I'm flabbergasted this doco doesn't address/focus on the root cause of mangrove spread - increased sedimentation. I'm all for mangrove management, but removing them without addressing the issue causing their spread is no solution. Would be great to see a follow up looking at landuse and catchment management, and restoration goals more focused on a healthy harbour and functioning ecosystem, than recreation/property values.
I remember visiting my Maternal Grandfather Howard Matthews of Riverbank Farm just west of the causeway on the south side in the mid 60’s. There were few mangroves above the causeway at that stage and none off his property as he would pull them out. By the 70’s there were a lot more, he had moved to his nearby retirement property by then. When we moved to Northland in the 90’s I could not believe how much they had taken over the harbour.. It looks so much better below the causeway with them gone - keep up the good work. David
Excellent analysis of what's happening to Mangawhai Harbour. As a previous resident, I'm very pleased to see people fighting to preserve this wonderful, natural environment.
Thank you for producing this informative and scenic documentary. Well done. I haven't observed any climate change affects to the harbour and dont expect to in the future, so we can safely detract that nonsense from the equation. 😀
Good on you Mangawhai, get rid of the waterway clogging Mangrove menace. Puhoi river and estuary a real mess, Point Wells and the upper Omaha harbour becoming choked, previously sandy areas disappearing as you watch, look to the old photos of these areas, Mangroves produce a toxic environment.
I raised my kids in Mangawhai… and I can tell you with a long family history and photos going back generations, the mangroves only took over the harbour when the causeway went through and indeed changed the ecology of the place irreparably. Big Kingy and schools and schools of fish used to frequent the harbour with healthy shellfish beds and clean water… and it’s true that when my husband was at school, they took the kids to an iron bar/pipe for swimming lessons and stories of fish and seahorses were many. The politics of this situation is shameful and ridiculous. The mangroves don’t belong in the Mangawhai harbour.
If they remove the Mangroves they will need to ensure that the land at the edge of the foreshore is planted with smaller coastal flora . The silt is still going to go into the harbour rather than settling amongst the roots of the mangroves. Fotuntely farming is not as extensive in Mangawhai as it once was and people are aware of planting riparian areas to manage the silt. I do enjoy mangrove forests however they definately managing i remember fishing in estuaries in West Auckland in the early70's and the mangroves were there but only along the edges of the channels but by the late 70's the tipping point was crossed and they exploded and entire bare mudflats were covered. So many factors involved . Floating catch nets hung off the bridge that have gussets and only sit 5 to 10 cm into the water might work to catch all the seed pods {that generally float.} to stop the spread Good doco.
@@simon-ds1vp Yes it will shift but transfers the problen through to water quality which affects scallops etc further out in the ocean. we are already seeing issues with marine life such as milky flesh in fish due to aledged starvation. The spring pilcahrd run in the gulf which coincides with snppper spawning is only half the volume it used to be. Baitfish numbers are down and that is a result of poor water quality affecting the plankton the bait fish feed on and it affects things further along the food chain. Planting is still required to manage silt run off. This along with fertilzer was the instigator of the issue. Mangrove explosion was and is the canary in the cage identifying the wider issue created from clearing the land and farming. BTW I have no issue with farming. We have to eat and the country needs the money but a a bit of an improvement in land management is required.
focusing , convieniently , on the consequence , rather than the cause. why dont you go upstream and challenge all the farmers and their practices. if you fix them , the mangroves will readjust to their original extent. I am sceptical that this video has un-revealed motivations. Fix the farmers. Or get the farmers to pay for the restoration.
Spent a lot of time on Paddle board, amongst mangroves, always noticed the amount if fish life amongst them . Not one voice amongst these experts, giving the reasons why the proliferation. Nature trying mend the mess humans have made & then the economic reasoning comes to the fore !!!.
I watched the video in full, there are voices that give reasons. Yes humans have created the problem, I'm proud of all those that work to help nature restore what once was.
I agree the mangroves are like a nursery for fish. Seems like humans have done something wrong and now more sediment is filling estuary along with nitrates polution etc also warmer water the mangroves are natures own fix. Think it's just beach front property owners that got interviewed and they are annoyed they can't legally remove mangroves.
I wholeheartedly disagree. I have also spent a lot of time kayaking around the mangrove area, and they are dead. Almost no fish at all amongst them. You will still find a few mullet and flounder in the channels, but in and around the mangroves, nothing. The supposed fact that mangroves are a breeding ground for sealife is nonsense. They completely stifle life.
Global warming is a major factor! 😂😂😂 i remember swimming out on my board! No global warming! Obviously bridges create catchment areas of silt so mangroves can grow! Look at every place man has put in bridges the flow has been reduced, its not a big deal
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
Every new comer to Mangawhai who has been here less than 20 years NEEDS to see this.
I'm flabbergasted this doco doesn't address/focus on the root cause of mangrove spread - increased sedimentation. I'm all for mangrove management, but removing them without addressing the issue causing their spread is no solution.
