Affendi Yang Amri

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Verified

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• MSc
• Research Officer at University of Malaya

Coral reef ecosystems are severely threatened by human activities and climate change. However, the complexity of the ecosystem can complicate identification of significant ecological interactions between the organisms and the reef system. Thus, this study used a ten-year citizen science reef monitoring dataset by Reef Check Malaysia to identify key...

Seagrass-gleaning fisheries are vital small-scale fisheries that significantly contribute to coastal livelihoods. Despite their significance, these fisheries are often overlooked in coastal management planning. This study investigates the seagrass-gleaning fisheries of the Kampung Perigi Acheh community in the Sungai Johor estuary, focusing on the...

Society relies on intact marine ecosystems for ecosystem services such as nutrition, livelihoods, health and well‐being. Yet, to obtain these benefits, we carry out activities, introducing pressures to ecosystems, damaging and degrading habitats and reducing their capacity to optimally provide ecosystem services. Biodiversity and ecosystem services...

Within the Malaysian context, whilst numerous efforts have been carried out over the years to identify, study, and analyse the extent and state of our coastal and marine ecosystem, these efforts are neither comprehensive nor have the available information been systematically consolidated and made available. To set more ambitious conservation target...

The impacts of (repeat) bleaching events and the differential heat stress susceptibility of hard coral taxa are largely unknown in Malaysia, although it is part of the greater coral triangle. Here we determined bleaching trajectories of 46 hard coral taxa across- and within-reef scales based on data recorded during the first reported back-to-back c...

This report assesses the potential of sustainably-produced artificial coral reef materials metakaolin clay, hydrogel microcapsules, and nanocomposite microcapsule-encapsulated calcifying bacteria as artificial coral reef constituents. The findings show that nanoclays...

The clownfish-sea anemones are a diverse group of benthic anthozoans that are foundpredominantly in tropical to subtropical waters. However, little is known about their adaptation to changes in their environment. Here, we investigated the effects of high light (HL) and low light (LL) on the Symbiodiniaceae in Radianthus magnifica (n = 8) in depths...

The most common and best method of obtaining shallow-water bathymetry is using a single-beam echosounder (SBES). There were numerous studies on drone DEM for shallow river basins and coastal areas, but not on shallow-water coral reef areas. Thus, this study was carried out to compare the DEM produced by a consumer-grade drone with the bathymetry ob...

Coral reefs in the Central Indo-Pacific region comprise some of the most diverse and yet threatened marine habitats. While reef monitoring has grown throughout the region in recent years, studies of coral reef benthic cover remain limited in spatial and temporal scales. Here, we analysed 24,365 reef surveys performed over 37 years at 1972 sites thr...

The effective and reliable monitoring of fish communities is important for the management and protection of marine ecosystems. Environmental DNA (eDNA) metabarcoding is a relatively new method that has been widely used in recent years, while traditional sampling via fish catching (i.e., gillnets) is one of the most common and reliable fish monitori...

Species invasion is a leading threat to marine ecosystems worldwide, being deemed as one of the ultimate jeopardies for biodiversity along with climate change. Tackling the emerging biodiversity threat to maintain the ecological balance of the largest biome in the world has now become a pivotal part of the Sustainable Development Goals (SDGs). Mari...

We present a comprehensive checklist of scleractinian (hard) corals for the Mersing Islands, Malaysia based on surveys conducted at 24 reefs across protected and unprotected marine areas. A total of 261 species of corals from 16 families and one incertae sedis ( Pachyseris spp.) were recorded, along with ten records that are new for the east coast...

Due to current greenhouse gas emissions, Malaysian coral reefs are predicted to experience severe annual coral bleaching events by 2043, threatening the survival of coral reefs within this century. However, there is no field data on how Malaysian coral reefs respond to successive events of coral bleaching. Despite the notion that many scleractinian...

In Southeast Asia, seagrass meadows are under threat through coastal development and increased pollution, but remain understudied. The dugong is a marine herbivore that is dependent on the availability of seagrass as a primary food source. In this study, we assess the patterns of co-occurrence between dugongs and seagrass. We hypothesize that the c...

Nature-based Solutions (NbS) have been advocated to protect, sustainably manage, and restore natural or modified ecosystems, simultaneously providing human well-being and biodiversity benefits. The uptake of NbS differs regionally with some countries exhibiting greater uptake than others. The success of NbS also differs regionally with varying envi...

Ecosystem service potential Confidence scores Evidence gaps particularly scarce, especially in SE Asia. Given the growing coastal population and expansion in blue economy sectors in SE Asia, evidence to support effective marine planning, such as ecosystem service assessments, is urgently needed. Data deficiencies for marine systems, especially (but...

Barnacles are ubiquitous in coastal ecosystems of different geographical regions worldwide. This is the first study attempting to assess the suitability of barnacles as bioindicators of persistent organic pollutants (POPs) in coastal environments. Barnacles were collected from the coasts around Peninsular Malaysia and analyzed for POPs including po...

