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Productivity limits and potentials of the principles of conservation agriculture- TERA

Here we conduct a global meta-analysis using 5,463 paired yield observations from 610 studies to compare no-till, the original and central concept of conservation agriculture, with conventional tillage practices across 48 crops and 63 countries. Overall, our results show that no-till reduces yields, yet this response is variable and under certain conditions no-till can produce [...]

Predicting climate-driven regime shifts versus rebound potential in coral reefs- TERA

Climate-induced coral bleaching is among the greatest current threats to coral reefs, causing widespread loss of live coral cover1. Conditions under which reefs bounce back from bleaching events or shift from coral to algal dominance are unknown, making it difficult to predict and plan for differing reef responses under climate change2. Here we document and [...]

Saddleback giant tortoises making comback on Galapagos island- TERA

For the first time in 150 years and after more than 50 years of conservation efforts, the number of saddleback giant tortoises (Chelonoidis ephippium) seems set to recover unaided on Pinzón Island in the Galapagos archipelago. Rats, early whalers and pirates almost wiped out these ancient creatures. doi: http://dx.doi.org/10.1038/517271a

Managing climate-induced resettlement

Papua New Guinea, China and Vietnam have already relocated communities that were vulnerable to flooding. More than a dozen developing countries, including Uganda and Bhutan, have submitted national adaptation plans to the United Nations that involve population resettlement. Sea-level rise this century threatens the cultural and national survival of several low-lying island nations in the [...]

Climate change decouples oceanic primary and export productivity and organic carbon burial- TERA

Understanding responses of oceanic primary productivity, carbon export, and burial to climate change is essential for model-based projection of biological feedbacks in a high-CO2 world. Here we compare estimates of productivity based on the composition of fossil diatom floras with organic carbon burial off Oregon in the Northeast Pacific across a large climatic transition at [...]

Should we “reef” obsolete oil platforms?- TERA

Claisse et al. (1) show that not only do oil platforms produce fish, but they do so at a rate far greater than our most productive marine habitats, such as coral reefs and mangroves. Because this information may be used to justify increased “reefing” of obsolete oil infrastructure worldwide, we offer some caveats. doi: http://dx.doi.org/10.1073/pnas.1422274112

Air Force Turns a Keen Eye on Space Junk

An estimated 500,000 pieces of space junk—old satellites, rocket parts, debris from collisions—swarm in orbit around Earth. Much of it is potentially deadly: NASA officials say anything larger than 1 centimeter in diameter poses a threat to the International Space Station. But current tracking systems can generally only watch objects 10 cm or larger, and [...]

Evolutionary tipping points in the capacity to adapt to environmental change- TERA

Environmental variation is becoming more frequent and unpredictable as a consequence of climate change, yet we currently lack the tools to evaluate the extent to which organisms may adapt to this phenomenon. Here we develop a model that explores these issues and use it to study how changes in the timescale and predictability of environmental [...]

Chelation technology: a promising green approach for resource management and waste minimization- TERA

Chelation technology, a modern research trend, has shown its potential to develop sustainable technology for metal extraction from various metal-contaminated sites. However, the interaction mechanism of ligands with metals and the ecotoxicological risk associated with the increased bioavailability of heavy metals due to the formation of metal–chelant complexes is still not sufficiently explicated in the [...]

Recovery and Separation of Rare Earth Elements Using Salmon Milt- TERA

As strange as it sounds, fish sperm could be a key ingredient for extracting and recycling rare earth elements (REEs) from ore and materials such as magnets and electronic waste. The Japanese team developed a process that uses salmon sperm, or milt – a delicacy in Japan – to recover and separate REEs in aqueous solution, which [...]