scholarly journals Trophic importance of the seagrass Halophila ovalis in the food web of a Hepu seagrass bed and adjacent waters, Beihai, China

2021 ◽  
Vol 125 ◽  
pp. 107607
Author(s):  
Jinlan Lin ◽  
Xinming Liu ◽  
Tinghe Lai ◽  
Binyuan He ◽  
Jianguo Du ◽  
...  
Keyword(s):  
Food Web ◽  
Seagrass Bed ◽  
Halophila Ovalis

Quantitative food web structure and ecosystem functions in a warm-temperate seagrass bed

2021 ◽  
Vol 168 (5) ◽  
Author(s):  
Xiaoxiao Li ◽  
Wei Yang ◽  
Tao Sun ◽  
Ursula Gaedke
Keyword(s):  
Food Web ◽  
Ecosystem Functions ◽  
Seagrass Bed ◽  
Food Web Structure ◽  
Web Structure ◽  
Warm Temperate

scholarly journals DIVERSITY OF MOLLUSC COMMUNITIES IN THE SEAGRASS BED IN PULAU GAZUMBO, PENANG, MALAYSIA

2018 ◽  
Vol 32 (2) ◽  
pp. 123-127
Author(s):  
Aileen Tan Shau Hwai ◽  
Nur-najmi Basyeer Bt. Abdul Karim ◽  
Zulfigar Yasin
Keyword(s):  
Dominant Species ◽  
Seagrass Beds ◽  
Seagrass Species ◽  
Seagrass Bed ◽  
Halophila Ovalis ◽  
The Family

A study on the diversity of mollusc communities inhabiting the seagrass bed of Pulau Gazumbo, Penang, which is known as a manmade island covered with seagrass communities in Malaysia, was conducted. The seagrass species reported in this island are Halophila ovalis Hook (1858), H. ovata Gaud (1827), H. spinulosa Aschers (1875) and H. beccarii den Hartog (1977), with H. ovalis being the dominant species. A total of 15 random lmx lm quadrates were taken on the seagrass bed around the island during lowest tide. A total of 14 species from 12 genera and 9 families of gastropods and a total of 8 species from 8 genera and 6 families of bivalves were reported in this study. Nassarius livescens from the Family Nassariidae is the most dominant molluscs (18 individuals per m2) inhabiting the seagrass beds.

Two new species of the genus Daptonema Cobb, 1920 (Nematoda: Xyalidae) found in the monospecific Halophila ovalis patches within an intertidal mixed-species seagrass bed on the coast of the Andaman Sea, Thailand

Zootaxa ◽  
2012 ◽  
Vol 3350 (1) ◽  
pp. 34
Author(s):  
CHITTIMA ARYUTHAKA ◽  
KENJI KITO
Keyword(s):  
New Species ◽  
Andaman Sea ◽  
Seagrass Bed ◽  
Mixed Species ◽  
Halophila Ovalis ◽  
Key Characteristics ◽  
Two New Species

Daptonema hyalocella sp. n. and D. setihyalocella sp. n. are described from the Ban Pa Khlok seagrass bed, Phuket Prov-ince, Thailand. These new species are characterized by the epidermal chords consisting of large cells with a transparentappearance, as in D. conicum (Filipjev, 1922) and D. trabeculosum (G. Schneider, 1906). The key characteristics of D.hyalocella sp. n. are the peculiar epidermal chords, loose S-shaped spicules with no proximal cephalation, an indistinctgubernaculum with a lateral piece, and two terminal setae. For D. setihyalocella sp. n., the key characteristics are similarpeculiar epidermal chords, but in this case with the L-shaped spicules having proximal cephalation, a distinct gubernaculum with dorsal apophysis and lateral piece, and four terminal setae.

scholarly journals Komposisi Jenis Lamun (Seagrass) Di Kawasan Pantai Malagoso Desa Dumolodo Kecamatan Gentuma Raya Kabupaten Gorontalo

2018 ◽  
Vol 1 (1) ◽  
pp. 12
Author(s):  
Nurul Auliyah
Keyword(s):  
Water Quality ◽  
Seagrass Beds ◽  
Seagrass Bed ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Syringodium Isoetifolium ◽  
Seagrass Density

This research aims to identificated the composition of the type and seagrass beds density in malagoso beach, Dulomodo Village. The data was undetaken by survei method and transect square method. There are 3 stations where every stations will cut in 3 times. The analysis used and covering identification of the type of seagrass beds, density, coverage of seagrass and the closure of the parameters of the enviroment. The results of identification to research is found 4 types species of seagrass, there is  Enhalus acoroides, Cymodocea serurulata, Halophila ovalis, Syringodium isoetifolium. Seagrass beds density ranged from 20 tegakan/m -600 tegakan/m. The parameter of water quality there are temperature 200C, salinity31 ppt, pH 8,2, brightess about 0,2-1 meters, the substrates are muddy and rocky.Keywords : Seagrass density, The seagrass bed, Malagoso beach. 

