Biodiversity action plan

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Diademed sifaka, an endangered primate of Madagascar Diademed ready to push off.jpg
Diademed sifaka, an endangered primate of Madagascar

A biodiversity action plan (BAP) is an internationally recognized program addressing threatened species and habitats and is designed to protect and restore biological systems. The original impetus for these plans derives from the 1992 Convention on Biological Diversity (CBD). As of 2009, 191 countries have ratified the CBD, but only a fraction of these have developed substantive BAP documents.

Contents

The principal elements of a BAP typically include: [1] (a) preparing inventories of biological information for selected species or habitats; (b) assessing the conservation status of species within specified ecosystems; (c) creation of targets for conservation and restoration; and (d) establishing budgets, timelines and institutional partnerships for implementing the BAP.

Species plans

Snow leopard, Pakistan, an endangered species Lightmatter snowleopard.jpg
Snow leopard, Pakistan, an endangered species

A fundamental method of engagement to a BAP is thorough documentation regarding individual species, with emphasis upon the population distribution and conservation status. This task, while fundamental, is highly daunting, since only an estimated ten percent of the world’s species are believed to have been characterized as of 2006, [2] most of these unknowns being fungi, invertebrate animals, micro-organisms and plants. For many bird, mammal and reptile species, information is often available in published literature; however, for fungi, invertebrate animals, micro-organisms and many plants, such information may require considerable local data collection. It is also useful to compile time trends of population estimates in order to understand the dynamics of population variability and vulnerability. In some parts of the world complete species inventories are not realistic; for example, in the Madagascar dry deciduous forests, many species are completely undocumented and much of the region has never even been systematically explored by scientists.

A species plan component of a country’s BAP should ideally entail a thorough description of the range, habitat, behaviour, breeding and interaction with other species. Once a determination has been made of conservation status (e.g. rare, endangered, threatened, vulnerable), a plan can then be created to conserve and restore the species population to target levels. Examples of programmatic protection elements are: habitat restoration; protection of habitat from urban development; establishment of property ownership; limitations on grazing or other agricultural encroachment into habitat; reduction of slash-and-burn agricultural practises; outlawing killing or collecting the species; restrictions on pesticide use; and control of other environmental pollution. The plan should also articulate which public and private agencies should implement the protection strategy and indicate budgets available to execute this strategy.

Agricultural Plans

Agricultural practices can reduce the biodiversity of a region significantly. [3] Biodiversity Action Plans for agricultural production are necessary to ensure a biodiversity friendly production. It has not been common for companies to integrate biodiversity aspects into their value chain, but some companies and organizations have shown overall efforts for implementing better practices. [4]

An existing example for guidelines on biodiversity practices in agriculture is the Biodiversity Action Plan for spice production in India. [5] By planning and implementing biodiversity friendly measures, farmers can mitigate negative impacts and support positive influences.

Habitat plans

Where a number of threatened species depend upon a specific habitat, it may be appropriate to prepare a habitat protection element of the Biodiversity Action Plan. Examples of such special habitats are: raised acidic bogs of Scotland; Waterberg Biosphere bushveld in South Africa; California’s coastal wetlands; and Sweden’s Stora Alvaret on the island of Öland. In this case also, careful inventories of species and also the geographic extent and quality of the habitat must be documented. Then, as with species plans, a program can be created to protect, enhance and/or restore habitat using similar strategies as discussed above under the species plans.

Specific countries

Some examples of individual countries which have produced substantive Biodiversity Action Plans follow. In every example the plans concentrate on plants and vertebrate animals, with very little attention to neglected groups such as fungi, invertebrate animals and micro-organisms, even though these are also part of biodiversity. Preparation of a country BAP may cost up to 100 million pounds sterling, with annual maintenance costs roughly ten percent of the initial cost. If plans took into account neglected groups, the cost would be higher. Obviously costs for countries with small geographical area or simplified ecosystems have a much lesser cost. For example, the St. Lucia BAP has been costed in the area of several million pounds sterling. [6]

Australia

The Daintree Rainforest in Queensland, Australia Daintree Rainforest.JPG
The Daintree Rainforest in Queensland, Australia

Australia has developed a detailed and rigorous Biodiversity Action Plan. [7] This document estimates that the total number of indigenous species may be 560,000, many of which are endemic. A key element of the BAP is protection of the Great Barrier Reef, which is actually in a much higher state of health than most of the world’s reefs, Australia having one of the highest percentages of treated wastewater. [8] There are however serious ongoing concerns, particularly in regards to the ongoing negative impact on water quality from land use practices. Also, climate change impact is feared to be significant.