With the potential adverse effects of climate change, it is essential to enhance the understanding of marine ecosystem dynamics, which can be driven by the co-evolutionary interaction between autotrophs and herbivores. This study looked into the autotroph-herbivore interactions in Malaysian waters, mainly to determine if autotroph nutritional quali...

Redang Islands Marine Park consists of nine islands in the state of Terengganu, Malaysia. Redang Island is one of the largest off the east coast of Peninsular Malaysia, which is famous for its crystal-clear waters and white sandy beaches. The ichthyofauna of the Redang archipelago was surveyed by underwater visual observations between August 2016 a...

Effective marine park management and protection of coral reefs can only happen if managers have adequate knowledge of reef health and area. However, obtaining such information is labor intensive and difficult with limited funding and time. Reef Check Malaysia was engaged by Department of Marine Parks Malaysia to map the coral reefs surrounding Tiom...

Seagrass meadows are highly productive habitats that support commercially and ecologically important fishes and invertebrates. However, evidence of fish-habitat relationships are seldom drawn from forereef seagrass meadows that are structurally simple in terms of species richness and relative size and, consequently, their role as habitats is unclea...

Globally, peptide-based anticancer therapies have drawn much attention. Marine organisms are a reservoir of anticancer peptides that awaits discovery. In this study, we aimed to identify cytotoxic oligopeptides from Sarcophyton glaucum. Peptides were purified from among the S. glaucum hydrolysates produced by alcalase, chymotrypsin, papain and tryp...

Resistance and side effects are common problems for anticancer drugs used in chemotherapy. Thus, continued research to discover novel and specific anticancer drugs is obligatory. Marine sponges hold great promise as a source of potent cytotoxic peptides with future applications in cancer treatments. This study aimed to purify and identify cytotoxic...

Particulate phosphorus was the dominant phosphorus species and accounted for 72 ± 5% of total phosphorus in coastal habitats, 63 ± 4% in estuaries, 58 ± 6% in lakes and 80 ± 7% in aquaculture farms whereas dissolved inorganic phosphorus (DIP) and dissolved organic phosphorus (DOP) were minor components. Correlation analyses (DIP vs Chl a; R2 = 0.40...

There are thirteen islands gazetted as Malaysian Marine Park Areas (MPAs) in Johor State waters. This report on the 8 non-MPA islands provide information for the consideration of the Johor State government in creating a larger and improved SIMP by adding either a subset or all of these areas surveyed. There are 4 objectives in this study, which are...

The South China Sea in the Central Indo-Pacific is a large semi-enclosed marine region that supports an extraordinary diversity of coral reef organisms (including stony corals), which varies spatially across the region. While one-third of the world’s reef corals are known to face heightened extinction risk from global climate and local impacts, pro...

n 2012 the status of Southeast Asia’s coral reefs was determined using Reef Check survey methods on 295 sites from six different countries; 50 in Brunei, 22 in Philippines, 40 in Taiwan, 24 in Thailand, 18 in Indonesia and 141 in Malaysia. Data collected and assessed were the Indo Pacific Reef Check indicator fish, invertebrates and substrate. The...

The South China Sea in the Central Indo-Pacific is a large marine region that spans an area of more than 3 million km2 bounded by the coastlines of ten Asian nation states and contains numerous small islands. Although it abuts the western border of the Coral Triangle, the designated centre of maximum marine biodiversity, the South China Sea has rec...

Purpose: To determine the antioxidant activity of methanol extract (ME) and solvent fractions of Avrainvillea erecta as well as their total phenolic and flavonoid contents. Methods: The antioxidant activities of ME as well as its chloroform, butanol, and aqueous fractions (CF, BF and WF, respectively) of A. erecta were evaluated via 2,2-diphenyl-1-...

This paper outlines the benefits of using the framework for an ecosystem approach to fisheries management (EAFM) for dealing with the inevitable yet unclear impacts of climate change and ocean acidification on coastal fisheries. With a focus on the Asia-Pacific region, it summarizes the projected biological and socioeconomic effects of increased em...

This is a product of an expert workshop that was held on 6–9th March 2012 in Bohol, Philippines. The United States Agency for International Development (USAID) and the National Oceanic and Atmospheric Administration (NOAA) funded the four-day workshop, which brought together 20 participants with scientific and policy expertise in ocean acidificatio...

Stylophora pistillata is a widely used coral "lab-rat" species with highly variable morphology and a broad biogeographic range (Red Sea to western central Pacific). Here we show, by analysing Cytochorme Oxidase I sequences, from 241 samples across this range, that this taxon in fact comprises four deeply divergent clades corresponding to the Pacifi...

Supplementary information

In situ measurement of photosynthetic capacity in scleractinian corals (Acropora formosa and Pocillopora damicornis) during the 2010 massive coral reef bleaching event in Pulau Tioman, Malaysia Abstract In situ measurement of Acropora formosa and Pocillopora damicornis photosynthetic capacity was conducted to evaluate the severity of the massive co...

Coral bleaching events vary in severity, however, to date, the hierarchy of susceptibility to bleaching among coral taxa has been consistent over a broad geographic range and among bleaching episodes. Here we examine the extent of spatial and temporal variation in thermal tolerance among scleractinian coral taxa and between locations during the 201...

