Ukukhanya, amanzi, izakhamzimba: Ukuncintisana kwezinsizakusebenza ehlathini kukhulu. Ikakhulukazi ngemva kweminyaka ebizwa ngokuthi yi-mast, lapho izitshalo zikhiqiza khona inani elikhulu lezithombo, kuqala "umjaho wokukhula". Ukuthi umehluko wokuphakama phakathi kwezihlahla ezincane onyakeni wazo wokuqala wokuphila ubalulekile yini ekuthuthukisweni kwazo kwesikhathi esizayo, noma ngabe zingamasentimitha amabili noma ngaphezulu, kwakungacaci ngaphambilini. Abacwaningi eNyuvesi yaseGöttingen manje sebekhombisile ukuthi izithombo ze-beech ezinde kancane kunomakhelwane bazo abaseduze ekupheleni konyaka wazo wokuqala zinethuba eliphakeme lokusinda ngisho naseminyakeni engamashumi amabili kamuva. Imiphumela ishicilelwe kuyi-Journal of Ecology.
Esifundweni sesikhathi eside, ithimba libone izithombo ze-beech ezingaphezu kuka-2.000 ezindaweni ezimbili zokuhlola eduze kwaseFreising naseLandshut esikhathini seminyaka engama-25. Kuzithombo ezingu-2.214 ezirekhodiwe, ezingu-679 zasinda - inani lezihlahla lehla cishe ngamaphesenti angama-70, umphumela wokuncintisana okuqondile. Umehluko wosayizi wokuqala waba sobala kakhulu ngokuhamba kwesikhathi. Izithombo ezazinkulu kancane kunomakhelwane bazo abaseduze ngonyaka wokuhluma ngokuvamile zazigcina isikhundla sazo esigabeni sobukhulu, kuyilapho izihlahla ezincane zazingavamile ukubamba. Ukuhlolwa okwengeziwe kwe-greenhouse kubonise ukuthi amantongomane e-beech anzima aholela ezithombo ezinkulu ezine-biomass enkulu. Ngakho-ke, usayizi wembewu ubonakala udlala indima ekunqumeni inzuzo yokukhula kokuqala futhi ngaleyo ndlela unokubaluleka kwesikhathi eside.
Sekuyiminyaka eminingi kwaziwa ukuthi izihlahla zobudala obufanayo ziyancipha ngokwemvelo ngokuhamba kwesikhathi, ngaphandle kokungenela komuntu. Le nqubo ilandela imithetho yezibalo. Kodwa-ke, bekungacaci ukuthi yiziphi izithombo eziningi ezivele ngonyaka owodwa ezizogcina ziphumelele, ngokusho kombhali oholayo uSolwazi uDkt. Christian Ammer wase-Faculty of Forest Sciences and Forest Ecology eNyuvesi yaseGöttingen. Kusazobonakala ukuthi izihlahla ezingamamitha ayi-15 ubude manje zizokhula kanjani esimweni sezulu esishintshayo. Ucwaningo lubonisa ukuthi izinzuzo zokuncintisana nokusinda ezihlahleni zivela ngokushesha ngokumangazayo. Nokho, ukuthi lezi zinzuzo zokukhula ziyaqhubeka yini ngisho nangaphansi kwezimo zezulu ezimbi kakhulu, umbuzo ovulekile futhi yisihloko socwaningo lwesikhathi esizayo.
Ukushicilelwa kwangempela:
U-Ammer, C. nabanye. Phuma ngokushesha esigabeni sokuqala—Umehluko omncane wokuqala ngobukhulu bembewu kanye nezithombo uthinta ukusinda nokukhula kwesihlahla eminyakeni engama-25. I-Journal of Ecology (2026). I-DOI: http://10.1111/1365-2745.70407
