Izici Ezibangela Ukuphela Kwezinhlobo Zasolwandle
Ulwandle lumboza ngaphezu kwezingxenye ezimbili kwezintathu zobuso boMhlaba futhi luyikhaya lezinto eziphilayo ezingavamile, kusukela ku-plankton encane kuya kuma-giant whale. Kodwa-ke, lokhu kuceba akuphephile enkingeni. Emashumini eminyaka amuva nje, inani elikhulayo lezinhlobo zasolwandle liye labona inani lazo lincipha kakhulu, laze laba sengozini yokuqothulwa. Ukuqothulwa kwezinhlobo zasolwandle akukhona nje ukulahlekelwa yisilwane esisodwa; kungukuphazamiseka kwenethiwekhi yokuphila okusekela izimiso zemvelo, ukudoba, kanye nokuphepha kokudla kwabantu. Ngakho-ke, yiziphi izici eziyinhloko ezibangela ukuqothulwa kwezinhlobo zasolwandle?
1. Ukudoba ngokweqile
Ukudoba okungaphezu kwamandla abantu ukuthi baphinde baphile kuyimbangela enkulu yokuncipha kwezinhlobo zasolwandle ezindaweni eziningi. Uma izinhlanzi zibanjwa ngaphambi kokuba zithole ithuba lokuzala, inani labantu abadala liyancipha, futhi ukuqashwa kwezizukulwane ezintsha nakho kuyehla. Lo mkhuba uvame ukuqhutshwa yisidingo esikhulu semakethe, ubuchwepheshe bokudoba obuyinkimbinkimbi, kanye nokuqapha okubuthakathaka.
Ezinye izinhlobo ezinezinga lokukhula elihamba kancane zisengozini kakhulu, njengoshaka, imisebe, i-bluefin tuna, kanye nezinhlanzi ezithile zama-reef. Oshaka, isibonelo, bathatha isikhathi eside ukufinyelela ekuvuthweni kokuzala futhi bakhiqiza inzalo encane kakhulu. Lapho kwenzeka ukudoba ngokweqile—kungakhathaliseki ukuthi kuhlosiwe noma kubanjwa ngokungahleliwe—izinhlobo zabo ziyalwela ukubuyela emazingeni aphephile.
2. Imishini Yokudoba Engabanjwanga Ngodoti Nebhubhisayo
Izidalwa eziningi zasolwandle zibanjwa hhayi ngoba ziqondiswe, kodwa ngoba "zihudulwa" ngesikhathi sokudoba. I-bycatch ivame ukuthinta izimfudu zasolwandle, amahlengethwa, izinyoni zasolwandle, oshaka, nezinhlanzi ezincane ezingakafaneleki ukubanjwa. Ama-gillnet, ama-trawl, imigqa emide, kanye nezinye izinto zokudoba zingabamba izilwane eziphefumula amaphaphu noma zibangele ukulimala okukhulu, okuholela ekufeni kwazo ngaphambi kokukhululwa.
Ngaphezu kwalokho, ezinye izinto zokudoba zibhubhisa izindawo zokuhlala. Isibonelo, ukudoba ngamanetha angaphansi komhlaba, ukudonsa amanetha asindayo phansi kolwandle futhi kungalimaza amadwala asezindaweni ezijulile zolwandle, imibhede yotshani basolwandle, kanye nemiphakathi yase-benthic. Lokhu kubhujiswa kwendawo yokuhlala kunciphisa ikhono lezinhlobo eziningi lokufihla, ukudla, nokuzala.
3. Umonakalo Nokulahlekelwa Yindawo Yokuhlala Yasogwini
Izindawo zemvelo zasogwini ezifana nezihlahla ze-mangrove, imibhede yotshani basolwandle, kanye nezindawo zamakhorali zisebenza njengezindawo zokukhulisa izinhlanzi eziningi nezilwane ezingenamgogodla. Zihlinzeka ngendawo yokukhosela izibungu kanye nezilwane ezincane, zigcina ikhabhoni, futhi zimelana nokuguguleka komhlabathi. Kodwa-ke, intuthuko enkulu yasogwini—ukuvuselelwa kabusha, amachweba, izimboni, kanye nezindawo zokuhlala—ngokuvamile kubeka engcupheni lezi zindawo zokuhlala ezibalulekile.
