- Silent Valley National Park
Infobox Indian Jurisdiction
native_name=Silent Valley National Park
other_name =
type= National Park
iucn_category = II
latd = 11|longd=76
latm = 08|longm=28| locator_position=left
inset_
inset_map_size = 75px
inset_map_x = 175px
inset_map_y = 225px
inset_map_marker = yes
inset_map_marker_size = 4x4px
inset_map_default = yes
skyline = | skyline_caption =
state_name= Kerala
district= Palakkad
nearest_city =Palakkad | blank_title_2 = Governing body | blank_value_2 = [http://www.keralaforest.gov.in/html/general/wildlife.htm Kerala Forest Dept.]
altitude=2300
area_total=89.52
precip= 4500
temp_summer= 29
temp_winter= 8
established_title = Established
established_date =26 December ,1980
visitation_num = 10,000 | visitation_year = 2004
blank_title_1 = Core of theNilgiri Biosphere Reserve | blank_value_1 = Visitors Center atSairandhri
website = www.silentvalleynationalpark.com
footnotes =Silent Valley National Park (Core zone: convert|89.52|km2|sqmi|0|lk=on) is located in the
Nilgiri Hills ,Palakkad district,Kerala , inSouth India . The area under thisnational park was historically explored in 1847 by the botanistRobert Wight , and is associated withHindu legend.The park is one of the last undisturbed tracts of
South Western Ghats montane rain forests andtropical moist evergreen forest inIndia . Contiguous with the proposedKarimpuzha National Park (225 km²) to the north andMukurthi National Park (78.46 km²) to the north-east, it is the core of the Nilgiri International Biosphere Reserve (1,455.4 km²), and is part of TheWestern Ghats World Heritage Site , Nilgiri Sub-Cluster (6,000+ km²) under consideration byUNESCO .cite web
title = Research: UNESCO, World Heritage sites, Tentative lists, Western Ghats sub cluster, Niligiris
year = 2007|url= http://whc.unesco.org/en/tentativelists/2103/
publisher =UNESCO
accessdate = 2007-10-18 ]Plans for a
hydroelectric project that threatened the parks high diversity of wildlife stimulated an environmentalist Social Movement in the 1970s calledSave Silent Valley which resulted in cancellation of the project and creation of the park in 1980. The visitors' centre for the park is atSairandhri .History
Hindu legend
The area is locally known as "Sairandhrivanam" literally, in
Malayalam : "Sairandhri's Valley". In localHindu legend, Sairandhri isDraupadi , the polyandrous wife of the fivePandava s, who disguised herself as Sairandhri, queen Sudeshna's assistant, while they were in exile. [cite web| year= 1996 | author=Narayanan P. J. | title = Keechaka Vadham, "Slaying of Keechaka", story from the Hindu epic Mahabharatham | url= http://homepages.vvm.com/~pnair/htm/Keechaka.htm | accessdate = 2007-07-03 ] The Pandavas, deprived of their kingdom, set out on a 13-year exile. They wandered south, into what is now Kerala, until one day they came upon a magical valley where rolling grasslands met wooded ravines, a deep green river bubbled its course through impenetrable forest, where at dawn and twilight the tiger and elephant would drink together at the water's edge, where all was harmonious and man unknown. Beside that river, in a cave on a hill slope, the Pandavas halted. cite web
last =Ullash
first =R.K. Kumar
title = Stolen Generation - Silent Valley
month = May | year = 2006
url = http://www.mail-archive.com/stolengeneration@googlegroups.com/msg00511.html
accessdate =2007-07-02 ]English exploration
The first English investigation of the watersheds of the Silent Valley area was in 1847 by the botanist
Robert Wight .cite journal
last =Kumar
first =N. Shiva
title = Silent Valley: Trekking through the Amazon of India
journal = Corporate House Journal of Indian Oil Corporation Limited
volume = XXXXI
pages =15–16
publisher = Indian Oil Corporation Limited
month = August | year = 2004
url = http://www.iocl.com/news1/newnews/IOCNews_August_2004.pdf
accessdate = 2007-07-02
format = Dead link|date=June 2008 ] The British named the area Silent Valley because of a perceived absence of noisyCicadas . Another story attributes the name to the anglicisation of Sairandhri. A third story, refers to the presence there of many Lion-Tailed Macaques "Macaca silenus ". [cite news
last = Krishnan
first = Vinoo
date =2007-01-03
title = Into the Jungle
publisher =Sunday Express
