Assemblages of cryptic animals in coral rubble along an estuarine gradient spanning mangrove, seagrass, and coral reef habitats

2014 ◽  
Vol 90 (2) ◽  
pp. 723-740 ◽  
Author(s):  
Yoshitake Takada ◽  
Hideki Ikeda ◽  
Yuriko Hirano ◽  
Masayuki Saigusa ◽  
Kazumasa Hashimoto ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Rubble ◽  
Estuarine Gradient

scholarly journals Representative benthic habitat mapping on Lovina coral reefs in Northern Bali, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Anggita Kartikasari ◽  
TODHI PRISTIANTO ◽  
RIZKI HANINTYO ◽  
EGHBERT ELVAN AMPOU ◽  
TEJA ARIEF WIBAWA ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Habitat Mapping ◽  
Benthic Habitat ◽  
Coral Rubble ◽  
Spatial Coverage ◽  
Coral Reef Ecosystems ◽  
Optical Imagery ◽  
Sentinel 2

Abstract. Kartikasari A, Pristianto T, Hanintyo R, Ampou EE, Wibawa TA, Borneo BB. 2021. Representative benthic habitat mapping on Lovina coral reefs in Northern Bali, Indonesia. Biodiversitas 22: 4766-4774. Satellite optical imagery datasets integrated with in situ measurements are widely used to derive the spatial distribution of various benthic habitats in coral reef ecosystems. In this study, an approach to estimate spatial coverage of those habitats based on observation derived from Sentinel-2 optical imagery and a field survey, is presented. This study focused on the Lovina coral reef ecosystem of Northern Bali, Indonesia to support deployment of artificial reefs within the Indonesian Coral Reef Garden (ICRG) programme. Three specific locations were explored: Temukus, Tukad Mungga, and Baktiseraga waters. Spatial benthic habitat coverages of these three waters was estimated based on supervised classification techniques using 10m bands of Sentinel-2 imagery and the medium scale approach (MSA) transect method of in situ measurement.The study indicates that total coverage of benthic habitat is 61.34 ha, 25.17 ha, and 27.88 ha for Temukus, Tukad Mungga, and Baktiseraga waters, respectively. The dominant benthic habitat of those three waters consists of sand, seagrass, coral, rubble, reef slope and intertidal zone. The coral reef coverage is 29.48 ha (48%) for Temukus covered by genus Acropora, Isopora, Porites, Montipora, Pocillopora. The coverage for Tukad Mungga is 8.69 ha (35%) covered by genus Acropora, Montipora, Favia, Psammocora, Porites, and the coverage for Baktiseraga is 11.37 ha (41%) covered by genus Montipora sp, Goniastrea, Pavona, Platygyra, Pocillopora, Porites, Acropora, Leptoseris, Acropora, Pocillopora, Fungia. The results are expected to be suitable as supporting data in restoring coral reef ecosystems in the northern part of Bali, especially in Buleleng District.

scholarly journals Effect of coral reef restoration on demersal biodiversity in Okinawa, Japan

2019 ◽  
Author(s):  
Piera Biondi ◽  
Giovanni D Masucci ◽  
James D Reimer
Keyword(s):  
Coral Reef ◽  
Global Climate ◽  
Live Coral ◽  
Coral Rubble ◽  
Okinawa Island ◽  
Reef Restoration ◽  
Coral Coverage ◽  
Coral Reef Ecosystems ◽  
Abundance And Diversity ◽  
And Control

