Litter fragment size and quality can have profound effects on ecosystem functioning and global biogeochemical cycling due to differential utilization by decomposers. Here we study the influence of these factors on decomposers from two guilds found in a tropical savannah stream: invertebrate shredders of the genus Phylloicus and microorganisms. Containers (16 × 16 × 12 cm, ~ 3L) with either Phylloicus (cases removed; N = 16) or stream water containing microorganisms (N = 16) were supplied with litter from the species Inga laurina, Maprounea guianensis, and Richeria grandis, and cut into disks of 18.7, 13.2, and 8.1 mm in diameter (3 sizes × 3 species = 9 disks per container). Relative decomposition was greater for smaller leaf disks and disks of higher quality in microbial‐only cultures. Phylloicus preferentially harvested large fragments for case building, also preferring the leaves of M. guianensis and R. grandis, likely due increased robustness for case formation. Microbial decomposition resulted in ~20% litter mass loss compared to 30% in Phylloicus (of which 8% was used for case building and 24% for food). Thus, changes to input litter size, such as a decrease in leaf size after drought, may alter microbial decomposition and potentially affect shredder populations by limiting the availability of casing material.

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Introduction: This article discusses the path of healthcare associated infections (HAI) indicators in the intensive care unit (ICU) of a public teaching hospital in Belo Horizonte, Minas Gerais, Brazil, after certain change in its nursing staff: pair of nursing caregivers. The model of a pair of caregivers consists in assigning one nurse and one nursing technician for every three patients. The indicators analyzed were infection related to central venous catheters (CVCs), the risk of HAI, turnover, and absenteeism. Objective: The objective of this paper is to understand the impact of the restructuring of the nursing staff in Human Resources and on the rate of infection in the ICU. Methods: As for methods, it is a qualitative and descriptive research carried out as a case study. Results: The results have shown that the risk of HAIs significantly increased after the change in staffing, but the density of vascular access infection associated with CVCs was drastically reduced. The results of turnover of nursing technics decreased and the turnover of nurses increased while the absenteeism of the nursing team decreased after the change. The interviews revealed that there was a gain at the care due to the change. Conclusion: As a conclusion, the results of the study have shown that the proposed nursing model caused a care gain, once the interviews exposed that and indicator directly related to nursing team care (infection associated with CVCs) decreased.