However, the season of gap creation influenced the rate of seedling germination/emergence. Seedlings occurred more frequently in autumn and spring gaps than in the summer ones. The highest mean number of seedlings and of their species were noted in autumn openings. However, the subsequent survival of seedlings in autumn gaps was low. On the contrary, in spring gaps juveniles occurred with the significantly highest mean number, frequency and species richness. The above results pointed to the positive, although very limited role of artificially created gaps as places favouring seedlings establishment.

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“…Silvertown & Smith 1989;Treweek 1990;Silvertown et al 1992;Bullock et al 1994;Watt et al 1996;Treweek et al 1997). The site was grazed by sheep and had basic (ca.…”

Section: Methodsmentioning

confidence: 99%

A phylogenetic approach to community assembly from a local species pool

Tofts

Silvertown

2000

Proc. R. Soc. Lond. B

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Ecological theory provides two contrasting predictions about the characteristics of the species combining to form communities. Classical competition theory states that they will be less similar than expected by chance, whilst the environmental structuring hypothesis states that they will be more similar. We investigated these predictions by applying phylogenetic methods of analysis (PICs) to a grassland community, examining species on the basis of their traits. At the scale of investigation most useful in making predictions about the presence and abundance of species (the community level), the species forming the community were more similar than would be expected by chance. The use of PICs resulted in a more sensitive test than if phylogeny had been ignored, allowing the detection of e¡ects that would otherwise have been overlooked or underestimated. Selected traits from the PICs analysis were used to develop a predictive model of community membership using discriminant analysis. This correctly identi¢ed species in the pool which were present in the community but failed to predict absences accurately, implying that dispersal limitation may operate in the community.

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An Experimental Study of the Effects of Sheep Grazing on Vegetation Change in a Species-Poor Grassland and the Role of Seedling Recruitment Into Gaps

Cited by 167 publications

References 17 publications

Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils

Evaluating the lingering effect of livestock grazing on functional potentials of microbial communities in Tibetan grassland soils

Do small-scale gaps in calcareous grassland swards facilitate seedling establishment?

A phylogenetic approach to community assembly from a local species pool

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