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Journal articles on the topic 'Estuarine hydrology New Zealand'

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Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

CULLEN, DAVID J., G. A. CHALLIS, and G. W. DRUMMOND. "Late Holocene estuarine phosphogenesis in Raglan Harbour, New Zealand." Sedimentology 37, no. 5 (October 1990): 847–57. http://dx.doi.org/10.1111/j.1365-3091.1990.tb01829.x.

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2

Collins, Daniel B. G. "New Zealand River Hydrology under Late 21st Century Climate Change." Water 12, no. 8 (August 1, 2020): 2175. http://dx.doi.org/10.3390/w12082175.

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Climate change is increasingly affecting the water cycle and as freshwater plays a vital role in countries’ societal and environmental well-being it is important to develop national assessments of potential climate change impacts. Focussing on New Zealand, a climate-hydrology model cascade is used to project hydrological impacts of late 21st century climate change at 43,862 river locations across the country for seven hydrological metrics. Mean annual and seasonal river flows validate well across the whole model cascade, and the mean annual floods to a lesser extent, while low flows exhibit a large positive bias. Model projections show large swathes of non-significant effects across the country due to interannual variability and climate model uncertainty. Where changes are significant, mean annual, autumn, and spring flows increase along the west and south and decrease in the north and east. The largest and most extensive increases occur during winter, while during summer decreasing flows outnumber increasing. The mean annual flood increases more in the south, while mean annual low flows show both increases and decreases. These hydrological changes are likely to have important long-term implications for New Zealand’s societal, cultural, economic, and environmental well-being.

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3

Roper, David. "Benthos associated with an estuarine outfall, Tauranga Harbour, New Zealand." New Zealand Journal of Marine and Freshwater Research 24, no. 4 (December 1990): 487–98. http://dx.doi.org/10.1080/00288330.1990.9516440.

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4

Gibbs, M. M. "Morphometrically induced estuarine phytoplankton patchiness in Pelorus Sound, New Zealand." New Zealand Journal of Marine and Freshwater Research 27, no. 2 (June 1993): 191–99. http://dx.doi.org/10.1080/00288330.1993.9516557.

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5

Van Maanen, Barend, Giovanni Coco, Andrew Swales, and Karin R. Bryan. "The role of biomorphodynamics in estuarine evolution in New Zealand." New Zealand Geographer 64, no. 2 (August 2008): 162–64. http://dx.doi.org/10.1111/j.1745-7939.2008.00141.x.

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6

Kennedy, D. M., and R. Paulik. "Estuarine shore platforms in Whanganui Inlet, South Island, New Zealand." Geomorphology 88, no. 3-4 (August 2007): 214–25. http://dx.doi.org/10.1016/j.geomorph.2006.11.007.

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7

Woods, Josephine L. D., and David M. Kennedy. "The measurement of modern sedimentation in estuarine environments in New Zealand." New Zealand Geographer 67, no. 1 (April 2011): 39–50. http://dx.doi.org/10.1111/j.1745-7939.2011.01196.x.

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8

Plew, David R., John R. Zeldis, Ude Shankar, and Alexander H. Elliott. "Using Simple Dilution Models to Predict New Zealand Estuarine Water Quality." Estuaries and Coasts 41, no. 6 (March 13, 2018): 1643–59. http://dx.doi.org/10.1007/s12237-018-0387-6.

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9

Stevens, Craig L. "Turbulence in an estuarine embayment: Observations from Beatrix Bay, New Zealand." Journal of Geophysical Research: Oceans 108, no. C2 (February 2003): n/a. http://dx.doi.org/10.1029/2001jc001221.

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10

Kirk, R. M., R. K. Morgan, M. B. Single, and B. Fahey. "Applied physical geography in New Zealand." Progress in Physical Geography: Earth and Environment 23, no. 4 (December 1999): 525–40. http://dx.doi.org/10.1177/030913339902300404.