Considerable analysis has been conducted on the sustainable yield of firewood production, a major threat to deforestation in most tropical countries. Biological inventory work; assessment of harvesting practices; and computer modeling of the dynamics of treefall, rot and harvest; have been carried out to adduce data on safe harvesting rates. Extensive research has also been conducted on the relation of brush clearance to biodiversity decline and impact on water tables; [9] for example, these effects have been analyzed in the Toolibin Lake wetlands region.

New Zealand

New Zealand has ratified the Convention on Biological Diversity and as part of The New Zealand Biodiversity Strategy and Biodiversity Action Plans are implemented on ten separate themes. [10]

Local government and some companies also have their own Biodiversity Action Plan.

St. Lucia

The St. Lucia BAP recognizes impacts of large numbers of tourists to the marine and coastal diversity of the Soufrière area of the country. The BAP specifically acknowledges that the carrying capacity for human use and water pollution discharge of sensitive reef areas was exceeded by the year 1990. The plan also addresses conservation of the historic island fishing industry. In 1992, several institutions in conjunction with native fishermen to produce a sustainable management plan for fishery resources, embodied in the Soufrière Marine Management Area.

The St. Lucia BAP features significant involvement from the University of the West Indies. Specific detailed attention is given to three species of threatened marine turtles, to a variety of vulnerable birds and a number of pelagic fishes and cetaceans. In terms of habitat conservation the plan focusses attention on the biologically productive mangrove swamps and notes that virtually all mangrove areas had already come under national protection by 1984. [11]

Tanzania

The Tanzania national BAP addresses issues related to sustainable use of Lake Manyara, an extensive freshwater lake, whose usage by humans accelerated in the period 1950 to 1990. The designation of the Lake Manyara Biosphere Reserve under UNESCO's Man and the Biosphere Programme in 1981 combines conservation of the lake and surrounding high value forests with sustainable use of the wetlands area and simple agriculture. This BAP has united principal lake users in establishing management targets. The biosphere reserve has induced sustainable management of the wetlands, including monitoring groundwater and the chemistry of the escarpment water source. [12]

United Kingdom

Fowlsheugh cliffs, Scotland, a protected seabird breeding habitat Fowlsheughclifftonorthsea.JPG
Fowlsheugh cliffs, Scotland, a protected seabird breeding habitat

The United Kingdom Biodiversity Action Plan covers not only terrestrial species associated with lands within the UK, but also marine species and migratory birds, which spend a limited time in the UK or its offshore waters. The UK plan encompasses "391 Species Action Plans, 45 Habitat Action Plans and 162 Local Biodiversity Action Plans with targeted actions". [13] This plan is noteworthy because of its extensive detail, clarity of endangerment mechanisms, specificity of actions, follow up monitoring program and its inclusion of migrating cetaceans and pelagic birds.

On August 28, 2007, the new Biodiversity Action Plan (BAP) [launched in 1997] identified 1,149 species and 65 habitats in the UK that needed conservation and greater protection. The updated list included the hedgehog, house sparrow, grass snake and the garden tiger moth, while otters, bottlenose dolphins and red squirrels remained in need of habitat protection. [14]

In May 2011, the European Commission adopted a new strategy to halt the loss of biodiversity and ecosystem services in the EU by 2020, in line with the commitments made at the 10th meeting of the Convention on Biological Diversity (CBD) held in Nagoya, Japan in 2010. In 2012 the UK BAP was succeeded by the 'UK Post-2010 Biodiversity Framework'.

UK BAP website

To support the work of the UK BAP, the UK BAP website was created by JNCC in 2001. The website contained information on the BAP process, hosted all relevant documents, and provided news and relevant updates. In March 2011, as part of the UK government’s review of websites, the UK BAP site was ‘closed’, and the core content was migrated into the JNCC website. [15] Content from the original UK BAP website has been archived by the National Archives as snapshots from various dates (for example, UK BAP: copy March 2011; [16] copy 2012 [17] ).

