scholarly journals Seagrass species composition and above-ground carbon stock mapping in Parang Island using Planetscope image

2019 ◽  
Author(s):  
Indinna S. Astuty ◽  
Pramaditya Wicaksono
Keyword(s):  
Species Composition ◽  
Carbon Stock ◽  
Seagrass Species

scholarly journals A Comparison of Abundance and Diversity of Epiphytic Microalgal Assemblages on the Leaves of the SeagrassesPosidonia oceanica(L.) andCymodocea nodosa(Ucria) Asch in Eastern Tunisia

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Lotfi Mabrouk ◽  
Mounir Ben Brahim ◽  
Asma Hamza ◽  
Mabrouka Mahfoudhi ◽  
Med Najmeddine Bradai
Keyword(s):  
Growth Rate ◽  
Species Composition ◽  
Posidonia Oceanica ◽  
Cymodocea Nodosa ◽  
Seagrass Species ◽  
Light Penetration ◽  
Grazing Effect ◽  
Abundance And Diversity ◽  
Fast Growing Species ◽  
Host Characteristics

We studied spatial patterns in assemblages of epiphytic microalgae on the leaves of two seagrass species with different morphologies and longevity,Cymodocea nodosaandPosidonia oceanica, which cooccur in Chebba in Eastern Tunisia. Epiphyte assemblages were described for each species in summer. Epiphyte microalgal assemblages were more abundant on the leaves ofC. nodosabut more diversified on the leaves ofP. oceanica. We suggest that the differences in species composition and abundance between those seagrass species may reflect an interaction of timescales of seagrass longevity with timescales of algal reproductive biology. Short-livedC. nodosawas dominated by fast growing species such as the cyanobacteria speciesOscillatoriasp., whileP. oceanicaleaves were colonized by more mature and diversified species such as Prorocentrales. Local environmental conditions (hydrodynamics, light penetration), host characteristics (meadow type, shapes forms of leaves, life span, and growth rate), and grazing effect seem also to be responsible for these dissimilarities in epiphytic microalgae communities.

scholarly journals KAJIAN KOMUNITAS EKOSISTEM LAMUN DI SEMENANJUNG TARABITAN KECAMATAN LIKUPANG BARAT KABUPATEN MINAHASA UTARA

2021 ◽  
Vol 9 (2) ◽  
pp. 24
Author(s):  
Risandi D Sitaba ◽  
Carolus P Paruntu ◽  
Billy Theodorus Wagey
Keyword(s):  
Species Composition ◽  
Percent Cover ◽  
Seagrass Beds ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium

This research was conducted in the waters of Tarabitan Peninsula, West Likupang North Minahasa using quadants transect method. The purpose of this study was to determine the community structure of seagrass found in that waters as initial information for sustainable management seagrass ecosystem . Field observation was conducted to identify the seagrass species, number of individuals/shoots, percent cover for each type of seagrass in those plotting quadrants. The result of this study documented 6 types of seagrass namely, Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis and Halodule uninervis. The species composition and distribution of seagrass were varied and was dominated by Thalassia hemprichii was the most dominant seagrass species with a relative density of 55.55%, a relative frequency of 33.67%, 39.92% relative cover, an important value index of 129.03%, a diversity index of 1.30 belonging to this condition, moderate, the uniformity index of 0.72 is classified as high and the dominance index of 0.2 is classified as low. Based on Minister of Environment Decree Republic Indonesia No. 200 of 2004 concerning the status of seagrass beds, the condition of the seagrass beds in the waters of Tarabitan Village is classified as rich / healthy with a cover value of ≥ 60. Keywords : Seagrass Community, Species Composition,  distribution, Tarabitan Peninsula           Penelitian ini dilakukan di perairan Semenanjung Tarabitan Likupang Barat Minahasa Utara dengan menggunakan metode transek kuadran. Tujuan penelitian ini adalah untuk mengetahui struktur komunitas lamun yang terdapat di perairan tersebut sebagai informasi awal untuk pengelolaan lamun secara berkelanjutan. Pengamatan lapangan dilakukan untuk mengidentifikasi jenis lamun, jumlah individu/tegakan, persentase tutupan tiap jenis lamun pada tiap kuadran. Hasil penelitian ini mendokumentasikan 6 jenis lamun yaitu Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis dan Halodule uninervis. Komposisi jenis dan sebaran lamun bervariasi dan didominasi oleh jenis lamun Thalassia hemprichii merupakan jenis lamun yang paling dominan dengan kerapatan relatif 55,55%, frekuensi relatif 33,67%, tutupan relatif 39,92%, indeks nilai penting 129,03%, indeks keanekaragaman 1,30 tergolong dalam kondisi sedang, indeks keseragaman 0,72 tergolong tinggi dan indeks dominansi 0,2 tergolong rendah. Berdasarkan Keputusan Menteri Lingkungan Hidup Nomor 200 Tahun 2004, kondisi padang lamun di perairan Desa Tarabitan tergolong kaya / sehat dengan nilai tutupan ≥ 60.Kata Kunci: Komunitas Lamun, Komposisi Jenis, Distribusi, Semenanjung Tarabitan

scholarly journals Functional implications of changes in seagrass species composition in two shallow coastal lagoons

2016 ◽  
Vol 557 ◽  
pp. 111-121 ◽  
Author(s):  
B Christiaen ◽  
JC Lehrter ◽  
J Goff ◽  
J Cebrian
Keyword(s):  
Species Composition ◽  
Coastal Lagoons ◽  
Seagrass Species ◽  
Functional Implications

scholarly journals Changes in Seagrass Species Composition in Northwestern Gulf of Mexico Estuaries: Effects on Associated Seagrass Fauna

PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e107751 ◽  
Author(s):  
Brandon R. Ray ◽  
Matthew W. Johnson ◽  
Kirk Cammarata ◽  
Delbert L. Smee
Keyword(s):  
Gulf Of Mexico ◽  
Species Composition ◽  
Seagrass Species

scholarly journals ALTERATION OF SEAGRASS SPECIES COMPOSITION AND FUNCTION OVER TWO DECADES

2008 ◽  
Vol 78 (2) ◽  
pp. 225-244 ◽  
Author(s):  
Fiorenza Micheli ◽  
Melanie J. Bishop ◽  
Charles H. Peterson ◽  
José Rivera
Keyword(s):  
Species Composition ◽  
Seagrass Species ◽  
And Function

scholarly journals Vegetation Structure, Species Composition, and Carbon Sink Potential of Urban Green Spaces in Nagpur City, India

Land ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 107
Author(s):  
Shruti Lahoti ◽  
Ashish Lahoti ◽  
Rajendra Kumar Joshi ◽  
Osamu Saito
Keyword(s):  
Growth Rate ◽  
Species Composition ◽  
Tree Species ◽  
Carbon Stock ◽  
Species Selection ◽  
Green Spaces ◽  
Local Authorities ◽  
Urban Green ◽  
Urban Green Spaces ◽  
The City

Nagpur is rapidly urbanizing, and in the process witnessing decline in its green status which is one of the identities of the city. The study aims to understand the current species diversity, composition and structure in different classes of greens prevalent in the city. As urban green spaces (UGS) are also reservoirs of carbon stock, the study estimates their biomass. Through rigorous field work, data were collected from 246 sample plots across various UGS classes as pre-stratification. Then the biomass was estimated using non-destructive method with species-specific equation. The diversity of tree species recorded in UGS varies, with high diversity recorded in avenue plantation and institutional compounds. The overall variation in species composition among UGS classes was 36.8%. While in managed greens the species composition was similar, in institutional greens and forest it was different. Particularly, in forest the evenness was high with low diversity and low species richness. The structural distribution indicate lack of old trees in the city, with high number of tree species between diameter classes of 10–40 cm. Biomass was recorded high in road-side plantations (335 t ha−1) and playgrounds (324 t ha−1), and trees with bigger girth size where the main contributors. The dominant species indicates that high growth rate, tolerance to drought and pollution are the key attributes considered for species selection by local authorities. Though the city holds green image, vegetation along the avenues and institutions are stressed, exposed, and threatened by felling activities for grey infrastructure expansions. In such scenario, protection and preservation of older trees is crucial to maintain the carbon stock of the city. In addition, local authorities need to focus on effective afforestation programs through public participation to achieve high survival rate and reduce the maintenance cost. For species selection in addition to phenology and growth rate, tree biomass and life span needs to be considered to significantly enhance the urban environment and increase the benefits derived from UGS.

scholarly journals Carbon stock estimation of seagrass species thalassia hempricii using planet imagery with band ratio transformation in nirwana beach, padang city

2019 ◽  
Vol 280 ◽  
pp. 012039
Author(s):  
Zulfikri Isnaen ◽  
Abimanyu Putra Pratama ◽  
Adriati Annisa Utami ◽  
Aldo Restu Agi Prananda ◽  
Andes Dias Purnama ◽  
...  
Keyword(s):  
Carbon Stock ◽  
Seagrass Species ◽  
Band Ratio ◽  
Stock Estimation

scholarly journals Dugong dugonfeeding in tropical Australian seagrass meadows: implications for conservation planning

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2194 ◽  
Author(s):  
Samantha J. Tol ◽  
Rob G. Coles ◽  
Bradley C. Congdon
Keyword(s):  
Species Composition ◽  
Nitrogen Content ◽  
Conservation Strategies ◽  
Total Biomass ◽  
Seagrass Species ◽  
Seagrass Meadows ◽  
Eastern Australia ◽  
North Eastern ◽  
Seagrass Biomass ◽  
Intertidal Seagrass

Dugongs (Dugong dugon) are listed as vulnerable to extinction due to rapid population reductions caused in part by loss of seagrass feeding meadows. Understanding dugong feeding behaviour in tropical Australia, where the majority of dugongs live, will assist conservation strategies. We examined whether feeding patterns in intertidal seagrass meadows in tropical north-eastern Australia were related to seagrass biomass, species composition and/or nitrogen content. The total biomass of each seagrass species removed by feeding dugongs was measured and compared to its relative availability. Nitrogen concentrations were also determined for each seagrass species present at the sites. Dugongs consumed seagrass species in proportion to their availability, with biomass being the primary determining factor. Species composition and/or nitrogen content influenced consumption to a lesser degree. Conservation plans focused on protecting high biomass intertidal seagrass meadows are likely to be most effective at ensuring the survival of dugong in tropical north-eastern Australia.

Species composition, diversity, and carbon stock in trees outside forests in middle hills of Nepal

2021 ◽  
Vol 125 ◽  
pp. 102402
Author(s):  
Shes Kanta Bhandari ◽  
Tek Maraseni ◽  
Yajna Prasad Timilsina ◽  
Rajan Parajuli
Keyword(s):  
Species Composition ◽  
Carbon Stock ◽  
Trees Outside Forests
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