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Physical geographers in New Zealand have a tradition of applied research in a variety of contexts, including environmental management as well as soil, vegetation and landform systems conservation. In recent years this work has been given new impetus (with the promise of even greater involvement) as a result of economic restructuring at the national level, restructuring of government departments and agencies dealing with environmental and resource management and conservation, the introduction of new statutes relating to environmental and resource management, and major changes in the funding and management of science research in the public sector. This article provides an overview of the institutional environment within which New Zealand physical geographers now carry out applied work. The contemporary resource management and legislative contexts are described and structural changes that have taken place in New Zealand science over the last decade are reviewed. Research undertaken by the authors or their research students provides examples of the different types of work now being undertaken by physical geographers in New Zealand under the new legislative and funding regimes. Two examples are described in detail. The first is drawn from research dealing with catchment hydrology and water supply and has been undertaken by a physical geographer employed by Landcare Research, a Crown-owned research company. The second comes from work carried out by two university-based physical geographers into the environmental effects on coasts of a new mode of marine passenger transport (`fast ferries'), to meet the requirements of new environmental legislation.

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11

Barrett, Patrick, Priya Kurian, Naomi Simmonds, and Raven Cretney. "Explaining reflexive governance through discursive institutionalism: estuarine restoration in Aotearoa New Zealand." Journal of Environmental Policy & Planning 23, no. 3 (February 11, 2021): 332–44. http://dx.doi.org/10.1080/1523908x.2021.1885358.

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12

Smith, Quentin H. T., Andrew D. Heap*, and Scott L. Nichol. "Origin and Formation of an Estuarine Barrier Island, Tapora Island, New Zealand." Journal of Coastal Research 262 (March 2010): 292–300. http://dx.doi.org/10.2112/08-1127.1.

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13

Glover, Richard B., and Edward K. Mroczek. "Changes in silica chemistry and hydrology across the Rotorua geothermal field, New Zealand." Geothermics 27, no. 2 (April 1998): 183–96. http://dx.doi.org/10.1016/s0375-6505(97)10014-1.

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14

Higham, T. F. G., and A. G. Hogg. "Evidence for Late Polynesian Colonization of New Zealand: University of Waikato Radiocarbon Measurements." Radiocarbon 39, no. 2 (1997): 149–92. http://dx.doi.org/10.1017/s0033822200051997.

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We present radiocarbon determinations for 271 New Zealand archaeological samples measured at the University of Waikato Radiocarbon Dating Laboratory between 1975 and 1995. A discard protocol is applied to the series and the list culled to winnow the acceptable dates from those that may incorporate error. None of the 221 acceptable 14C determinations older than 600 bp (in the case of terrestrial samples) or 930 bp (in the case of marine and estuarine shell) extends beyond cal ad 1250. This conclusion supports the short chronology model of New Zealand prehistory presented by Anderson (1991).

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15

Fedorova, I., A. Chetverova, D. Bolshiyanov, A. Makarov, J. Boike, B. Heim, A. Morgenstern, et al. "Lena Delta hydrology and geochemistry." Biogeosciences Discussions 10, no. 12 (December 23, 2013): 20179–237. http://dx.doi.org/10.5194/bgd-10-20179-2013.

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Abstract. The Lena River forms one of the largest deltas in the Arctic; studying this delta has raised many questions regarding processes that occur there that remain open today. Comparing long-term hydrometric observational data of Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) from the Khabarova polar station, located at the head of the delta not far from where the Lena River divides into its main branches, with field observations, which have been carried out since 2002 revealed new insights into the hydrological, hydrochemical, and geochemical processes within the delta. Three periods with various water volumes and intensity of fluvial processes were chosen from the long-term record of water and sediment discharge. The role of ice event (ice blockage and ice floating) during high water in reconfiguring branch channels and influencing the volume of sediment runoff was identified. Results were obtained quantifying the increase of water and sediment discharges in the middle part of the delta main branches. This increase is to a great extent connected with an additional influx of water, as well as an increase of suspended and dissolved material released from the ice complex. A range of major ion and biogenic element contents in the delta branches in summer is introduced, and differences specified between the hydrochemical composition of thawing ice complex waters, of small Lena River branches, and of estuarine areas. The conservative character of some dissolved substances was analyzed along the length of the river branches. The contents of carbon and geochemical substances in suspended and bottom sediments are reported.

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16

WOODS, J. L. D. "The Evolution of a Holocene Estuarine Barrier on the Coromandel Coast, New Zealand." Geographical Research 50, no. 1 (July 15, 2011): 89–101. http://dx.doi.org/10.1111/j.1745-5871.2011.00711.x.