Izihlahla ze-mangrove ziyagawulwa ukuze kukhiqizwe amachibi noma kuthuthukiswe izimfanzi. Imibhede yotshani basolwandle imbozwe yizibi ezivela ekuguguleni nasekugelezeni komhlaba. Amatshe e-coral onakala yizikhonkwane zemikhumbi, ezokuvakasha ezingalawulwa, kanye nokudoba okubhubhisayo. Lapho izindawo zokuhlala zilahleka, izinhlobo ezithembele kuzo ziyancipha.
4. Ukungcoliswa Kwasolwandle: Ipulasitiki, Amakhemikhali, kanye Nemfucuza
Ukungcola kuyingozi eyinkimbinkimbi ngoba imiphumela yako ingaba eqondile nengaqondile. Imfucuza yepulasitiki ingabamba izilwane zasolwandle noma igwinywe, okubangela izinkinga zokugaya ukudla, ukulimala kwangaphakathi, ngisho nokufa. Ama-microplastic, amancane kakhulu, angena ochungechungeni lokudla futhi angaba yingozi empilweni yezinto eziphilayo emazingeni aphansi kakhulu.
Ngaphandle kwepulasitiki, kukhona futhi ukungcola kwamakhemikhali njengezibulala-zinambuzane, izinsimbi ezisindayo (isb., i-mercury), kanye nemfucuza yezimboni. Lezi zinto zinganqwabelana emzimbeni (ukunqwabelana kwezinto eziphilayo) futhi zandise ukugcwala kwezilwane ezidla ezinye izilwane (ukukhulisa izinto eziphilayo). Ngenxa yalokho, izilwane ezifana nemikhomo, amahlengethwa, nezinhlanzi ezidla ezinye izilwane zingaba nezinkinga zokuzala, ukuntuleka kwamasosha omzimba, ngisho nokukhubazeka kokukhula.
Imfucuza yasekhaya ecebile ngezakhamzimba nayo ibangela ukuqothuka kwezitshalo. Ukuqhakaza kwe-algal kungaqeda umoya-mpilo oncibilikisiwe futhi kudale "izindawo ezifile" lapho izinto eziningi eziphilayo zingenakukwazi ukusinda khona.
5. Ukushintsha Kwesimo Sezulu: Ukufudumala Kolwandle kanye Nemisinga Eshintshayo
Ukushintsha kwesimo sezulu kushintsha ulwandle ngezindlela eziningi. Ukwenyuka kwamazinga okushisa olwandle kungaphoqa izinhlobo zezilwane ukuba zithuthele ezindaweni ezipholile, kodwa akuzona zonke ezikwazi ukuzivumelanisa nezimo noma ukufuduka. Izinhlobo ezihlala ezindaweni zokuhlala ezivalekile—njengezinto eziphilayo ezihlala emadwaleni—ngokuvamile zisengozini enkulu.
Ukufudumala nakho kubangela ukufiphala kwamakhorali. Amakhorali acindezelekile akhipha ulwelwe lwawo oluhambisanayo, alahlekelwe umbala, futhi uma ukucindezeleka kuqhubeka, kungafa. Ama-coral reef alimele asho ukulahlekelwa amakhaya ezinkulungwane zezinhlanzi nezinhlobo ezingenamgogodla. Ngaphezu kwalokho, izinguquko emifuleni yolwandle kanye namaphethini esizini kungaphazamisa izikhathi zokuzala, ukufuduka, kanye nokutholakala kokudla.
6. Ukwenziwa Kwe-asidi Yolwandle
Uma umkhathi uqukethe i-carbon dioxide eningi (CO₂), enye yayo imuncwa ulwandle bese isabela ekwakheni i-carbonic acid. Le nqubo yehlisa i-pH yamanzi olwandle futhi yehlisa ukutholakala kwama-ion e-carbonate adingwa yizinto eziphilayo ezakha i-calcium carbonate njenge-coral, i-shellfish, iminenke yasolwandle, kanye nezinye izinhlobo ze-plankton.
Imiphumela inzima kakhulu: amagobolondo namathambo aba buthakathaka kakhulu, ukukhula kuyahamba kancane, futhi amazinga okusinda kwama-larva ayancipha. Ngenxa yokuthi eziningi zalezi zinhlobo ziyisisekelo sezinto eziphilayo kanye nomthombo wokudla kwezinye izilwane, ukwakheka kwe-acid olwandle kungabangela uchungechunge olubanzi lwemiphumela.
