Archive

evolution

141108-0616

What we do is not like “regular” gardening!

In some ways the relationship between a deep nature garden and its human caretaker runs in the opposite direction than it does in a “normal” garden.

Here is a table that might make these differences more clear:

traditional garden deep nature garden
garden expected to “obey” gardener gardener and garden co-evolve
gardener takes care of garden garden adapts itself to conditions
maintains a consistent design design co-evolves with gardener
garden is planted garden grows in
garden is “done” once it is planted garden constantly evolves
ecosystem is simple and controlled ecosystem is complex and self-regulated
contains only selected plants contains many volunteers
unexpected sprouts are removed unexpected sprouts are celebrated
pruned for controlled appearance pruned for natural appearance
wants to be “complete” may have some blank places
plant eaters are killed plant eaters are welcome
augmented with fertilizers augmented (if at all) with compost
“protected” by poisons not in need of protection
gardener works in the garden gardener merges into the garden
conforms to gardener’s vision always reveals new beauty

 

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140519-0621

We have not seen much dew in the Bay Area in this year of record drought, so here’s a reminder that sometimes there is actual moisture around here! On December 24, 2012 the sun lit up this tiny spider web among irises and Santa Barbara daisies.

140519-0623The spider that spun this web was no larger than a pin head, yet it contained enough instinctive knowledge to construct this complicated, 3-dimensional structure suspended expertly from  leaves and stems.

A typical organic garden contains thousands of spiders of many kinds. Most of them remain hidden in the vegetation, actively exploring for prey. Only a few spin webs that are large enough to be easily noticed.

The presence of spiders in the garden is ecologically profound, because they eat a significant fraction of the flying and crawling insects. In webs just like this one in the same garden, I have spotted fungus gnats, parasitic wasps, fruit flies, many other small insects, and even a lady beetle.

There are more than 42,000 kinds of spiders. They have been around for 400 million years, evolving from fascinating little critters called trigonotarbids that looked a little like modern ticks and mites.

Back in those early days there were no dew-spangled spider webs because web-weaving spiders had not yet evolved. True spiders with spinnerets appeared around 300 million years ago during the Carboniferous, a time when yard-long dragonflies cruised the skies. It must have been a great time to evolve predators!

There’s more about spider evolution at Wikipedia. There’s also a neat article about trigonotarbids.

140519-0625