Global climate change is leading to damage and loss of coral reef ecosystems. On subtropical Okinawa Island in southwestern Japan, the prefectural government is working on coral reef restoration by outplanting coral colonies from family Acroporidae back to reefs after initially farming colonies inside protected nurseries. In this study we evaluated the ongoing restoration efforts by comparing outplanted locations with nearby control locations with no restoration activity. We examined 3 sites on the coast of Onna Village on the west coast of the island; each site included an outplanted and control location. We used 1) coral rubble sampling to evaluate and compare abundance and diversity of rubble cryptofauna; and 2) coral reef monitoring using photograph transects to track live coral coverage. Results showed that rubble shape had a positive correlation with the numbers of animals found within rubble themselves and may therefore constitute a reliable abundance predictor. Outplanted locations did not show differences with the controls in rubble cryptofauna abundance, but had significantly lower coral coverage. Differences between sites were significant, for both rubble cryptofauna and coral coverage.We recommend; 1) to evaluate outplanting colonies from more stress-resistant genera in place of Acropora, 2) to conduct regular surveys to monitor the situation closely, and 3) to establish conservation and sustainable practices that could aid restoration efforts, reducing coral mortality of both outplanted and native colonies.

scholarly journals Coral Reef Mapping of UAV: A Comparison of Sun Glint Correction Methods

2019 ◽  
Vol 11 (20) ◽  
pp. 2422 ◽  
Author(s):  
Muslim ◽  
Chong ◽  
Safuan ◽  
Khalil ◽  
Hossain
Keyword(s):  
Coral Reef ◽  
Image Data ◽  
Peninsular Malaysia ◽  
Coral Rubble ◽  
Distribution Mapping ◽  
Multi Temporal ◽  
Aerial Vehicle ◽  
Accuracy Result ◽  
Uav Image ◽  
Removal Technique

Although methods were proposed for eliminating sun glint effects from airborne and satellite images over coral reef environments, a method was not proposed previously for unmanned aerial vehicle (UAV) image data. De-glinting in UAV image analysis may improve coral distribution mapping accuracy result compared with an uncorrected image classification technique. The objective of this research was to determine accuracy of coral reef habitat classification maps based on glint correction methods proposed by Lyzenga et al., Joyce, Hedley et al., and Goodman et al.. The UAV imagery collected from the coral-dominated Pulau Bidong (Peninsular Malaysia) on 20 April 2016 was analyzed in this study. Images were pre-processed with the following two strategies: Strategy-1 was the glint removal technique applied to the whole image, while Strategy-2 used only the regions impacted by glint instead of the whole image. Accuracy measures for the glint corrected images showed that the method proposed by Lyzenga et al. following Strategy-2 could eliminate glints over the branching coral—Acropora (BC), tabulate coral—Acropora + Montipora (TC), patch coral (PC), coral rubble (R), and sand (S) with greater accuracy than the other four methods using Strategy-1. Tested in two different coral environments (Site-1: Pantai Pasir Cina and Site-2: Pantai Vietnam), the glint-removed UAV imagery produced reliable maps of coral habitat distribution with finer details. The proposed strategies can potentially be used to remove glint from UAV imagery and may improve usability of glint-affected imagery, for analyzing spatiotemporal changes of coral habitats from multi-temporal UAV imagery.

scholarly journals KOMPARASI POLA SPASIAL KONDISI TERUMBU KARANG TAMAN NASIONAL KARIMUNJAWA

2021 ◽  
Vol 14 (2) ◽  
pp. 175-184
Author(s):  
M Munasik ◽  
Andy Ahmad Romadhoni ◽  
Muhammad Helmi
Keyword(s):  
Coral Reef ◽  
Spatial Pattern ◽  
National Park ◽  
Coral Cover ◽  
Assessment Method ◽  
Live Coral ◽  
Dead Coral ◽  
Coral Rubble ◽  
Management Zones ◽  
Protection Zone

