title: Gains and losses in C and N stocks of New Zealand pasture soils depend on land use

authors: Schipper, Louis A.

subjects: soil carbon

abstract: Previous re-sampling of 31 New Zealand pasture soil profiles to 1 m depth found large and significant losses of C and N over 2–3 decades. These profiles were predominantly on intensively grazed flat land. We have extended re-sampling to 83 profiles, to investigate whether changes in soil C and N stocks were related to land use. Over an average of 27 years, soils (0–30 cm) in flat dairy pastures lost 0.73 ± 0.16 Mg C ha⁻¹ y⁻¹ and 57 ± 16 kg N ha⁻¹ y⁻¹ but we observed no significant change in soil C or N in flat pasture grazed by “dry stock” (e.g., sheep, beef), or in grazed tussock grasslands. Grazed hill country soils (0–30 cm) gained 0.52 ± 0.18 Mg C ha⁻¹ y⁻¹and 66 ± 18 kg N ha⁻¹y⁻¹. The losses of C and N were strongly correlated, and C:N declined significantly. Further, results reported to 60 and 90 cm show that the pattern of losses and gains extend beyond the IPCC accounting depth of 30 cm. Specific causes for the soil C and N changes are unknown, but appear to be related to land use. In general, the losses under dairying correspond to systems with greater stocking rates, fertiliser inputs and removal of C and N in exported products. Gains in hill country pastures may be due to long-term recovery from erosion and disturbance following land clearance. The unexpected and contrary changes of C and N in different pasture systems (initially thought to be at steady state) demonstrates the need for global and national-scale collection of robust data investigating soil biogeochemical changes, not only for grasslands but also for other land uses. Re-sampling of soils can constrain the directions and magnitude of soil C and N change associated with land use and management to underpin C and N inventories and correctly identify mitigation options.

text: Gains and losses in C and N stocks of New Zealand pasture soils depend on land use Previous re-sampling of 31 New Zealand pasture soil profiles to 1 m depth found large and significant losses of C and N over 2–3 decades. These profiles were predominantly on intensively grazed flat land. We have extended re-sampling to 83 profiles, to investigate whether changes in soil C and N stocks were related to land use. Over an average of 27 years, soils (0–30 cm) in flat dairy pastures lost 0.73 ± 0.16 Mg C ha⁻¹ y⁻¹ and 57 ± 16 kg N ha⁻¹ y⁻¹ but we observed no significant change in soil C or N in flat pasture grazed by “dry stock” (e.g., sheep, beef), or in grazed tussock grasslands. Grazed hill country soils (0–30 cm) gained 0.52 ± 0.18 Mg C ha⁻¹ y⁻¹and 66 ± 18 kg N ha⁻¹y⁻¹. The losses of C and N were strongly correlated, and C:N declined significantly. Further, results reported to 60 and 90 cm show that the pattern of losses and gains extend beyond the IPCC accounting depth of 30 cm. Specific causes for the soil C and N changes are unknown, but appear to be related to land use. In general, the losses under dairying correspond to systems with greater stocking rates, fertiliser inputs and removal of C and N in exported products. Gains in hill country pastures may be due to long-term recovery from erosion and disturbance following land clearance. The unexpected and contrary changes of C and N in different pasture systems (initially thought to be at steady state) demonstrates the need for global and national-scale collection of robust data investigating soil biogeochemical changes, not only for grasslands but also for other land uses. Re-sampling of soils can constrain the directions and magnitude of soil C and N change associated with land use and management to underpin C and N inventories and correctly identify mitigation options.

year: 2010

title: Protection of Threatened Species in New Zealand

authors: Wallace, Philippa Jane

subjects: Threatened species

abstract: The need to protect threatened species and facilitate their recovery to viable population levels enjoys widespread international support, but it is the domestic legal rules of individual nations that will implement international calls for protection and recovery. New Zealand purports to protect threatened species primarily with the Wildlife Act 1953, a statute whose purpose is more concerned with wildlife management than implementing a legal framework to protect threatened species. The consensus is that the Wildlife Act 1953 and other applicable legislation such as the Resource Management Act 1991 is not up to the task of protection and recovery of threatened species in New Zealand. In this article we explore how dedicated threatened species legislation in New Zealand might improve on the existing legal framework, and in particular with respect to the designation and planning on threatened species, recovery programmes and habitat protection. For an illustration of how these components may contribute to the threatened species problem we look to Canada as a nation which enacted dedicated threatened species legislation in 2002. The story thus far in Canada suggests legal rules are not a panacea for species decline, but nonetheless dedicated legislation can offer substantial benefits such as transparency and a systematic approach to species planning, better integration with resource development, and a measure of accountability in law to hold public officials to their promises on threatened species protection.

text: Protection of Threatened Species in New Zealand The need to protect threatened species and facilitate their recovery to viable population levels enjoys widespread international support, but it is the domestic legal rules of individual nations that will implement international calls for protection and recovery. New Zealand purports to protect threatened species primarily with the Wildlife Act 1953, a statute whose purpose is more concerned with wildlife management than implementing a legal framework to protect threatened species. The consensus is that the Wildlife Act 1953 and other applicable legislation such as the Resource Management Act 1991 is not up to the task of protection and recovery of threatened species in New Zealand. In this article we explore how dedicated threatened species legislation in New Zealand might improve on the existing legal framework, and in particular with respect to the designation and planning on threatened species, recovery programmes and habitat protection. For an illustration of how these components may contribute to the threatened species problem we look to Canada as a nation which enacted dedicated threatened species legislation in 2002. The story thus far in Canada suggests legal rules are not a panacea for species decline, but nonetheless dedicated legislation can offer substantial benefits such as transparency and a systematic approach to species planning, better integration with resource development, and a measure of accountability in law to hold public officials to their promises on threatened species protection.

year: 2016

title: Approaching Māori language through meaning: The predominance of Indo-European models of relationships within propositions

authors: Whaanga, Hēmi

subjects: Te reo Māori

abstract: In every language, there are relationships between predicators (such as, for example, 'go'/'haere') and arguments (such as, for example, ‘James'/'Hēmi’). One such relationship that has been proposed is that of agency. Thus, in 'James goes'/ ‘E haere ana a Hēmi’), 'James'/'Hēmi' can be said to be the agent of the action 'go'/'haere'. Much of the international literature on relationships of this type is based on research on English and it has been claimed that the relationships that have been identified are universals. However, there may be differences among languages, differences that are attributable to the fact that different languages encode different ways of perceiving divisions in perceptual space. My aim here is to demonstrate, with reference to a number of different models of predicator/ argument relations, that most of them are based on assumptions that derive from the structure of Indo-European languages, English in particular. In Part 2 of this paper (to appear in a subsequent issue of this Journal), the implications of this discussion will be examined with reference to an analysis of Māori in terms of relationships within propositions.

text: Approaching Māori language through meaning: The predominance of Indo-European models of relationships within propositions In every language, there are relationships between predicators (such as, for example, 'go'/'haere') and arguments (such as, for example, ‘James'/'Hēmi’). One such relationship that has been proposed is that of agency. Thus, in 'James goes'/ ‘E haere ana a Hēmi’), 'James'/'Hēmi' can be said to be the agent of the action 'go'/'haere'. Much of the international literature on relationships of this type is based on research on English and it has been claimed that the relationships that have been identified are universals. However, there may be differences among languages, differences that are attributable to the fact that different languages encode different ways of perceiving divisions in perceptual space. My aim here is to demonstrate, with reference to a number of different models of predicator/ argument relations, that most of them are based on assumptions that derive from the structure of Indo-European languages, English in particular. In Part 2 of this paper (to appear in a subsequent issue of this Journal), the implications of this discussion will be examined with reference to an analysis of Māori in terms of relationships within propositions.

year: 2001-09