Spanish to English Science Environment & Ecology Conservation status

I'm translating a document which is discussing the conservation status of the dehesa in Extremadura, mostly in terms of trees and shrubs, and it uses the term "tesela" regularly throughout the document, seemingly to refer to dividing up the land into sections for analysis. I can find numerous examples of the term used within this context in Spanish, but I'm really struggling to find the correct equivalent English term. I can see that someone else has asked this question on Proz previously, and the term agreed on was "tessera". However, I have my doubts as I really don't get any reliable hits when I search for this term within the context of conservation. Here are some example sentences that include the term:

Metodología del estado de conservación a nivel de tesela combinando los estados de conservación arbolado y de arbustos.

Indice de estructura poblacional de árboles a nivel de tesela.

El hábitat 6310, Dehesas perennifolias de Quercus spp en Extremadura comprende una superficie total de Superficie teselada de 1.452.228,5 ha y Superficie de hábitat neto de 1.428.918,5 ha (teniendo en cuenta el % de presencia del hábitat en cada tesela).

Any help would be much appreciated!