A cikin binciken da aka yi a shekarar 1999 an gano cewa murabba'in kilomita ɗaya na gandun daji na Amazon na iya ƙunsar kimanin tan 90,790. Ana kiyasta matsakaicin tsire-tsire na tsire-tsire a 356 ± 47 ton a kowace kadada. Zuwa yau, an kiyasta kimanin nau'in tsire-tsire 438,000 na tattalin arziki da zamantakewar jama'a da aka yi rajista a yankin tare da sauran da za a gano ko kuma a lissafa su. An kiyasta adadin nau'in bishiyoyi a yankin a 16,000. Tambaya: Tsire-tsire nawa ne murabba'in kilomita na gandun daji na Amazon zai iya ƙunsar?
90,790 ton na tsire-tsire masu rai