A ɓoye, an gano raƙuman ruwa na cikin teku suna taka rawa a cikin zurfin teku. Ya bambanta da raƙuman ruwa na saman, raƙuman ruwa na ciki suna samuwa ne sakamakon raguwar zafin jiki a cikin yadudduka na ginshiƙan ruwa kuma suna taimakawa wajen kawo plankton zuwa kasan tekun da ke tallafawa dabbobin benthonic. Binciken da aka yi a Whittard Canyon ya nuna cewa yanayin hydrodynamic na gida da ke da alaƙa da raƙuman ruwa na ciki yana da alaƙa da haɓakar halittu.
Kwayoyin da ke rayuwa a cikin ruwa yanayi ko dai plankton ko nekton ko benthos dangane da wurin da suke a cikin yanayin yanayin. Planktons na iya zama ko dai tsire-tsire (phytoplankton) ko dabbobi (zooplankton) kuma yawanci suna iyo (ba da sauri fiye da igiyoyin ruwa ba) ko kuma suna iyo a cikin ginshiƙi na ruwa. Planktons na iya zama ƙananan ƙwayoyin cuta ko mafi girma kamar ciyawa mai iyo da jellyfish. Nektons irin su kifi, squids ko dabbobi masu shayarwa, a daya bangaren, suna iyo da sauri fiye da igiyoyin ruwa. Benthos kamar murjani ba zai iya yin iyo ba, kuma yawanci suna rayuwa a ƙasa ko benen teku a haɗe ko motsi cikin yardar kaina. Dabbobi kamar flatfish, dorinar ruwa, sawfish, haskoki galibi suna rayuwa a kasa amma kuma suna iya iyo a kusa da haka ake kira nektobenthos.
Dabbobin ruwa, murjani polyps ne benthos da ke zaune a kan benen teku. Su ne invertebrates na phylum Cnidaria. An makala a saman, suna ɓoye calcium carbonate don samar da kwarangwal mai wuya wanda a ƙarshe ya ɗauki siffar manyan gine-gine da ake kira coral reefs. Murjani na wurare masu zafi ko saman ruwa yawanci suna rayuwa ne a cikin ruwayen wurare masu nisa inda akwai hasken rana. Suna buƙatar kasancewar algae wanda ke girma a cikin su yana ba su oxygen da sauran abubuwa. Sabanin su, murjani mai zurfi (wanda kuma aka sani da murjani-ruwa mai sanyi) ana samun su a cikin mafi zurfi, sassan duhu na teku kama daga kusa da saman zuwa rami, sama da mita 2,000 inda zafin ruwa zai iya zama sanyi kamar 4 ° C. Waɗannan ba sa buƙatar algae don tsira.
Taguwar ruwa na teku iri biyu ne – raƙuman ruwa (a mahaɗin ruwa da iska) da na ciki taguwar ruwa (a tsaka-tsakin tsaka-tsakin ruwa guda biyu na nau'i daban-daban a ciki). Ana ganin raƙuman ruwa na ciki lokacin da ruwa ya ƙunshi yadudduka na nau'i daban-daban saboda ko dai bambance-bambance a yanayin zafi ko salinity. A cikin teku yan adam, tãguwar ruwa na ciki isar da barbashi abinci gina jiki zuwa saman ruwa da cewa ta da girma na phytoplankton, da kuma bayar da gudunmawa a cikin harkokin sufuri na abinci barbashi zuwa zurfin teku dabbobi.
Hotunan zahirin teku a bayyane yana da tasiri akan tsarin dabbobi a cikin zurfin teku bambancin rayuwa. A cikin wannan binciken, masu binciken sun haɗu da bayanan bayanan teku na jiki tare da bayanan sauti da nazarin halittu don yin tsinkaya, maimakon yin amfani da proxies don masu canjin yanayi, na rarraba murjani mai zurfi da kuma bambancin megafaunal a cikin Whittard Canyon, Arewa maso Gabashin Atlantika. Manufar ita ce a nemo sauye-sauyen muhalli waɗanda suka fi yin hasashen yanayin faunal a cikin canyons. Sun kuma so su sani idan haɗa bayanan tekun ya inganta ikon ƙirar don hasashen rarraba dabbobi. An gano cewa yanayin yanayin hydrodynamic na gida da ke da alaƙa da raƙuman ruwa na ciki yana da alaƙa da haɓakar haɓakar halittu. Bugu da ƙari, aikin ƙirar hasashen ya inganta tare da haɗa bayanan teku.
Wannan bincike yana ba da damar fahimtar tsarin halittar dabbobi masu zurfi a cikin yanayin yanayin ruwa mai zurfi wanda zai taimaka a ingantacciyar ƙoƙarin kiyayewa da sarrafa yanayin halittu.
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Sources:
1. Cibiyar Nazarin Teku ta ƙasa 2020. Labarai - Zurfafa-teku bambancin halittu da murjani reefs suna tasiri da raƙuman ruwa na 'boyayye' a cikin teku. An buga 14 Mayu 2020. Akwai akan layi a https://noc.ac.uk/news/deep-sea-biodiversity-coral-reefs-influenced-hidden-waves-within-ocean An shiga ranar 15 ga Mayu 2020.
2. Pearman TRR., Robert K., et al 2020. Inganta iyawar tsinkaya na nau'ikan rarraba nau'ikan benthic ta hanyar haɗa bayanan oceanographic - Zuwa cikakkiyar ƙirar yanayin muhalli na wani jirgin ruwa na karkashin ruwa. Ci gaba a cikin Tsarin Tekun Tekun 184, Mayu 2020. DOI: https://doi.org/10.1016/j.pocean.2020.102338
3. ESA Duniya akan layi 2000 -2020. Tekun Ciki Waves. Akwai akan layi a https://earth.esa.int/web/guest/missions/esa-operational-eo-missions/ers/instruments/sar/applications/tropical/-/asset_publisher/tZ7pAG6SCnM8/content/oceanic-internal-waves An shiga ranar 15 ga Mayu 2020.
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