Rotorua Lakes Symposium 2017

TROUBLE MAKERS: Catfish, Lakeweeds and Nutrients - Complex Lake Systems Restoration

2 Day Symposium

Thursday 31 August and Friday 1 September 2017

Millennium Hotel, Rotorua

EDITOR'S NOTE
FOREWORD - ROTORUA LAKES SYMPOSIUM
KEY NOTE SPEAKERS
PROGRAMME
ANNUAL MAYORAL SPEAKER FORUM : SUSTAINABILITY
CLOSING COMMENTS

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Recent Submissions

  • Publication
    Session 6: The eight lakes of Tarawera- Introduction
    (Conference Contribution, LakesWater Quality Society, 2017) Webber, Warren; McLean, Ian G.
    Introduction of Session 6: The eight lakes of Tarawera
  • Publication
    Chemical control of lake weeds
    (Conference Contribution, LakesWater Quality Society, 2017) Wells, Rohan
    I am going to talk about aquatic herbicides or chemical control and look at the range of aquatic herbicides that have already been tested or to be tested. We will look at diquat and endothall, address the knowledge and use gaps and give an update on endothall and then look at the future.
  • Publication
    Deoxygenation impacts of lake weed
    (Conference Contribution, LakesWater Quality Society, 2017) Gibbs, Max M.; Howard-Williams, Clive
    This talk came about from a series of questions that were asked at a TAG meeting in May 2016. These included: 1) What are the consequences of invasive weed growth? 2) What is the succession of species invasion and will it get worse? 3) What are the risks associated with these invasive weeds spreading? 4) What are native aquatic species of the littoral zone and their values? 5) What are the impacts of the associated water clarity improvements on weed? 6) What are possible control measures/options/experience/typical costs and challenges? 7) What are the current BOPRC monitoring programmes? (i) Lakes SPI; what does this mean? Incursion monitoring? (ii) How do we compare with other regions? Can we improve? 8) What are the agencies involved and their current actions?
  • Publication
    Lake biosecurity - Local actions and results
    (Conference Contribution, LakesWater Quality Society, 2017) Lass, Hamish
    Thank you, I keep my biography short and sharp and probably should add that in a cruel twist I was born the year hornwort first invaded Lake Rotorua. I have been working from the Rotorua office for 11 years as a biosecurity officer focusing mainly on freshwater biosecurity.
  • Publication
    Session 1: Scene setting
    (Conference Contribution, LakesWater Quality Society, 2017)
    Session 1 Screen setting
  • Publication
    Programme - 2017 Lakeswater Quality society symposium
    (Conference Contribution, LakesWater Quality Society, 2017)
    The programme of 2017 Lakeswater Quality society symposium
  • Publication
    Key note speakers
    (Conference Contribution, LakesWater Quality Society, 2017)
    Introductions of key note speakers
  • Publication
    Editor's note - Lakeswater Quality society 2017 Symposium proceedings
    (Conference Contribution, LakesWater Quality Society, 2017) Green, Ann
    Editor's note
  • Publication
    Closing comments
    (Conference Contribution, LakesWater Quality Society, 2017)
    Closing comments of LakesWater Quality Society Symposium 2017
  • Publication
    Session 7 Discussions
    (Conference Contribution, LakesWater Quality Society, 2017)
    Discussions in Session 7
  • Publication
    Next Foundation: Perspective on funding
    (Conference Contribution, LakesWater Quality Society, 2017) Hania, Jan
    I want to give a background on the NEXT Foundation, how we came to exist, a bit of a repeat on what Nicki Douglas covered this morning on collective impact and how to get that at scale. I will then talk about how we are trying to implement that in some of our projects around the country. I will also look at our investment portfolio on healthy rivers, which we have not really started yet, but ideas on how we get to that place as well.
  • Publication
    The cost of aquatic weed control in the Rotorua Te Arawa Lakes
    (Conference Contribution, LakesWater Quality Society, 2017) Champion, Paul; Wells, Rohan
    We will present information on the costs of aquatic weed control in the Rotorua, Te Arawa Lakes and thank all of the people who have willingly given us their estimated costs. Hopefully, this provides guidance on what current activities cost and what future scenarios might be feasible.
  • Publication
    Lake Tarawera - The costs of P mitigation and pest control
    (Conference Contribution, LakesWater Quality Society, 2017) Corbett, Greg; Paterson, John
    Firstly, we have been asked to talk about the costs of mitigating P in the Tarawera catchments. It is reasonably well understood that farming activities can lead to phosphorus loss if they are not managed properly. Recent studies have also shown the possible links between pests and phosphorus loss in forested catchments. John and I will give this presentation in two parts. I will talk about pests and then John will move to farming. Neither of us will predict how much phosphorus could be managed nor comment on the cost-effectiveness of any actions. We simply attempt to provide ballpark figures for work that could reduce phosphorus losses to the lakes to some degree.