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17

Hemmingsen, Maree A. "Radiocarbon age for estuarine shells from Lakelands, Lake Ellesmere (Te Waihora), New Zealand." New Zealand Journal of Marine and Freshwater Research 35, no. 2 (June 2001): 329–34. http://dx.doi.org/10.1080/00288330.2001.9517003.

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18

Wells, Patricia E. "An estuarine fossil assemblage from the Mangaoranga Formation (Upper Miocene), Wairarapa, New Zealand." Journal of the Royal Society of New Zealand 16, no. 4 (December 1986): 307–17. http://dx.doi.org/10.1080/03036758.1986.10416810.

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19

Kelley, Amanda. "Food Web Impacts of the Invasive New Zealand Mudsnail in an Estuarine System." McNair Scholars Online Journal 2, no. 1 (2006): 162–74. http://dx.doi.org/10.15760/mcnair.2006.162.

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20

Bradford, Janet M., Fook Hoe Chang, Ruth Baldwin, Bruce Chapman, Malcolm Downes, and Paul Woods. "Hydrology, plankton, and nutrients in Pelorus Sound, New Zealand, July 1981 and May 1982." New Zealand Journal of Marine and Freshwater Research 21, no. 2 (June 1987): 223–33. http://dx.doi.org/10.1080/00288330.1987.9516218.

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21

Allis, R. G., and J. T. Lumb. "The rotorua geothermal field, New Zealand: its physical setting, hydrology, and response to exploitation." Geothermics 21, no. 1-2 (February 1992): 7–24. http://dx.doi.org/10.1016/0375-6505(92)90065-h.

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22

van Roon, Marjorie Ruth, Tamsin Pamela Rigold, and Jennifer Dixon. "SEA Planning Responses to Estuarine Cumulative Effects of Watershed Urbanisation." Journal of Environmental Assessment Policy and Management 18, no. 03 (September 2016): 1650012. http://dx.doi.org/10.1142/s1464333216500125.

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Strategic Environmental Assessment (SEA) and Cumulative Effects Assessment (CEA) are the focus of this research that investigated the evolving response in plans to the biologically undesirable accumulation of copper and zinc in a New Zealand estuary. Sources of metals are influenced by policies and plan provisions for land use, transport, stormwater management and boat moorings. During four decades of local government reform, plans responded to the scientific evidence of accumulation with increasingly sophisticated stormwater management. Despite the less explicit inclusion of SEA in New Zealand legislation, this research demonstrates for international audiences the concurrence of jurisdictional amalgamation; growing awareness and knowledge sharing across scientific, engineering and planning practitioners; and a steady improvement in plans to enable a marked slowing in cumulative effects (CEs) of urbanisation. A proposed Auckland Unitary Plan (PAUP) attempts to address some cumulative effects within watersheds now no longer divided by jurisdictional boundaries.

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23

Francis, Malcolm P., Mark A. Morrison, John Leathwick, and Cameron Walsh. "Predicting patterns of richness, occurrence and abundance of small fish in New Zealand estuaries." Marine and Freshwater Research 62, no. 11 (2011): 1327. http://dx.doi.org/10.1071/mf11067.

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Estuarine fish habitats are vulnerable to human impacts and are poorly studied. We surveyed 69 of New Zealand’s 443 estuaries across 1500 km to: determine species composition of small fishes; model and predict their richness, occurrence and abundance; test marine classification schemes as a basis for Marine Protected Areas; and inform impact mitigation measures. Boosted regression tree models produced acceptable fits for richness and occurrence at estuary and site scales and abundance at the site scale. Richness was greatest in northern North Island; the best predictors were estuary area and area of intertidal habitat. Within estuaries, richness increased towards the head, as water clarity declined and the substratum became muddier. Air temperature, estuary and intertidal area, tidal range and freshwater and seawater influx were the best predictors of occurrence at the estuary scale; water temperature and salinity were important at the site scale. Biological classification schemes seldom improved model fits and have little predictive utility. Richness predictions were made for 380 estuaries and occurrence predictions for 16 species. These predictions inform resource managers about estuarine fishes within their jurisdiction, bypassing the need to undertake expensive field surveys. However, sampling of environmental predictors is still required to drive some models.