scholarly journals Stable Isotope Tracer Addition Reveals the Trophic Status of Benthic Infauna at an Intertidal Area Adjacent to a Seagrass Bed

2021 ◽  
Vol 8 ◽  
Author(s):  
Wenzhe Xu ◽  
Yongxin Dang ◽  
Siu Gin Cheung ◽  
Zhinan Zhang ◽  
Jun Sun ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Trophic Status ◽  
Tracer Experiment ◽  
Seagrass Bed ◽  
Intertidal Area ◽  
Primary Producers ◽  
Stable Isotope Tracer ◽  
Isotope Tracer ◽  
Benthic Infauna

Stable isotope tracer addition can enhance the isotopic differences of primary producers for a wider food-web resolution than the use of natural abundance stable isotopes (NASIs) alone, particularly in ecosystems where primary producers have similar NASI values. To investigate the food sources and the trophic status of benthic infauna in an intertidal area near a Halophila minor seagrass bed within inner Tai Tam Bay, Hong Kong, China, a 15N addition experiment was conducted, and the results were compared with those from NASI data. Only benthic microalgae (BMA) were labeled by applying 15N-enriched NH4Cl to the sediment daily for the first 7 days during a 21-day study. In contrast to the NASI results, Bayesian mixing models based on the isotope tracer experiment suggested a larger dietary contribution of BMA for nematode Daptonema sp. and copepods, whereas a higher reliance on phytoplankton and seagrass detritus was noted for polychaete Neanthes sp. However, both NASI and isotope tracer addition demonstrated that seagrass detritus was a major food source for nematode Spilophorella sp. The present isotope tracer experiment also revealed a contrasting result of the relatively lower contribution of meiofauna in the diets of carnivores/omnivores as compared to the results of NASIs. This finding suggested that the isotope values in these consumers may have not reached an equilibrium with the added isotope in the study period. Thus, there is a need for applying NASI coupled with isotope tracer addition in the investigation of ecosystems in which primary producers have similar isotope values, especially in ecosystems with lower tissue turnover rates, in order for a more accurate determination of dietary contribution and trophic status of consumers in the food-web study.

PEMETAAN SEBARAN PADANG LAMUN MENGGUNAKAN CITRA SATELIT LANDSAT 8 DI KEPULAUAN TANIMBAR KABUPATEN MALUKU TENGGARA BARAT PROVINSI MALUKU

2019 ◽  
Vol 3 ◽  
pp. 871
Author(s):  
Desita Anggraeni ◽  
M. Nurkholis Fauzi ◽  
Christian Novia Ngesti H.
Keyword(s):  
Landsat 8 ◽  
Surface Reflectance ◽  
Halophila Ovalis ◽  
Halodule Uninervis ◽  
Gap Data

Padang lamun merupakan habitat penting pesisir yang memiliki peran kunci dalam ekosistem pesisir. Kawasan ini merupakan area asuhan bagi ikan-ikan kecil, udang, persembunyian biota dari predatornya, pendaur zat hara, serta penyerap nutrien dari limpasan air laut yang dapat membantu menstabilkan sedimen dan kejernihan air. Kepulauan Tanimbar merupakan salah satu lokasi di Provinsi Maluku dengan potensi sebaran lamun yang cukup luas, namun informasi mengenai sebaran lamun di kawasan ini tidak terdata dengan baik. Teknologi penginderaan jauh merupakan salah satu alternatif untuk mengisi gap data di area yang luas dan sulit dijangkau, termasuk untuk memetakan sebaran lamun di Kepulauan Tanimbar. Penelitian ini bertujuan untuk menyediakan data dasar sebaran dan luas habitat lamun di pesisir Kepulauan Tanimbar. Metode yang digunakan adalah analisis citra penginderaan jauh Landsat 8, menerapkan penajaman citra untuk perairan dangkal menggunakan algoritma Lyzenga. Citra Landsat yang digunakan Landsat Surface Reflectance liputan path/row 106/65 dan 106/66 tahun perekaman 2017. Pengambilan data lapangan dilakukan pada tanggal 1-10 November 2017. Metode pengambilan data lamun dilakukan menggunakan metode seagrass watch . Hasil pengolahan citra menunjukkan lamun terdistribusi merata di seluruh pesisir Kepulauan Tanimbar dengan luas total 5.615,63 hektar dengan tutupan terpadat di sekitar Pulau Seira. Hasil survei lapangan menunjukkan tutupan lamun terpadat dijumpai di Formusan dengan tutupan lamun rata-rata 95%. Kondisi lamun paling baik berada di daerah Sabal, didukung kondisi air yang sangat jernih dengan substrat utama pasir. Berdasarkan hasil pengamatan lapangan, jenis lamun yang ditemukan antara lain: E n h alu s a c o r oid e s , T h ala s sia h e m p ric hii, C y m o d o c e a s e r r ula t a , C y m o d o c e a rotundata, Syringodi um isoetifolium, Halodule uninervis, Halophila ovalis, dan Halophila minor .

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