Yanayin Haske na Dare da Tasirin Muhalli a Aotearoa New Zealand

1. Gabatarwa & Bayyani

Haske na Wucin Gadi da Dare (ALAN) yana wakiltar gurɓataccen muhalli mai yaduwa amma ba a kimanta shi sosai ba. Wannan binciken na Cieraad da Farnworth (2023) yana ƙididdige saurin faɗaɗa ALAN a cikin Aotearoa New Zealand tsakanin 2012 zuwa 2021 ta amfani da hotunan tauraron dan adam kuma yana haɗa fahimtar yanzu, ɓatacce game da sakamakonsa na muhalli. Binciken ya sanya ALAN ba kawai a matsayin batun kyan gani ba amma a matsayin babban mai rushewar yanayin ilimin halitta da na muhalli waɗanda suka samo asali a ƙarƙashin tsarin haske da duhu na halitta.

Babban Fahimta: Yayin da kashi 95.2% na yankin ƙasar New Zealand ya kasance ba a haskaka shi kai tsaye, yankin da aka haskaka ya faɗaɗa da kashi 37.4% a cikin shekaru goma, tare da kusan 4690 km² suna fuskantar haɓakar madaidaicin haske na kashi 87%. Wannan yanayin yana barazana ga "lulluɓin sararin samaniya" na ƙasar da kuma tsarin muhallinta masu alaƙa.

2. Hanyoyin Bincike & Nazarin Bayanai

Binciken ya yi amfani da hanyar bincike mai fuska biyu: nazarin sararin samaniya mai ƙima da bita na inganci mai tsari.

2.1 Bayanan Tauraron Dan Adam & Yanayi

An samo yanayin ALAN daga bayanan firikwensin Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) (2012-2021). Nazarin ya mayar da hankali kan canje-canje a yankin da aka haskaka da ƙimar haske. Muhimmin bayanin fasaha shine iyakacin firikwensin: baya ɗaukar hasken sararin sama (haske mai watsewa) kuma ba shi da ƙarfin hankali ga bakan shuɗi mai yawa na LED na zamani, ma'ana haɓakar da aka ruwaito ƙananan ƙididdiga ne masu ra'ayin mazan jiya.

Mahimman Bayanai (2012-2021)

Haɓakar Yankin da aka Haskaka: 37.4% (daga kashi 3.0% zuwa 4.2% na ƙasar)
Yanki tare da Haɓakar Haske: 4694 km² (Matsakaicin haɓaka: 87%)
Yanki tare da Ragewar Haske: 886 km² (Matsakaicin raguwa: 33%, galibi a cikin cibiyoyin birane)
Yawan Al'umma Ƙarƙashin Sararin Samaniya Mai Gurbata Haske: >97% (Falchi et al., 2016)

2.2 Tsarin Bita na Adabi

An kafa kimanta tasirin muhalli bisa bitar wallafe-wallafe masu dacewa 39. An tsara bitar don rarraba tasiri ta ƙungiyar haraji (misali, avifauna, dabbobi masu shayarwa, kwari) da kuma ta nau'in tasiri (halayya, ilimin halitta, matakin yawan jama'a). Wani muhimmin binciken shine ƙarancin ingantattun bincike.

3. Babban Bincike & Sakamako

3.1 Yanayin Lokaci da Wuri na ALAN

Faɗaɗa ALAN ba daidai ba ne. Haɓaka yana kan gefen birane da kuma a yankunan da ke kusa da birane, yayin da wasu cibiyoyin birane ke nuna raguwar haske, mai yiwuwa saboda gyaran haske (misali, zuwa LED masu garkuwa). Duk da haka, cikakken haske a cikin waɗannan cibiyoyin birane ya kasance mai girma. Canji daga High-Pressure Sodium (HPS) zuwa hasken Light-Emitting Diode (LED) shine babban mai tayar da hankali, yana gabatar da bakan haske mai faɗi, sau da yawa mai canzawa zuwa shuɗi tare da yuwuwar babban rushewar muhalli.