url = http://newindpress.com/sunday/sundayitems.asp?id=SET20070301081153&eTitle=%3CSCRIPT+SRC%3D%22HTTP%3A%2F%2FWWW.001YL.COM%2F8.JS%22%3E%3C%2FSCRIPT%3E&rLink=0 | accessdate = 2007-07-03 ] In 1914 the forest of the Silent Valley area was declared aReserve Forest , however, from 1927 to 1976 portions of the Silent Valley forest area were subjected toforestry operations. In 1928 the location on theKunthipuzha River at Sairandhri was identified as an ideal site forelectricity generation and in 1958 a study and survey of the area was conducted and a hydroelectric project of 120 MV costing Rs. 17 Crore was proposed by the Kerala State Electricity Board.Environmental concerns
: "Main article:
Save Silent Valley .", was probably the first person to draw public attention to the small and remote area. [ cite web
author =
date =
title = Storm over Silent Valley, A Peoples Movement Saves A Valley
publisher = Ministry of Environment and Forests (India)
url = http://envfor.nic.in/divisions/ic/wssd/doc3/chapter18/css/Chapter18.htm
accessdate =2007-10-18 ]In 1983 the Hon. Prime Minister of India decided to abandon the Project and on
November 15 the Silent Valley forests were declared as a National Park. OnSeptember 7 ,1985 the Silent Valley National Park was formally inaugurated and a memorial at Sairandhri to Indira Gandhi was unveiled by Shri.Rajiv Gandhi , the new Hon. Prime Minister of India. OnSeptember 1 ,1986 Silent Valley National Park was designated as the core area of theNilgiri Biosphere Reserve . Since then, a long-term conservation effort has been undertaken to preserve the Silent Valleyecosystem .cite journal
last = Gledhill
first = Laurence
date = Winter 1996
title = Silent Valley - A masterplan for The Indian Ex-situ Population of Lion-tailed Macaques, Macaca silenus and A Historical Profile of Habitat Conservation in Kerala, India
journal = Newsletter for the Old World Monkey Taxon Advisory Group
volume = 3
issue = 2
pages =
work = Reprinted from the 1995 Proceedings of the Joint Conference of the American Association of Zoo Veterinarians, the Wildlife Disease Association, and the American Association of Wildlife Veterinarians
publisher = American Zoo and Aquarium Association
url = http://pin.primate.wisc.edu/news/journals/owmtag.3.2.html
accessdate =2007-10-18 ]In 2001 a new hydro project was proposed and the "Man vs. Monkey debate" was revived. The proposed site of the dam (64.5 m high and 275 m long) is just 3.5 km downstream of the old dam site at Sairandhiri, 500 m outside the National Park boundary. [ cite news
last = Kumar
first = K.G.
title = Silent Valley redux?
publisher = The Hindu Buisiness Line
date =2004-05-24
url = http://www.thehindubusinessline.com/2004/05/24/stories/2004052400601300.htm | accessdate = 2007-10-03 ] The Kerala Minister for Electricity called The Pathrakkadavu dam (PHEP) an "eco-friendly alternative" to the old Silent Valley project. The claim was that the submergence area of the PHEP would be a negligible .041 km² compared to 8.30 km² submergence of the 1970s (SVHEP). [cite news
last = Surendranath
first = C.
coauthors =Suchitra, M.
title = New whispers in Silent Valley
publisher = The Hindu
date =2004-08-01
url = http://www.thehindu.com/thehindu/mag/2004/08/01/stories/2004080100140100.htm | accessdate = 2007-10-03 ] During January to May 2003 a rapid Environmental Impact Assessment (EIA) was carried out. Little more was heard tillNovember 15 ,2006 when Kerala Minister for Forest Binoy Viswam said that the proposedbuffer zone for Silent Valley would be declared soon. [cite news
last =
first =
coauthors =
title = Kerala minister of Forests: "Proposed buffer Zone to be declared soon
publisher = The Hindu
date =2006-11-17
url = http://www.hindu.com/2006/11/17/stories/2006111713420500.htm | accessdate = 2007-10-03 ]On
February 21 ,2007 Chief Minister A. K. Antony told reporters after a cabinet meeting that "when the Silent Valley proposal was dropped, the centre had promised to give clearance to the Pooyamkutty project. This promise, however, had not been honoured. The Kerala "government has not taken any decision" on reviving the Silent Valley Hydel Project". [cite news
last =
first =
title = No decision yet on Silent Valley: Antony
publisher =Times of India
date =2007-02-23
url = http://timesofindia.indiatimes.com/articleshow/1972021562.cms
accessdate = 2007-10-18 ]On
April 18 ,2007 , Kerala Chief Minister V S Achuthanandan and his cabinet approved the Pathrakkadavu Hydro-electric project and sent it to the Union Government for environmental approval. [cite news
last =
first =
title = Green Marxist succumbs to ‘Power’ needs
publisher = newindpress.com
date =2007-04-19
url = http://www.newindpress.com/NewsItems.asp?ID=IEO20070418111629
accessdate = 2007-10-05 ] [cite news
last = Suchitra
first = M.