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24

Lill, Adrian W. T., Aparna Lal, and Gerard P. Closs. "Life history and reproduction of two abundant mysids (Mysidacea: Mysidae) in an intermittently open New Zealand estuary." Marine and Freshwater Research 61, no. 6 (2010): 633. http://dx.doi.org/10.1071/mf09085.

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Mysids typically form a large proportion of the hyperbenthic faunal biomass in estuaries and are central to the functioning of estuarine food webs. The population dynamics, annual life histories and reproductive effort of two common temperate estuarine mysids, Tenagomysis chiltoni and T. novae-zealandiae, are described in the intermittently open Kaikorai Lagoon, New Zealand. Mysids were sampled by night, monthly from September 2003 to September 2004. Both species completed their life cycles in the lagoon. There was an apparent spatial separation of breeding populations, with T. chiltoni prevalent in the upper lagoon and T. novae-zealandiae dominating the lower lagoon. Densities were lowest in late winter and peaked in late summer/early autumn for both species. Both species exhibited multivoltine life cycles, with breeding peaks occurring in October 2003, December 2003 and February/March 2004 for T. novae-zealandiae, and October/November 2003 and February/March 2004 for T. chiltoni. Breeding strategy for both species varied over the year with the adult size, brood size and the reproductive effort of both T. novae-zealandiae and T. chiltoni all being highest in spring. The life histories of both T. novae-zealandiae and T. chiltoni in the Kaikorai Lagoon are comparable to life histories described for other temperate estuarine mysid species in large open estuaries, and were not significantly modified to cope with the unpredictable demands of life in an intermittent estuary.

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25

Hogg, A. G., T. F. G. Higham, and J. Dahm. "14C Dating of Modern Marine and Estuarine Shellfish." Radiocarbon 40, no. 2 (1997): 975–84. http://dx.doi.org/10.1017/s0033822200018944.

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We measured the 14C content of 36 living marine molluscs from Tairua Harbour and the rocky coast on the Coromandel Peninsula of New Zealand. We identified species suitable for radiocarbon dating and show that the open marine intertidal zone is enriched in 14C compared to the open marine subtidal zone or estuary. We also found a uniform 14C distribution in the Tairua Harbour, by analyzing samples of the estuarine bivalve Austrovenus stutchbwyi collected up to 5 km from the harbor entrance.

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26

Stevens, CL, and MJ Smith. "Turbulent mixing in a stratified estuarine tidal channel: Hikapu Reach, Pelorus Sound, New Zealand." New Zealand Journal of Marine and Freshwater Research 50, no. 4 (May 17, 2016): 485–505. http://dx.doi.org/10.1080/00288330.2016.1171243.

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27

Lindqvist, JK, HJL Gard, and DE Lee. "Geological setting, sedimentology and biota of the estuarine late Oligocene Pomahaka Formation, New Zealand." New Zealand Journal of Geology and Geophysics 59, no. 2 (April 2, 2016): 352–65. http://dx.doi.org/10.1080/00288306.2016.1150862.

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28

Santos, Isaac R., Karin R. Bryan, Conrad A. Pilditch, and Douglas R. Tait. "Influence of porewater exchange on nutrient dynamics in two New Zealand estuarine intertidal flats." Marine Chemistry 167 (December 2014): 57–70. http://dx.doi.org/10.1016/j.marchem.2014.04.006.

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29

Chagué-Goff, C., S. L. Nichol, A. V. Jenkinson, and H. Heijnis. "Signatures of natural catastrophic events and anthropogenic impact in an estuarine environment, New Zealand." Marine Geology 167, no. 3-4 (July 2000): 285–301. http://dx.doi.org/10.1016/s0025-3227(00)00035-9.

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30

Stewart, Michael, Greg Olsen, Christopher W. Hickey, Bianca Ferreira, Aleksandra Jelić, Mira Petrović, and Damia Barcelo. "A survey of emerging contaminants in the estuarine receiving environment around Auckland, New Zealand." Science of The Total Environment 468-469 (January 2014): 202–10. http://dx.doi.org/10.1016/j.scitotenv.2013.08.039.

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31

Mitchell, Steven B., Malcolm O. Green, Iain T. MacDonald, and Mark Pritchard. "Field studies of estuarine turbidity under different freshwater flow conditions, Kaipara River, New Zealand." Estuarine, Coastal and Shelf Science 198 (November 2017): 542–54. http://dx.doi.org/10.1016/j.ecss.2016.06.009.