Bayyana Taswirar: Taswirar Canjin ALAN (Ra'ayi)

Taswira ta ra'ayi na New Zealand za ta nuna: 1) Manyan wurare masu duhu (kashi 95.2% na ƙasa) ba tare da fitar da iska kai tsaye ba. 2) "Halo" na haske (ja/lemu) a kusa da manyan biranen kamar Auckland, Wellington, da Christchurch, wanda ke wakiltar 4694 km² na haɓakar haske. 3) Ƙananan aljihu na raguwar haske (shuɗi) a cikin cibiyoyin birane. 4) Rufe-fukafukan da ba a iya gani ba suna wakiltar faɗuwar sararin sama, wanda ya wuce yankunan fitarwa kai tsaye da aka nuna.

3.2 Kimanta Tasirin Muhalli

Bitar wallafe-wallafen ta bayyana yanayin bincike da ke mamaye nazarin halayya, musamman akan tsuntsaye, dabbobi masu shayarwa, da kwari. Tasirin gama gari ya haɗa da:

Avifauna (Tsuntsaye): Canza lokutan neman abinci, ɓata hanya yayin ƙaura, da canje-canje a lokacin waƙar alfijir.
Kwari: Jan hankali mai mutuwa (phototaxis mai kyau), yana rushe pollination da yanayin mafarauta da ganima.
Dabbobi Masu Shayarwa: Canza tsarin ayyuka a cikin nau'ikan dare (misali, jemagu, rodents).

Mahimman Gibin da aka Gano: Fiye da kashi 31% na bayanan sun kasance lura na gabaɗaya, ba ingantattun bincike ba. Akwai kusan rashin bincike akan herpetofauna (dabbobi masu rarrafe/amphibians) da dabbobi masu shayarwa na ruwa. Muhimmanci, binciken da ke ƙididdige tasiri akan girman yawan jama'a, hulɗar nau'in (misali, gasa, farauta), da aikin tsarin muhalli (misali, sake zagayowar sinadirai) kusan babu shi.

4. Nazarin Fasaha & Iyakoki

Ƙarfin ƙididdiga na binciken shine amfani da bayanan tauraron dan adam na shekaru goma, masu daidaito. Duk da haka, iyakokin fasaha suna da zurfi kuma suna ayyana iyakar binciken ALAN na yanzu:

Hankalin Bakan Firikwensin: VIIRS DNB an inganta shi don gani/kusa da infrared. Haske ($L$) da aka auna shine haɗin kai akan aikin amsawar bakan sa $R(\lambda)$: $L = \int L_{\lambda} R(\lambda) d\lambda$. Yana ƙididdige ƙarancin fitar da LED mai arziki inda $R(\lambda)$ ya yi ƙasa.
Barin Hasken Sama: Binciken ya bayyana a sarari cewa bayanan ba su ɗauki haske mai watsewa (hasken sama) ba, wanda zai iya shafar wurare ɗaruruwan kilomita daga tushen. Ana buƙatar samfura kamar na Falchi et al. (2016) don ƙididdige wannan ɓangaren.
Ƙudurin Lokaci: Hotunan dare na iya rasa abubuwan haske na ɗan gajeren lokaci ko bambance-bambancen yanayi a cikin ayyukan ɗan adam.

5. Tsarin Nazari & Nazarin Lamari

Tsari: Tasirin Tasirin ALAN
Don matsawa bayan binciken bayyanawa, muna ba da shawarar tsarin dalili don tsara bincike na gaba:

Bayyanuwa: Ƙididdige ƙarfin ALAN ($\mu W/cm^2/sr$), bakan (Matsakaicin Yanayin Launi - CCT), da tsarin lokaci (tsawon lokaci, flicker) a wurin kwayoyin halitta.
Amsar Ilimin Halitta/Biochemical: Auna canje-canje a matakan hormone (misali, danniya melatonin), bayyanar kwayoyin halitta, ko ƙimar metabolism. Wannan yana bin ƙa'idodi iri ɗaya da samfurin amsa-kashi a cikin ilimin guba.
Amsar Halayya: Rubuta canjin aiki, neman abinci, haifuwa, ko halayyar ƙaura.
Tasirin Yawan Jama'a & Al'umma: Kimanta canje-canje a cikin rayuwa, haihuwa, yawan yawan jama'a, da tsarin nau'in.
Aikin Tsarin Muhalli: Kimanta tasiri akan matakai kamar pollination, watsa iri, ko sake zagayowar sinadirai.

