Extinction rate, historical population structure and ecological role of the Caribbean monk seal

The productivity and biomass of pristine coral reef ecosystems is poorly understood, particularly in the Caribbean where communities have been impacted by overfishing and multiple other stressors over centuries. Using historical data on the spatial distribution and abundance of the extinct Caribbean monk seal (Monachus tropicalis), this study reconstructs the population size, structure and ecological role of this once common predator within coral reef communities, and provides evidence that historical reefs supported biomasses of fishes and invertebrates up to six times greater than those found on typical modern Caribbean reefs. An estimated 233 000–338 000 monk seals were distributed among 13 colonies across the Caribbean. The biomass of reef fishes and invertebrates required to support historical seal populations was 732–1018 g m−2 of reefs, which exceeds that found on any Caribbean reef today and is comparable with those measured in remote Pacific reefs. Quantitative estimates of historically dense monk seal colonies and their consumption rates on pristine reefs provide concrete data on the magnitude of decline in animal biomass on Caribbean coral reefs. Realistic reconstruction of these past ecosystems is critical to understanding the profound and long-lasting effect of human hunting on the functioning of coral reef ecosystems

The Provision of Social Support to Injured Athletes: A Qualitative Analysis

Twelve seriously injured athletes were asked to describe the provision of eight functional types of support during their rehabilitation. NUD*IST (Nonnumerical Unstructured Data Indexing Searching and Theorizing) was used to organize the data. Overall, the provision of social support largely matched demand. Emotional and practical forms of support decreased with time, while varieties of informational support were increasingly received and preferred over time. The provision of informational and emotional support appeared to be dictated by four temporally sequential appraisals: injury severity, rehabilitation progress, recovery/readiness to return, and sports performance. Practical support in the form of personal assistance greatly depended upon the visibility of the injury and the mobility of the injured athlete. Physiotherapists, doctors, and other currently or previously injured athletes were most likely to provide informational support requiring expert medical knowledge, whereas coaches provided informational support requiring sport-specific expertise. Friends and family were the main source of emotional and practical support. The situational and temporal context of the provision of support is represented diagrammatically