Seagrasses are habitats with significant ecological and economic functions but we have limited knowledge of seagrasses in Southeast Asia, the hypothesized centre-of-origin for tropical seagrasses. There have been only 62 ISI-cited publications on the seagrasses of Southeast Asia in the last three decades and most work has been in few sites such as...

This study investigated the effect of orientation of the Pulau Tioman Marine Park jetty pillars on the underwater light intensity, zooxanthellae density and chlorophyll content of Acropora selago (branching coral) and Cyphastrea japonica (encrusting coral). There was significant difference in Photosynthetically Active Radiation (PAR) level between...

Effective and Maximum quantum yield is important in assessing the photosynthetic ability of the lace coral Pocillopora damicornis. The changes of its photosynthetic ability can reflect its current health status. A pulse amplitude modulation (PAM) chlorophyll fluorescence technique was used and measurements were taken in situ and in real time using...

Effective and Maximum quantum yield is important in assessing the photosynthetic ability of the lace coral Pocillopora damicornis. The changes of its photosynthetic ability can reflect its current health status. A pulse amplitude modulation (PAM) chlorophyll fluorescence technique was used and measurements were taken in situ and in real time using...

A preliminary study was conducted at selected localities to estimate the total species number of coral reef fish at Pulau (=island) Pangkor, Perak. General quantitative survey was carried out by snorkeling and SCUBA diving in coral reef areas to record their fish species by visual observation and underwater digital photographs. Underwater transects...

Seagrass surveys were conducted in the Sibu-Tinggi Group of Islands and the Sungai Johor meadows to identify meadows that are vital for dugong conservation. Field visits to the Sibu-Tinggi Islands were done from 11 to 14 April 2007, and from 25 – 27 November 2007 in the Sungai Johor Area. The first trip involved dive SCUBA surveys while the latter...

areas were previously included; zx The 2004 Indian Ocean tsunami caused localized coral reef damage in Indonesia, Thailand and Malaysia. Post-tsunami assessments indicate there was severe localised damage in a few areas, and minimal damage on most reefs. Recovery from the tsunami is expected to take 5–10 years for most affected reefs, and 20 years...

Underwater surveys were done at Pulau Perak in 2004 and 2006 to investigate whether corals were present after the last scientific expedition in 1958. Using a modified Reef Check method at two study stations at 5 m and 15 m depths, it was documented that corals were not only present but had a high cover of up to 58%. Abundant fish life and high numb...

Pulau Perak, which is located in the northern Straits of Malacca has received little attention from researches and coral reef fishes of the island have not been documented previously. The island is the westernmost outpost of Peninsular Malaysia, with very clear water. It is the only island in Peninsular Malaysia with steep slope down to 50 meters w...

Surveys were done for three sites in Johor (South East Coast of Johor, Sibu-Tinggi Group of Islands and Sg Johor) looking for dugongs and their vital seagrass beds. Numerous field visits were done from April to September 2005 using aerial, boat and questionnaire surveys. Dugongs were sighted during our aerial surveys in the Sibu-Tinggi Group of Isl...

Rapid and detailed post-tsunami surveys carried out in the Langkawi archipelago in January 2005 showed that the coral reefs dOld_ID not suffer any significant structural damage. Nevertheless, there were signs of recent sediment resuspension at the sites studied. The diversity and abundance of coral reef fishes and invertebrates were low. However, t...

The reef situated adjacent to Kg. Tekek, Pulau Tioman Marine Park was surveyed during the months of August to October 2004 to document the diversity of hard corals (scleractinian corals) found there. We did random swims using SCUBA along the reef while taking notes of each coral colony morphology and growth forms. Additional underwater close-up dig...

The reef situated adjacent to Kg. Tekek, Pulau Tioman Marine Park was surveyed during the months of August to October 2004 to document the diversity of hard corals (scleractinian corals) found there. We did random swims using SCUBA along the reef while taking notes of each coral colony morphology and growth forms. Additional underwater close-up dig...

A random dive survey of coral reef fish of Kg. Tekek, Pulau Tioman Marine Park was conducted to look at the diversity of coral reef fish in the area. The survey was conducted at various depths from the deepest, part after coral slope to the shallowest part, near the shoreline. Night dive was also conducted to look at the nocturnal species. A total...

Pulse–amplitude–modulation chlorophyll fluorometry was used to examine changes in dark-adapted Fv/Fm of endosymbiotic dinoflagellate microalgae within the tissues of the temperate coral Plesiastrea versipora exposed to elevated seawater temperature. The Fv/Fm was markedly reduced following exposure of corals to 28°C for 48 h. When corals were retur...

Pulse-amplitude-modulation chlorophyll fluorometry was used to examine changes in dark-adapted F-v/F-m of endosymbiotic dinoflagellate microalgae within the tissues of the temperate coral Plesiastrea versipora exposed to elevated seawater temperature. The F-v/F-m was markedly reduced following exposure of corals to 28 degrees C for 48 h. When coral...