DISTRIBUTION OF HYDROPHYTES IN LAKE BUROLLUS. BGYPT

DISTRIBUTION OF HYDROPHYTES IN LAKE BUROLLUS. BGYPT
AMIN A. SAMAAN, ZEINAB M. EL-SHERIF, EISHAY. EL-AYOUTY·
AND RAM::;ES R. ABDALLA.
Natfonal Instftute of Oceanography and Ffsherfes, Egypt.
*Faculty of Scfence, Cafro Unfversfty, Egypt.
ABSTRACT
lake Buroll us is characterf zed by havf ng
an extensfve growth of hydrophytes,
partfcularly along fts southern shores besfde
the outlets of land drafns as well as fn
the eastern lake. The submerged plants
were mainly represented by Potauogeton
pectfnatus l. while Pot~ton cr1spus
l. and CerliitophyllUlill d!mers. L. were less
frequent. Mlljas anal!u l1 nd. F. was of very
limfted dfstrlbutfon. The emergent
hydrophytes fncluded PhragDftes ~dftis
(l.) Trln and TJ?hc G~stralfs Schumt and
Thow. These plants gro’!.:”..l at the lake
margfns and around the ‘1he floatfng
plants Eichorn!. cr5ss ‘~,·t.) Solms~
laub., lemna gtbba t. and Splrodel. polyrrhlZI
(L.) Schlefd appeared also besfde the o~,tlets
of the land drains where their growth Is
~ivoJred by the flowfng fresh water.
The growth cycle of P. pectfnatus fn
the lake showed two growth perf ods durfng
sprfng and fn late slIIIIIIer wf th averaye
standfng crops of 4.Z and 4.8 Kg fresh wt.l_ , respecttvely.
The dense growth of submerged and floatfng
plants fn the lllke harbours water fowls
which utl1fze them as food. It 15 recolll11ended
to control the progressive extensfon of
Phragllftes c~nfs In order to restrict
Hs growth to 11mf ted erus.