7. Ukungalingani Kwezinhlobo Ezihlaselayo kanye Nesistimu Yezinto Eziphilayo
Izinhlobo ezihlaselayo zingangena ezindaweni ezintsha zemvelo ngamanzi e-ballast emikhumbi, ukuhweba nge-aquarium, noma ukufuduka ngengozi. Ezindaweni ezintsha, zingaba yizilwane ezidla ezinye, izimbangi, noma abathwali bezifo abasongela izinhlobo zendawo. Ngenxa yokuthi izinhlobo zendawo azikathuthuki ukuze zibhekane nezinsongo ezintsha, inani lazo lingancipha ngokushesha.
Izibonelo zifaka phakathi izinhlobo eziningana zezinhlanzi, i-jellyfish, kanye ne-starfish ezidla amakhorali, ezinazo eziningi ngenxa yokungalingani kwezindawo zemvelo. Lapho izilwane ezidla ezinye izilwane zemvelo zincishiswa ukudoba ngokweqile, ezinye izinto eziphilayo zingachuma zingalawulwa futhi zibhubhise izindawo zazo zokuhlala.
8. Umsindo Wasolwandle Nokuphazamiseka Kwemisebenzi Yabantu
Ulwandle aluyona indawo ethule. Kodwa-ke, umsindo owandayo ovela emikhunjini, ukubhoboza, ukwakhiwa kolwandle, ngisho ne-sonar yezempi kungaphazamisa izilwane zasolwandle, ikakhulukazi izilwane ezincelisayo ezithembele emsindweni ukuze zikwazi ukuhamba, ukuxhumana, kanye nokuzingela.
Lokhu kuphazamiseka kungabangela ukucindezeleka okungapheli, ukushintsha kwemizila yokufuduka, ubunzima bokuthola ukudla, ngisho nokunamathela kwemikhomo namahlengethwa kwezinye izimo. Nakuba imiphumela yayo ivame ukubonakala kancane njengokungcola kwepulasitiki, umsindo uyisici esibonakala kakhulu njengosongo olukhulu ezinhlotsheni ezithile.
9. Ukuhweba Ngezilwane Zasendle Nokusetshenziswa Kabi Kwezinto Eziphilayo Zasolwandle
Ngaphezu kokudoba ngokudla, kukhona ukuxhashazwa ngezinjongo zokuhweba—isibonelo, ukugoba amafindo oshaka, ukudoba ihhashi lasolwandle, izinhlanzi zasemanzini ukuze kugcinwe emanzini, kanye nokuvunwa kwamakhorali kanye nezinhlanzi zokuhlobisa. Eziningi zalezi zinhlobo zidlala indima ebalulekile ohlelweni lwemvelo. Uma zidotshwa ngokweqile, umthelela awugcini nje kuphela ezinhlotsheni ezihlosiwe kodwa futhi nasekuzinzeni komphakathi obanzi.
Isiphetho: Ukuqothulwa Kwasolwandle Kuyinkinga Yemvelo Neyezenhlalo
Ukuphela kwezinhlobo zasolwandle akuvamile ukubangelwa yisici esisodwa. Ngokuvamile, izingcindezi eziningana zisebenza ndawonye: ukudoba ngokweqile kwenzeka njengoba indawo yokuhlala incipha; ukuguquka kwesimo sezulu kwandisa ukucindezeleka; ukungcola kuphazamisa ukuzala; kanti izinhlobo ezihlaselayo zengeza umthwalo. Lokhu kuhlanganiswa kudala "isiphepho esiphelele" kubantu abaningi.
Ukunciphisa usongo lokuqothulwa kudinga isinyathelo esihlangene: ukuphathwa kwezokudoba okusekelwe kwisayensi, ukuphoqelelwa kwemithethonqubo yemishini yokudoba enobungani nemvelo, ukuvikelwa kwezindawo zokuhlala (izindawo ezivikelwe olwandle), ukunciphisa imfucuza esuselwe ezweni kanye nokungcola, kanye nemizamo yomhlaba wonke yokunciphisa ukukhishwa kwamagesi okushisa umhlaba. Ukugcina izinhlobo zasolwandle ziphila akukhona nje ukulondolozwa; kumayelana nokuqinisekisa ukuthi ulwandle luhlala luyisistimu yokusekela impilo yezizukulwane zamanje nezesikhathi esizayo.