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32

Cox, Malcolm E., and Patrick Browne. "Hydrothermal alteration mineralogy as an indicator of hydrology at the Ngawha geothermal field, New Zealand." Geothermics 27, no. 3 (June 1998): 259–70. http://dx.doi.org/10.1016/s0375-6505(97)10015-3.

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33

Voyde, Emily, Elizabeth Fassman, and Robyn Simcock. "Hydrology of an extensive living roof under sub-tropical climate conditions in Auckland, New Zealand." Journal of Hydrology 394, no. 3-4 (November 2010): 384–95. http://dx.doi.org/10.1016/j.jhydrol.2010.09.013.

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34

Anderson, Harris J., Christopher M. Moy, Marcus J. Vandergoes, Jonathan E. Nichols, Christina R. Riesselman, and Robert Van Hale. "Southern Hemisphere westerly wind influence on southern New Zealand hydrology during the Lateglacial and Holocene." Journal of Quaternary Science 33, no. 6 (July 25, 2018): 689–701. http://dx.doi.org/10.1002/jqs.3045.

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35

Weingartner, Rolf, and Charles Pearson. "A Comparison of the Hydrology of the Swiss Alps and the Southern Alps of New Zealand." Mountain Research and Development 21, no. 4 (November 2001): 370–81. http://dx.doi.org/10.1659/0276-4741(2001)021[0370:acotho]2.0.co;2.

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36

Haria, A. H., S. P. McGrath, J. P. Moore, J. P. Bell, and R. P. Blackshaw. "Impact of the New Zealand flatworm (Artioposthia triangulata) on soil structure and hydrology in the UK." Science of The Total Environment 215, no. 3 (May 1998): 259–65. http://dx.doi.org/10.1016/s0048-9697(98)00126-0.

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37

Taylor, Nigel J., and F. J. Taylor. "Hydrology and Changes in the Nutrients and Phytoplankton Levels in Goat Island Bay, Northern New Zealand." Internationale Revue der gesamten Hydrobiologie und Hydrographie 70, no. 2 (1985): 173–86. http://dx.doi.org/10.1002/iroh.19850700202.

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38

CONWAY, KEVIN W., ANDREW L. STEWART, and CRAGEN KING. "A new species of the clingfish genus Trachelochismus from bay and estuarine areas of New Zealand (Teleostei: Gobiesocidae)." Zootaxa 4319, no. 3 (September 13, 2017): 531. http://dx.doi.org/10.11646/zootaxa.4319.3.6.

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Trachelochismus aestuarium, new species, is described on the basis of 120 specimens, 10.1–45.5 mm SL, collected from shallow (0–29 meters depth) bay and estuarine areas along the coast of New Zealand. It is distinguished from congeners (T. melobesia and T. pinnulatus) by a combination of characters, including features of the cephalic sensory system, adhesive disc papillae, and colouration in life, head shape, and gill-raker, fin ray and vertebrae counts. Phylogenetic analyses of mitochondrial loci (cytrochrome c oxidase subunit 1 and 12S ribosomal RNA) and one nuclear locus (zic family member 1) for all three species of Trachelochismus and two outgroup taxa resulted in phylogenetic hypotheses in which T. aestuarium is the sister taxon to either T. pinnulatus (mitochondrial loci) or T. pinnulatus + T. melobesia (ZIC1). A new terminology is introduced for the superficial neuromasts arranged in rows on the surface of the head in members of Trachelochismus.

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39

Fitzharris, Blair, Wendy Lawson, and Ian Owens. "Research on glaciers and snow in New Zealand." Progress in Physical Geography: Earth and Environment 23, no. 4 (December 1999): 469–500. http://dx.doi.org/10.1177/030913339902300402.