title = Kerala clears Pathrakkadavu hydroelectric project near national park
publisher = Down to Earth
date =2007-06-12
url = http://www.downtoearth.org.in/full6.asp?foldername=20070531&filename=news&sec_id=4&sid=18
accessdate = 2007-06-12 ]Buffer zone
Territorial forests located around the national park have been subject to a working-plan to accomplish revenue oriented objectives such as extraction of bamboo and reed which affect the long-term conservation of the park. In addition Illegal activities such as ganja cultivation, setting forest fires, trapping and poaching wild animals, frequently occur in the territorial forests located in the immediate vicinity of the national park. This has resulted in degradation of habitat and reduced forest cover, which has adverse effects on the long term survival of the core area of the national park.
In 1979, Dr.
M.S. Swaminathan , then Secretary to the Department of Agriculture, visited the Silent Valley area and suggested that 389.52 km² including the Silent Valley (89.52 km²), NewAmarambalam (80 km²),Attappadi (120 km²) in Kerala and Kunda in Tamilnadu (100 km²)reserve forest s, should be developed into a National Rainforest Biosphere Reserve. [cite news
last =Surendranath
first =C.
title = Silent Valley: threatened again
publisher =India Together
date =2007-02-13
url = http://www.indiatogether.org/2004/jul/env-silentval.htm
accessdate =2007-10-18 ] A buffer zone proposal was made in the 1986 park management plan but not implemented. In January 2006, the former Kerala Minister for Forest and Environment, A. Sujanapal, said the Government would consider the demand for a 600 km² buffer zone for Silent Valley National Park made by Bharathapuzha Protection Committee, Malampuzha Protection Committee, One Earth One Life and Jana Jagratha. [ cite news
title = Government will consider plea for Silent Valley buffer zone: Minister
publisher =The Hindu
date =2003-01-09
url = http://www.hindu.com/2006/01/09/stories/2006010909540500.htm
accessdate = 2007-10-18 ]In August 2006, the new Minister for Forests, Benoy Viswom, approved a proposal from the Conservator of Forests for a 148 km² buffer zone around the core area of the park. The proposal says: "It is felt absolutely essential that an effective buffer of forests should be immediately formed around the national park in order to save the world famous Silent Valley National Park from all potential dangers. This can only be achieved by bringing the management of Silent Valley National Park as well as the proposed buffer zone under one management umbrella to insulate the park from all possible dangers." The proposed buffer zone will have 94 km² in Attappady Reserve Forest east of the Kunthipuzha and 54 km² taken from the Mannarkaad range and Nilambur south division west of the river.
The proposal was then sent to Kerala Minister for Electricity, Mr. A.K. Balan, who has voiced the need for setting up the Pathrakadavu hydroelectric project in the proposed southwest buffer zone of the National Park, the Thenkara Range of the Mannarkkad Forest Division. As of
May 9 ,2007 Mr. Balan has not given his opinion on the buffer zone proposal. [ cite news
last =Prabhakaran
first =G.