United States

Twenty-six years prior to the international biodiversity convention, the United States had launched a national program to protect threatened species in the form of the 1966 Endangered Species Act. The legislation created broad authority for analyzing and listing species of concern, and mandated that Species Recovery Plans be created. Thus, while the USA is an unratified signer of the accord, arguably it has the longest track record and most comprehensive program of species protection of any country. There are about 7000 listed species (e.g. endangered or threatened), of which about half have approved Recovery Plans. While this number of species seems high compared to other countries, the value is rather indicative of the total number of species characterized, which is extremely large.

Uzbekistan

Five major divisions of habitat have been identified in Uzbekistan’s BAP: Wetlands (including reed habitat and man-made marsh); desert ecosystems (including sandy, stony and clay); steppes; riparian ecosystems; and mountain ecosystems. Over 27,000 species have been inventoried in the country, with a high rate of endemism for fishes and reptiles. Principal threats to biodiversity are related to human activities associated with overpopulation and generally related to agricultural intensification. [18] Major geographic regions encompassed by the BAP include the Aral Sea Programme (threatened by long-term drainage and salination, largely for cotton production), the Nuratau Biosphere Reserve, and the Western Tien Shan Mountains Programme (in conjunction with Kazakhstan and Kyrgyzstan).

Criticism

Some developing countries criticize the emphasis of BAPs, because these plans inherently favour consideration of wildlife protection above food and industrial production, and in some cases may represent an obstacle to population growth. The plans are costly to produce, a fact which makes it difficult for many smaller countries and poorer countries to comply. In terms of the plans themselves, many countries have adopted pro-forma plans including little research and even less in the way of natural resource management. Almost universally, this has resulted in plans which emphasize plants and vertebrate animals, and which overlook fungi, [19] invertebrate animals and micro-organisms. With regard to specific world regions, there is a notable lack of substantive participation by most of the Middle Eastern countries and much of Africa, the latter of which may be impeded by economic considerations of plan preparation. Some governments such as the European Union have diverted the purpose of a biodiversity action plan, and implemented the convention accord by a set of economic development policies with referencing certain ecosystems' protection.

Biodiversity planning: a new way of thinking

The definition of biodiversity under the Convention on Biological Diversity now recognises that biodiversity is a combination of ecosystem structure and function, as much as its components e.g. species, habitats and genetic resources. Article 2 states:

in addressing the boundless complexity of biological diversity, it has become conventional to think in hierarchical terms, from the genetic material within individual cells, building up through individual organisms, populations, species and communities of species, to the biosphere overall...At the same time, in seeking to make management intervention as efficient as possible, it is essential to take an holistic view of biodiversity and address the interactions that species have with each other and their non-living environment, i.e. to work from an ecological perspective.

The World Summit on Sustainable Development endorsed the objectives of the Convention on Biological Diversity to “achieve by 2010 a significant reduction of the current rate of biodiversity loss at the global, regional and national level as a contribution to poverty alleviation and to the benefit of life on Earth”. To achieve this outcome, biodiversity management will depend on maintaining structure and function. [20]

Biodiversity is not singularly definable but may be understood via a series of management principles under BAPs, such as:

1. that biodiversity is conserved across all levels and scales – structure, function and composition are conserved at site, regional, state and national scales. 2. that examples of all ecological communities are adequately managed for conservation. 3. ecological communities are managed to support and enhance viable populations of animals, fungi, micro-organisms and plants and ecological functions.

Biodiversity and wildlife are not the same thing. The traditional focus on threatened species in BAPs is at odds with the principles of biodiversity management because, by the time species become threatened, the processes that maintain biodiversity are already compromised. Individual species are also regarded as generally poor indicators of biodiversity when it comes to actual planning. [21] A species approach to BAPs only serves to identify and at best, apply a patch to existing problems. Increasingly, biodiversity planners are looking through the lens of ecosystem services. Critics of biodiversity are often confusing the need to protect species (their intrinsic value) with the need to maintain ecosystem processes, which ultimately maintain human society and do not compromise economic development. Hence, a core principle of biodiversity management, that traditional BAPs overlook, is the need to incorporate cultural, social and economic values in the process.

Modern day BAPs use an analysis of ecosystem services, key ecological process drivers, and use species as one of many indicators of change. They would seek to maintain structure and function by addressing habitat connectivity and resilience and may look at communities of species (threatened or otherwise) as one method of monitoring outcomes. Ultimately, species are the litmus test for biodiversity – viable populations of species can only be expected to exist in relatively intact habitats. However, the rationale behind BAPs is to "conserve and restore" biodiversity. One of the fastest developing areas of management is biodiversity offsets. The principles are in keeping with ecological impact assessment, which in turn depends on good quality BAPs for evaluation. Contemporary principles of biodiversity management, such as those produced by the Business Biodiversity Offsets Program [22] are now integral to any plans to manage biodiversity, including the development of BAPs.

