Ko nyika kuenda nomunguva wechitanhatu vakawanda kutsakatika?

Maererano zvichangobva kudzidzwa, wechitanhatu vakawanda kutsakatika, izvo aifanira kutarisana yedu mazuva ano, zvichiita kuti kuparadzwa mhuka. It Vakawana kuti mwero kuderera kwenhamba nemhuka munyika dziri kure nokure kwokutanga Zvaifungidzirwa masayendisiti. Uyezve, kuedza kuti aponese kubva kutsakatika nomumwe kwemarudzi havazokwanisi kubatsira mhuka kwenguva refu.

Kurasikirwa nei ane mhuka

Vaongorori vakawana kuti nerimwe gore anenge maviri yakatotsakatika mhando vertebrates. Zvingaita kuti nhamba idzi kwete zvinoshamisa, asi zvinofanira kunzwisiswa kuti kutsakatika mwero iri 10-100 nguva kupfuura zvepanyama.

Mukuwedzera, vatsvakurudzi cherechedza, akadai mwero kutsakatika dzomusango zvingaratidza pane dambudziko riri kuitika. Zvinoita kuti vamwe vanhu vari kunyangarika nokuti kuti nzvimbo yavo kujekesa ndokuparadzanisa, uye kunogona sezvinoita achisiririsa nokuti nyika yose.

tsvakurudzo masayendisiti

By kudzidza dzinogarisana 26 700 dziri munyika dzakasiyana vertebrates (kusanganisira pamusoro hafu zvose anozivikanwa shiri, mhuka, amphibians uye zvinokambaira), vaongorori vakawana kuti vanopfuura 30 muzana vakafirwa chinokosha chikamu vagari vemo uye dzinogarisana. Vakabva waongorora kuti vagari 177 mhuka zvizere. It Vakawana kuti, kunyange zvazvo mhuka zvose vakafirwa zvinopfuura 30 muzana nzvimbo dzavo, pakati pavo 40 muzana mhuka vakarasikirwa 80 muzana vanhu vadzo.

"Misa kutsakatika kwemarudzi sechinhu kurasikirwa, - anotsanangura Pol Erlih, munyori kudzidza, ane kunoguma dzakabudiswa muna" Proceedings of National Academy of Sciences ". - Asi kanenge sezvo chinokosha (kana kukosha) kurasikirwa vanhu vanoumba mhando. Inofanira uti, nei isu nehanya nevanhu ava. Somuenzaniso, kunyangarika vanhu shiri, zviremwaremwa, uye zvipembenene kuti kudzora zvipukanana, kutungamirira kurasikirwa mari mune zvokurima. "

Kuparadzwa vanhu

Saka, kunyange zvazvo dzimwe mhando haagoni kuzviponesa, vatsvakurudzi vanonyevera kuti hazvisi kuchinja mamiriro ezvinhu, kana iwe Zvibvisike kunokosha kwevanhu. Somuenzaniso, kunyange kana Mexico akaramba duku vakawanda Nyuchi (ndiko, zvichaita zvichiripo somunhu rudzi), rokurima indasitiri muUnited States vachange vaparadzwa, nokuti acharasikirwa chimwe chezvinhu zvinokosha mukume.

"Zvakakosha kuti ticherechedze kuti apo kurasikirwa kwemarudzi akaipa uye zvikurukuru kusingarapiki chakajairika, kurasikirwa vemo uye vagari vemo ane zvimwe unokuvadza," - anoramba Ehrlich.

Kurasikirwa vanhu kuti vari kudyidzana mune cheni chikafu - iri nhau chaizvoizvo zvakaipa, nekuti hutano nyika anotambura. Vazhinji zvinoumba mararamiro vari kunyangarika zvishoma nezvishoma, zvichiguma wetlands havagoni unonatsa mvura yakawanda, uye kupona mumasango kuti kudzivirira mafashamo, riri mungozi. Kutsakatika chavagari inewo aizotangira kuti kutsakatika, uye naizvozvo tinofanira kunyatsoteerera sei nhamba mhuka mavari.