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Luciano Ferrer

De novo origins of multicellularity in response to predation - 0 views

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    "The transition from unicellular to multicellular life was one of a few major events in the history of life that created new opportunities for more complex biological systems to evolve. Predation is hypothesized as one selective pressure that may have driven the evolution of multicellularity. Here we show that de novo origins of simple multicellularity can evolve in response to predation. We subjected outcrossed populations of the unicellular green alga Chlamydomonas reinhardtii to selection by the filter-feeding predator Paramecium tetraurelia. Two of five experimental populations evolved multicellular structures not observed in unselected control populations within ~750 asexual generations. Considerable variation exists in the evolved multicellular life cycles, with both cell number and propagule size varying among isolates. Survival assays show that evolved multicellular traits provide effective protection against predation. These results support the hypothesis that selection imposed by predators may have played a role in some origins of multicellularity."
Luciano Ferrer

Sufficiency: Moving beyond the gospel of eco-efficiency | Friends of the Earth Europe - 0 views

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    "To revert the current ecological overshoot and build a sustainable society, we have to collectively engage in changing our economic model. "Sufficiency: moving beyond the gospel of eco-efficiency" suggests introducing hard limitations to unsustainable trends-in particular to overconsumption-and putting emphasis on distributional justice. Seven chapters written by sustainability and economics experts plus a foreword by Janez Potočnik (Co-chair of the International Resource Panel and former European Commissioner for the Environment) shed light on different angles of sufficiency and formulate concrete recommendations to EU policy makers. The booklet ends with a discussion of several eco-social policies that can start the transition towards an "economics of enough". Many new ideas for an economic paradigm shift have been developed and discussed at the academic and grassroots levels in recent years. The aim of this booklet is to build on a rich body of knowledge and bring these ideas to the attention of engaged citizens and policy makers in order to advance the debate on how to implement sufficiency."
Luciano Ferrer

¿Qué sucedería si los paneles fotovoltaicos fuesen gratuitos? - 0 views

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    "El pasado 25 de septiembre, Nate Hagens envía un mensaje al grupo de reflexión sobre la transición energética que dirige Ugo Bardi, llamado Energy Transition, donde existe una gran mayoría de personas que creen en una solución, al menos parcial, para el futuro de la Humanidad, con energías renovables. Lo que ahora transcribo a continuación, traducido al castellano, para los lectores de Crisis Energética y de la revista 15/15\15, con el permiso de Nate Hagens y de Ugo Bardi es el intercambio de opiniones que se ha producido. Espero con ello contribuir a profundizar el debate sobre nuestro futuro energético, donde sigue habiendo toda una amplia gama de posturas, desde los muy pesimistas y apocalípticos hasta los muy optimistas y creyentes en las modernas energías renovables, pasando por una variedad de posturas intermedias, que moderan ambos extremos. El intercambio, para resumirlo en lo posible, comienza con una comunicación de Nate a Ugo en el correo de energytransition, que Ugo o el grupo responden entre líneas como sigue:"
Luciano Ferrer

Inside the new economic science of capitalism's slow-burn energy collapse, by @NafeezAhmed - 0 views

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    "New scientific research is quietly rewriting the fundamentals of economics. The new economic science shows decisively that the age of endlessly growing industrial capitalism, premised on abundant fossil fuel supplies, is over. The long-decline of capitalism-as-we-know-it, the new science shows, began some decades ago, and is on track to accelerate well before the end of the 21st century. With capitalism-as-we-know it in inexorable decline, the urgent task ahead is to rewrite economics to fit the real-world: and, accordingly, to redesign our concepts of value and prosperity, precisely to rebuild our societies with a view of adapting to this extraordinary age of transition."
Luciano Ferrer

Colapso del capitalismo global y transiciones hacia sociedades ecomunitarias - 0 views

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    "En este trabajo abordamos la crisis ambiental en primer lugar. Para ello caracterizamos la menor disponibilidad energética y de materiales, el cambio climático y la disfunción de muchos ecosistemas. Después justificamos que dicha crisis ambiental (hibridada con las crisis económica y social) están conllevando el colapso de nuestro orden socioeconómico. Ante esto, no hay alternativas y la tecnología no podrá solventar los desafíos que solo se están empezando a desplegar. Este colapso marca un futuro muy abierto en el que son posibles muchos órdenes sociales diferentes. Finalmente, abordamos cómo hacer una transición desde el momento actual hacia sociedades ecomunitarias en un contexto de colapso, focalizando especialmente cómo realizarlo desde la perspectiva de los cambios necesarios en el mundo del trabajo. "
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