Matthew Edwards

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Recent discussions on scaling issues in ecology have emphasized that processes acting at a wide range of spatial and temporal scales influence ecosystems and thus there is no appropriate single scale at which ecological processes should be studied. This may be particularly true for environmental disturbances (e.g. El Niño) that occur over large geographic(More)
Keratoconus is a relatively common, bilateral, non-inflammatory corneal ectasia. The aetiology of this condition is probably multifactorial, or it represents the final common pathway for a variety of different pathological processes. Although a familial history is present only in a minority of cases, one of the major aetiological factors is certainly(More)
PURPOSE The purpose of this investigation was to estimate the population-based prevalence of renovascular disease (RVD), defined as > or = 60% diameter-reducing renal artery stenosis or occlusion, and to define its associations with age, gender, race, and other potential risk factors among participants in the Cardiovascular Health Study (CHS). METHODS The(More)
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Acute mesenteric ischemia secondary to arterial occlusion (AMI) remains a highly lethal condition. To examine recent trends in management and associated outcomes, we examined our institutional experience over a recent 10-year period. All patients treated for AMI between January 1990 and January 2000 were identified (76 patients, 77 cases) and their medical(More)
OBJECTIVE The emergence of endovascular repair (ER) for infrarenal abdominal aortic aneurysm (AAA) has provided surgeons with a new technique that should ideally improve patient outcomes. To more accurately characterize the advantages of ER versus traditional/open AAA repair (TOR), we compared the preoperative medical risk factors (PMRFs) and perioperative(More)
We examined the effects of shade from multiple kelp canopy layers (surface Macrocystis pyrifera canopy, understory Pterygophora californica canopy), both individually and in combination, on an understory algal assemblage in a central Californian kelp forest. The removal of both kelp canopies resulted in a dense recruitment of the understory brown alga(More)
Organisms occurring in environments subject to severe disturbance and ⁄ or periods of poor environmental quality that result in severe adult mortality can survive these periods by relying on alternate life stages that delay their development in a resistant state until conditions improve. In the northeast Pacific, the forest-forming giant kelp Macrocystis(More)