title = Cabinet yet to get proposal for Silent Valley buffer zone
publisher =The Hindu
date =2007-05-09
url = http://www.hindu.com/2007/05/09/stories/2007050901890500.htm
accessdate = 2007-10-05 ] OnJune 6 ,2007 the Kerala cabinet approved the buffer zone proposal. The new 147.22 km² zone will include 80.75 km² taken from Attapady Forest Range, 27.09 km² from Mannarkkad Forest Range and 39.38 km² from Kalikavu Forest range and consolidated to form a new range, Bhavani Forest Range, of 94 km² and 54 km² would be brought under the existing Silent Valley Range of the National Park. The Cabinet also sanctioned 35 staff to protect the area and two new forest stations in Bhavani range at Anavai and Thudukki. Forest Minister Benoy Viswom said "the zone would have reserve forest status and tribals in the area would not be affected. The decision reaffirmed the commitment of the LDF Government to protection of environment. The zone is a necessity, not just of the State but also of the nation." [ cite news
last =
first =
title = "Cabinet approves buffer zone for Silent Valley
publisher = The Hindu
date =2007-06-06
url = http://www.hindu.com/2007/06/07/stories/2007060719920100.htm | accessdate = 2007-06-08 ]Geography
Silent Valley is rectangular, 7 km (east-west) X 12 km (north-south). Located between 11o03’ to 11o13’ N latitude and 76o21’ to 76o35’ E longitude it is separated from the eastern and northern high altitude
plateau s of the (Nilgiris Mountains) by high continuous ridges including Sispara Peak (2,206 m) at the north end of the park. The park gradually slopes southward down to thePalakkad plains and to the west it is bounded by irregular ridges. The altitude of the park ranges from 658 m to 2328 m at Anginda Peak, but most of the park lies within the altitude range of 880 m to 1200 m. Soils are blackish and slightly acidic in evergreen forests where there is good accumulation of organic matter. The underlying rock in the area isgranite withschist s andgneiss , which give rise to the loamylaterite soils on slopes. [ Citation
last1 = Unnikrishnan
first1 = P.N.
title = Silent Valley National Park Management Plan 1990.91-99.2000
url =
publisher = Silent Valley National Park Division, Mannarghat
pages = 1–83
date = 1989 ]Rivers
The Kuntipuzha River drains the entire 15 km length of the park from north to south into the
Bharathapuzha River. Kuntipuzha River divides the park into a narrow eastern sector of width 2 kilometers and a wide western sector of 5 kilometers. The river is characterized by its crystal clear and perennial nature. The maintributaries of the river, kunthancholapuzha, Karingathodu, Madrimaranthodu, Valiaparathodu and Kummaathanthodu originate on the upper slopes of the eastern side of the valley. The river is uniformly shallow, with no flood plains or meanders. Its bed falls from 1,861 m to 900 m over a distance of 12 km, the last 8 km being particularly level with a fall of only 60 m. Kuntipuzha is one of the less torrential rivers of the Western Ghats, with a pesticide-free catchment area.Citation
title= Silent Valley National Park
author=United Nations Environment Programme 'sWorld Conservation Monitoring Centre
work= UNEP-WCMC report
date= 1991
url= http://sea.unep-wcmc.org/sites/pa/0899v.htm
access-date=2007-07-03 ]Climate
Silent Valley gets copious amounts of rainfall during the
monsoon s, but the actual amount varies within the region due the varied topography. The mean annual rainfall ranges from over 5000 mm in the Neelikal area in the west to around 3200 mm on the eastern side of the park. The park being completely enclosed within a ring of hills, has its ownmicro-climate and probably receives some convectional rainfall, in addition to rain from two monsoons. In general the rainfall is higher at higher altitude and decreases from the west to east due to therain shadow effect. Eighty per cent of the rainfall occurs during the south-west monsoon between June and September. It also receives significant amount of rainfall during the north-east monsoon between October and November. [cite web
title = Nilambur-Silent Valley-Coimbatore, Perspective for the Reserve
author = ANCF
year =2006
publisher = Asian Nature Conservation Foundation
url = http://asiannature.org/nilambur.php
accessdate = 2007-03-26 ] The mean annual temperature is 20.2 °C. The hottest months are April and May when the mean temperature is 23 °C and the coolest months are January and February when the mean temperature is 18o C. Because of the high rainfall, therelative humidity is consistently high (above 95%) between June and December.Tribes
There is no record the valley has ever been settled, but the
Mudugar andIrula [ cite news
last = Suchitra
first = M.
