13 Works

Geological mapping and structural analysis from combined field mapping, GPS surveying, photogrammetry and 3D modelling at Crawford Knob, Franz Josef, New Zealand

Matthew P. Hill, Susan M. Ellis, Timothy A. Little & Kirby R. D. MacLeod
Survey work using real-time kinematic (RTK) GPS in tandem with a remotely piloted aircraft system (RPAS) has resulted in detailed surface and structural models of a glaciated outcrop at Crawford Knob near Franz Josef Glacier in the Southern Alps of New Zealand. Crawford Knob is located ~8 km from Franz Josef township on the north-eastern side of the Franz Josef Glacier and exposes structures that were interpreted to have been deformed at ~20 km depth...

Reintroduced wolves and hunting limit the abundance of a subordinate apex predator in a multi-use landscape

L. Mark Elbroch, Jake Ferguson, Howard Quigley, Derek Craighead, Daniel Thompson & Heiko Wittmer
Top-down effects exhibited by apex predators are modulated by human impacts on community composition and species abundances. For these reasons, research supporting strong top-down effects of apex predators occurs almost entirely within protected areas rather than the much more common multi-use landscapes dominating modern ecosystems. Based on 16 years of monitoring, we developed an integrated population model to disentangle the concurrent contributions of a reintroduced apex predator, the gray wolf, human hunting, and prey abundances...

Lunar rhythms in growth of larval fish

Jeffrey S. Shima, Craig W. Osenberg, Erik G. Noonburg, Suzanne H. Alonzo & Stephen E. Swearer
Growth and survival of larval fishes is highly variable and unpredictable. Our limited understanding of this variation constrains our ability to forecast population dynamics and effectively manage fisheries. Here we show that daily growth rates of a coral reef fish (the sixbar wrasse, Thalassoma hardwicke) are strongly lunar-periodic and predicted by the timing of nocturnal brightness: growth was maximized when the first half of the night was dark and the second half of the night...

Data from: Dermal denticle assemblages in coral reef sediments correlate with conventional shark surveys

Erin Dillon, Kevin Lafferty, Douglas McCauley, Darcy Bradley, Richard Norris, Jennifer Caselle, Graziella DiRenzo, Jonathan Gardner & Aaron O'Dea
It is challenging to assess long-term trends in mobile, long-lived, and relatively rare species such as sharks. Despite ongoing declines in many coastal shark populations, conventional surveys might be too fleeting and too recent to describe population trends over decades to millennia. Placing recent shark declines into historical context should improve management efforts as well as our understanding of past ecosystem dynamics. A new paleoecological approach for surveying shark abundance on coral reefs is to...

Wavelet filters for automated recognition of birdsong in long-time field recordings

Nirosha Priyadarshani, Stephen Marsland, Julius Juodakis, Isabel Castro & Virginia Listanti
1. Ecoacoustics has the potential to provide a large amount of information about the abundance of many animal species at a relatively low cost. Acoustic recording units are widely used in field data collection, but the facilities to reliably process the data recorded -- recognising calls that are relatively infrequent, and often significantly degraded by noise and distance to the microphone -- are not well developed yet. 2. We propose a call detection method for...

Data from: Koe: Web-based software to classify acoustic units and analyse sequence structure in animal vocalisations

Yukio Fukuzawa, Wesley H. Webb, Michelle M. Roper, Stephen Marsland, Dianne H. Brunton, Andrew Gilman & Matthew D. M. Pawley
1. Classifying acoustic units is often a key step in studying repertoires and sequence structure in animal communication. Manual classification by eye and ear remains the primary method, but new tools and techniques are urgently needed to expedite the process for large, diverse datasets. 2. Here we introduce Koe, an application for classifying and analysing animal vocalisations. Koe offers bulk-labelling of units via interactive ordination plots and unit tables, as well as visualisation and playback,...

Investigations of past earthquakes on the Titri Fault, coastal Otago, New Zealand

David J. A. Barrell, Nicola J. Litchfield, Russ J. Van Dissen, N. Wang, B. I. Taylor SIlva, S. Hornblow & Mark W. Stirling
The Titri Fault is a major southeast-dipping reverse fault in coastal Otago, southwest of Dunedin. The fault is up to 90 km long and has uplifted the coastal hills between Dunedin and Balclutha. Activity on the Titri Fault was previously poorly constrained, and the fault has not previously been included in the New Zealand National Seismic Hazard Model (NSHM). Two suspected fault scarps were identified on alluvial fans along the Titri Fault and were investigated...

