In-Situ Conservation

In-Situ Conservation of Biodiversity (definition)

As we know already, the conservation of biodiversity refers to the protection, maintenance and study of living organisms and the way in which they interact with their surroundings. The focus falls on preventing their extinction, or on preventing the loss of their quality of life.

Pair "in situ" (meaning on-site) with "biodiversity conservation" and you get in-situ conservation, which gives species a protected status to allow them to interact with and be shaped by the natural world's complex processes.

Evolutionary processes that in-situ conservation allow include the free choice of mate, food and territory selection.

In-situ biodiversity conservation is sparked by the vulnerability status of a species. The International Union for Conservation of Nature (IUCN) is the largest independent body responsible for keeping records on animal species and deciding their protection and vulnerability statuses. IUCN often helps with biodiversity conservation efforts and provides guidelines for species reintroduction in their natural environments.¹

In-Situ Conservation Examples

The in-situ conservation of biodiversity can be said to have been practiced since ancient times.

Some of the most important instruments for large in-situ biodiversity conservation are protocols and legislation.

One of the most important parts of any laws and legislation is how they are enforced, and what official body or bodies are responsible for that. This approach is needed because in-situ conservation usually covers large areas that are not easily accessible or easy to monitor.

Sometimes, in-situ biodiversity conservation can be maintained or achieved through sustainable practices passed down as cultural heritage by individuals and communities.

In the UK, there are a number of designated habitats that are meant to protect both wildlife and the environment in which they live. These are covered by the Wildlife and Countryside Act 1981.

In-Situ Conservation Methods

Three main ways through which the conservation of habitats and wildlife takes place are land ownership, designated protected areas, and habitat creation and management.

Land Ownership

Land ownership refers to conservationists and organizations purchasing land to preserve its natural features and biodiversity. Because of the private nature of this action, owners can also use the purchased areas for economical needs. This may affect the land's conservation qualities.

Designated Protected Areas

Establishing designated protected areas means that the protected status has to be respected and followed - depending on legislation and on the communities living within the site.

In countries like England, farmers may be able to carry out animal rearing activities in National Parks, such as the Peak District, whereas in other parts of the world, such as Thailand's Khao Yai National Park, or Australia's Great Barrier Reef, animal rearing activities are prohibited.

In the Peak District, hikers can see mountain hares with conservation status, and in Australia's reef barrier, divers can spot protected leatherback sea turtles! Were they not protected, this would have not been possible.

Conserving a habitat or a protected area also means understanding its evolution in time (annual, biannual) and space (naturally shrinking, expanding).

River channelization is a process in which a river is dredged, straightened and has its curves removed bypassing much of the floodplain. This has disadvantages due to the fact rivers undergo many natural modifications depending on how much water they receive from rain and effluents. When the river channel is altered, there may be a greater risk of flooding lower down stream as the water will be carried there faster. Rivers need to have a floodplain for this reason.

The sand dune system at Morfa Harlech in North Wales is of international importance, supporting a range of plant communities from the naturally sparse vegetation of the shifting dunes, to species rich mature dune grasslands. Maintaining this mosaic of habitats involves managing the process of succession to stop scrub encroachment in certain areas.⁵

Habitat creation and management

Habitat creation and management can be achieved in a few different ways. Agri-environmental schemes, organic farming, or rotational grazing are such methods.

Organic farming, involving the use of non-industrial composts and fertilizers and biological pest controls, and rotational grazing, where animals only graze in a designated spot for a season and then are moved somewhere else, are methods used to preserve biodiversity

The intentional creation of habitats for in-situ conservation further involves the careful management of the biotic and abiotic factors.

An ideal habitat design may need to be connected to other habitats through biological corridors to allow for dispersal (seeds), water, light and shelter material availability. Other abiotic factors include pH of soils and water, mineral nutrients or salinity. Biotic management can include predation control, or invasive species control (e.g. Himalayan balsam), as well as immunization programs against viruses or pathogens that would endanger wildlife.

In-Situ Conservation Benefits

You will be noticing some juxtapositions here with other articles written as part of the topic Captive breeding and release programmes (CBR). This is because in-situ conservation is usually deemed cheaper and more efficient than ex-situ conservation... unless the habitats have been so irreversibly altered, that the animal has no chances of surviving the natural or man-made pressures!

In-situ conservation ensures that:

• The various relationships in nature (e.g. symbiotic) are maintained between different species.

• Natural areas remain reservoirs of plants and animals that people can use for therapeutic, medicinal, and other similar purposes. When a species' numbers are stable, people can harvest them without worrying about extinction events.

• Preserve quality genetic material, as long as a viable breeding population exists in-situ. Species reintroductions or relocations can make sure there are enough breeding adults at a site.

• Large sharks, whales, cheetahs or other species that have problems breeding or surviving in captivity, can still survive by reproducing in the wild.

In-Situ Conservation Disadvantages

If the in-situ habitat is affected in some way, such as by fragmentation or an altered climate (e.g. spring coming earlier), it may become harder for a population to survive.

High fragmentation may provide little shelter against one type of disease. This is because different animals will have to use the same corridors and passageways to move from one area to another, due to a lack of other "roads". All species using the same "common highways" allow parasites to spread quicker, for example, fleas (external), as well as internal parasites through contact with each others' faeces.

The species are less safe in large areas that are hard to control and monitor, especially if they are of poaching interest. Animals of poaching interest include tigers, snow leopards, elephants and pearl mussels. These species require large areas of dispersal.

Veterinary aid cannot typically be given unless a sickly individual is visually identified. Sometimes, not giving veterinary aid is for the better, as it allows for natural selection, but at other times, veterinary aid may be needed because of anthropogenic pressures. No veterinary care leads to a lower overall life expectancy in the wild.

In-situ conservation management can be difficult where there are overlapping communities competing for the same resources. Human territories also overlap with wild species'!