南灣海域松藻及海葵族群大量擴張的生態機制及珊瑚群聚復育的研究﹝3/3﹞
Date Issued
2004
Date
2004
Author(s)
DOI
922313B002068
Abstract
The population outbreaks macroalgae
and sea anemones that causing the
degradation of coral reefs in Nanwan Bay
were studied. A detailed taxonomic study
by morphological and karyological methods
revealed 9 Codium species, including a new
species C. nanwanensis. The results of
culture of gametangium-like structures,
named as the propagation buds, from C.
edule showed that they have the potential to
form new thalli and can be regarded as an
effective reproductive structure. In the
field, the abundance of both gametangia and
propagation buds in the macrothalli of C.
edule were the highest in the late period of its
growing season in August. The propagation
buds may serve as a persistent stage when the
macrothalli disintegrate at the end of the
growing season and act as a seed bank for
vegetative reproduction of C. edule in the
next season. Studies on the sea anemones
from coral reefs of southern Taiwan revealed
a new species, Condylactis nanwanensis.
Most individuals of C. nanwanensis occur in
dense aggregations on or below large living
or dead branching corals, or in reef crevices.
The species is similar to the Caribbean C.
gigantea (Weinland, 1860) in number of
tentacles and mesenteries, and features of the
column, but differs in color, size, and
cnidom. Based on the recency of its
detection, its localized distribution, its high
population density, its deleterious effect on
the local fauna, and the fact that only females
were found, the population is likely to be
invasive, possibly introduced via the
aquarium trade.
Subjects
population outbreak
Codium
Condylactis
reef degradation
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
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