All forms of life depend
upon a particular strategy for survival. The strategy imparts a competitive
advantage to the particular species, and insures the genetic code for this
strategy is passed on to future generations. Natural selection is a powerful
mechanism, leaving the failed strategies to history and fossils, and the
successful strategies surrounding us in the natural world. Native peoples
throughout the world have recognized the genius of 3.8 billion years of evolution,
and have learned to imitate and emulate nature. This practice, called biomimicry,
is now being recognized as an appropriate model for modern, industrial man
to achieve a sustainable culture, and insure our survival in the face of
depleted resources from unrestrained and unsustainable growth.
A recent
innovation to the plant kingdom emerged early in the Cenozoic period, and
continues to dominate today. Flowering plants and, specifically, the grasses
developed a strategy to tame the vast plains and the cooler, drier climate
characterizing this geologic period. The dominance of grasses influenced
the evolution of animals, as mammals, and man, flourished and adapted to
the abundance. One particular primitive sub-family, the bamboos, developed
a spectacularly successful survival strategy, evolving over 1500 species,
and a geographic distribution encompassing most of the tropical and temperate
zones.
The bamboo
model has inspired Eastern cultures for centuries, having implications for
familial support, personal philosophy, and aesthetics. Bamboo, as a design
criteria for architecture, as a medium for human interaction with nature,
and as a model for survival, could be called bamboomimicry.
The key
to grass success, in part, was the shallow, fibrous root system that held
the soil and retained moisture. The bamboos utilized a rhizomatous vegetative
growth strategy to increase its competitive advantage. New culms, arising
from rhizomes, grow rapidly as a telescoping tube, achieving a height advantage
and an eventual crown density of foliage that effectively eliminates any
invasive species that might attempt establishment. The tubular architecture
of the culms achieves spectacular heights, with a minimum of material investment,
due to a high strength to weight ratio of the culm design. The culm
tubes bend to distribute stress throughout the culm, and effectively eliminates
any high-localized stress that might cause failure.
The culm
represents up to 97% of the total plant length, and, although strong and
resilient, the extreme leverage of an individual culm could easily dislodge
the shallow root system. To compensate for this weakness, adjacent culms
arise to support each other, as all culms are locked tightly into the rhizomatous
base, and act as one. The dense canopy of interwoven branches insures the
inter-dependence of the culms, yet allowing a flexibility characteristic
of the overall bamboo strategy.
Bamboo
adaptivity and familial interdependence is also illustrated by the ability
of bamboo to extend its space into areas that may not be optimum. New culms
are aided in size and stature by gaining energy, nutrients, and water from
the rhizome connection to the rest of the plant. Once established,
the dense canopy, tightly woven rhizome base, and overlaying mat of leaves,
alters the microclimate, cooling and conserving moisture and nutrients.
Fundamental
to the bamboo strategy is achieving more with less. The visual, above ground
portion of the plant is actually the lesser proportion of the plant; most
of the biomass is underground. The plant invests in the relatively stable
environment of the earth, while the extensions into the unstable atmosphere
are temporary, and expendable. The plant can withstand wind, fire, and drought,
and rapidly rebound with new culm growth when conditions are favorable.
The architectural
application of bamboo survival strategy is appropriate. Flexibility, redundancy,
and interdependence, achieved through minimal material expenditure
are becoming key tenets of good design. Buckminster Fuller used biomimicry
in his conception of the geodesic dome. Tensegrity, his principle of interconnected
components forming a cohesive and strong whole, could be construed as a corollary
to bamboomimicry.
The lessons
of bamboo extend beyond the mere academic applications alluded to in this
examination. Humans, by their nature, require nature. We see beauty in nature,
and bamboo is beautiful. We need nature for relaxation, contemplation, and
recreation. As bamboo is a model of utility, it is also a model of other
human endeavors. The list of bamboo artifacts used for fun and recreation
is long indeed. The marriage of fun and utility would fit the bamboo model
perfectly. It is no accident that bamboo decor is used for places of social
interaction and recreation. It is, therefore, a natural goal of good bamboo
design, not only to include the structural tenets of bamboo, but also to
include the whimsical, the amusing, and the beautiful.
What sort
of design might satisfy the bamboo model, and epitomize bamboomimicry? Allow
me to suggest an example. Long poles, slanted out from the vertical, supporting
a symmetrical dome like canopy. It is spare in material investment, providing
a human space high above the ground, but beneath the protective dome. Although
resting on a shallow, small foundation, the structure is made stable by additional
tensile supports, firmly anchored in the ground, or tied firmly to surrounding
established vegetation, i.e., trees. It is flexible, and fun. It is used
for fun, escape, and contemplation. It fits one, or two, and provides a place
for sleep, secure and removed.
I have
attempted to create a model that fits the criteria of bamboomimetic design,
and it seems to work. As a structure, it is intimately related to its natural
surroundings, and indeed, dependent upon it. Whether situated in a bamboo
grove, a forest, or in an urban backyard, it serves as a means to escape
our manufactured, artificial environment, and re-connect with the natural
world. That connection, however achieved, is not only beneficial, but also
necessary, and fundamental to human existence.