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The expansion and challenges of protected areas (pas) in conserving biodiversity. Pas serve various functions, but their effectiveness is not close to sustainable standards due to limited resources and competing objectives. The document also covers the benefits and challenges of protected areas, how effectiveness is assessed, and future prospects for protecting biodiversity. Additionally, it touches upon the concepts of density dependence, coexistence, and balancing food production with environmental sustainability.
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Define and discuss key issues of protected areas o PAs expanding geographically , but ecosystems continue to fragment o PAs serve many functions – conserve habitat for wildlife and landscapes, livelihood of communities, increase tourism economy, replenish fisheries, and adaption to climate change Competing objectives and constant changing focus o Areas need to have high productivity but low economic potential o Not a lot of data on protected areas Protected area coverage of marine species or important biodiversity areas Impact of increasing demands Benefits and challenges of protection areas o Benefits Well managed protected areas reduce rates of habitat loss Maintain species population levels, including threatened species Provide ecosystem services – water, food security, protection of wild crops, maintenance of wild fish stock and carbon storage As communities urbanize these roles become more vital o Challenges Increase in protected areas = increased community contact Growth in area conflicts with community needs / economic development Areas do not have enough coverage in places that are important for biodiversity or are ecologically representative Governments going back on commitment to protect areas via funding cuts , reducing professional staff Changes in policy open areas up to resource extraction PADDD – protected area downgrading, downsizing, and degazette Downgrading – legal authorization in increased human activity Downsizing – authorization of boundary change Degazette – loss of legal protection for entire area How is “effectiveness” assessed o A measurement of effective management low habitat loss or degradation, stable species populations o Non-effectiveness is primarily due to limited resources for management Access core findings and conclusions of paper o Geographical area of areas is increasing globally , effectiveness isn’t close to sustainable standards
o Countries are still short of what was formally agreed on at the 2020 CBD strategic plan o Resources provided for protected areas are insufficien t, countries are failing to take action to maintain the areas they already have Future prospects for protecting biodiversity Necessary increase in support of global protected area estates o Countries need to create management regimes for existing areas that ensure they are effective Acknowledgment that the widening expectations for areas requires improvements not decline in policy and resource support o Countries need to invest adequately in protected areas to ensure they are effective o Accept that governments often don’t supply financial resources, and encourage the local community to take collective responsibility for the area o Countries need to expand protected area networks to meet CBD obligations and the needs outlined in the review Issues of protection relate to conservation biology as a crisis discipline o Imprecise definition of protected areas o Many ways to manage protection Inconsistency with policy While dealing with climate change o Limited demographic and distributional information Define density dependence – positive and negative – and the ways it affects the ability of species to coexist o Density dependence – growth rate in population is regulated by the density of a population o Positive – population growth facilitated by population density o Negative – preventing dominant species from excluding other species Janzen-Connell hypothesis, natural enemies maintain biodiversity by elevation of mortality in species that occur at high density NDD high in tropical forests How is coexistence a mechanism of biodiversity o Prevents dominant species from excluding subordinate species Prevention of competitive exclusion in habitats with many species relying on similar resources Biodiversity in absence of density dependence, and mechanisms of biodiversity that arise
Complicated to understand ecosystem dynamics Each ecosystem is different, skills/knowledge is on a local scale Farmers need to be educated in different methods/ technologies o Requires cooperation amongst farmers Tragedy of the commons Social capital must be built between farmers o SI requires continuous change as conditions change o Policies to encourage SI practices are poorly developed Should reward farmers for trying to reduce environmental impact Solutions proposed, role for corporations could play in production and distribution o SI o IPM (integrated pest management) – different methods of intervention that combine chemical, cultural, agronomic and biological techniques to effectively manage pests SI and IPM increase yield and reduce dependence on pesticide use o Policy change o Plant-based Animal products – milk/meat – are carbon insufficient Reduces land use, GHG emissions, and acidification o Reusable or sustainable packaging o Less food waste Production, durable packaging, use of co-products o Need for sustainability test – metrics that can determine if companies are truly sustainable