A new study reports that an expansion of marine protected areas is needed to protect fish species that perform key ecological functions. According to investigators from the Wildlife Conservation Society and other organizations, previous efforts at protecting fish have focused on saving the largest numbers of species, often at the expense of those species that provide key and difficult-to-replace ecological functions.
Many vital ecological functions of ocean ecology are performed by fish species that also are food for millions of people. This study uncovers a significant problem: the world's most ecologically valuable fish communities are currently vulnerable and are being missed by the world's current network of marine protected areas.
If these tropical fish populations and the ecological services that they provide are to be ensured, say the authors, then the world's existing marine protected area network must be expanded. The paper appears in the current online edition of Ecology Letters.
"The recognition that all species are not the same and that some play more important and different roles in ocean ecology prompted this new investigation. The study was expected to identify regions with vulnerable fish populations, something that has been sidetracked by the past species richness focus," said Dr. Tim McClanahan, WCS Senior Conservationist and a co-author of the study.
"If you lose species with key functions, then you undermine the ability of the ocean to provide food and other ecological services, which is a wake up call to protect these vulnerable species and locations. Our analysis identifies these gaps and should provide the basis to accelerate the protection of ocean functions."
The authors of the study compiled a global database on tropical coastal fish populations from 169 locations around the world, focusing on species occurring in 50 meters of water or less. The team compared these data with distribution maps for 6,316 tropical reef fish species. Human threats such as fishing, pollution, and climate change were also included in the analyses.
What the authors found was that many areas with threatened but functionally important fish were found outside of existing marine protected areas. Also, the study examined other vulnerabilities such as taxonomic sensitivity (the number of threatened species in a fish assemblage or community) and functional sensitivity (the number of functions in danger of being lost because of external threats).
From a regional perspective, the analysis revealed that species richness "hotspots" are located in the Indo-Australian Archipelago and the Caribbean. Species-rich areas for short-ranged fish were located in peripheral zones in the Atlantic as well as the Indo-Pacific.
Areas of high vulnerability included the coastal waters of Chile, the eastern tropical Pacific, and the eastern Atlantic Ocean, areas where comparatively few fish species perform vital environmental functions with few or no redundancies or species that fill similar roles.
"Protecting the ecological services that fish populations provide for coastal habitats is as important as protecting wildlife species themselves," said Dr. Caleb McClennen, Executive Director of WCS's Marine Program. "This decision theory framework can help marine managers make recommendations about where to place marine protected areas that expand and protect the ocean's ability to provide key services."
The authors of the study are: Valeriano Parravicini of the Institut de Recherche pour le Développement, Domaine du Petit Arbois, and the University of Perpignan; Sébastian Villéger of the Laboratoire Ecologie des Systèmes Marins Côtiers; Tim McClanahan of the Wildlife Conservation Society; Jesus Ernesto Arias-González of the Laboratorio de Ecología de Ecosistemas de Arrecifes Carolinos; David R. Bellwood of James Cook University; Jonathan Belmaker of Tel Aviv University; Pascale Chabanet of the Institut de Recherche pour le Développement; Sergio R. Floeter of the Universidade Federal de Santa Catarina; Alan M. Friedlander of the University of Hawaii at Manoa; François Guilhaumon of the Laboratoire Ecologie des Systèmes Marins Côtiers; Laurent Vigliola of the Institut de Recherche pour le Développement; Michel Kulbicki of the Institut de Recherche pour le Développement; and David Mouillot of the Laboratoire Ecologie des Systèmes Marins Côtiers and James Cook University.
John Delaney | Eurek Alert!
Analytical lamps monitor air pollution in cities
26.05.2015 | Heraeus Noblelight GmbH
Nordic forests under pressure
26.05.2015 | International Institute for Applied Systems Analysis (IIASA)
Many joining and cutting processes are possible only with lasers. New technologies make it possible to manufacture metal components with hollow structures that are significantly lighter and yet just as stable as solid components. In addition, lasers can be used to combine various lightweight construction materials and steels with each other. The Fraunhofer Institute for Laser Technology ILT in Aachen is presenting a range of such solutions at the LASER World of Photonics trade fair from June 22 to 25, 2015 in Munich, Germany, (Hall A3, Stand 121).
Lightweight construction materials are popular: aluminum is used in the bodywork of cars, for example, and aircraft fuselages already consist in large part of...
Using ultrashort laser pulses, scientists in Max Planck Institute of Quantum Optics have demonstrated the emission of extreme ultraviolet radiation from thin dielectric films and have investigated the underlying mechanisms.
In 1961, only shortly after the invention of the first laser, scientists exposed silicon dioxide crystals (also known as quartz) to an intense ruby laser to...
The only professorship in Germany to date, one master's programme, one laboratory with worldwide unique equipment and the corresponding research results: The University of Würzburg is leading in the field of biofabrication.
Paul Dalton is presently the only professor of biofabrication in Germany. About a year ago, the Australian researcher relocated to the Würzburg department for...
Physicists have developed an innovative method that could enable the efficient use of nanocomponents in electronic circuits. To achieve this, they have developed a layout in which a nanocomponent is connected to two electrical conductors, which uncouple the electrical signal in a highly efficient manner. The scientists at the Department of Physics and the Swiss Nanoscience Institute at the University of Basel have published their results in the scientific journal “Nature Communications” together with their colleagues from ETH Zurich.
Electronic components are becoming smaller and smaller. Components measuring just a few nanometers – the size of around ten atoms – are already being produced...
Development and implementation of an advanced automobile parking navigation platform for parking services
To fulfill the requirements of the industry, PolyU researchers developed the Advanced Automobile Parking Navigation Platform, which includes smart devices,...
20.05.2015 | Event News
18.05.2015 | Event News
12.05.2015 | Event News
29.05.2015 | Life Sciences
29.05.2015 | Earth Sciences
29.05.2015 | Physics and Astronomy