Community action on biodiversity: Difference between revisions

Biodiversity or biological diversity is the variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic (genetic variability), species (species diversity), and ecosystem (ecosystem diversity) levels. Biodiversity is not distributed evenly on Earth; it is usually 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 10% of Earth's terrestrial surface and contain about 50% of the world's species. There are latitudinal gradients in species diversity for both marine and terrestrial taxa. Marine coastal biodiversity is highest globally speaking in the Western Pacific ocean steered mainly by the higher surface temperatures. In all oceans across the planet, marine species diversity peaks in the mid-latitudinal zones. Terrestrial species threatened with mass extinction can be observed in exceptionally dense regional biodiversity hotspots, with high levels of species endemism under threat. There are 36 such hotspot regions which require the world's attention in order to secure global biodiversity.

Rewilding is a form of ecological restoration aimed at increasing biodiversity and restoring natural processes. It differs from other forms of ecological restoration in that rewilding aspires to reduce human influence on ecosystems. It is also distinct from other forms of restoration in that, while it places emphasis on recovering geographically specific sets of ecological interactions and functions that would have maintained ecosystems prior to human influence, rewilding is open to novel or emerging ecosystems which encompass new species and new interactions.

A key feature of rewilding is its focus on replacing human interventions with natural processes. Rewilding enables the return of intact large mammal assemblages. This implies the natural groupings of large mammal species in an area to promote the restoration of trophic networks. The mechanism of rewilding is a process of rebuilding, to restore natural ecosystems by introducing or re-introducing large mammals to promote resilient, self-regulating, and self-sustaining ecosystems. Rewilding projects are usually part of programs for habitat restoration and conservation biology, and ideally they should be based on sound ecological theory and evidence.

While rewilding initiatives can be controversial, the United Nations has listed rewilding as one of several methods needed to achieve massive scale restoration of natural ecosystems, which they say must be accomplished by 2030 as part of the 30x30 campaign.

A wildlife garden (or habitat garden or backyard restoration) is an environment created with the purpose to serve as a sustainable haven for surrounding wildlife. Wildlife gardens contain a variety of habitats that cater to native and local plants, birds, amphibians, reptiles, insects, mammals and so on, and are meant to sustain locally native flora and fauna. Other names this type of gardening goes by can vary, prominent ones being habitat, ecology, and conservation gardening.

Both public and private gardens can be specifically transformed to attract the native wildlife, and in doing so, provide a natural array of support through available shelter and sustenance. This method of gardening can be a form of restoration in private gardens as much as those in public, as they contribute to connectivity due to the variability of their scattered locations, as well as an increased habitat availability.

Establishing a garden that emulates the environment before the residence was built and/or renders the garden similar to intact wild areas nearby (rewilding) will allow natural systems to interact and establish an equilibrium, ultimately minimizing the need for gardener maintenance and intervention. Wildlife gardens can also play an essential role in biological pest control, and also promote biodiversity, native plantings, and generally benefit the wider environment. Some environmental benefits include the reduction in pest populations through the natural mechanism of biological pest control, by helping reduce the need for pesticides. Habitat gardens also provide the environment an ecosystem service by recharging aquifers by intercepting rainfall.

A wildlife corridor, habitat corridor, or green corridor is an area of habitat connecting wildlife populations separated by human activities or structures (such as roads, development, or logging). This allows an exchange of individuals between populations, which may help prevent the negative effects of inbreeding and reduced genetic diversity (via genetic drift) that often occur within isolated populations. Corridors may also help facilitate the re-establishment of populations that have been reduced or eliminated due to random events (such as fires or disease). This may moderate some of the worst effects of habitat fragmentation, whereas urbanization can split up habitat areas, causing animals to lose both their natural habitat and the ability to move between regions to access resources. Habitat fragmentation due to human development is an ever-increasing threat to biodiversity, and habitat corridors serve to manage its effects.

The Nature Conservancy (TNC) is a global environmental organization headquartered in Arlington, Virginia. As of 2021, it works via affiliates or branches in 79 countries and territories, as well as across every state in the US.

Founded in 1951, The Nature Conservancy has over one million members globally as of 2021 and has protected more than 119,000,000 acres (48,000,000 ha) of land in its history. As of 2014, it is the largest environmental non-profit organization by assets and revenue in the Americas.

At the 9th World Wilderness Congress in Mérida, Mexico, WILD, with the collaboration of a spectrum of international organizations, governments and individuals, introduced Nature Needs Half, which aspires that humans give up use of half of land and water on Earth, in order to support wilderness. Marine biologist Sylvia Earle and Jane Goodall have endorsed Nature Needs Half, with Earle's only criticism being that she "hoped that half would be enough". Since its inception, WILD has begun collecting and conducting case studies of places around the world that have, or are on track to achieve, at least half protection.

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.

Biodiversity is the measure of biotic and abiotic diversity in an ecosystem, described by heterogeneity. The loss of biodiversity in agriculture has been an increasing issue since the global increase of food demands and success of popular crops. This loss of heterogeneity declines species biodiversity on agricultural lands. Biodiversity in agriculture is essential in providing ecosystem services, which conserves biodiversity while providing agricultural services.