ABSTRACTComparative studies on the percentage of coral reef substrate cover have been carried out in 3 (three) management zones (protection zone, utilization and Non-MPA) Karimunjawa National Park (KNP). The Manta Tow broadscale coral reef assessment method was applied to the north side of Bengkoang Island and the south side of Cemara Besar Island (protection zone), southern side of Bengkoang Island and northern side of Cemara Besar Island (utilization zone) and Non-MPA (Seruni Island) to observe live coral cover, dead coral, coral rubble and soft coral. Substrate cover variations from 10-12 towing (track length 200m) from each side of the island have formed a spatial pattern of coral reef conditions. Furthermore, the condition of the coral reefs was confirmed using the UPT (Underwater Photo Transect) detailed assessment method with one station on each side of the island. The results showed that there were differences in the spatial pattern of coral reef conditions as indicated by significant differences in the percentage of live coral cover, dead coral, rubble and coral lifeform among management zones of the KNP. The condition of coral reefs of the MPA is better and has a higher diversity of coral species than Non-MPA of the Karimunjawa National Park. The spatial pattern of coral reef conditions can be used as an indicator of disturbances in the coral reef ecosystem and can be used for periodic analysis of coral reef monitoring data in conservation areas.Keywords: spatial pattern, coral reef condition, manta tow, underwater photo transect, Karimunjawa National Park.ABSTRAKStudi perbandingan persentase tutupan substrat terumbu karang telah di lakukan pada 3 (tiga) zona pengelolaan (zona perlindungan, pemanfaatan dan luar kawasan) Taman Nasional Karimunjawa. Metode penilaian terumbu karang skala luas Manta Tow diaplikasikan di sisi utara P. Bengkoang dan sisi selatan P. Cemara Besar (zona perlindungan), sisi selatan P. Bengkoang dan sisi utara P. Cemara Besar (zona pemanfaatan) dan luar kawasan (P. Seruni) untuk mengamati tutupan karang hidup, karang mati, pecahan karang dan karang lunak. Variasi persentase tutupan substrat dari 10-12 tarikan Manta Tow (panjang lintasan 200m) dari masing-masing sisi pulau telah membentuk pola spasial kondisi terumbu karang. Selanjutnya penilaian kondisi terumbu karang dikonfirmasi dengan menggunakan metode penilaian rinci UPT (Underwater Photo Transect) dengan satu stasiun setiap sisi pulau. Hasil menunjukkan terdapat perbedaan pola spasial kondisi terumbu karang yang ditunjukkan oleh perbedaan yang signifikan persentase tutupan karang hidup, karang mati, pecahan karang dan lifeform karang antar zona pengelolaan.  Kondisi terumbu karang di dalam kawasan lebih baik dan memiliki keragaman jenis karang lebih tinggi daripada di luar kawasan Taman Nasional Karimunjawa. Pola spasial kondisi terumbu karang dapat dijadikan indikator terjadinya gangguan pada ekosistem terumbu karang di suatu kawasan dan dapat digunakan untuk analisis data pemantauan terumbu karang secara berkala di kawasan konservasi.Kata Kunci: pola pasial, kondisi terumbu karang, manta tow, underwater photo transect, Taman Nasional Karimunjawa,

A new species of Nuuanu (Crustacea, Amphipoda, Nuuanuidae) from a Caribbean coral reef with identification keys to males and females of Nuuanu species

Zootaxa ◽  
2017 ◽  
Vol 4294 (2) ◽  
pp. 197
Author(s):  
MANUEL ORTIZ ◽  
IGNACIO WINFIELD
Keyword(s):  
New Species ◽  
Coral Reef ◽  
Similar Species ◽  
Coral Rubble ◽  
Cephalic Lobe ◽  
Tropical Coral ◽  
Caribbean Coral Reef ◽  
Tropical Coral Reef ◽  
Males And Females ◽  
A New Species

A new species of amphipod of the genus Nuuanu is described and illustrated, and is diagnosed against the morphologically most similar species. It was collected in coral rubble from a tropical coral reef, NW Caribbean Sea. The new species increases the number of Nuuanu species recorded to 20 worldwide. Nuuanu jaumei sp. nov., can be distinguished from other members of the genus by a combination of characters: head with bigeminal dispersed eyes; mammiliform lateral cephalic lobe; anteroventral notch of head well defined; antenna 1 geniculate; accessory flagellum 3–articulate; coxa 5 devoid of seta on ventromedial margin; article 2 anteroventral corner of pereopod 5 with a strong setae; epimera 1, 2, 3 with 2, 4, 1 ventral robust setae respectively; telson longer than broad; female gnathopod 2 with 2 long and slender setae on posterior margin. In addition, a key for the identification of all known male species of the genus Nuuanu, and another for the identification of the females, are also presented. 

