Observations on the flowering and fruit developments in Halophila stipulacea (Hydrocharitaceae) in the Aegean Sea (Turkey)


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OKUDAN E. Ş.

JOURNAL OF THE BLACK SEA/MEDITERRANEAN ENVIRONMENT, vol.26, no.1, pp.1-16, 2020 (Peer-Reviewed Journal)

Abstract

 

 The flowering and fruiting of Halophila stipulacea (Forsskål) Ascherson were followed on the Turkish coasts of the Aegean Sea, and both male and female flowers were recorded at the same location for the first time. Male and female flowers were found between mid-April and late September. In shallow coastal water, male flowers were fewer than female flowers, while in deep zones, female flowers were fewer than male flowers. The female flowers of H. stipulacea had three styles, but four styles of flowers were also found exceptionally. At the research stations, the plants and flowers showed a lower limit of 30 m depth and an upper limit of between 1 and 8 m. The upper limit of female plants was 4 m, and that of male plants was 6 m. Besides, flowering was recorded generally in very dense populations.

Bu araştırmada, Ege Denizi kıyılarında dağılım gösteren Halophila stipulacea (Forsskål) Ascherson türünün çiçeklenme ve meyve gelişiminin Nisan ayının ortalarından Eylül ayının sonlarına kadar devam ettiği, erkek ve dişi çiçeklerin aynı alanda dağılım gösterdiği tespit edilmiştir. Dişi çiçeklerin sığ, erkek çiçeklerin ise derin sularda sayıca fazla bulunduğu ve çiçeklenmenin dağılımının alt ve üst sınırının 4-30 m olduğu gözlenmiştir.