Would be great to see a follow up looking at landuse and catchment management, and restoration goals more focused on a healthy harbour and functioning ecosystem, than recreation/property values.
I remember visiting my Maternal Grandfather Howard Matthews of Riverbank Farm just west of the causeway on the south side in the mid 60’s. There were few mangroves above the causeway at that stage and none off his property as he would pull them out. By the 70’s there were a lot more, he had moved to his nearby retirement property by then. When we moved to Northland in the 90’s I could not believe how much they had taken over the harbour.. It looks so much better below the causeway with them gone - keep up the good work.
David
Excellent analysis of what's happening to Mangawhai Harbour. As a previous resident, I'm very pleased to see people fighting to preserve this wonderful, natural environment.
Excellent informative documentary.
Thank you for producing this informative and scenic documentary. Well done.
I haven't observed any climate change affects to the harbour and dont expect to in the future, so we can safely detract that nonsense from the equation. 😀
Great video explaining in detail what needs to be done Thanks!
Good on you Mangawhai, get rid of the waterway clogging Mangrove menace.
Puhoi river and estuary a real mess, Point Wells and the upper Omaha harbour becoming choked, previously sandy areas disappearing as you watch, look to the old photos of these areas, Mangroves produce a toxic environment.
I raised my kids in Mangawhai… and I can tell you with a long family history and photos going back generations, the mangroves only took over the harbour when the causeway went through and indeed changed the ecology of the place irreparably. Big Kingy and schools and schools of fish used to frequent the harbour with healthy shellfish beds and clean water… and it’s true that when my husband was at school, they took the kids to an iron bar/pipe for swimming lessons and stories of fish and seahorses were many.
The politics of this situation is shameful and ridiculous.
The mangroves don’t belong in the Mangawhai harbour.
Great doc
Only reason you don't want mangroves is you want white sand beachs in the harbor to increase your house prices.
If they remove the Mangroves they will need to ensure that the land at the edge of the foreshore is planted with smaller coastal flora . The silt is still going to go into the harbour rather than settling amongst the roots of the mangroves. Fotuntely farming is not as extensive in Mangawhai as it once was and people are aware of planting riparian areas to manage the silt. I do enjoy mangrove forests however they definately managing i remember fishing in estuaries in West Auckland in the early70's and the mangroves were there but only along the edges of the channels but by the late 70's the tipping point was crossed and they exploded and entire bare mudflats were covered. So many factors involved . Floating catch nets hung off the bridge that have gussets and only sit 5 to 10 cm into the water might work to catch all the seed pods {that generally float.} to stop the spread Good doco.
remove mangroves and the harbours flush the silt naturally,
@@simon-ds1vp Yes it will shift but transfers the problen through to water quality which affects scallops etc further out in the ocean. we are already seeing issues with marine life such as milky flesh in fish due to aledged starvation. The spring pilcahrd run in the gulf which coincides with snppper spawning is only half the volume it used to be. Baitfish numbers are down and that is a result of poor water quality affecting the plankton the bait fish feed on and it affects things further along the food chain. Planting is still required to manage silt run off. This along with fertilzer was the instigator of the issue. Mangrove explosion was and is the canary in the cage identifying the wider issue created from clearing the land and farming. BTW I have no issue with farming. We have to eat and the country needs the money but a a bit of an improvement in land management is required.
Interesting
Mangrove are overrated sea gorse
Cyclone Bola was 1988 not 1990
No mangroves aren't the problem. People are!
Leave the mangroves alone fish breed in them.
Didn’t you watch this?
focusing , convieniently , on the consequence , rather than the cause. why dont you go upstream and challenge all the farmers and their practices. if you fix them , the mangroves will readjust to their original extent. I am sceptical that this video has un-revealed motivations. Fix the farmers. Or get the farmers to pay for the restoration.
I blame the education system
Spent a lot of time on Paddle board, amongst mangroves, always noticed the amount if fish life amongst them . Not one voice amongst these experts, giving the reasons why the proliferation. Nature trying mend the mess humans have made & then the economic reasoning comes to the fore !!!.
I watched the video in full, there are voices that give reasons. Yes humans have created the problem, I'm proud of all those that work to help nature restore what once was.
I agree the mangroves are like a nursery for fish. Seems like humans have done something wrong and now more sediment is filling estuary along with nitrates polution etc also warmer water the mangroves are natures own fix. Think it's just beach front property owners that got interviewed and they are annoyed they can't legally remove mangroves.
I wholeheartedly disagree. I have also spent a lot of time kayaking around the mangrove area, and they are dead. Almost no fish at all amongst them. You will still find a few mullet and flounder in the channels, but in and around the mangroves, nothing. The supposed fact that mangroves are a breeding ground for sealife is nonsense. They completely stifle life.
The mangroves go dry at low tide. Not very conducive for fish to breed in.
Global warming is a major factor! 😂😂😂 i remember swimming out on my board! No global warming! Obviously bridges create catchment areas of silt so mangroves can grow! Look at every place man has put in bridges the flow has been reduced, its not a big deal
Mangroves aren't the problem, mediocrity is