See also

Related Research Articles

<span class="mw-page-title-main">Convention on Biological Diversity</span> International treaty on biological diversity

The Convention on Biological Diversity (CBD), known informally as the Biodiversity Convention, is a multilateral treaty. The Convention has three main goals: the conservation of biological diversity ; the sustainable use of its components; and the fair and equitable sharing of benefits arising from genetic resources. Its objective is to develop national strategies for the conservation and sustainable use of biological diversity, and it is often seen as the key document regarding sustainable development.

<span class="mw-page-title-main">Biodiversity</span> Variety and variability of life forms

Biodiversity is the variety and variability of life on Earth. It can be measured on various levels. There is for example genetic variability, species diversity, ecosystem diversity and phylogenetic diversity. Diversity is not distributed evenly on Earth. It is greater in the tropics as a result of the warm climate and high primary productivity in the region near the equator. Tropical forest ecosystems cover less than 100 of Earth's terrestrial face and contain about 50% of the world's species. There are latitudinal gradients in species diversity for both marine and terrestrial taxa.

<span class="mw-page-title-main">Biotope</span> Habitat for communities made up of populations of multiple species

A biotope is an area of uniform environmental conditions providing a living place for a specific assemblage of plants and animals. Biotope is almost synonymous with the term "habitat", which is more commonly used in English-speaking countries. However, in some countries these two terms are distinguished: the subject of a habitat is a population, the subject of a biotope is a biocoenosis or "biological community".

<span class="mw-page-title-main">Protected area</span> Areas protected for having ecological or cultural importance

Protected areas or conservation areas are locations which receive protection because of their recognized natural, ecological or cultural values. Protected areas are those areas in which human presence or the exploitation of natural resources is limited.

This is an index of conservation topics. It is an alphabetical index of articles relating to conservation biology and conservation of the natural environment.

In situ conservation is the on-site conservation or the conservation of genetic resources in natural populations of plant or animal species, such as forest genetic resources in natural populations of tree species. This process protects the inhabitants and ensures the sustainability of the environment and ecosystem.

<span class="mw-page-title-main">Conservation biology</span> Study of threats to biological diversity

Conservation biology is the study of the conservation of nature and of Earth's biodiversity with the aim of protecting species, their habitats, and ecosystems from excessive rates of extinction and the erosion of biotic interactions. It is an interdisciplinary subject drawing on natural and social sciences, and the practice of natural resource management.

<span class="mw-page-title-main">Habitat conservation</span> Management practice for protecting types of environments

Habitat conservation is a management practice that seeks to conserve, protect and restore habitats and prevent species extinction, fragmentation or reduction in range. It is a priority of many groups that cannot be easily characterized in terms of any one ideology.

<span class="mw-page-title-main">Agricultural biodiversity</span> Agricultural concept

Agricultural biodiversity or agrobiodiversity is a subset of general biodiversity pertaining to agriculture. It can be defined as "the variety and variability of animals, plants and micro-organisms at the genetic, species and ecosystem levels that sustain the ecosystem structures, functions and processes in and around production systems, and that provide food and non-food agricultural products.” It is managed by farmers, pastoralists, fishers and forest dwellers, agrobiodiversity provides stability, adaptability and resilience and constitutes a key element of the livelihood strategies of rural communities throughout the world. Agrobiodiversity is central to sustainable food systems and sustainable diets. The use of agricultural biodiversity can contribute to food security, nutrition security, and livelihood security, and it is critical for climate adaptation and climate mitigation.

<span class="mw-page-title-main">Habitat destruction</span> Process by which a natural habitat becomes incapable of supporting its native species

Habitat destruction occurs when a natural habitat is no longer able to support its native species. The organisms once living there have either moved to elsewhere or are dead, leading to a decrease in biodiversity and species numbers. Habitat destruction is in fact the leading cause of biodiversity loss and species extinction worldwide.

