title: Agricultural intensification: Whither indigenous biodiversity?

authors: Lee, William G.

subjects: agricultural sustainability

abstract: A new wave of agricultural intensification in New Zealand is causing increasing pressure on natural resources. Moller et al. (2008) suggest that the agricultural intensification is inevitable, that negative environmental impacts have only been demonstrated for aquatic systems, and that a new paradigm based on integrating indigenous biodiversity and agriculture offers the best way forward. We question all these assertions. Recent agricultural intensification is increasingly driven by international economic opportunities for agricorporates to maximise returns. Intensification over the last two decades is causing loss of habitat for indigenous species and homogenisation of landscapes at scales unprecedented since deforestation by colonial farmers. Regional and district councils appear ill prepared for a formative role requiring sustainable land and resource use, while current patterns of local consumption and offshore resource subsidisation for agribusinesses are probably unsustainable. Irrespective of the drivers of agricultural intensification, residual indigenous biodiversity in agricultural landscapes in New Zealand is on an extinction pathway. The challenge for agro-industry is to demonstrate that it can, in the absence of regulation, use natural resources and at the same time facilitate persistence of indigenous biodiversity components at scales that contribute to national biodiversity goals.

text: Agricultural intensification: Whither indigenous biodiversity? A new wave of agricultural intensification in New Zealand is causing increasing pressure on natural resources. Moller et al. (2008) suggest that the agricultural intensification is inevitable, that negative environmental impacts have only been demonstrated for aquatic systems, and that a new paradigm based on integrating indigenous biodiversity and agriculture offers the best way forward. We question all these assertions. Recent agricultural intensification is increasingly driven by international economic opportunities for agricorporates to maximise returns. Intensification over the last two decades is causing loss of habitat for indigenous species and homogenisation of landscapes at scales unprecedented since deforestation by colonial farmers. Regional and district councils appear ill prepared for a formative role requiring sustainable land and resource use, while current patterns of local consumption and offshore resource subsidisation for agribusinesses are probably unsustainable. Irrespective of the drivers of agricultural intensification, residual indigenous biodiversity in agricultural landscapes in New Zealand is on an extinction pathway. The challenge for agro-industry is to demonstrate that it can, in the absence of regulation, use natural resources and at the same time facilitate persistence of indigenous biodiversity components at scales that contribute to national biodiversity goals.

year: 2008

title: Coronal heating distribution due to low-frequency, wave-driven turbulence

authors: Dmitruk, Pablo

subjects: MHD

abstract: The heating of the lower solar corona is examined using numerical simulations and theoretical models of magnetohydrodynamic turbulence in open magnetic regions. A turbulent energy cascade to small length scales perpendicular to the mean magnetic field can be sustained by driving with low-frequency Alfvén waves reflected from mean density and magnetic field gradients. This mechanism deposits energy efficiently in the lower corona, and we show that the spatial distribution of the heating is determined by the mean density through the Alfvén speed profile. This provides a robust heating mechanism which can explain observed high coronal temperatures and accounts for the significant heating (per unit volume) distribution below 2 solar radii needed in models of the origin of the solar wind. The obtained heating per unit mass, on the other hand, is much more extended, indicating that the heating on a per-particle basis persists throughout all the lower coronal region considered here.

text: Coronal heating distribution due to low-frequency, wave-driven turbulence The heating of the lower solar corona is examined using numerical simulations and theoretical models of magnetohydrodynamic turbulence in open magnetic regions. A turbulent energy cascade to small length scales perpendicular to the mean magnetic field can be sustained by driving with low-frequency Alfvén waves reflected from mean density and magnetic field gradients. This mechanism deposits energy efficiently in the lower corona, and we show that the spatial distribution of the heating is determined by the mean density through the Alfvén speed profile. This provides a robust heating mechanism which can explain observed high coronal temperatures and accounts for the significant heating (per unit volume) distribution below 2 solar radii needed in models of the origin of the solar wind. The obtained heating per unit mass, on the other hand, is much more extended, indicating that the heating on a per-particle basis persists throughout all the lower coronal region considered here.

year: 2002

title: Here to stay: Reshaping the regions through mana Māori

authors: Simmonds, Naomi Beth

abstract: Situated 65 kilometres south-east of Hamilton, Putāruru (population 3747 in the 2013 Census) is typical of the many farming service towns scattered across rural Aotearoa New Zealand. Bakeries, op shops, a sports bar and a farm equipment supplier occupy the main street. Unlike nearby Tirau, which transformed from a one-stop shop into a vibrant boutique village in the late 1990s, Putāruru township remains largely indistinguishable from other rural centres. There are few clues to the substantial farming-based and water-generated wealth that lies beyond the town.

text: Here to stay: Reshaping the regions through mana Māori Situated 65 kilometres south-east of Hamilton, Putāruru (population 3747 in the 2013 Census) is typical of the many farming service towns scattered across rural Aotearoa New Zealand. Bakeries, op shops, a sports bar and a farm equipment supplier occupy the main street. Unlike nearby Tirau, which transformed from a one-stop shop into a vibrant boutique village in the late 1990s, Putāruru township remains largely indistinguishable from other rural centres. There are few clues to the substantial farming-based and water-generated wealth that lies beyond the town.

year: 2016