Showing posts with label encroachment. Show all posts
Showing posts with label encroachment. Show all posts

Friday, 29 July 2011

The fine line

Animal-human skirmishes are recurrent occurrences, typically at forest-settlement boundaries. Such examples abound in the forested, mountainous Western Ghats, where the humans have (legally and illegally) established their dwellings and agricultural fields virtually on the doorsteps of the forest inhabitants. Such conflict can be mainly classified into two:

-When humans encroach (mostly unlawfully) into their territories to collect firewood or forest products (including illegal felling of trees and hunting of deer and rabbits).

-When wild animals stray into the settlements and agricultural lands, usually during times of drought when the streams dry up. In the case of Ponmudi, the Kallar river becomes the focus of such skirmishes: the areas bordering the perennial (but relatively shallow) river continue to be fringed with foliage and both parties wage their battle over the resources. This is further aggravated by humans who illegally harvest wild grasses and reeds (Ochlandra travancorica) during the fair weather. This deficiency and destruction of habitat shifts the animal population towards the fertile agricultural lands with consequences such as attacks by gaurs (Bos gaurus), elephants harvesting plantain and coconut trees, wild boars utilising the cultivated tubers, and bears searching for anything edible. It is not uncommon for deer to end up in cooking pots, resulting in leopards retaliating by feasting on goats, calves, and dogs (!). Similarly, jackals target chickens and there are cases of attacks by tigers too.

In the case of urban wildlife, the boundaries become vaguer. Our family home is located in an area supposed to have been a forest around 150-200 years ago (presumably until a manor was constructed for the Chief Secretary of the government). Since then, it has been transformed into a sector of houses (both old and new), most having limited grounds (those which do have what is termed ‘well-maintained’ grounds, i.e. backyards devoid of trees).

In this instance, I cannot state that humans have ejected the resident wildlife out of their territories- such an event would have happened quite a while ago. The area is still frequented by numerous local and migratory bird species, including kingfishers (who were very fond of our outdoor fish ponds), crow pheasants, kites, kestrels, pigeons, cranes, and herons, as well as palm civet (Paradoxurus hermaphroditus), mongoose (Herpestidae), squirrels, and bats (to name a few). But such peaceful coexistence is not the norm. A neighbour has made the full use of urban wildlife by laying traps for civet cats and mongoose, both of which end up either in his cooking pan or sold for high prices to vendors of quack medicines (civet cat meat is supposedly a cure for asthma).


Snakes tend to reach deplorable ends, regardless of their nature (poisonous or non-poisonous). Even the rat snake (considered to be auspicious) suffers a terrible plight due to mistaken identity. In our grounds, we’ve had kraits (Bungarus coeruleus) and vipers, apart from a regular ‘visitor’ of nearly four decades- a 6-foot hefty cobra (Naja naja). But recently, after being burdened by just too many reports of snakes nesting in an aged clump of golden palm trees in our front garden (next to our verandah), the parents uprooted the thicket and found, to their surprise, a huge nest of vipers. This brings one to the question- where does one draw the line?

Mongoose caught in the trap of our neighbour

Wednesday, 6 October 2010

Sasthamkotta Lake and its struggle for existence

Around 29 kms away from the city of Quilon/Kollam is Sasthamkotta Lake- the largest freshwater lake in Kerala which is, since November 2002, one among 25 sites in India designated as a wetland of international importance under the Ramsar Convention. The lake has a surface area of 373 ha and an average depth of 6.53 m (the maximum depth being 15.2 m). Since no tributaries feed the lake, it is believed that its existence is owed to rainfall as well as the springs at the bottom of the lake which supposedly stem from the nearby Kallada river.

The lake, with its pH of 7.25, serves as a major drinking water source for the inhabitants of the Kollam district. And the large population of chaoborus larvae (glassworm)* is believed to consume bacteria in the lake, thus maintaining the water’s purity. The aquatic fauna includes Etroplus suratensis (Pearl Spot or ‘karimeen’) and catfish. It is also a favourite habitat of the Common Teal (Anas crecca). Of special importance are Puntius ticto punctatus (the critically endangered Ticto barb), Horabagrus brachysoma (the endangered sun catfish), and Parambassis thomassi (vulnerable), as reported by WWF. WWF’s report also states that lake lacks aquatic flora and has scarce phytoplanktons**- claims which cannot be generalised for botanists have collected flora such as Nymphea, Limnanthemum, Lemna, Elodea, and Hydrilla from the lake.

The lake has been in the limelight recently- its environmental quality has been deteriorating, and both its surface area and the water level has been decreasing (in May 2010, 24 hectares of the lake was parched). The reasons are:
- Encroachment/reclamation for agriculture (mainly paddy, plantain, and tapioca)
- Unauthorised sand mining, including clay and sand mining in the surrounding hillocks which serves as catchments
- Soil erosion on the banks (the acacia trees which were planted with the purpose of stopping erosion have also stayed true to their reputation as water depleters).
-Dumping of agricultural and domestic wastes
- Dumping of wastes by restaurants and butchers
- Dumping of domestic/municipality sewage via gutters
- Soaking of dry coconut palm fronds before weaving
- The usual norm of local residents bathing and washing clothes (also cattle) in the lake.
- Accumulated eroded material at the bottom of the lake.

There may be some solution after all. The local government drew up a master plan for protecting the lake, and July 2010 saw those who lived around the lake being given a notice banning them from taking baths, washing clothes, or dumping waste into the lake. The notice also forbids mining in the catchments. In September, Sasthamcotta Lake and its surrounding catchments areas were declared as protected. Quarrying, sand-mining, and other activities which pollute the lake have been banned for two months. A longer term ban would have been more appropriate- a two month ban cannot achieve anything substantial, if any.

Postscript:
Whilst researching this topic, it was evident that the primary source used by most reports/articles was the Information Sheet on Ramsar Wetlands filed in by WWF, which may have a degree of inaccuracy.

* The WWF report’s ‘cavaborus larvae’ is probably a typo (or an ignorant error). Nonetheless, there are now 122 google results for the same term associated with the lake.

** A lake with no plants, minimal phytoplankton, and many fish species? Shurely shome mishtake?

References:
Information Sheet on Ramsar Wetlands(RIS)
The Annotated Ramsar List: India
WWF on Sasthamkotta Lake

http://www.hindu.com/2010/09/11/stories/2010091153010500.htm
http://beta.thehindu.com/news/states/kerala/article429986.ece
http://timesofindia.indiatimes.com/india/11-more-wetlands-in-Ramsar-list/articleshow/32390259.cms

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