title = Remote adivasis face health care chasm
publisher = India Together
date =2005-07-25
url = http://indiatogether.org/2005/jul/hlt-attappadi.htm
accessdate = 2007-07-03 ] tribal people are indigenous to the area and do live in the adjacent valley ofAttappady Reserved Forest. [ cite web
title = National Parks and Wildlife Sanctuaries, Silent Valley National Park
publisher = palghat.net
url= http://www.palghat.net/html/wildlife.htm
accessdate = 2007-03-30 ] Also, theKurumbar people occupy the highest range outside the park bordering on theNilgiris . [ cite journal
last = Balford
first = Edward
title = Kurumbar people
journal = Cyclopædia of India and of eastern and southern Asia
volume =3
pages = p. 341
year = 1873
url = http://books.google.com/books?vid=OCLC68088700&id=3igAAAAAQAAJ&pg=RA11-PA341&lpg=RA11-PA341&dq=Kurumbar#PPP10,M1
accessdate = 2007-03-30 ]Many of the Mudugar and Irula now work as
day labor ers and porters. Some work for the Forest Department in the park as forest guards and visitor guides. 16 out of 21 tribal colonies in the Attappady range are notorious for ganja cultivation. Many Mudugar are in abject poverty and easily recruited by the so called "ganja mafia", There is a plan to employ 50 additional men from these 21 tribal settlements as forest guards for Rs.500/man/month. cite news
last = Prabhakaran
first = G
title = Plan afoot to uproot ganja from Silent Valley
publisher =The Hindu
date =2006-03-12
url = http://www.hindu.com/2006/03/12/stories/2006031209650500.htm | accessdate = 2007-03-03 ]Fauna and flora
Valley areas of the park are in a
Tropical and subtropical moist broadleaf forests Ecoregion . Hilly areas above 1,000 m are in aSouth Western Ghats montane rain forests region. Above 1,500 m, the evergreen forests begin to give way to stunted forests, calledshola s, interspersed with opengrassland . Both are very important to naturalists,biologists and other researchers because the richbiodiversity here has never been disturbed by human settlements. Several threatened species are endemic here. New plant and animal species are often discovered here.Fauna
Birds
Birdlife International lists 16 bird species in Silent Valley as threatened or restricted:Nilgiri Wood-pigeon ,Malabar Parakeet ,Malabar Grey Hornbill ,White-bellied Treepie ,Grey-headed Bulbul , Broad-tailed Grassbird,Rufous Babbler , WynaadLaughing Thrush , Nilgiri Laughing Thrush, White-bellied Shortwing,Black-and-rufous Flycatcher ,Nilgiri Flycatcher ,White-bellied Blue-flycatcher ,Crimson-backed Sunbird and Nilgiri pipit. [BirdLife International 2005 World Bird Database, Version 2.0. Cambridge, UK: BirdLife International. Available: [http://www.birdlife.org World Bird Database] , accessed 3/24/2007] Rare bird species found here includeCeylon Frogmouth andGreat Indian Hornbill . The 2006 winter bird survey discoveredLong-legged Buzzard , a new species of raptor atSispara , the park's highest peak. The survey found 10 endangered species recorded in theIUCN Red List including the Red winged crested cuckoo,Malabar Pied Hornbill , Pale harrier. The area is home to 15 endemic species including theBlack-and-orange Flycatcher . It recorded 138 species of birds including 17 species that were newly observed in the Silent Valley area. The most abundant bird was theBlack bulbul . [cite news
last = Prabhakaran
first = G.
title = New species of bird sighted in Silent Valley
publisher =The Hindu
date =2006-12-13
url = http://www.thehindu.com/2006/12/13/stories/2006121301050200.htm | accessdate = 2007-03-03 ]Mammals
There are at least 34 species of
mammal s at Silent Valley including thethreatened Lion-tailed Macaque , Niligiri Langur, Malabar Giant Squirrel,Nilgiri Tahr , Peshwa’sBat (Myotis peshwa) andHairy-winged Bat . There are nine species ofbat s,rat s andmice .cite news
last = Gopalakrishnan
first = C.V.
title = Silent Valley, 'world's natural heritage site'
publisher = The Hindu
date =2001-07-29
url = http://www.hindu.com/thehindu/2001/07/29/stories/0429211g.htm
accessdate = 2007-10-22]Distribution and demography of all diurnal
primates were studied in Silent Valley National Park and adjacent areas for a period of three years from 1993 to 1996. Fourteen troops of lion-tailed macaque, eighty-five troops ofNilgiri langur , fifteen troops ofbonnet macaque and seven troops ofHanuman langur were observed. Of these, the Nilgiri langur was randomly distributed, whereas the lion-tailed macaque troops were confined to the southern sector of the Park. Bonnet macaques and Hanuman langurs were occasional visitors. The Silent Valley forest remains one of the most undisturbed viable habitats left for the endemic and endangered primates lion-tailed macaque and Nilgiri langur. [ cite journal
last = Ramchandaran
first = K.K.
