A multi‐species approach to habitat restoration may boost the key processes (e.g. recruitment) that enable foundation species to overcome barriers to recovery. Natural systems tend to be formed by co‐occurring foundation species whose synergy drives ecological productivity and resilience beyond that of single foundation species. Yet, restoration remains primarily a single‐species focus enterprise where positive interactions are seldom incorporated into planning. A multi‐species approach that prioritizes species combinations that create emergent properties for their persistence may accelerate habitat recovery and the success of restoration programmes.
On the largest oyster reef restoration project in the Southern Hemisphere, we experimentally established canopy‐forming kelp to test whether they could accelerate the natural recruitment of oysters to substrata monopolized by turf‐forming algae. To understand whether facilitation of oysters was a function of the kelp themselves (biological facilitation) or the physical environment they create (physical facilitation), we compared recruitment to the understorey of living kelp and synthetic kelp mimics.
Despite observing high density oyster recruitment to the turf‐free underside of reef boulders (8,300 oysters/m2), turf algae appeared to inhibit oyster recruitment to the exposed surfaces of the reef, limiting their capacity to grow and form complex, three‐dimensional habitat.
Transplanted kelp, whether living or synthetic kelp mimics, effectively reduced the biomass of turf and enhanced oyster recruitment, creating turf‐free substrata on the upper reef surfaces with up to 26 times the oyster recruitment than turf‐covered substrata.
Synthesis and applications. Our results provide proof‐of‐concept that incorporating the transplant of canopy‐forming kelp to reefs constructed to restore oysters is not only achievable, but may be imperative to successfully restore oyster reefs in turf‐dominated systems. Kelp transplants suppressed the turf algae that otherwise excluded oysters from the reef surface, effectively shifting the competitive advantage toward oyster recovery by maintaining bare substrata for oyster recruitment. By demonstrating that a multi‐species approach to restoration accelerates the recovery of a restored habitat, we emphasize the value of incorporating the multi‐species concept into restoration planning.
Summary
Our case is that of a 67‐year‐old man who presented with a blistering, scarring eruption at sites of trauma. Histologically the blistering was subepidermal. IgG and C3 were present at the basement membrane zone. Electronmicroscopy demonstrated bulla formation to be beneath the basal lamina and that it contained amorphous electron‐dense material. These clinical and investigational findings are consistent with a diagnosis of epidermolysis bullosa acquisita (EBA). The patient also had pulmonary tuberculosis which again highlights the association between EBA and diseases in which the immune system is compromised.
Preliminary findings in Phase I of this project summarized here established that members of four subsets of humanities scholars in the visual arts demonstrated strong similarities in their image retrieval requirements. Therefore the proposed methodology in Phase II is intended to broaden the scope of this ongoing study by examining both image and text retrieval within the domain. The primary objective of this project is aimed at contributing toward the development of a specific information-seeking behavioral and processing model for this community.Résumé : Les résultats préliminaires de la phase I de ce projet sont résumés ici et établissent que les membres de quatre groupes d'universitaires du domaine des arts visuels montrent de fortes similarités dans leurs besoins en repérage d'images. Pour cette raison, la méthodologie proposée dans la phase II est censée élargir la portée de la présente étude par l'examen du repérage de l'image et du texte au sein de ce domaine. L'objectif préliminaire de ce projet vise le développement d'un modèle spécifique du comportement et des procédures de recherche informationnelle de cette communauté.
is a reporter for Bloomberg News in Washington, D.C., where she covers health-care regulation and the U.S. Food and Drug Administration. She earned her Bachelor of Science degree in journalism from Northwestern University. The ideas and viewpoints expressed in this commentary are those of the author and do not necessarily represent any policy, position, or program of the NCCN.
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