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The glaciers and snowfields of the Southern Alps of New Zealand are the most significant in the Southern Hemisphere outside Antarctica and South America. The most substantial data on Southern Hemisphere glacier fluctuations come from New Zealand. The nature and behaviour of New Zealand's glaciers are also of wider scientific interest, because they are highly sensitive, high input-output systems that represent the temperate, maritime end of the glacier process-behaviour continuum. The areal extent and volume of glaciers and snow are outlined and an assessment is made of their scientific relevance and of their importance as resources and hazards. The main themes and progress of research on glaciers and snow, including snow avalanches, are reviewed. Glacier research has concentrated on only a few key glaciers and has focused on understanding glacier change. Main topics covered in this review relate to this focus and include fluctuations in termini, other mass balance signals and response to climate variability. Research on mass balance processes, glacier dynamics and glacier hydrology is also outlined. Seasonal snow has received less attention until recently. The main emphasis has been on quantification and past variability and its contribution to river flow, particularly in the most important hydroelectric power catchments of the South Island. Some field measurements have been made of the energy balance over snow. Research on snow avalanches has grown as the demands of winter recreation and alpine tourism have increased the hazard. Research first concentrated on production of avalanche atlases for the most hazardous areas and on quantifying the nature of the hazard. Subsequently, there has been a shift towards more process studies that are related to avalanche formation and runout distance. The main gaps in research on glaciers and snow are identified and key areas for future work proposed. There is an urgent need, in particular, for glacier mass-balance measurements. Extensive data on snow structure need to be synthesized. Satellite imagery should be used for monitoring of seasonal snow. Snow melt during northwest storms needs to be better defined. A more developed engineering approach is required for the study of snow avalanches. New Zealand offers exciting possibilities for the study of cryospheric processes, including response to future climate change.

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40

Hampton, W. A., G. P. White, P. W. O. Hoskin, P. R. L. Browne, and K. A. Rodgers. "Cinnabar, livingstonite, stibnite and pyrite in Pliocene silica sinter from Northland, New Zealand." Mineralogical Magazine 68, no. 1 (February 2004): 191–98. http://dx.doi.org/10.1180/0026461046810180.

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AbstractSilica sinter masses in the southern portion of the Pliocene Puhipuhi geothermal field of Northland, New Zealand, have recrystallized to microcrystalline quartz and moganite but many primary depositional fabrics of the sinters can still be recognized. Finely disseminated cinnabar, acicular stibnite, pyrite framboids and minor livingstonite are distributed through both massive sinter and stromatolitic fabrics with sulphide mineralization extending from fractured rocks about former spring vents into less disturbed sinter layers. The deposition of sulphides in the sinters is part of a continuum of mineralization resulting from the former hydrothermal regime and which extends to depth in the extinct geothermal system. Periodic changes in the hydrology, such as repeated fracturing following fracture sealing facilitated episodic sulphide deposition. Mercury is considered to have travelled in the liquid phase with antimony and precipitated directly as cinnabar. Remobilization of the sulphides, along with the recrystallization of the sinter masses, have produced complex textural relations. The multifaceted paragenesis of the sulphides is reflected in the range of their minor and trace element compositions revealed by electron microprobe analyses.

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41

Qin, K., L. X. Wu, A. De Santis, J. Meng, W. Y. Ma, and G. Cianchini. "Quasi-synchronous multi-parameter anomalies associated with the 2010–2011 New Zealand earthquake sequence." Natural Hazards and Earth System Sciences 12, no. 4 (April 16, 2012): 1059–72. http://dx.doi.org/10.5194/nhess-12-1059-2012.

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Abstract. Positive thermal anomalies about one month before the 3 September 2010 Mw = 7.1 New Zealand earthquake and "coincidental" quasi-synchronous fluctuations of GPS displacement were reported. Whether there were similar phenomena associated with the aftershocks? To answer it, the following was investigated: multiple parameters including surface and near-surface air temperature, surface latent heat flux, GPS displacement and soil moisture, using a long-term statistical analysis method. We found that local thermal and deformation anomalies appeared quasi-synchronously in three particular tectonic zones, not only about one month before the mainshock, but also tens of days before the 21 February 2011 Mw = 6.3 aftershock, and that the time series of soil moisture on the epicenter pixel had obvious peaks on most of the anomalous days. Based on local tectonic geology, hydrology and meteorology, the particular lithosphere-coversphere-atmosphere coupling mode is interpreted and four mechanisms (magmatic-hydrothermal fluids upwelling, soil moisture increasing, underground pore gases leaking, and positive holes activating and recombining) are discussed.

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42

Bell, Robert G. "Behaviour of dissolved silica, and estuarine/coastal mixing and exchange processes at Tairua Harbour, New Zealand." New Zealand Journal of Marine and Freshwater Research 28, no. 1 (March 1994): 55–68. http://dx.doi.org/10.1080/00288330.1994.9516596.

