Taburan dua spesies cryptocoryne yang endemik di hutan simpan Pondok Tanjung
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Date
1995
Authors
M., Masnadi
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Abstract
Pondok Tanjung Forest Reserve (PTFR) consists of a swamp
forest (Pondok Tanjung) and a muddy_area (Redang Panjang).
The habitats in PTFR were suitable for the growth and
distribution of Cryptocoryne species.
The widespread distribution of Cryptocoryne elliptica
Hook. f. and Crypt?coryne minima Ridl. including its five
varieties was recorded in PTFR. Cryptocoryne elliptica was
more dominant than Q. minima in Redang Panjang and grew
well in the muddy soil (70% silt, 20% clay, 10% sand).
Whereas Q. minima (five varieties), was found to be more
abundant in Pondok Tanjung area than Redang Panjang. The
physico-chemical factors which include pH, conductivity,
dissolved oxygen and temperature in PTFR were
studied.
also
The distribution data analysis for the two Cryptocoryne
species was studied using Polar Ordination System based on
percentage coverage values indicated that the two species
could be divi~ed into six sample unit (SU) groups. Whilst
using cluster analysis, the rating values based on dendrogram
showed that the grouping of th~ two species studied
could be divided into three groups. In the group 1, 17 SU
were observed. Five SU consisted Q. minima with a rating
value of 5. Five SU with a rating value of 3, and seven SU
with the same spec{es has a rating value of 2; all these
rating values were included in group I. In group 2, 38 SU
were observed. Four SU have rating value of 1 consisted
only ~- minima and four SU from ~- elliptica have also a
rating value of 1, was included in group 2. Thirty SU with
rating value 0 consisted of the two Cryptocoryne species,
but they did not occupy the same quadrat.
Group 3 has a total of 32 SU. Eight SU were ~- elliptica
with a rating value of 5. Five SU with a rating value of 3
consisted of both species. Seventeen SU with a rating
value of 2 and two SU with a ·rating value of 1 from ~-
elliptica.
From the seed germination study in the final percentage
germination; muddy soil substrate (70% silt, 20 % clay and
10% sandy), riverine sandy substrate (100% sand) and tap
water (control) occured within 11 weeks. During this
period 100 % germination was observed for the ~- minima
' seeds which were embedded in muddy soil substrate. While
in riverine sandy substrate and tap water, only 86.6 %
germinated at the same time.
From this study, only ~. minima seeds were collected from
the field and grown in the laboratory. During the duration.
of the studied period, ~· elliptica seeds were unobtainable.
Description
Keywords
Spesies cryptocoryne , Hutan simpan Pondok Tanjung