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A bioshelter is a solar greenhouse managed as an indoor ecosystem. The word bioshelter was coined by the New Alchemy Institute and solar designers Sean Wellesley-Miller and Day Chahroudi[1]. The term was created to distinguish their work in greenhouse design and management from twentieth century petro-chemical fuelled monoculture greenhouses.

New Alchemy's pioneering work in ecological design is documented in their published Journals and Reports. In 1976 the Alchemists built the Cape Cod Ark bioshelter and her sister The Prince Edward Island Ark. For the next 15 years the New Alchemy Institute studied and reported on the use of these prototype food producing ecosystems.

A bioshelter (life-shelter) involves two fields of knowledge and design. The first is architecture designed to nuture an ecosystem within. A bioshelter structure uses glazing to contain and protect the living biology inside, control air exchange and absorb energy. The building exchanges nutrients, gases and energy with the surrounding environment, produces crops, and recycles waste organic material lnto the soil. [1] Solar energy is stored as heat energy in thermal mass such as water, stone, masonry, soil and plant biomass.

The second is the biology inside the bioshelter. in 1978 Earle Barnhart of the New Alchemy Institute has compared a bioshelter to a contained ecosystem.[2] The structure of the bioshelter and the thermal mass inside moderates the air temperature. Solar heat is absorbed and stored for later use. Water moves through the soil and plants. Year-round habitat is provided for beneficial insects . Ecological relationships between pests and their predators reduce the number of pests. Gases are exchanged among the animals, insects, micro-organisms, soil and plants. Within the bioshelter are a variety of microclimates. The south central areas receive the most direct sunlight. The north, east and west areas are shaded for a portion of the day. Nutrient cycles are developed between fish, plant & soil. A well-designed bioshelter, managed by human intelligence, can shelter a community of people, food crops, edible fish, and a diverse ecosystem of plants, animals and soil life.

ReferencesEdit

  1. 1.0 1.1 Todd, N.J. and Todd J., 1994. From Eco-Cities to Living Machines - Principles of Ecological Design, North Atlantic Books, Berkley, CA.
  2. Barnhart, E. 1978. Biotechnic Strategies in Bioshelters, The Journal of the New Alchemists No. 5, New Alchemy Institute, Falmouth MA

External linksEdit

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The original article was at Bioshelter. The list of authors can be seen in the history for that page. The text of Wikipedia is available under the CC-BY-SA 3.0 license.


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