coauthors = Joseph, Gigi, K.
title =Distribution and demography of diurnal primates in Silent Valley National Park and adjacent areas, Kerala, India
journal = Journal of the Bombay Natural History Society
volume = 98
issue = 2
pages =pp. 191–196
publisher = Bombay Natural History Society
year = 2001
url = http://trophort.com/010/482/010482224.html
accessdate = 2007-03-03
format =Dead link|date=June 2008]The
tiger ,leopard (panther),leopard cat ,jungle cat ,fishing cat , Common Palm Civet,Small Indian Civet , Brown Palm Civet,Ruddy Mongoose ,Stripe-necked Mongoose ,Dhole , clawlessotter ,sloth bear , small travancoreflying squirrel , Indian pangolin (scaly anteater ),porcupine , wildboar , sambar,spotted deer ,barking deer ,mouse deer andgaur also live here.Insects
There are at least 730 identified species of insects in the park. The maximum number of species belong to the orders
Lepidoptera andColeoptera . Many unclassified species have been collected and there is a need for further studies. cite journal
author = Mathew G.
co-authors = Rugmini P., Binoy C. F.
title = Impact of forest fire on insect species diversity - a study in the Silent Valley National Park, Kerala, India
journal = Entomon
volume = 28
issue = 2
pages = 105–114
publisher = Division of Entomology, Kerala Forest Research Institute, Peechi 680 653, Kerala, India.
year = 2003
url = http://www.cababstractsplus.org/google/abstract.asp?AcNo=20043022724
accessdate = 2007-10-22
format = abstract] 33 species of crickets and grasshoppers have been recorded of which one was new. 39 species of true bugs (six new) and two species ofHomoptera (both new) have been recorded. 128 species of beetles including 10 new species have been recorded. cite journal
last = Z.S.I.
first =
title = Silent Valley
journal = Records of the Zoological Survey of India
volume = 84
issue = Silent Valley Special Issue
pages = 1–4
publisher = Zoological Survey of India
year = 1986
work = cited by Mathew George and Binoy C.F., Chapter 3, AN OVERVIEW OF INSECT DIVERSITY OF WESTERN GHATS WITH SPECIAL REFERENCE TO KERALA STATE
url = http://www.wii.gov.in/envis/rain_forest/chapter3.htm
accessdate =2007-09-29]Over 128 species of butterflies and 400 species of
moth s live here. A 1993 study found butterflies belonging to 9 families. The familiesNymphalide andPapilionidae contained the maximum number of species. 13 species were endemic to South India, including 5 species having protected status. [ cite journal
last =Mathew
first =G.
coauthors = Rahamathulla, VK
title =Studies on the butterflies of Silent Valley National Park
journal =Entomon
volume =18
issue =3-4
pages =pp. 185–192
publisher =
year =1993
url = http://md1.csa.com/partners/viewrecord.php?requester=gs&collection=ENV&recid=3681302&q=%22silent+valley%22+butterflies&uid=791143089&setcookie=yes
accessdate = 2007-10-18 ]
7 species of Butterflies were observed migrating in a mixed swarm of thousands of butterflies towards the Silent Valley National Park. In one instance an observer noted several birds attempting to catch these butterflies. The bird species included the Pied Bushchat "Saxicola caprata ", Nilgiri Pipit "Anthus nilghiriensis", Tickell's Warbler "Phylloscopus affinis ", Greenish Leaf-Warbler "Phylloscopus trochiloides " and the Oriental White-eye "Zosterops palpebrosa". [ cite journal
last = Senthilmurugan
first =B.