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43

Swales, Andrew, and Catherine E. Lovelock. "Comparison of sediment-plate methods to measure accretion rates in an estuarine mangrove forest (New Zealand)." Estuarine, Coastal and Shelf Science 236 (May 2020): 106642. http://dx.doi.org/10.1016/j.ecss.2020.106642.

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44

Le Coz, Jérôme, Antoine Patalano, Daniel Collins, Nicolás Federico Guillén, Carlos Marcelo García, Graeme M. Smart, Jochen Bind, et al. "Crowdsourced data for flood hydrology: Feedback from recent citizen science projects in Argentina, France and New Zealand." Journal of Hydrology 541 (October 2016): 766–77. http://dx.doi.org/10.1016/j.jhydrol.2016.07.036.

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45

Etherington, Thomas R., George L. W. Perry, and Janet M. Wilmshurst. "HOTRUNZ: an open-access 1 km resolution monthly 1910–2019 time series of interpolated temperature and rainfall grids with associated uncertainty for New Zealand." Earth System Science Data 14, no. 6 (June 21, 2022): 2817–32. http://dx.doi.org/10.5194/essd-14-2817-2022.

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Abstract. Long time series of temperature and rainfall grids are fundamental to understanding how these environmental variables affect environmental or ecological patterns and processes such as plant distributions, plant and animal phenology, wildfires, and hydrology. Ideally such temperature and rainfall grids are openly available and associated with uncertainties so that data-quality issues are transparent to users. We present a History of Open Temperature and Rainfall with Uncertainty in New Zealand (HOTRUNZ) that uses climatological aided natural neighbour interpolation to provide monthly 1 km resolution grids of total rainfall, mean air temperature, mean daily maximum air temperature, and mean daily minimum air temperature across New Zealand from 1910 to 2019. HOTRUNZ matches the best available temporal extent and spatial resolution of any open-access temperature and rainfall grids that include New Zealand and is unique in providing associated spatial uncertainty in the variables' units. The HOTRUNZ grids capture the dynamic spatial and temporal nature of monthly temperature and rainfall and the uncertainties associated with the interpolation. We also demonstrate how to quantify and visualise temporal trends across New Zealand that recognise the temporal and spatial variation in uncertainties in the HOTRUNZ data. The HOTRUNZ data are openly available at https://doi.org/10.7931/zmvz-xf30 (Etherington et al., 2021).

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Stewart, M. K. "Promising new baseflow separation and recession analysis methods applied to streamflow at Glendhu Catchment, New Zealand." Hydrology and Earth System Sciences 19, no. 6 (June 2, 2015): 2587–603. http://dx.doi.org/10.5194/hess-19-2587-2015.

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Abstract. Understanding and modelling the relationship between rainfall and runoff has been a driving force in hydrology for many years. Baseflow separation and recession analysis have been two of the main tools for understanding runoff generation in catchments, but there are many different methods for each. The new baseflow separation method presented here (the bump and rise method or BRM) aims to accurately simulate the shape of tracer-determined baseflow or pre-event water. Application of the method by calibrating its parameters, using (a) tracer data or (b) an optimising method, is demonstrated for the Glendhu Catchment, New Zealand. The calibrated BRM algorithm is then applied to the Glendhu streamflow record. The new recession approach advances the thesis that recession analysis of streamflow alone gives misleading information on catchment storage reservoirs because streamflow is a varying mixture of components of very different origins and characteristics (at the simplest level, quickflow and baseflow as identified by the BRM method). Recession analyses of quickflow, baseflow and streamflow show that the steep power-law slopes often observed for streamflow at intermediate flows are artefacts due to mixing and are not representative of catchment reservoirs. Applying baseflow separation before recession analysis could therefore shed new light on water storage reservoirs in catchments and possibly resolve some current problems with recession analysis. Among other things it shows that both quickflow and baseflow reservoirs in the studied catchment have (non-linear) quadratic characteristics.

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Coleman, M. A., J. S. Clark, M. A. Doblin, M. J. Bishop, and B. P. Kelaher. "Genetic differentiation between estuarine and open coast ecotypes of a dominant ecosystem engineer." Marine and Freshwater Research 70, no. 7 (2019): 977. http://dx.doi.org/10.1071/mf17392.