  • Publication
    Clean lakes - What value? What cost?
    (Conference Contribution, LakesWater Quality Society, 2017) Mueller, Hannah
    Kia ora everyone and thank you so much for making it back to the last session of this wonderful symposium. Thank you so much to the LakesWater Quality Society for inviting me here to speak today. I am excited by the opportunity to share with you some of the findings of my PhD research that I finished earlier this year.
  • Publication
    Farmer perspective
    (Conference Contribution, LakesWater Quality Society, 2017) Sutton, Chris
    We are beef farmers now. We went to the Rerewhakaaitu area as dairy farmers and four years ago, on 23 September 2013, we sold the dairy cows and moved into a beef unit. We have been a beef unit ever since on 100 hectares. When we first got married, Rosemary was a nurse from Te Whaiti and we both decided to own a lifestyle block either at Kaharoa or Rerewhakaaitu and ended up buying at Rerewhakaaitu in a roundabout fashion.
  • Publication
    The nutrient impacts of forestry
    (Conference Contribution, LakesWater Quality Society, 2017) Beets, Peter
    I have been working on New Zealand’s Land Use and Carbon Analysis System (LUCAS) for the Ministry for the Environment to quantify carbon stocks and changes for planted and natural forests. I originally started at Scion when it was called the Forest Research Institute working on tree nutrition. It is relevant for me to discuss this topic now because after we put the carbon models together I was able to come back to tree nutrition. I was amazed to find the papers we published years ago were still in journals and not incorporated into models that we could use for tree nutrition. I suggested to the managers that it was time for me to put away administrative things and managing projects and focus on reading all those publications, not just from Scion, but other agencies too and put them into models.
  • Publication
    Case study - Hunua 1080 project
    (Conference Contribution, LakesWater Quality Society, 2017) Ward, Mace; Kelleher, Rachel
    Thank you very much for the welcome. You will notice that there is more than one of us. I am very pleased to have one of the real people who led the case study that we will talk about. Rachel Kelleher is the Manager of our Regional Parks in Auckland, all 27 regional parks across 40,000 hectares with 6 million visitors. The Hunua Ranges (Kohukohunui) regional parkland is what this case study focuses on.
  • Publication
    1080 and the fight to save New Zealand's wildlife
    (Conference Contribution, LakesWater Quality Society, 2017) Hansford, Dave
    I grinned when I saw the title of the symposium was ‘Troublemakers’. I am here because I wrote ‘Protecting Paradise’ and in it I looked at the science around 1080. I explored some of the popular myths and fallacies around 1080, those intractable fallacies that do not go away. I was so intrigued that much to my editor’s concern I decided to find out why they are so intractable. Believe me that is a rabbit hole and I am going to take you as far down it as I can in 20 minutes.
  • Publication
    The impact of 1080 on aquatic ecology
    (Conference Contribution, LakesWater Quality Society, 2017) Suren, Alastair
    I was at NIWA in Christchurch before coming north to the Bay of Plenty Regional Council. I became involved with the following studies as a result of what could best be described as a low-key assessment of a 1080 drop on the West Coast with the West Coast Regional Council. Following this low key assessment, I approached the Animal Health Board to conduct some more robust studies to answer the very important question, ‘What effect does 1080 have on aquatic ecosystems?’ I eventually did five studies while at NIWA, which were all funded by the Animal Health Board, and it is these studies that I will now discuss.
  • Publication
    The cultural perspective: Lakeweed and pest animals
    (Conference Contribution, LakesWater Quality Society, 2017) Douglas, Nicki
    I have been with the Department of Conservation for about 15 years now and worked in Rotorua for 11 of those 15 years in various roles. I was lucky enough to be the Operations Manager for Lake Tarawera so I have a very strong association from a practitioner perspective. Practitioner is probably the key word for me. Most of my korero today will be based on experience and practice in working with communities and that is my area of expertise. I will talk about collective impact. It does say that I am talking about lake weeds and pests and I will mention them at least twice.