ecoculture: emergence in urban ecologychapter.ser.org/texas/files/2013/11/welch-emergent... ·...
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Ecoculture: Emergence in urban
ecology
Matt Welch, Madrone Landscaping LDC and Mateo Scoggins, City of Austin
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Basic Characteristics of Oak Mott Ecology
--Carbon retentive at soil level (suckers)--Deep fermentation layer/ A layer in soil increases:
-Nutrient cycling (microbial activity)-Moisture absorption/retention, deep storage-Deep, dense root systems
--Humus/organic matter/root mass “heaving” alleviates slope--Emergence of soil depth, biomass, species richness and diversity. Growth over time.
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Models and objectives
● Why does it work better on the other side of the fence? ○ Super productive ecologies?○ Hostile desolate systems where things are still
working. Plants in hostile locations.○ Look at simple systems, i.e. cliffside ecology, vernal
pools, sidewalks at what is generating life.
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Typical Managed Landscape Model:
--Carbon depleting: mow, blow, haul it to the dump--Cleanliness over ecological process--Rainwater repellant: send it to the gutter--Thin-soiled:
--garden soil smeared over clay, bedrock. --Very little microbial/fungal activity. --Very little moisture absorption/retention.--Shallow roots, quick to dry up
--Heavily leached with chlorinated tap water irrigation--Warm season only--Product-heavy (snake oil)
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Ecoculture● New model for urban residential land management● Seeks to maximize productivity and carbon/nitrogen
cycling through:--deep tilling of organic matter/compost --terraforming for passive rainwater harvesting--use of “carbon dumping” perennials and woodies--spring/fall cut and cover while still green--seasonal (x4) application of compost/mulch to cover--cool season manure crops
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Deep soil is key.
● Start with clay, ideally● Broadfork (12-16”)● Manure compost 10-20%● Bark mulch/wood chips 10-20%● 3-5 turnings--broadfork and shovel-- to break up clay● Light liquid feed at time of planting (humic acid, N,
fungal)● Drench soil at planting: large H2o investment
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Myths worth busting:
1. Native plants “need” poor soil2. Xeric plants are more ecologically beneficial3. Organic matter just disappears4. Mulch with gravel5. Plants will “drown” if flooded
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- plants’ phenological response to drought in nature vs. urban landscape (irrigation, etc). - Size and abundance of large woody material (hugel culture).- How to scale this up from yard to parcel.- Effects of city water (chlorine, etc) on soil biology, respiration, etc. vs rainwater
Areas for research: