The use of ultraviolet-blocking films in insect pest management in the UK; effects on naturally occurring arthropod pest and natural enemy populations in a protected cucumber crop

Studies in polytunnels were conducted to investigate the effects of ultraviolet (UV)-blocking films on naturally occurring insect pests and their arthropod natural enemies on a cucumber crop. Within tunnels clad with Antibotrytis (blocks light < 400 nm) and UVI/EVA (UV transmitting), 5.8 and 23.4 times more aphids, respectively, were recorded on traps compared with those on traps within tunnels clad with XL 385 (blocks light < 385 nm). When all plants within the UVI/EVA tunnels had become heavily infested with aphids, half of the plants in XL 385 tunnels were uninfested. More Coleoptera and thrips (approximately two times) were recorded under the UVI/EVA film than under the UV-blocking films, but for other arthropod pests (e. g. whitefly, leafhoppers), clear conclusions could not be drawn as low numbers were recorded. Substantial numbers of chalcid parasitoids and syrphids were found under the UV-blocking films, but further research is needed to evaluate fully the effect of such films on biological control of aphids. Higher syrphid numbers and more aphid mummies were recorded under the UVI/EVA film, probably because of the higher numbers of aphids present in tunnels clad with this film. The potential that UV-blocking films have as an effective component of commercial Integrated Pest Management (IPM) systems, for protected horticultural crops, is discussed.

Multiple diversity measures to identify complementary conservation areas for the Baja California peninsular cacti

The Baja California Peninsula is home to 85 species of cacti, of which 54 are endemic, highlighting its importance as a cactus diverse region within Mexico. Many species are under threat due to collection pressure and habitat loss, but ensuring maximal protection of cacti species requires a better understanding of diversity patterns. We assessed species richness, endemism, and phylogenetic and morphological diversity using herbarium records and a molecular phylogeny for 82 species of cacti found in the peninsula. The four diversity measures were estimated for the existing nature reserve network and for 314 hexagrids of 726 km2. Using the hexagrid data, we surveyed our results for areas that best complement the current protected cacti diversity in the Baja California Peninsula. Currently, the natural reserve network in Baja shelters an important amount of the cacti diversity (74% of the species, 85.9% of the phylogenetic diversity, 76% of endemics and all the growth forms). While species richness produced several solutions to complement the diversity protected, by identifying priority species (endemic species with high contribution to overall PD) one best solution is reported. Three areas (San Matías, Magdalena and Margarita Islands and El Triunfo), selected using species richness, PD and endemism, best complement the diversity currently protected, increasing species richness to 89%, PD to 94% and endemism to 89%, and should be considered in future conservation plans. Two of these areas could be included within nature reserves already established.

Stability of pollination services decreases with isolation from natural areas despite honey bee visits

Sustainable agricultural landscapes by definition provide high magnitude and stability of ecosystem services, biodiversity and crop productivity. However, few studies have considered landscape effects on the stability of ecosystem services. We tested whether isolation from florally diverse natural and semi-natural areas reduces the spatial and temporal stability of flower-visitor richness and pollination services in crop fields. We synthesised data from 29 studies with contrasting biomes, crop species and pollinator communities. Stability of flower-visitor richness, visitation rate (all insects except honey bees) and fruit set all decreased with distance from natural areas. At 1 km from adjacent natural areas, spatial stability decreased by 25, 16 and 9% for richness, visitation and fruit set, respectively, while temporal stability decreased by 39% for richness and 13% for visitation. Mean richness, visitation and fruit set also decreased with isolation, by 34, 27 and 16% at 1 km respectively. In contrast, honey bee visitation did not change with isolation and represented > 25% of crop visits in 21 studies. Therefore, wild pollinators are relevant for crop productivity and stability even when honey bees are abundant. Policies to preserve and restore natural areas in agricultural landscapes should enhance levels and reliability of pollination services.

Contested institutions? Traditional leaders and land access and control in communal areas of Eastern Cape Province, South Africa

The South African government has endeavoured to strengthen property rights in communal areas and develop civil society institutions for community-led development and natural resource management. However, the effectiveness of this remains unclear as the emergence and operation of civil society institutions in these areas is potentially constrained by the persistence of traditional authorities. Focusing on the former Transkei region of Eastern Cape Province, three case study communities are used examine the extent to which local institutions overlap in issues of land access and control. Within these communities, traditional leaders (chiefs and headmen) continue to exercise complete and sole authority over land allocation and use this to entrench their own positions. However, in the absence of effective state support, traditional authorities have only limited power over how land is used and in enforcing land rights, particularly over communal resources such as rangeland. This diminishes their local legitimacy and encourages some groups to contest their authority by cutting fences, ignoring collective grazing decisions and refusing to pay ‘fees’ levied on them. They are encouraged in such activities by the presence of democratically elected local civil society institutions such as ward councillors and farmers’ organisations, which have broad appeal and are increasingly responsible for much of the agrarian development that takes place, despite having no direct mandate over land. Where it occurs at all, interaction between these different institutions is generally restricted to approval being required from traditional leaders for land allocated to development projects. On this basis it is argued that a more radical approach to land reform in communal areas is required, which transfers all powers over land to elected and accountable local institutions and integrates land allocation, land management and agrarian development more effectively.

Compensation and Rewards for Environmental Services (CRES) and efficient design of contracts in developing countries. Behavioral insights from a natural field experiment

The use of economic incentives for biodiversity (mostly Compensation and Reward for Environmental Services including Payment for ES) has been widely supported in the past decades and became the main innovative policy tools for biodiversity conservation worldwide. These policy tools are often based on the insight that rational actors perfectly weigh the costs and benefits of adopting certain behaviors and well-crafted economic incentives and disincentives will lead to socially desirable development scenarios. This rationalist mode of thought has provided interesting insights and results, but it also misestimates the context by which ‘real individuals’ come to decisions, and the multitude of factors influencing development sequences. In this study, our goal is to examine how these policies can take advantage of some unintended behavioral reactions that might in return impact, either positively or negatively, general policy performances. We test the effect of income's origin (‘Low effort’ based money vs. ‘High effort’ based money) on spending decisions (Necessity vs. Superior goods) and subsequent pro social preferences (Future pro-environmental behavior) within Madagascar rural areas, using a natural field experiment. Our results show that money obtained under low effort leads to different consumption patterns than money obtained under high efforts: superior goods are more salient in the case of low effort money. In parallel, money obtained under low effort leads to subsequent higher pro social behavior. Compensation and rewards policies for ecosystem services may mobilize knowledge on behavioral biases to improve their design and foster positive spillovers on their development goals.

Integrated natural resource management in Australia: the opportunity offered by a national coastal policy

Under the Australian Constitution the management (and planning) of Crown Land is a State and Territory Government responsibility. When this is considered in conjunction with the Offshore Constitutional Settlement, which affirmed that coastal waters out to three nautical miles (in general) offshore were also the responsibility of State and Territory Governments, then clearly coastal management in Australia is largely a State/Territory responsibility.

Beyond three nautical miles it is a different story. Under the United Nations Law of the Sea Convention (UNCLOS), which Australia ratified in October 1994, Australia claims jurisdiction out to 200 nautical miles and beyond (Wescott, 2000). These waters cover an area including the Antarctic claim of over 15 million square kilometres or twice the land area of Australia.

Hence in marine and coastal terms we have the national (Commonwealth) Government managing the oceans and seven State and Territory governments largely in charge of coastal management (coastal land and coastal waters). Heading "up river", State and Territory Governments plan and manage catchments.

Given the uncoordinated relationships between Australian coastal management policy and both catchment management policy and Australia's Ocean Policy (Commonwealth of Australia, 1998a and b), the Commonwealth Government's commitment to a "National Coastal Policy" presents an opportunity to progress the integration of natural resources management for the first time in decades.

The Victorian living with possums policy : a review

Possums in urban areas can cause problems for residents when they live in the roof cavity of homes. The Victorian Living With Possums policy was implemented by the Department of Natural Resources and Environment (DNRE) in 1997 to address the ineffective, illegal and inhumane nature of possum management practices. Human-possum conflicts in urban areas can be difficult to resolve, and it is therefore important that the Living With Possums policy is effectively reaching the community and other stakeholders (e.g. vets, local councils).

This study represents Stage 1 of a two-part research project that aims to examine community awareness of and compliance with the policy and relevant legislation. A pilot questionnaire was designed and distributed to a sample of individuals who have recently hired possum traps from local councils or private organisations within metropolitan Melbourne. Preliminary findings indicate that although there is some level of awareness about the Living with Possums policy, there is evidence of non-compliance and a lack of understanding about the detailed policy guidelines. In Stage 2 of this project, questionnaires will be distributed to a larger sample of individuals who are experiencing conflicts with possums in order to examine just how widespread this lack of compliance and awareness is.

Forgotten outcomes for rural areas in central policy-making : the case of blue gums in Australia

The expansion of private forestry and the partnership between government and private sector timber growers and processors highlights the issues associated with a functionally based rather than a place based approaches to changing patterns of land use in rural areas. Rural development through blue gum forestry was promoted as a means of revitalising rural communities, providing both economic and social gains to regional areas. The purpose of this study is to examine the economic consequences of policies designed to promote plantation forestry at a local level. It concludes that while plantation forestry may bring benefits to the national economy, these benefits may not be apparent at a local level especially if the industry operates in competition with a viable alternative.

The politics of 'sustainability': a critical discourse analysis of Victorian Government policy discourse, 1999-2006

Since its emergence during the 1980s the idea of sustainability has come to provide the dominant frame within which environmental policy is debated. Thus, for many ‘sustainability’ represents the best way to address the economic, social and environmental effects of the myriad of environmental issues facing human societies, including biodiversity loss, soil erosion, pollution of waterways, ozone depletion and climate change. There are however, widely divergent views advocated as to what sustainability means, which has important implications for how serious environmental issues are understood to be, why they are important, what has caused them, and what needs to be done to address them. Given the diversity of such views, the consequences for policy making, and the likelihood of effective responses being developed, are self evident. Within this context, this thesis investigates the politics of sustainability, focussing particularly on the way in which it is defined, because of the implications this has for the way in which environmental issues are understood and addressed. Following a review of various approaches to analysing environmental policy (traditional, mainstream, ecopolitical and discursive), Norman Fairclough’s approach to discourse analysis (Critical Discourse Analysis) was identified as having particular merit. Fairclough’s approach avoids the assumption that policy issues exist independently of the way they are framed and offers a perspective on discourse that links the social theoretical concerns of Foucault with the micro level concerns of linguistics. It also provides a means for taking environmental policy analysis in directions that that have attracted relatively limited attraction, namely the detailed analysis of the ideological effects of language on environmental policy. In this thesis Fairclough’s approach is used to explore how three storylines of sustainability (sustainable development, environmentally sustainable growth and transforming society) and their associated discourses shaped environmental policy making in Victoria, Australia, between 1999 and 2006. In undertaking this analysis, I examined the political and institutional context informing policy making (social practice); the contested process of text production (discourse practice), and; the detailed wording of a policy text (textual analysis). A major policy statement on environmental sustainability released by the Victorian Government in 2005 is subjected to detailed analysis. Based on the analysis undertaken, the substantive finding from this research is that rather than moving beyond neoliberalism, the Victorian Government embraced an approach to sustainability that was informed by neoliberalism and (weak) ecological modernisation, which constructs sustainability in ways that limit its importance and constrain the types of responses that could be advocated. In doing so, it drew heavily on notions of natural assets and ecosystems services as ways to make sense of the environment and why it is important. The Victorian Government also highlighted that environmental issues are caused by the cumulative effects of individual choices, and emphasized the importance of individual choice and behavioural change as central features of sustainability, while restricting opportunities for more transformative ideas to be heard. The broader conclusion arising from this research is that approaches to environmental policy that rely on neoliberal and (weak) ecological modern discourses are flawed, because, in commodifying nature, limiting the nature and magnitude of change required, and placing responsibility onto individuals they offer a constrained understanding of the challenge of sustainability and what needs to be done about it. The overall contribution made by this research is an improved understanding of the discursive nature of the politics of sustainability and the influence of neoliberalism and ecological modernisation, the use of a methodology that has attracted relatively limited attention within environmental policy (despite its widespread use in other areas of policy) and the documentation of a period of significant environmental policy reform in Victoria.