scholarly journals Estimation of Coral Rubble Quantity using Edge Detection and Morphological- Based Methods

2019 ◽  
Vol 1 (3) ◽  
pp. 105-119
Author(s):  
Nursyahirah Hafiz ◽  
Muhammad Suzuri Hitam ◽  
Zainuddin Bachok ◽  
Mohd Safuan Che Din
Keyword(s):  
Image Processing ◽  
Coral Reef ◽  
Edge Detection ◽  
Image Binarization ◽  
Reef Environment ◽  
Coral Rubble ◽  
Still Image ◽  
Long Time ◽  
Coral Reef Environment ◽  
Processing Steps

Reef rubble represents the broken components of the coral and reef structure which could be in the form of dead, broken or other fragmented coral. The process to estimate the distribution of reef rubble is currently done manually and thus takes a long time to complete and is laborious. This paper presents an image-processing-based method to estimate the distribution of reef rubbles in a coral reef environment from a still image. The method is basically a series of image processing steps including image complement, image binarization, edge detection, smoothing by Weiner filter and followed by erosion and dilation process. The experimental results showed that the system was able to roughly estimate the distribution of reef rubble.

scholarly journals Taxonomic richness and abundance of cryptic peracarid crustaceans in the Puerto Morelos Reef National Park, Mexico

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3411 ◽  
Author(s):  
Luz Veronica Monroy-Velázquez ◽  
Rosa Elisa Rodríguez-Martínez ◽  
Fernando Alvarez
Keyword(s):  
Coral Reef ◽  
National Park ◽  
New Records ◽  
Caribbean Sea ◽  
Back Reef ◽  
Taxonomic Richness ◽  
Coral Rubble ◽  
Fore Reef ◽  
Mexican Caribbean ◽  
Reef Fauna

Background and Aims Cryptic peracarids are an important component of the coral reef fauna in terms of diversity and abundance, yet they have been poorly studied. The aim of this study was to evaluate the taxonomic richness and abundance of cryptic peracarids in coral rubble in the Puerto Morelos Reef National Park, Mexico (PMRNP), and their relationship with depth. Methods Three reef sites were selected: (1) Bonanza, (2) Bocana, and (3) Jardines. At each site six kilograms of coral rubble were collected over four sampling periods at three depths: 3 m (back-reef), 6–8 m (fore-reef), and 10–12 m (fore-reef). Results A total of 8,887 peracarid crustaceans belonging to 200 taxa distributed over five orders and 63 families was obtained; 70% of the taxa were identified to species and 25% to genus level. Fifty species of those collected represent new records for the Mexican Caribbean Sea. Isopoda was the most speciose order while Tanaidacea was the most abundant. Discussion Cryptic peracarid taxonomic richness and abundance were related to depth with higher values of both parameters being found in the shallow (3 m) back-reef, possibly due to a higher reef development and a greater accumulation of coral rubble produced during hurricanes. Peracarid data obtained in the present study can be used as a baseline for future monitoring programs in the PMRNP.

scholarly journals Spatial distribution and feeding substrate of butterflyfishes (family Chaetodontidae) on an Okinawan coral reef

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9666
Author(s):  
Atsushi Nanami
Keyword(s):  
Spatial Distribution ◽  
Coral Reef ◽  
Habitat Characteristics ◽  
Spatial Distributions ◽  
Substrate Selection ◽  
Coral Rubble ◽  
Coral Polyp ◽  
Feeding Substrate ◽  
Species Specific ◽  
Selection Of

