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Edna) Analyses in Two New Zealand-Based Case Studies http://researchcommons.waikato.ac.nz/ Research Commons at the University of Waikato Copyright Statement: The digital copy of this thesis is protected by the Copyright Act 1994 (New Zealand). The thesis may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use: Any use you make of these documents or images must be for research or private study purposes only, and you may not make them available to any other person. Authors control the copyright of their thesis. You will recognise the author’s right to be identified as the author of the thesis, and due acknowledgement will be made to the author where appropriate. You will obtain the author’s permission before publishing any material from the thesis. Assessing the use of molecular techniques to determine terrestrial invertebrate diversity in New Zealand mangroves and detection of blue ducks in New Zealand streams A thesis submitted in partial fulfilment of the requirements for the degree of Masters of Science in Biological Sciences at The University of Waikato by Erin Jane Doyle _________ 2015 Abstract Biodiversity monitoring requires reliable methods for species detection and identification. Here, I examine the use of molecular approaches, including mitochondrial DNA sequencing (barcoding) and environmental DNA (eDNA) analyses in two New Zealand-based case studies. In the first study, I used DNA barcoding to assess the diversity of arthropods collected from the mangroves within RAMSAR protected wetland area in the Firth of Thames, New Zealand. Over one year, a total of 9829 individuals were collected and of these 251 were sequenced. COI sequences were largely congruent with morphogroup designations. The sequences formed 101 putative species, 39% of which contained specimens from outside of New Zealand. 44% of the putative species found at the Thames sites had not been previously found in an inland habitat. I conclude that the terrestrial arthropod community of the mangrove forest in the Firth of Thames is distinctly different from other New Zealand habitats, and may include species not found elsewhere. In the second study, I examined the use of environmental DNA (eDNA) as a tool for detecting the presence of New Zealand’s endemic blue duck, or whio, (Hymenolaimus malacorhynchos) in rivers, through water sampling. Species specific primers were designed to target a section of the mitochondrial control region. Water samples were collected from running water within artificial blue duck habitats using an in situ filtration system, eDNA was then extracted from the filter. Any blue duck DNA present in the sample was selectively amplified using the species specific primers. This allowed for blue ducks to be detected through sequencing of the PCR product. In 66% of these cases, it was possible to detect blue duck DNA from the filtered water i samples. On this basis, I conclude that there is sufficient “proof of concept” to warrant further investigation into the methods developed here, specifically, the testing of samples from natural environments, in which the presence of H. malacorhynchos has been confirmed by traditional methods. ii Acknowledgements I thank the University of Waikato summer scholarship program and the National Wetland Trust for the scholarships which helped me through my master degree. Thank you also to the Department of Conservation and the Blue Duck Trust for the support of my research. I am grateful to my supervisor, Ian Hogg, for this opportunity. Thank you for letting me figure things out on my own and for encouraging me to present at conferences. Thank you also to Jonathan Banks and Ian Duggan, for answering my string of email questions. I am also grateful to Chrissen Gemmill for always taking an interest in what I was doing and offering advice, even though I wasn’t her student. Science is a team effort, even when you are working alone. I learned so much from talking to my fellow students, particularly the other PBRLeans. Thank you for letting me bounce ideas off you, listening to my poetry, for helping me out when I found a bunny, and a kitten, in the street. And, for not letting me die when we went tramping in the Karangahake Gorge. I would like to thank the people, staff and students, of the University of Waikato. When I was five, I wanted to be a scientist and a writer, but during my school years I was taught that I was stupid, and I lost my way. Over the past six and a half years at the University of Waikato, I have learned that I am capable of far more than I ever knew. I have earned scholarships and discovered a passion for iii teaching. I have made amazing friends, some for a semester, others for life, and I have realized that I can be insanely brave. This is thanks to the people I met along the way, for the opportunities you gave me, the friendship you offered, and your complete lack of surprise that I wasn’t stupid. Thank you for the references, awards, the coffees, and lunch dates. The crochet and the hugs. For not letting me be the only one on the dance floor. Thank you, for everything. I would like to thank my friends from the English Department. And Write Club, who have been a long suffering and sympathetic ear throughout my masters, while providing just the right amount of distraction. Thank you for telling me everything was going to be okay when I had my mid-degree cancer scare. And for carrying equipment, and sitting with me while I collected water samples (I’m sorry about the sunburn). You gave me a way of being a writer while learning how to be scientist, and half of me would be lost without you. Lastly, I would like to thank my family. My family, who had me watching National Geographic as a toddler, who let me bring home rocks, leaves and bones. Who taught me about animals, from Clydesdales and finches to tropical fish and mice. Who taught me to listen to bird calls, and to be quiet in the bush. Who taught me about conservation, and then how to tie my shoes. iv Table of Contents Abstract .................................................................................................................... i Acknowledgements ................................................................................................ iii Table of Contents .................................................................................................... v List of Tables......................................................................................................... vii List of Figures ...................................................................................................... viii List of Appendices ................................................................................................. ix Chapter I: Thesis Introduction ................................................................................ 1 Literature cited .................................................................................................. 10 Chapter II: Assessing the diversity of terrestrial invertebrates in mangrove forests at Thames, North Island, New Zealand ......................................... 16 Introduction ....................................................................................................... 17 Materials and Methods ...................................................................................... 19 Sampling sites ................................................................................................ 19 Sample collection ........................................................................................... 20 Specimen Identification ................................................................................. 21 Results ............................................................................................................... 27 Discussion ......................................................................................................... 32 Acknowledgements ........................................................................................... 36 Literature cited .................................................................................................. 37 Chapter III: Detecting New Zealand blue ducks (Hymenolaimus malacorhynchos) using environmental DNA (eDNA) ............................. 41 Introduction ....................................................................................................... 42 Materials and Methods ...................................................................................... 45 Primer design, specificity and sensitivity ...................................................... 45 Field sampling ............................................................................................... 47 Isolation of eDNA .......................................................................................... 49 Results ............................................................................................................... 54 v Primer design and sensitivity ......................................................................... 54 Environmental DNA Samples ....................................................................... 55 Discussion ......................................................................................................... 59 Acknowledgements ........................................................................................... 62 Literature cited .................................................................................................. 63 Chapter IV:
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