Browsing by Author "Yang C"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Grazing activity increases decomposition of yak dung and litter in an alpine meadow on the Qinghai-Tibet plateau
    (Springer Nature Switzerland AG on behalf of the Royal Netherlands Society of Agricultural Science, 2019-11) Yang C; Zhang Y; Hou F; Millner JP; Wang Z; Chang S; Shang Z
    Aims: This study investigated the influences of herbivore grazing intensity and grazing season on decomposition and nutrient release of dung and litter, which aimed to improve our understandings of grazing affecting nutrient cycling in alpine meadows on the Qinghai-Tibetan Platean. Methods: A factorial design experiment comprising 3 grazing intensities (non-grazing, moderate grazing, and heavy grazing) and 2 grazing seasons (summer and winter), was applied to quantify the decomposition and chemistry of dung and litter in an alpine pasture using the litterbag technique. Litterbags were retrieved for analysis of mass loss and nutrient release with 180, 360, 540, and 720 days after placement. Results: Grazing activity accelerated the decomposition of dung and litter and increased nutrient release from dung and litter by increasing soil temperature compared with non-grazing pastures, whereas grazing season had no effect on decomposition. The decomposition time was shorter for dung than that for litter. Conclusions: Herbivores grazing benefited dung and litter decomposition and nutrient cycling directly by increasing soil temperature, which is likely to promote soil microbial activity due to low temperatures in alpine meadows, and indirectly through herbage ingestion and dung deposition which increase the organic debris concentration used for microorganisms growth and reproduction. This study provides insights into the mechanisms of grazing regulating nutrient cycling in alpine ecosystems.
  • Thumbnail Image
    Item
    Service performance assurance for small charities: Experiences from New Zealand
    (John Wiley and Sons Ltd, 2023-10) Xu G; Yang C
    Small charities in New Zealand are leading the way in service performance reporting and assurance, providing a unique context for exploring the existing practices and challenges. This study investigates small charities' assurance practices based on a content analysis of the performance reports of 120 small registered charities. We found that many small charities have complied with the assurance and reporting requirements of service performance information. However, their reported outcomes and outputs may not be significant, understandable, or sufficient. Auditors exhibit high tolerance towards these issues because of the subjectivity, auditability and materiality related to service performance information. Our study provides preliminary insights on service performance assurance for small charities, which presumably will continue evolving and hopefully improving. However, there is a concern that some charities and assurance practitioners view service performance assurance as a compliance exercise, which does little to improve accountability and transparency in the charity sector.