Didymo a New Zealand

A shekara ta 2004 an gano Didymosphenia geminata, wani diatom da aka fi sani da didymo ko dutse,  an gano shi a New Zealand, karo na farko da aka gano shi a Kudancin Hemisphere. Don hana yaduwarsa, an ayyana dukan tsibirin Kudancin New Zealand a matsayin yanki mai sarrafawa a cikin Disamba 2005. Duk abubuwa, kamar jiragen ruwa, kayan kamun kifi, tufafi, da motoci, waɗanda ke cikin rafi, kogi ko tafkin, dole ne a tsaftace su kafin su shiga wata hanyar ruwa. Biosecurity New Zealand da ke aiki tare da Muhalli Southland, AgriQuality da Kifi da Game New Zealand sun ƙaddamar da babban gangamin wayar da kan jama'a don ƙarfafa masu amfani da kogin su tsaftace kayan aikin su bayan amfani da su a cikin hanyoyin ruwa da abin ya shafa. Wannan yaƙin neman zaɓe ya yi nasara sosai, tare da 99% na masu amfani da ruwa da aka bincika a cikin 2008 a cikin Kudancin Island suna sane da didymo.

 Sakamakon da ba daidai ba 
Didymo na iya yin tasiri mai mahimmanci akan kwarin da ke zama tushen abinci ga nau'ikan kifi da yawa. Yana iya samar da manyan algal blooms. Yana sanya gadajen ƙorafi su zama slim, wanda ke haifar da haɗari ga masu yin iyo. Didymo blooms kuma yana haifar da haɗari ga: samar da wutar lantarki, ban ruwa da amfani da ruwa na nishaɗi. Didymo yana toshe matattarar ruwan sha na gida.

 Yaduwa 
A cikin Oktoban 2004, an sami wani girma mai ban mamaki a cikin ƙananan kogin Waiau a Southland. Cibiyar Nazarin Ruwa da Ruwa ta Kasa ta gano algae a matsayin Didymosphenia geminata kuma ta tabbatar da cewa ita ce ganowar farko ta New Zealand.

A cikin Oktoba 2005, an gano yawan mutanen didymo a cikin kogin Hāwea, Buller, Ōreti da Upper Clutha. Ana gudanar da gwajin iyakancewa a magudanar ruwa ta Arewa Island da sauran tsarin kogin Kudancin Tsibirin don gano yadda didymo ya yadu a New Zealand.

A cikin Oktoba 2007, an gano matattun ƙwayoyin didymo a cikin samfuran ruwa na yau da kullun daga kogin Whanganui, Tongariro, Whakapapa, da rafin Mangatepopo a tsakiyar Tsibirin Arewa, tare da MAF da ake zargin ƙarin gurɓatawa.

A cikin Oktoba 2009, an gano didymo a cikin Upper Rangitata River a Canterbury. Kogin Rangitata na Upper an san shi da ɗayan mahimman wuraren zama na kogin don ƙaƙƙarfan ƙaƙƙarfan bakin gaba, wrybill da sararin samaniya mai haɗari ga galaxias mai tsayi.

In February 2010, didymo was detected in the Waimakariri River.

A watan Mayu na shekara ta 2010, an gano didymo a cikin Kogin Riuwaka, Kogin Pearse da Kogin Maruia a yankin Nelson-Tasman a saman Tsibirin Kudancin.

 Hana yaduwar 
MAF Biosecurity New Zealand ta ba da shawarar hanyoyin da ke biyowa don hana yaduwar didymo a New Zealand: 

Bincike: Kafin barin kogin, cire duk ƙullun algae a bayyane kuma ku nemi kumburi na ɓoye. Bar su a wurin. Idan kun sami dunƙule daga baya kada ku wanke su cikin magudanar ruwa, ku bi su da hanyoyin da aka yarda da su a ƙasa, bushe su kuma saka su a cikin kwandon shara.

Tsabtace: Tsabtacewa da kuma share duk abubuwa na akalla minti daya a cikin ruwa mai zafi (60 ° C), mafita ta 2% na bleach na gida ko mafita ta 5% na gishiri, mai tsabtace hannu ko wanki.

Dry: Idan tsaftacewa ba ta da amfani (misali dabbobi, dabbobi), bayan abu ya bushe gaba ɗaya jira ƙarin awanni 48 kafin tuntuɓar ko amfani a kowane hanyar ruwa.

 Dubi kuma 

 Dabbobi masu mamayewa a New Zealand
 Karewa a New Zealand

 Bayanan da aka ambata 

 Haɗin waje 

  a Ma'aikatar Masana'antu ta Farko
 Shafin Didymo a Ma'aikatar Karewa