Coral reefs support diverse communities, and relationships among organisms within these communities are quite complex. Among the relationships, clarifying the habitat association and foraging substrate selection relative to habitat characteristics is of central importance to ecology since these two aspects are the fundamentals for survival and growth of organisms. The aims of the present study were to investigate the spatial distribution and feeding substrate selection of 14 species of butterflyfishes on an Okinawan coral reef in Japan. Species-specific spatial distributions varied with habitat characteristics (e.g., encrusting corals, massive corals, branching Acropora and rock). For feeding substrates, seven species of obligate coral polyp feeders exhibited significant positive selectivity for tabular Acropora, corymbose Acropora, encrusting corals and massive corals but significant negative selectivity for dead corals, coral rubble and rock. Among six species of facultative coral polyp feeders, two species exhibited significant positive selectivity for encrusting corals and massive corals, and one species showed significant positive selectivity for dead corals as feeding substrates. In contrast, three species exhibited no significant positive selectivity for any feeding substrates. A similar result was observed for one non-coralline invertebrate feeder. Among the 14 species, 12 species showed a relatively close relationship between spatial distribution and feeding substrates but the remaining two species did not. The present study is the first study to elucidate species-specific spatial distributions and feeding substrate selection of butterflyfishes on an Okinawan coral reef. The results of the present study suggest that diverse substrates, including various types of living corals (especially encrusting corals, massive corals, tabular Acropora, corymbose Acropora and branching Acropora) and non-coralline substrates (rock) are the primary determinants of spatial distributions and feeding sites. Thus, diverse substrates are important for maintaining high species diversity of butterflyfishes and changes of the substrates would likely change the spatial patterns and foraging behavior, although species-specific responses may be found, depending on their species-specific dependence on vulnerable substrates.

The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean

Zootaxa ◽  
2003 ◽  
Vol 232 (1) ◽  
pp. 1 ◽  
Author(s):  
JOSÉ M. GUERRA-GARCÍA
Keyword(s):  
Coral Reef ◽  
Indian Ocean ◽  
New Records ◽  
Western Indian Ocean ◽  
Common Species ◽  
Coral Rubble ◽  
Reef System ◽  
Coarse Sediments ◽  
Mauritius Island ◽  
Coral Reef System

The caprellidean fauna of Mauritius was investigated. Sixteen stations were selected around the island and different substrata (including algae, seagrass, sponges, hydroids, ascidians, echinoderms, encrusted dead corals, coral rubble, fine and coarse sediments) were sampled. The study reports seven species in six genera, five of which are new records for the island and one,Metaprotella mauritiensis is described as new to science. Metaprotella sandalensis Mayer, 1898 was the most common species in the coral reef system surrounding Mauritius.

scholarly journals Effect of coral reef restoration on demersal biodiversity in Okinawa, Japan

2019 ◽  
Author(s):  
Piera Biondi ◽  
Giovanni D Masucci ◽  
James D Reimer
Keyword(s):  
Coral Reef ◽  
Global Climate ◽  
Live Coral ◽  
Coral Rubble ◽  
Okinawa Island ◽  
Reef Restoration ◽  
Coral Coverage ◽  
Coral Reef Ecosystems ◽  
Abundance And Diversity ◽  
And Control

Global climate change is leading to damage and loss of coral reef ecosystems. On subtropical Okinawa Island in southwestern Japan, the prefectural government is working on coral reef restoration by outplanting coral colonies from family Acroporidae back to reefs after initially farming colonies inside protected nurseries. In this study we evaluated the ongoing restoration efforts by comparing outplanted locations with nearby control locations with no restoration activity. We examined 3 sites on the coast of Onna Village on the west coast of the island; each site included an outplanted and control location. We used 1) coral rubble sampling to evaluate and compare abundance and diversity of rubble cryptofauna; and 2) coral reef monitoring using photograph transects to track live coral coverage. Results showed that rubble shape had a positive correlation with the numbers of animals found within rubble themselves and may therefore constitute a reliable abundance predictor. Outplanted locations did not show differences with the controls in rubble cryptofauna abundance, but had significantly lower coral coverage. Differences between sites were significant, for both rubble cryptofauna and coral coverage.We recommend; 1) to evaluate outplanting colonies from more stress-resistant genera in place of Acropora, 2) to conduct regular surveys to monitor the situation closely, and 3) to establish conservation and sustainable practices that could aid restoration efforts, reducing coral mortality of both outplanted and native colonies.

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