<span class="mw-page-title-main">Wildlife conservation</span> Practice of protecting wild plant and animal species and their habitats

Wildlife conservation refers to the practice of protecting wild species and their habitats in order to maintain healthy wildlife species or populations and to restore, protect or enhance natural ecosystems. Major threats to wildlife include habitat destruction, degradation, fragmentation, overexploitation, poaching, pollution, climate change, and the illegal wildlife trade. The IUCN estimates that 42,100 species of the ones assessed are at risk for extinction. Expanding to all existing species, a 2019 UN report on biodiversity put this estimate even higher at a million species. It is also being acknowledged that an increasing number of ecosystems on Earth containing endangered species are disappearing. To address these issues, there have been both national and international governmental efforts to preserve Earth's wildlife. Prominent conservation agreements include the 1973 Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) and the 1992 Convention on Biological Diversity (CBD). There are also numerous nongovernmental organizations (NGO's) dedicated to conservation such as the Nature Conservancy, World Wildlife Fund, the Wild Animal Health Fund and Conservation International.

<span class="mw-page-title-main">Golden Gate Biosphere Network</span>

The Golden Gate Biosphere Network is a voluntary coalition of federal, state, and local government agencies, nonprofit organizations, universities, and private partners within the Golden Gate Biosphere region. The Network aims to protect the region's biodiversity and conserve its natural resources, enhancing quality of life for local residents. The Network has been part of the UNESCO Man and Biosphere Programme since 1988 and is part of the US Biosphere Network and EuroMAB. It is recognized by UNESCO due to the significant biodiversity of the region, as well as the Network's efforts to demonstrate and promote a balanced relationship between humans and the biosphere.

<span class="mw-page-title-main">United Kingdom Biodiversity Action Plan</span> British response to the Convention on Biological Diversity

The United Kingdom Biodiversity Action Plan or (UK BAP) was the UK government's response to the Convention on Biological Diversity, opened for signature at the Rio Earth Summit in 1992. The UK was the first country to produce a national Biodiversity Action Plan. It was published in 1994 and created action plans for priority species and habitats in the UK that were most under threat so as to support their recovery.

<span class="mw-page-title-main">Landscape-scale conservation</span> Holistic approach to landscape management

Landscape-scale conservation is a holistic approach to landscape management, aiming to reconcile the competing objectives of nature conservation and economic activities across a given landscape. Landscape-scale conservation may sometimes be attempted because of climate change. It can be seen as an alternative to site based conservation.

<span class="mw-page-title-main">Biodiversity in agriculture</span> Increasing biodiversity in agriculture

Biodiversity in agriculture is the measure of biodiversity found on agricultural land. Biodiversity is the total diversity of species present in an area at all levels of biological organization. It is characterized by heterogeneous habitats that support the diverse ecological structure. In agricultural areas, biodiversity decreases as varying landscapes are lost and native plants are replaced with cultivated crops. Increasing biodiversity in agriculture can increase the sustainability of farms through the restoration of ecosystem services that aid in regulating agricultural lands. Biodiversity in agriculture can be increased through the process of agroecological restoration, as farm biodiversity is an aspect of agroecology.

<span class="mw-page-title-main">Ecological values of mangroves</span>

Mangrove ecosystems represent natural capital capable of producing a wide range of goods and services for coastal environments and communities and society as a whole. Some of these outputs, such as timber, are freely exchanged in formal markets. Value is determined in these markets through exchange and quantified in terms of price. Mangroves are important for aquatic life and home for many species of fish.

<span class="mw-page-title-main">Index of biodiversity articles</span>

This is a list of topics in biodiversity.

<span class="mw-page-title-main">Biodiversity in Suriname</span>

Biodiversity in Suriname is high, mostly because of the variety of habitats and the temperature. The average annual temperature in the coastal area is between 26° and 28°C. Suriname can be divided into four major ecological zones, namely from north to south;

  1. The young coastal plain
  2. The old coastal plain
  3. The Savannah or Zanderij belt
  4. The interior residual uplands.
<span class="mw-page-title-main">Biodiversity loss</span> Extinction of species or loss of species in a given habitat

Biodiversity loss happens when plant or animal species disappear completely from Earth (extinction) or when there is a decrease or disappearance of species in a specific area. Biodiversity loss means that there is a reduction in biological diversity in a given area. The decrease can be temporary or permanent. It is temporary if the damage that led to the loss is reversible in time, for example through ecological restoration. If this is not possible, then the decrease is permanent. The cause of most of the biodiversity loss is, generally speaking, human activities that push the planetary boundaries too far. These activities include habitat destruction and land use intensification. Further problem areas are air and water pollution, over-exploitation, invasive species and climate change.