Seismogenesis at Hikurangi Integrated Research Experiment (SHIRE) onshore seismic acquisition field report

Katie Jacobs, Stuart A Henrys, D Okaya, H Van Avendonk, Jenny Black, Dan H. N. Barker, Sapthala C Karalliyadda, E Kurashimo, Wanda R. Stratford, M Savage, R Sullivan, Zane R. Bruce & L Hughes
This report documents the acquisition and archiving of a major controlled source and passive seismic imaging project, the Seismogenesis Hikurangi Integrated Research Experiment (SHIRE). The SHIRE project aims to identify and quantify factors controlling the long-term evolution of the Hikurangi margin and the mode of slip along the subduction megathrust. The components of the data volume were acquired in two phases; between October 2017 – April 2018 (SHIRE I) and February–March 2019 (SHIRE II). The...

Re-thinking Contextualisation in Solomon Islands school leadership professional learning and development

Kabini Sanga, Jack Maebuta, Seu’ula Johansson-Fua & Martyn Reynolds
Pacific Dynamics: Journal of Interdisciplinary Research (ISSN: 2463-641X), Volume 4, Number 1, March 2020.

Data from: Spatial scaling of beta diversity in the shallow marine fossil record

Tom Womack
Beta diversity quantifies the spatial structuring of ecological communities and is a fundamental partition of biodiversity, central to understanding many macroecological phenomena in modern biology and paleobiology. Despite its common application in ecology, studies of beta diversity in the fossil record are limited, particularly at regional spatial scales that are important for understanding macroevolutionary processes. The spatial scaling of beta diversity in the fossil record is poorly understood, but has significant implications due to temporal...

Environmental DNA can act as a biodiversity barometer of anthropogenic pressures in coastal ecosystems

Joseph DiBattista, James Reimer, Michael Stat, Giovanni Masucci, Piera Biondi, Maarten De Brauwer, Shaun Wilkinson, Anthony Chariton & Michael Bunce
Loss of biodiversity from lower to upper trophic levels reduces overall productivity and stability of coastal ecosystems in our oceans, but rarely are these changes documented across both time and space. The characterisation of environmental DNA (eDNA) from sediment and seawater using metabarcoding offers a powerful molecular lens to observe marine biota and provides a series of ‘snapshots’ across a broad spectrum of eukaryotic organisms. Using these next-generation tools and downstream analytical innovations including machine...

Data from: Environmental context shapes the long‐term role of nutrients in driving producer community trajectories in a top‐down dominated marine ecosystem

Rachel Clausing, Nicole E. Phillips & Peggy Fong
1. Two predominant anthropogenic impacts on ecosystems, nutrient enrichment and the removal of consumers, are predicted to interact in their effects on producer diversity. Yet, measures of diversity alone may not capture changes occurring in the underlying mechanisms structuring communities. Furthermore, evidence for these interactions in rocky intertidal systems is mixed and may be confounded by variable baseline productivity or short experimental durations that do not capture seasonality, environmental heterogeneity or successional processes. 2. We...

Genetic diversity and connectivity of southern right whales (Eubalaena australis) found in the Brazil and Chile–Peru wintering grounds and the South Georgia (Islas Georgias del Sur) feeding ground

Emma L Carroll, Paulo Ott, Louise McMillan, Bárbara Galletti Vernazzani, Petra Neveceralova, Els Vermeulen, Oscar Gaggiotti, Artur Andriolo, C. Scott Baker, Connor Bamford, Peter Best, Elsa Cabrera, Susannah Calderan, Andrea Chirife, Rachel M. Fewster, Paulo A. C. Flores, Timothy Frasier, Thales R. O. Freitas, Karina Groch, Pavel Hulva, Amy Kennedy, Russell Leaper, Mathew S. Leslie, Michael Moore, Larissa Oliviera … & Jennifer A Jackson
As species recover from exploitation, continued assessments of connectivity and population structure are warranted to provide information for conservation and management. This is particularly true in species with high dispersal capacity, such as migratory whales, where patterns of connectivity could change rapidly. Here we build on a previous long-term, large-scale collaboration on southern right whales (Eubalaena australis) to combine new (nnew) and published (npub) mitochondrial (mtDNA) and microsatellite genetic data from all major wintering grounds...

Registration Year

  • 2020
    13

Resource Types

  • Dataset
    9
  • Text
    4

Affiliations

  • Victoria University of Wellington
    13
  • GNS Science
    2
  • Massey University
    2
  • University of the South Pacific
    1
  • University of Newcastle Australia
    1
  • University of Pretoria
    1
  • The University of Texas at Austin
    1
  • University of Georgia
    1
  • Oregon State University
    1
  • Saint Mary's University
    1