Digital archiving: what is involved?

Advances in technology have brought many useful tools to scholars, teachers, students, and others, but these advances have also bought significant threats. Digital information is not durable, and in the rush toward technological innovation, many in higher education have ignored the need for digital archiving and preservation

The influence of dietary and whole-body nutrient content on the excretion of a vertebrate consumer - Fig 2

<p>P Excretion (A) and N excretion (C) for the Guanapo (yellow) and Aripo (green) rivers. Size correction was conducted by dividing measured excretion by the fish’s weight, raised to the ¾ power to account for expected metabolic scaling. Low-P diet guppies had lower P excretion in both the Guanapo and Aripo. Both P excretion and N excretion were higher in HPred populations (orange) than LPred (blue), though this effect was only marginal in the Aripo for N excretion. Small differences in the x-axis placement within the High-P and Low-P diet groups do not reflect differences in diet quality, but are used to create separation to facilitate visual comparison of the data points.</p

Models for population-mean excretion N:P (log-transformed) versus population-mean whole-body N:P.

<p>Tables show key statistics on model fits and regression slope without diet (left) and with diet (right). Without accounting for diet, there is no correlation between whole-body N:P and excretion N:P. After accounting for the effect of diet, the overall model fit improves and a significant, negative correlation between whole-body N:P and excretion N:P is evident.</p

Population mean whole-body %P vs. whole-body %N for HPred (triangles) and LPred (circles) on the high-P diet (dark blue) and low-P diet (light blue), with standard errors represented in light gray lines.

<p>Symbols on the left correspond to the Guanapo guppies, and those on the right correspond to the Aripo guppies. Low-P diets reduced whole-body %P, as indicated by blue arrows. HPred guppies in both rivers had higher average whole-body N than LPred guppies (triangles vs. circles). On average, Guanapo guppies are lower %N and %P because they are higher %C.</p

Models of N excretion (A; size-corrected and log-transformed), P excretion (B; size corrected and log-transformed), and excretion N:P (C; log-transformed).

<p>All models include ‘river’ as a random effect, to account for differences between guppies from the Aripo and Guanapo Rivers in age, rearing environment, and background genetics. Variation in P excretion and excretion N:P suggests independent influences of diet and ancestral predation, while variation in N excretion suggests only an influence of predation. Model support for predation effects on N excretion was strong (removing predation LRT: df = 1, χ² = 6.68, p = 0.01). Model support for diet and predation effects on P excretion was also strong (removing predation LRT: df = 1, χ² = 10.2, p = 0.001; removing diet LRT: df = 1, χ² = 22.7, p < 0.001). Model support for diet effects on excretion N:P was strong (LRT: df = 1, χ² = 19.0, p < 0.001) but support for predation effects on excretion N:P was weak (LRT: df = 1, χ² = 2.35, p = 0.13).</p

Spatial pattern of dry rainforest colonizing unburnt Eucalyptus savanna

Abstract The spatial pattern of dry rainforest and savanna tree species was analysed in a 1.56-ha plot within an unburnt eucalypt savanna woodland in north Queensland, Australia. Rainforest colonization constituted only 1.3% of the basal area and mostly consisted of individuals less than 3 m high. The distribution of rainforest trees was highly clumped around the large savanna eucalypt trees. Ecological mechanisms generating the clumped distribution are discussed in light of evidence from this study and the literature. Herbaceous biomass was not reduced under trees, suggesting that relief from grass competition has not favoured rainforest colonization under tree crowns. Edaphic facilitation through nutrient enrichment under savanna tree crowns appears to be only minor on the moderate fertility soils of the area. The highly clumped pattern of colonizing dry rainforest may be a consequence of seeds dropped from birds roosting in savanna trees

Building a social materiality: spatial and embodied politics in organizational control

The purpose of this article is to explore the relevance of ‘materiality’ to understanding changing modes of control in organizational life. In doing this, materiality is not placed in a dualistic relationship with social relations. Rather a conceptualization of ‘social materiality’ is developed whereby social processes and structures and material processes and structures are seen as mutually enacting. In developing this concept of social materiality, I have drawn upon insights from three areas of social theory. These are studies of material culture, Lefebvre’s work on the ‘social production of space’, and sociological and phenomenological approaches to embodiment. The final section of the article explores how control and materiality are linked through spatial politics in one organizational case