The Landscape Conservation Cooperatives (LCC), established in 2009 in the United States, are a network of 22 regional conservation bodies covering the entire United States and adjacent areas. They are autonomous cooperatives sponsored by the U.S. Department of the Interior and aim to develop coordinated conservation strategies applicable to large areas of land. Partnerships are formed with government and non-government conservation organizations to achieve common goals of conservation. While fairly new as government supported entities, the LCCs are similar to initiatives that have been started or advocated in other countries.

References

  1. ↑ Glowka, Lyle; Françoise Burhenne-Guilmin; Hugh Synge; Jeffrey A. McNeely; Lothar Gündling (1994). Guide to the Convention on Biodiversity. IUCN. ISBN   2-8317-0222-4.
  2. ↑ IUCN Red-list statistics (2006) Archived June 30, 2006, at the Wayback Machine
  3. ↑ McLaughlin, Alison; Mineau, Pierre (1995). "The impact of agricultural practices on biodiversity" (PDF). Agriculture, Ecosystems & Environment. 55 (3): 201–212. doi:10.1016/0167-8809(95)00609-V – via Elsevier.
  4. ↑ "The Global Partnership for Business and Biodiversity". Convention on Biological Diversity.
  5. ↑ Private Business Action for Biodiversity Project. "Manual on biodiversity action plan for chili production" (PDF). International Klimate Initiative. Archived from the original (PDF) on October 15, 2019.{{cite web}}: |last= has generic name (help)
  6. ↑ Government of St. Lucia (2001). "National Biodiversity Strategy and Action Plan of St. Lucia". Archived from the original on November 5, 2006. Retrieved August 30, 2006.
  7. ↑ Natural Resource Management Ministerial Council (2011). "Australia's Biodiversity Conservation Strategy 2010-2030" (PDF). Retrieved December 7, 2012.
  8. ↑ Commonwealth of Australia, Department of the Environment and Heritage (September 2005). "Great Barrier Reef Water Quality Protection Plan Annual Report 2004-2005". Archived from the original on August 22, 2006. Retrieved August 30, 2006.
  9. ↑ Andreas Glanznig, Native Vegetation Clearance, Habitat Loss and Biodiversity Decline: an overview of recent native vegetation clearance in Australia and its implications for biodiversity, Biodiversity Series, Paper No. 6, Biodiversity Unit, June 1995
  10. ↑ The New Zealand Biodiversity Strategy. [Wellington, N.Z.]: Dept. of Conservation; Ministry for the Environment. February 2000. ISBN   978-0-478-21919-7.
  11. ↑ St. Lucia National Marine Fisheries Act of 1984, Section 10, (1984)
  12. ↑ "Lake Manyara". UNESCO. Retrieved June 16, 2016.
  13. ↑ Joint Nature Conservation Committee, London (2006). "United Kingdom Biodiversity Action Plan" . Retrieved August 31, 2006.
  14. ↑ BBC NEWS, Hedgehogs join 'protection' list
  15. ↑ Joint Nature Conservation Committee, London (2012). "UK Biodiversity Action Plan". Archived from the original on June 22, 2012. Retrieved October 28, 2012.
  16. ↑ National Archives, London (2011). "UK Biodiversity Action Plan archive copy". Archived from the original on March 3, 2011. Retrieved October 28, 2012.
  17. ↑ , JNCC. Accessed via National Archives, London (2012)
  18. ↑ Biodiversity Conservation National Strategy and Action Plan of Republic of Uzbekistan, 1997
  19. ↑ International Society for Fungal Conservation (2012). "Micheli Guide to Fungal Conservation" . Retrieved December 7, 2012.
  20. ↑ Noss, R.F. (1990) Indicators for Monitoring Biodiversity: A Hierarchical Approach. Conservation Biology 4 (4) 355–364.
  21. ↑ Lindenmayer, D. B., Manning, A. D., Smith, P. L., Possingham, Hugh P., Fischer, J., Oliver, I., McCarthy, M. A., (2002) The Focal-Species Approach and Landscape Restoration: A Conservation Biology 16(2) 338–345
  22. ↑ "Principles in Biodiversity Offsets". Archived from the original on March 28, 2009. Retrieved April 21, 2009.
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