title: Modelling the effects of Po River discharge, internal nutrient cycling and hydrodynamics on biogeochemistry of the Northern Adriatic Sea

authors: Spillman, C.M.

subjects: ELCOM–CAEDYM

abstract: This study investigates the coupling of physical and biological processes in the Northern Adriatic Sea through use of a dynamic mass balance approach derived from an interdisciplinary model of hydrodynamics and water quality. Emphasis is placed on modelling the role of nutrient inputs from the Po River and the response of phytoplankton concentrations and distributions, and basin-wide nutrient fluxes. The effects of riverine inflows, seasonal stratification and meteorological forcing were assessed with a dynamically coupled 3D hydrodynamic (ELCOM) and ecological (CAEDYM) model after validation with in situ field and remote sensing data. Model simulation results and mass balance calculations indicate a close coupling of physical and biological processes over a range of space and time scales. Comparison of fluxes from advection and particulate organic matter sedimentation indicate that nutrient and phytoplankton levels of the Northern Adriatic Sea are sensitive to variations in riverine nutrient loadings. A net total phosphorus accumulation of 4.61 × 10 kg⁶ was determined for the basin in 2002, with different climate scenarios and riverine nutrient loadings resulting in varied system responses reflected in this net TP accumulation. Changes in net accumulation of nutrients are considerably lower than variations in nutrient loadings, which suggests that the Northern Adriatic has substantial buffering capacity.

text: Modelling the effects of Po River discharge, internal nutrient cycling and hydrodynamics on biogeochemistry of the Northern Adriatic Sea This study investigates the coupling of physical and biological processes in the Northern Adriatic Sea through use of a dynamic mass balance approach derived from an interdisciplinary model of hydrodynamics and water quality. Emphasis is placed on modelling the role of nutrient inputs from the Po River and the response of phytoplankton concentrations and distributions, and basin-wide nutrient fluxes. The effects of riverine inflows, seasonal stratification and meteorological forcing were assessed with a dynamically coupled 3D hydrodynamic (ELCOM) and ecological (CAEDYM) model after validation with in situ field and remote sensing data. Model simulation results and mass balance calculations indicate a close coupling of physical and biological processes over a range of space and time scales. Comparison of fluxes from advection and particulate organic matter sedimentation indicate that nutrient and phytoplankton levels of the Northern Adriatic Sea are sensitive to variations in riverine nutrient loadings. A net total phosphorus accumulation of 4.61 × 10 kg⁶ was determined for the basin in 2002, with different climate scenarios and riverine nutrient loadings resulting in varied system responses reflected in this net TP accumulation. Changes in net accumulation of nutrients are considerably lower than variations in nutrient loadings, which suggests that the Northern Adriatic has substantial buffering capacity.

year: 2007

title: Draft genome sequence of uncultured upland soil cluster gammaproteobacteria gives molecular insights into high-affinity methanotrophy

authors: Edwards, Collin R.

abstract: Aerated soils form the second largest sink for atmospheric CH₄. A nearcomplete genome of uncultured upland soil cluster Gammaproteobacteria that oxidize CH₄ at 2.5 ppmv was obtained from incubated Antarctic mineral cryosols. This first genome of high-affinity methanotrophs can help resolve the mysteries about their phylogenetic affiliation and metabolic potential.

text: Draft genome sequence of uncultured upland soil cluster gammaproteobacteria gives molecular insights into high-affinity methanotrophy Aerated soils form the second largest sink for atmospheric CH₄. A nearcomplete genome of uncultured upland soil cluster Gammaproteobacteria that oxidize CH₄ at 2.5 ppmv was obtained from incubated Antarctic mineral cryosols. This first genome of high-affinity methanotrophs can help resolve the mysteries about their phylogenetic affiliation and metabolic potential.

year: 2017

title: Reha Aperahama: a Ngati Rahiri rangatira

authors: Hart, Philip

abstract: Reha Aperahama had an illustrious whakapapa and was affiliated to several hapu. His father was notable as one of the most loyal rangatira (from the Crown’s perspective) in Hauraki, and Reha followed his lead, probably in part because of the financial rewards he received from selling land to settlers. He tried to maximize his income from this source, spending several years pleading for permission to sell his Te Kawana block (near Te Aroha). After opposing Ngati Haua ambitions to acquire the Aroha block, by 1878 he was willing to encourage road building. 
Reha was regularly before the courts because of his inability or reluctance to pay his debts, occasionally perjuring himself to avoid liability. In his later years he had little money. Despite occasionally being drunk and even violent, he was an important figure in Maori society, with a leadership role in his hapu and in the Mormon church. He was also notable for his marital complications.

text: Reha Aperahama: a Ngati Rahiri rangatira Reha Aperahama had an illustrious whakapapa and was affiliated to several hapu. His father was notable as one of the most loyal rangatira (from the Crown’s perspective) in Hauraki, and Reha followed his lead, probably in part because of the financial rewards he received from selling land to settlers. He tried to maximize his income from this source, spending several years pleading for permission to sell his Te Kawana block (near Te Aroha). After opposing Ngati Haua ambitions to acquire the Aroha block, by 1878 he was willing to encourage road building. 
Reha was regularly before the courts because of his inability or reluctance to pay his debts, occasionally perjuring himself to avoid liability. In his later years he had little money. Despite occasionally being drunk and even violent, he was an important figure in Maori society, with a leadership role in his hapu and in the Mormon church. He was also notable for his marital complications.

year: 2016