Wandering tigers, fractured landscapes

Tigers that have moved over vast areas in Karnataka

An animal cage sat on the back of a mini-lorry, and inside the cage was a young male tiger. About a week ago this animal, approximately three years old, was captured in Gama village near Shikaripura and was brought to Bhadra Tiger Reserve to be relocated. As the light started to fade the door of the squeeze cage was opened by a forest department watcher. Initially showing no signs of hurry the fine-looking animal sat inside cautiously watching the dry grassland in front of it. These grasslands were paddy fields a few years ago before people were relocated from this forest village called Hipla. Within a minute the animal realised that the forests were a better home than the cage, jumped out and bolted into the nearby bushes. Hope it has found a place in Bhadra to establish as a resident male, and with a bit of luck it will lord over its own territory for the next few years.

Experts initially thought the animal had strayed out of the Bhadra Tiger Reserve, but surprisingly camera trapping results of Wildlife Conservation Society-India Program revealed that the animal originated as far south as Bandipur Tiger Reserve. Nature’s ability to throw up surprises is unmatched. In a span of 15 months (or perhaps lesser) the animal had covered an aerial distance of 280 km, one of the longest ever movements recorded for wild tigers.

In March 2009 another young male tiger, which was initially photographed in Lakkavalli range of Bhadra, was discovered to have covered over 200 km before settling in Anshi National Park. Findings of these two dispersing male tigers gave us some insights into the secretive lives of these enigmatic cats. On the other side these long-range movements of tigers alerts and calls our attention about important issues. These animals are not just dispersing within the safe heavens of protected areas; neither are they dispersing only when there is intense competition within their natal areas. Though Bhadra is yet to reach its optimal tiger densities, animals are already moving out of this protected area. Or was this a stray incident which managed to escape all the conflicts it would face during these movements and safely landed in another protected area? These questions are complex and may remain unanswered.

Fractured landscapes

These findings highlight the importance to conserve certain forests in the Western Ghats that are currently outside the ambit of protected areas. These reserved forests together with plantations such as coffee that have shade, cover and some food availability, act as corridors for wildlife movement. Tiger populations in some of the protected areas act as sources and connecting these sources is central for the dispersal of these wandering tigers. This will also help in genetic exchange and positively contribute to demographics in wild tiger populations.

However these reserved forests have become the target of perpetual developmental activities. As clearly evident from these two incidents, our wildlife species need space, space that is wider and longer. The current fractured source populations need to be connected and linked through corridors. When I say connecting corridors I certainly do not mean human-engineered connectivity, we already possess naturally engineered connectivity. All we need to do is protect these identified critical areas especially from the current trend of unending infrastructure development.

There is a lot of debate on the anvil about the central Government proposed critical wildlife habitats. Legally these are areas to be classified within the existing protected areas based on documentation that human-wildlife co-existence is incompatible. A small geographic area of this country (~4%) is declared as protected areas and by default we need to consider these regions as critical wildlife habitats. Further we should have looked beyond protected area network and identified forests outside this complex for identifying critical wildlife habitats. This would ensure that incompatible development is kept away from these critical wildlife habitats but would still meet needs of local communities. Halting activities that permanently fracture habitats and stop wildlife movement should be of high importance.

Biology of wildlife should be the core of land use and development in critical wildlife habitats. Needs of animals that are large-bodied and wide-ranging such as tigers, elephants are critical components of this landscape planning. Animals do not migrate in a straight A-to-B line, but rather follow a complex route based on various factors which we are yet to be understood. Scientific studies takes decades to bring out results. Hence we need to apply precautionary principle and based on available informed understanding, thinking ahead of time would help.

Reversing the trend of habitat fragmentation that’s caused by mammoth infrastructure development is necessary. Eternal growth of highways, mines, power projects, railway lines in wildlife habitats especially outside the protected area system will literally halt these large vertebrates to move to new areas. Even tourism projects that do not consider wildlife as core of their business are creating pressure on the natural world. Commercial resorts, vacation homes near Bandipur, Bhadra, Dandeli and parts of Kodagu stand as classical examples in the way they are eating into patches of wildlife corridors.

Luckily we have a legal provision in the Environment Protection Act that can help protect us corridors. Urgent delineation and declaration of eco-sensitive areas around protected areas and in critical wildlife corridors can bring some restraint in slowing down the onslaught.

Karnataka’s gold standards

Karnataka is known to set gold standards in wildlife conservation which has been largely rewarded by some of the highest densities of tigers, elephants and other globally threatened and charismatic wildlife species found in the state. This needs to be continued to achieve similar results outside our protected area system. Karnataka has over 5,000 sq km of reserved forests that can help connect all the important protected areas. The state Forest Department has already set goals to achieve this praiseworthy task.

With political commitment, bureaucratic interest and appropriate landscape level planning this aim will be less herculean. If we do not change the way we are looking at infrastructure development we will possibly be spending billions in the future attempting to bring wildlife to areas which would have faced local extinction as it’s currently done in the western world.

This article was published in Deccan Herald on 10-06-2011

http://www.deccanherald.com/content/166848/wandering-tigers-fractured-landscapes.html