Browsing by Supervisor "Hamilton, David P."
Now showing items 21-34 of 34
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Novel approaches for modelling changes in phytoplankton diversity and lake ecosystem function
(The University of Waikato, 2019)Ecosystem function represents the collective outcome of many different processes. Function may be interrupted by events that originate from outside a system, influencing biological diversity dynamics. Difficulties in ... -
Phytoplankton dynamics in North Island lakes, New Zealand
(The University of Waikato, 2006)The dynamics of phytoplankton were investigated in 40 lakes of the North Island, New Zealand. A range of environmental variables was examined on different temporal and spatial scales in relation to the surface and DCM ( ... -
Redox cycling of colloidal macro- and micro-nutrients in a monomictic lake
(The University of Waikato, 2022)Lakes are more than just water bodies as they play an essential role in the cycling of nutrients and carbon, with impacts at the local and global scale. This study selected Lake Ngapouri, a small monomictic lake in the ... -
Remote sensing, numerical modelling and ground truthing for analysis of lake water quality and temperature
(University of Waikato, 2014)Freshwater accounts for just 2.5% of the earth’s water resources, and its quality and availability are becoming an issue of global concern in the 21st century. Growing human population, over-exploitation of water sources ... -
Restoring freshwater quality: an integrated environmental, economic and ecosystem services assessment of reducing nutrient loads to Lake Rotorua
(University of Waikato, 2017)The management of freshwater resources is a global concern as anthropogenic pressures on these resources have intensified. A decline in the quantity and quality of freshwater urgently requires concerted restoration actions ... -
The Role of Viral Systems in Nutrient Cycling
(University of Waikato, 2011)The Te Arawa/Rotorua lakes located in the central North Island of New Zealand have significant cultural, historic, social and economic value. Anthropogenic changes in land use have led to a decline in water quality in some ... -
Seasonal and spatial patterns in nitrogen cycling and food web interactions in Lake Taupō New Zealand
(The University of Waikato, 2018)Lakes with high water quality and low productivity, commonly referred to as ‘oligotrophic’, are often viewed as relatively pristine and highly aesthetic ecosystems, but may still require management of nutrient inputs and ... -
Sediment-Pore Water Chemistry of Taupo Volcanic Zone Lakes and the Effect Trophic State has on Exchange with the Water Column
(University of Waikato, 2012)The Taupo Volcanic Zone (TVZ) is in the Waikato and the Bay of Plenty regions of North Island of New Zealand and contains many volcanic lakes of diverse history, physiography, and limnology. The lakes vary in size (0.2 to ... -
Spatial and temporal trends of phytoplankton and physiochemical variables in a hypertrophic, monomictic lake
(University of Waikato, 2011)Spatial and temporal variations in the physical, chemical and biological composition of Lake Ōkaro were measured over 16 months. Lake Ōkaro is a small (0.32 km2) hypertrophic, monomictic lake located in the Central Volcanic ... -
Spectroscopic Investigations of Oligopeptides from Aquatic Cyanobacteria: Characterisation of New Oligopeptides, Development of Microcystin Quantification Tools and Investigations into Microcystin Production
(University of Waikato, 2013)Cyanobacteria (blue-green algae) are a group of ancient prokaryotic organisms which have become synonymous with water quality deterioration. An array of compounds is produced by aquatic cyanobacteria, the largest group ... -
Temporal variability in the water quality of a deep temperate oligotrophic lake
(University of Waikato, 2016)Lakes change over time in response to climate and catchment disturbance, even in the absence of anthropogenic stressors. This temporal change may impact the setting of reference conditions for lakes. Many sources of ... -
The ecology of community environmental groups: Integrating restoration, partnerships and citizen science
(University of Waikato, 2016)New Zealand is facing a biodiversity crisis as forest and wetland habitat loss continue, and the quality of freshwater declines. But in recent years, a grassroots, nationwide network of community environmental groups has ... -
The performance of Detainment Bunds (DBs) for attenuating phosphorus and sediment loss from pastoral farmland
(University of Waikato, 2013)New Zealand relies upon phosphorus (P) to sustain agricultural productivity. However, P loss from farming systems to freshwater ecosystems can promote eutrophication; a global problem. A disproportionate amount of P and ... -
Variability in nutrient loading to lake ecosystems and associated impacts on water quality
(University of Waikato, 2013)Globally, the accelerated eutrophication of lake ecosystems due to excess inputs of nitrogen (N) and phosphorus (P) is a significant problem. The rate of loading of N and P to lakes varies both in space and time; consequently, ...
