The upcoming presentation is on plants that uptake nickel as a biological weapon to combat insect predation, and the insect that is beating the system reinforces the connectedness between plants and other features of the natural world. In the Carrizo Plain there are plants that only grow in salty soils, or gypsum rich soils, or iron-rich friable soils. Some are dependent on the fungal population, some on forced absence of other species generated by the soil chemistry which eliminates competition. The fungi, which have shown up in profusion this year have a completely different roster of species in the Cambria pines (great January field
trip by the way), and in the Los Osos Oaks. Without the mushrooms, dead stuff will accumulate on the ground, and the fungi chew into the pine needles and old branches to release the nutrients for the next generation of plants. That is why CNPS, in a resolution made several decades ago, stated that it was ‘more than just plants’ in considering ecosytem integrity.
There is, of course, always a problem in these days of human activity in the
natural environment. As Mark Skinner points out, we have introduced weeds that are great ‘generalists,’ have a rapid and early growth cycle, and abundant seed production. These can cover the substrate, denying the space needed for the fruiting of mushrooms, and eliminating space for natives. Sometimes the soils that are still ‘nasty’ as far as the aliens are concerned, will become the last stands for important parts of the California flora.