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Temperate intertidal shores globally are often dominated by habitat-forming seaweeds, but our knowledge of these systems is heavily biased towards northern hemisphere species. Rocky intertidal shores throughout Australia and New Zealand are dominated by a single monotypic species, Hormosira banksii. This species plays a key role in facilitating biodiversity on both rocky shores and estuarine habitats, yet we know little about the processes that structure populations. Herein we characterise the genetic diversity and structure of Hormosira and demonstrate strong restrictions to gene flow over small spatial scales, as well as between estuarine and open coast populations. Estuarine ecotypes were often genetically unique from nearby open coast populations, possibly due to extant reduced gene flow between habitats, founder effects and coastal geomorphology. Deviations from random mating in many locations suggest complex demographic processes are at play within shores, including clonality in estuarine populations. Strong isolation by distance in Hormosira suggests that spatial management of intertidal habitats will necessitate a network of broad-scale protection. Understanding patterns of genetic diversity and gene flow in this important ecosystem engineer will enhance the ability to manage, conserve and restore this key species into the future.

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Taddese, Fasil, Marc Schallenberg, Pavel Mikheev, Matt G. Jarvis, and Gerard P. Closs. "Ichthyofaunal assemblages in shallow littoral habitats of permanently open estuaries and intermittently closed and open lakes or lagoons in Otago, New Zealand." Marine and Freshwater Research 69, no. 8 (2018): 1222. http://dx.doi.org/10.1071/mf17334.

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Fish assemblages of New Zealand estuaries are poorly studied, and knowledge of the effects of estuary–ocean connections on the ichthyofaunal composition of estuaries remains limited. Understanding the status of fish composition of estuaries is crucial for planning for sustainable management of aquatic ecosystems. In the present study we sampled fish using a seine net from lower reaches of six permanently open estuaries and six intermittently closed and open lakes or lagoons (ICOLLs) along the Otago coastline during winter 2016 and summer 2017. Marked differences in ichthyofaunal composition were observed in the shallow littoral habitats of permanently open estuaries and ICOLLs. Fish assemblages reflected estuary–ocean connection status of estuaries during both seasons. ICOLLs showed greater fish abundance than permanently open systems. Fish abundance was higher in summer than in winter in both estuary types. Fish species with marine–estuarine opportunist and estuarine–migrant life histories dominated permanently open estuaries. Conversely, species with a diadromous life history but known to form landlocked populations were abundant in ICOLLs. Salinity and temperature were correlated with fish abundance in both estuary types.

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Fedorova, I., A. Chetverova, D. Bolshiyanov, A. Makarov, J. Boike, B. Heim, A. Morgenstern, et al. "Lena Delta hydrology and geochemistry: long-term hydrological data and recent field observations." Biogeosciences 12, no. 2 (January 19, 2015): 345–63. http://dx.doi.org/10.5194/bg-12-345-2015.

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Abstract. The Lena River forms one of the largest deltas in the Arctic. We compare two sets of data to reveal new insights into the hydrological, hydrochemical, and geochemical processes within the delta: (i) long-term hydrometric observations at the Khabarova station at the head of the delta from 1951 to 2005; (ii) field hydrological and geochemical observations carried out within the delta since 2002. Periods with differing relative discharge and intensity of fluvial processes were identified from the long-term record of water and sediment discharge. Ice events during spring melt (high water) reconfigured branch channels and probably influenced sediment transport within the delta. Based on summer field measurements during 2005–2012 of discharge and sediment fluxes along main delta channels, both are increased between the apex and the front of the delta. This increase is to a great extent connected with an additional influx of water from tributaries, as well as an increase of suspended and dissolved material released from the ice complex. Summer concentrations of major ion and biogenic substances along the delta branches are partly explained by water sources within the delta, such as thawing ice complex waters, small Lena River branches and estuarine areas.

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Deng, Y., J. Ogden, M. Horrocks, and S. Anderson. "Application of palynology to describe vegetation succession in estuarine wetlands on Great Barrier Island, northern New Zealand." Journal of Vegetation Science 17, no. 6 (February 24, 2006): 765–82. http://dx.doi.org/10.1111/j.1654-1103.2006.tb02500.x.

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