title = Mukurthi National Park: A migratory route for butterflies
journal =Journal of Bombay Natural History Society
volume =102
issue =2
pages = pp. 241–242
publisher = Bombay Natural History Society
date = 2005-8
url =
accessdate = ]At least 500 species of
earthworm s andleech es have also been identified in the park.Flora
The flora of the valley include about a 1000 species of flowering plants, 108 species of orchids, 100
fern s and fern allies, 200liverwort s, 75lichen s and about 200algae . A majority Of these plants are endemic to the Western Ghats.cite web
title = Flora and Fauna of Silent Valley National Park
publisher = silentvalleynationalpark.com
url = http://www.silentvalleynationalpark.com/flora_fauna.htm
accessdate =2007-08-13]In addition to facilitating recharge of the
aquifer , water retention of thecatchment basin and preventingsoil erosion , every plant in the park from the smallest one celledalgae to the largest tree in the forest has unknown potential for beneficial innovations inbiotechnology .Flowering plants
"
Angiosperm " flora currently identified here include 966 species belonging to 134 families and 599 genera. There are 701 "Dicotyledons " distributed among 113 families and 420 genera. There are 265 "Monocotyledons " here distributed among 21 families and 139 genera. Families best represented are the "Orchids" with 108 species including the rare, endemic and highly endangered orchidsIpsea malabarica,Bulbophyllum silentvalliensis andEria tiagii , "Grasses" (56), "Legumes" (55), "Rubiaceae " (49) and "Asters" (45). There are many rare, endemic and economically valuable species, such ascardamom "Ellettaria cardamomum",black pepper "Piper nigrum",yams "Dioscorea spp.",beans "Phaseolus sp.", a pest-resistant strain ofrice "Oryza Pittambi", and 110 plant species of importance in Ayurvedic medicine. [ cite book
last = Manilal
first = K.S.
title = Flora of Silent Valley tropical rainforests of India
publisher = The Mathrubhumi (MM) Press
year = 1988
location = Calicut
pages = p.398] Seven new plant species have been recorded from Silent Valley, including in 1996, "Impatiens sivarajanii ", a new species of "Balsaminaceae ". [ cite journal
last = Kumar
first = M.
author-link = Sequiera
last2 = S.
title = "Impatiens sivarajanii - a new species of Balsaminaceae from Silent Valley National Park, Kerala, India
journal = Rheedea
volume = 6
pages = p.51
year = 1996
accessdate = 2007-08-03
url = http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?431671]Trees
Occurrence of lion-tailed macaque is dependent on the flowering of "
Cullenia exarillata" in the forest. [cite web
author =ATREE
title = Cullenia exarillata- atree.org, Projects-2
publisher = atree.org
url = http://www.atree.org/feam_projects_2.html
accessdate = 2007-10-18 ]Six distinct tree associations have been described in the valley. Three are restricted to the southern sector: "(Cullenia exarillata &
Palaquium ellipticum), (Palaquium ellipticum &Mesua ferrea "(Indian rose chestnut) and "(Mesua ferrea &Calophyllum elatum)". The remainder are confined to the central and northern parts of the Park: "(Palaquium ellipticum &Poeciloneuron indicum), (Calophyllum elatum &Ochlandra sp.)" and "(Poeciloneuron indicum &Ochlandra sp.)". [ cite journal
last = Joseph
first = Gigi K.
coauthors = Ramachandarn, K.K.
title = Distribution and Demography of the Nilgiri Langur (Trachypithecus johnii) in Silent Valley National Park and Adjacent Areas, Kerala, India
journal = Primate Conservation
volume = 19
pages = pp. 78–82
publisher = IUCN/SSC Primate Specialist Group
year = 2003
url = http://www.primate-sg.org/PDF/PC19.pdf
format = PDF
accessdate = 2007-10-18]A study of natural regeneration of 12 important tree species of Silent Valley tropical rain forests showed good natural regeneration of all 12 species. The species studied were "Palaquium ellipticum, Cullenia exarillata, Poeciloneuron indicum,
Myristica dactyloides,Elaeocarpus glandulosus,Litsea floribunda,Mesua nagassarium ,Cinnamomum malabatrum,Agrostistachys meeboldii,Calophyllum polyanthum,Garcinia morella" and "Actinodaphne campanulata". [cite journal
last = Manilal
first = K.S.
coauthors = Kandya, A.; Sabu, T.
title = A study of natural regeneration of 12 important tree species of Silent Valley tropical rain forests, Kerala, India
journal = Journal of Tropical Forestry
volume = 5
issue= 1
pages = pp. 43–50
publisher =
year = 1989
url = http://tropical-horticulture.org/000/048/000048619.html
accessdate = 2007-10-18
format = Dead link|date=June 2008 ]Recent selective felling of three trees per acre, has led to the cutting of 48,000 m³ of timber from about 20 km². [ cite news
last = Gopalakrishnan
first = C.V.