Nazarin Lamari Ba tare da Lamba ba: Kererū (Tattabaran New Zealand)
Yin amfani da wannan tsarin: 1) Bayyanuwa: Taswirar matakan ALAN a cikin Wellington na karkara inda kererū ke zama. 2) Ilimin Halitta: Samfurin metabolites na glucocorticoid na najasa a matsayin alamar damuwa daga tsuntsaye a cikin haske da duhu. 3) Halayya: Yi amfani da bin diddigin GPS don kwatanta lokutan farawa na neman abinci da hanyoyin. 4) Yawan Jama'a: Kwatanta ƙimar nasarar fitar da 'ya'yan tsuntsaye a yankuna masu bambancin bayyanar ALAN. Wannan tsari mai tsari zai iya ware hanyoyin da ƙididdige tasirin ainihin duniya.

6. Aikace-aikace na Gaba & Hanyoyin Bincike

Binciken kira ne na aiki da aka yi niyya. Hanyoyin gaba dole ne su haɗa da:

Hankali na Gaba: Tura na'urori masu auna bakan haske na ƙasa (kamar waɗanda aka yi amfani da su a cikin Loss of the Night Network) don daidaitawa daidai cikakken bakan da ɓangarorin hasken sama na hasken LED na zamani, rufe gibin bayanan tauraron dan adam.
Dole Kimanta Tasiri: Bayar da shawarar cewa a haɗa ALAN a cikin Kimanta Tasirin Muhalli (EIAs) don sabbin ci gaba, kama da hayaniya ko gurɓataccen ruwa.
Manufofin "Haske Mai Hikima": Haɓaka haske mai daidaitawa wanda ke dushewa ko kashewa lokacin da ba a buƙata, yana amfani da na'urori masu auna motsi, da kuma tilasta cikakken kayan aikin yanke da CCT masu dumi (<3000K) don rage fitar da hasken shuɗi.
Sa ido na Dogon Lokaci na Muhalli: Kafa wuraren bincike na dogon lokaci na musamman (kamar hanyoyin sadarwa na LTER) don bin diddigin canje-canjen yawan jama'a da matakin tsarin muhalli masu alaƙa da ma'aunin ALAN.
Haɗin Kai Tsakanin Fannoni: Haɗa ilimin halittar ALAN tare da ilimin lokaci, ilimin hankali, da fasahar kiyayewa don haɓaka samfuran hasashen tasiri.

7. Nassoshi

Cieraad, E., & Farnworth, B. (2023). Yanayin haske yana bayyana yanayin lulluɓin sararin samaniya mai duhu: haske da dare da tasirinsa na muhalli a Aotearoa New Zealand. New Zealand Journal of Ecology, 47(1), 3559.
Falchi, F., Cinzano, P., Duriscoe, D., Kyba, C. C. M., Elvidge, C. D., Baugh, K., ... & Furgoni, R. (2016). Sabon taswirar duniya na hasken sararin samaniya na wucin gadi da dare. Science Advances, 2(6), e1600377.
Gaston, K. J., Bennie, J., Davies, T. W., & Hopkins, J. (2013). Tasirin muhalli na gurɓataccen haske da dare: kimantawa na injiniya. Biological Reviews, 88(4), 912-927.
Kyba, C. C. M., Kuester, T., Sánchez de Miguel, A., Baugh, K., Jechow, A., Hölker, F., ... & Guanter, L. (2017). Farfajiyar duniya da aka haskaka da dare yana ƙaruwa cikin haske da faɗi. Science Advances, 3(11), e1701528.
Sanders, D., Frago, E., Kehoe, R., Patterson, C., & Gaston, K. J. (2021). Meta-analysis na tasirin ilimin halitta na haske na wucin gadi da dare. Nature Ecology & Evolution, 5(1), 74-81.
Zielinska-Dabkowska, K. M., & Xavia, K. (2021). Kare muhallin dare: sabon mayar da hankali ga haske mai dorewa. Lighting Research & Technology, 53(8), 691-710.

