0011157: Maximum number of trees seems absolutely unrelated to the initial amount of trees on the map.

ID	Project	Category	View Status	Date Submitted	Last Update

0011157	Dwarf Fortress	Dwarf Mode -- Environment	public	2019-10-03 12:29	2019-10-06 09:29

Reporter	Urist McuristUrist	Assigned To	Loci
Priority	normal	Severity	minor	Reproducibility	have not tried
Status	resolved	Resolution	duplicate
Platform	Personal Computer	OS	Windows 10 PC	OS Version	10.0.18362
Product Version	0.44.12

Summary	0011157: Maximum number of trees seems absolutely unrelated to the initial amount of trees on the map.
Description	Basically I embarked on a Savage Temperate Sand Desert biome with Scarce trees and within three years it became more forested than most Heavily Forested regions are on embark. I don't think that's the intended behavior.
Steps To Reproduce	1. Embark on a Sand Desert (or, most likely, any desert with soil) 2. Wait unthil trees start to appear 3. Trees will cover everything
Additional Information	Might be just the lack of a feature and not a "true" bug. Embark biome is a pure unmixed Savage Temperate Sand Desert, no river or ocean. Caverns have been breached before I noticed this. File: http://dffd.bay12games.com/file.php?id=14551
Tags	No tags attached.

PatrikLundell 2019-10-04 02:17 reporter ~0039523	It's a lack of features. As far as I've been able to determine (a thread a number of years ago), the criterion for whether a sapling can mature to a tree is that there is nothing blocking its access to the sky (above ground trees only, naturally), and that there is nothing blocking access to the tile above (i.e. a 2Z headroom [and bridges don't count: trees readily grow through those on maturation]). The biome (or possibly the Vegetation parameter) determines the rate at which saplings are spawned, and so the rate at which the junglification happens. I don't know if there is any variation in sapling withering rates between biomes. Stockpiles block maturation for as long as they cover a sapling, with withering/maturation determination happening shortly after the stockpile is removed.

Date Modified	Username	Field	Change
2019-10-03 12:29	Urist McuristUrist	New Issue
2019-10-04 02:17	PatrikLundell	Note Added: 0039523
2019-10-06 09:29	Loci	Relationship added	duplicate of 0009581
2019-10-06 09:29	Loci	Status	new => resolved
2019-10-06 09:29	Loci	Resolution	open => duplicate
2019-10-06 09:29	Loci	Assigned To	=> Loci