Areas of land which within the animals and forests may not be slaughtered or chopped down.
The functions to collect the seeds or to milk said animals should be enabled however, these areas would just be to 'preserve' what little is left of an almost completely deforested area whilst supplying the seeds to those whom want to reforest it.
This kind of thing would also be somewhat helpful to making open yet semi-protected towns too. (But it would not stop people however from taking your stuff or harvesting entire crops).