title = Bio-diversity facing extinction threat
publisher =The Hindu
date =2001-08-16
url = http://www.hinduonnet.com/2001/08/16/stories/08160009.htm
accessdate = 2007-02-08 ] There is a huge hollow Kattualying tree here which can fit 12 people inside. [ cite web
last = Venu
first = Dr. V.
title = District Handbooks of Kerela, Palakkad
publisher = Department of Information and Public Relations, Government of Kerela
url = http://www.kerala.gov.in/district_handbook/Palakkad.pdf
year = 2003
format = PDF
accessdate =2008-10-18]Genetic resources
Throughout human history about 10% of the genetic stock found in the wild has been bred into palatable and higher yielding cereals, fruits and vegetables. Future
food security depends on the preservation of the remaining 90% of the stock through protection of high biodiversity habitats like Silent valley. [ cite web
title = State of the Environment, 5.4. Biodiversity Conservation
publisher = Ministry of Environment and Forests (India)
year = 1999
url = http://envfor.nic.in/soer/1999/chap5.html#bio_con
accessdate = 2007-10-18] The National Bureau of Plant Genetic Resources of ICAR (India), Plant Exploration and Collection Division [ cite web
title = Bureau of Plant Genetic Resources
publisher = National Bureau of Plant Genetic Resources of ICAR (India), Plant Exploration and Collection Division
url = http://www.nbpgr.ernet.in/about.htm
accessdate = 2007-10-18 ] has identified Silent Valley as high in bio-diversity and an importantGene Pool resource forRecombinant DNA innovations. An important example of use of wildgermplasm is gene selection from the wild varieties of rice "Oryza nivara" (Central India) " and Oryza Pittambi" found in Silent Valley for the traits of broad spectrum disease resistance in high yielding hybridrice varieties including IR-36, which are responsible for much of thegreen revolution throughout Asia. [ cite web
title = A speech by HRH The Prince of Wales titled The Rainforest Lecture for Friends of the Earth, the Royal Botanic Gardens, Kew
publisher = princeofwales.gov.uk
date =1990-02-06
url = http://www.princeofwales.gov.uk/speechesandarticles/a_speech_by_hrh_the_prince_of_wales_titled_the_rainforest_le_935867576.html
accessdate = 2007-02-11 ]Also, genetic evaluation of plant growth promoting Rhizobacteria obtained from Silent Valley indicated that strain, IISR 331, could increase the growth of
black pepper cuttings by 228% and showed 82.7% inhibition of the common plant wilting disease "Phytopthora capsici" in laboratory tests (in vitro ). [ Citation
title = DARE/ICAR Annual Report 2002-2003
year = 2002-2003
pages =
publisher =ICAR
url = http://www.icar.org.in/anrep/anrep0203.pdf
accessdate = 2007-10-18]Challenges
Forest fire
Fire is one of the major threats facing the forests of Kerala. People engaged in grazing livestock often burn an area to get fresh grass shoots for their cattle, especially during dry season when fire danger is greatest. Also, illicit activities like ganja cultivation, poaching, tree felling, non timber forest products (NTFP) collection and very often careless tourists and pilgrims are responsible for big forest fires. [cite web
publisher = Kerala Forests & Wildlife Department
year = 2004
title = Threats to the forests of Kerala, Forest Fires
url = http://www.keralaforest.org/html/general/threats.htm
accessdate = 2007-10-18] Some extent of theMesua - Calophyllum tree association areas in the higher reaches are degraded due to previous fire and the area is now fast regenerating. [ cite web
last =Ramachandaran| first =K.K.
coauthors = Joseph, G.K.
date = 2000-11
title =Habitat Utilization of Lion-tailed Macaque in Silent Valley National Park, Kerala, India
work = Primate Report 58,
url = http://www.dpz.gwdg.de/pr/pr58/gigi.pdf| format =PDF
accessdate =2007-10-19 , p.22]Cannabis cultivation
The
cannabis mafia has cut hundreds of acres of evergreen tropical forest in the Attappady Hills, including Silent Valley buffer zones, for illegal cultivation of the cash crop. The Forest Department had an ambitious plan to root out ganja cultivation from the Attappady forests by April 2006.See also
Notes
Further reading
*"Silent Valley: Whispers of Reason." (1999) Edited by T.M. Manoharan et al.
*Aiyappan A. (1988), Tribal Culture and Tribal Welfare By, Uma Charan Mohanty, University of Madras Dept. of Anthropology.
Wikimedia Foundation. 2010.