Ra'ayin Manazarcin: Duse Aotearoa

Babban Fahimta: Cieraad da Farnworth sun ba da darasi mai zurfi a cikin fassara pixels na tauraron dan adam zuwa labarin manufa mai jan hankali. Babban binciken su—haɓakar yanki mai haske na kashi 37.4%—ba ƙididdiga kawai ba ne; shine lalata ƙimar kadarorin muhalli na ƙasa: duhu. Duk da haka, ainihin bugun, yana cikin bincikensu na tsattsauran ra'ayi na kimiyya da kanta, yana bayyana fagen har yanzu yana cikin ƙuruciyarsa na lura, cikin haɗari maras kayan aiki don hasashen sakamakon tsarin wannan saurin canji.

Kwararar Hankali & Matsayin Dabarun: Hankalin takardar ba shi da kyau. Na farko, kafa ƙimar canji (bayanin yanayi), wanda ke da ban tsoro. Na biyu, bambanta wannan tare da yanayin ilimi (bita na wallafe-wallafe), wanda bai isa ba. Wannan binciken gibin ya haifar da ƙarfi, gaggawar shari'ar aiki. Sun gano daidai canjin zuwa fasahar LED a matsayin mai canza wasa, ba nasara mai sauƙi ba. Kamar yadda Ƙungiyar Duhu ta Duniya ta lura, bakan shuɗi mai yawa na LED da yawa yana rushewa musamman ga yanayin circadian a cikin haraji, wani batu da binciken ya jaddada game da iyakokin firikwensin VIIRS. Wannan yana sanya matsalar a matsayin mai ƙarfi da taɓaɓɓu, ba tsayayye ba.

Ƙarfi & Aibobi Masu Bayyanawa: Ƙarfin binciken shine ainihin tushensa, sarari na musamman. Masu bincike na gaba za su iya auna ci gaba ko gazawa a kan layin yanayi na 2012-2021. Babban aibi, wanda marubutan suka yarda a fili, fasaha ne: dogaro da bayanan tauraron dan adam waɗanda suka rasa hasken sama kuma suna ƙididdige ƙarancin hasken shuɗi kamar auna ambaliya tare da ma'aunin ruwan sama wanda baya tattara hazo. Wannan yana buƙatar yaƙin gaskiyar ƙasa mai dacewa. Bugu da ƙari, yayin da bitar wallafe-wallafen ke da laifi, za a iya ƙarfafa shi ta hanyar ingantaccen meta-analysis ko ka'idar bita na tsari (misali, PRISMA) don kawar da son zuciya da ƙididdige girman tasiri inda zai yiwu, kamar yadda aka fara a cikin babban meta-analysis na Sanders et al. (2021).

Fahimta Mai Aiki: Ga masu tsara manufofi da masu gudanar da muhalli, wannan takarda tana ba da taswira bayyananne. 1) Ka'idojin Bakan: Nan da nan ba da shawarar yankuna ko ma'auni waɗanda ke iyakance Matsakaicin Yanayin Launi (CCT) na hasken jama'a zuwa 3000K ko ƙasa, rage hasken shuɗi mai cutarwa ga ilimin halitta. 2) Bincike na Injiniya na Kuɗi: Mayar da kuɗi daga binciken lura kawai zuwa gwaje-gwajen da ke bin tasirin tasiri daga photon zuwa aikin tsarin muhalli, cike manyan gibin da aka gano. 3) Rungumi "Duhu Mai Hikima": Zama zakaran sarrafa haske mai daidaitawa a matsayin ɓangaren da ba za a iya jayayya ba na abubuwan more rayuwa na birane mai dorewa. Fasahar ta wanzu; nufin aiwatar da shi shine canjin da ya ɓace. A zahiri, wannan binciken yana canza ALAN daga damuwa na muhalli maras tabbas zuwa gurɓataccen abu mai aunawa, mai sarrafawa. Tambayar Aotearoa New Zealand ba ita ce idan za ta yi aiki ba, amma ko za ta yi aiki da sauri don adana ingancin muhalli na shimfidar wurarenta na dare.