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DISTRIBUTION & SEASONAL SURVEY OF AQUATIC SURVEY OF AQUATIC

ANGIOSPERMS IN CHIKKA BIDIRU LAKE OF

BANNERGHATTA, BANGALORE DISTRICT, KARNATAKA STATE

Dr. V. K. HARIDASAN &

Mr. G. RAVI

The present paper is a database of taxonomic account of aquatici id tifi d f th h bit t f Chikk Bidi l k fangiosperms identified from the habitat of Chikka Bidiru lake of

Bannerghatta, Begihalli village, Bangalore district, Karnatakastate which is about 2‐3 km travel enroute the Sarala BirlaAcademy on Bannerghata‐Jigani road The study was undertakenAcademy on Bannerghata‐Jigani road. The study was undertakento make a regular seasonal survey of the distribution of aquaticangiosperms and to assess any change in their availability.

METHODOLOGYThe Chikka Bidiru lake was surveyed twice a year, viz., April – June and November – January from 2004 ‐2008. The plants were collected in two parts of which one set The plants were collected in two parts of which one set was utilised for the preparation of herbarium and the other was used to grow in artificial conditions. For the ggrowth of plants, large plastic tubs were used and even the soil samples were collected from the area of study t f ilit t d t ti d t b tt to facilitate an easy adaptation and to ensure better survival.

YLITERATURE SURVEY

The literature survey of various floras does not provide any record of plants from Chikka Bidiru lake. Rather it provides a database of various lakes and other water provides a database of various lakes and other water bodies in and around Bannerghatta of Bangalore district. The study reveals an occurrence of 27 yfamilies and 62 species of plants which include aquatic angiosperms ( submerged, floating and

ti ll b d & fl ti ) hibi d partially submerged & floating), amphibious and plants on the banks and shores of the lakes.

Nymphoides indica (L.) O. Kuntze

Utricularia gibba L.subsp.exoleta (R.Br.)P.Taylor

Alternanthera philoxeroides (Mart.) Griseb.

Beating the summer heat in the pristine water

CHIKKA BIDIRU LAKE FROM A LONG SHOT

DATABASE OF SEASONAL SURVEY AND DISTRIBUTION OF AQUATIC ANGIOSPERMS AT CHIKKA BIDIRU LAKE 2004

Family Name of the plant2004

A M N

ANGIOSPERMS AT CHIKKA BIDIRU LAKE -2004

Family Name of the plant Apr-May Nov.

Hydrocharitaceae“ “

Hydrilla verticillata (L.f.) RoyleOttelia alismoides(L.) Pers

++

++

OnagraceaePolygonaceae

LentibulariaceaeFabaceae

Ludwigia perennis L.Polygonum glabrum L.Utricularia gibba L.subsp.exoleta (R.Br.)P.TaylorAeschynomene indica L.

++++

++++

NymphaeaceaeAmaranthaceae

AsteraceaeAponogetonaceae

Nymphoides indica (L.) O. KuntzeAlternanthera philoxeroides (Mart.) Griseb.Sphaeranthus indicus L.Aponogeton natans (L.) Engl. & Kr.

(S )

++++

++++

AcanthaceaeApiaceae

Hygrophila auriculata (Schum.)HeineCentella asiatica (L.) Urb.

++

++

Sand mining at its initial phaseits initial phase

Utricularia gibba L.subsp.exoleta (R.Br.)P.Taylor



A M N

ANGIOSPERMS AT CHIKKA BIDIRU LAKE-2005




++

++




++++

++++




(S )

++++

++++

AcanthaceaeApiaceae


++

++



A M N





++

++




++++

++--




(S )

++++

++++

AcanthaceaeApiaceae


++

++

Brick kilns very close to the lakec s e y c ose o e a e

Desilted soil after sand mining

Crevices created on the dry bed of the lake

during summerduring summer

Centella asiatica (L.) Urb.



A M N





+-

--




++--

++--




(S )

-+++

-+++

AcanthaceaeApiaceae


++

++

A t tAponogeton natans (L.) Engl. & Kr.

Hygrophila auriculata (Schum.)Heine

Sphaeranthus indicus L.

P l l bPolygonum glabrum L.

Alternanthera philoxeroides (Mart.) Griseb.

Ludwigia perennis L.g p



A M N





--

--




++--

++--




(S )

-+++

-+++

AcanthaceaeApiaceae


++

++

DISTRIBUTION OF AQUATIC ANGIOSPERMS FROM 2004-2008

Year No. of Families

No. of species

2004 11 122004 11 122005 11 122006 11 122006

Apr-May11 12

2006 11 10Nov-Jan

2007A M

08 08Apr-May

2007Nov-Jan

07 07Nov-Jan

2008 07 07

14

12

14

2004

8

10 2005

2006 Apr‐May

6

82006 Nov‐Jan

2007 Apr‐May

2

4 2007 Nov‐Jan

2008

0

No. of Families No. of species

Chart showing Distribution of Aquatic Angiosperm Families and species from 2004-2008

Aquatic Angiosperms Angiosperms

grown in artificial conditioncondition

Nymphoides indica (L ) O KuntzeNymphoides indica (L.) O. Kuntze

Ottelia alismoides(L.) Pers.

CONCLUSION

Chikka Bidiru lake reveals a drastic fall in the number ofspecies mainly due to human interference like the sandmining and the preparation of bricks.

Many of the aquatic angiosperms seems to have disappearedfrom this lake which were unique to this lake and hadexisted in this habitat for long.g

The sturdy plants have survived even after this onslaught.

The lake which was once used by children to beat the heat ofThe lake which was once used by children to beat the heat ofthe summer has now turned into a dangerous zone for swimmers.

Strong remedial measures have to be taken up by the concerned authorities to maintain this lake and

prevent it from becoming another lake that exists only i hiin history.

BIBLIOGRAPHYAnsari, R. 2007. Conservation of the rare wetland plants of south India‐A report on the IIN‐India Small Grant Project. Malabar botanical garden. Kozhikode.Ansari, R. et al. 2001. A floristic account of Malabar botanical garden. Ansari, R. et al. 2001. A floristic account of Malabar botanical garden. Malabar botanical garden. KozhikodeChristopher Cook, D.K. 1996. Aquatic and wetland plants of India. Oxford University Press. New Delhi.R S V & R i B A Fl f B l Di t i t Rangaswamy, S.V. & Razi, B.A. 1973. Flora of Bangalore District. Prasaranga. University of Mysore. Mysore.Saldanha, C.J. : 1984. Flora of Karnataka – Vol‐I. Oxford and IBH Publishing Co. New Delhi.gSaldanha, C.J. : 1996. Flora of Karnataka – Vol‐II. Oxford and IBH Publishing Co. New Delhi.Sharma B.D. et al. 1984. Flora of Karnataka. Botanical Survey of India.

Acknowledgement

DR. V.K. HARIDASAN,Selection Grade Lecturer, Department of Botany, St. Joseph’s College,N 6 L lb h R d No. 36, Lalbagh Road,

Banglore‐560027

DR. R. ANSARI,Principal Investigator,

Malabar Botanical Garden,Malabar Botanical Garden,G.A.College Post,

Kozhikode,Kerala 673 01473 4

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