Understanding the large-scale processes that shape distributions of species diversity is a long-standing challenge in ecology and can also help set conservation priorities. Regions with highly diverse or unique organisms may be targeted for conservation, but how such a region acquired its species could affect how they should be protected.
Without near-perfect records of where organisms have occurred throughout the past, it can be difficult to determine the processes underlying diversity patterns. In the absence of such detailed information, regions with high diversity or many unique species are often assumed to be hotbeds of species origination, but a new theory demonstrates that such places could instead result from the immigration of species. This theory, outlined in an article to appear in the June 2005 issue of The American Naturalist, also shows how combining the ages of species, determined from the fossil record, with information on where those species currently live can give insight into the past processes that have shaped diversity. Application of the theory to clams, mussels, and other marine bivalves shows that the polar oceans have had higher rates of immigration and extinction and much lower rates of origination than have the tropical and temperate oceans.
This example underscores the importance of considering not just species origination but also extinction and dispersal when testing hypotheses about the geographic distributions of organisms.
Carrie Olivia Adams | EurekAlert!
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In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
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Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
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An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
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