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Species of myxomycetes from bark samples collected in Luzon island.(a-b) Clastoderma microcarpum (a-sporocarp, b-spores and capillitium); с-Stemonitis pallida (capillitium); de) Dianema harveyi (d-sporocarps, e-spores and capillitium); f) Diderma subasteroides (sporocarps); g) Arcyria cinerea (sporocarps); h) Physarum leucophaeum (sporocarp); i) Physarum album (sporocarps)
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The Philippines, with its rich endemic plant and animal species and abundant natural habitats, is known to be a biodiversity megahotspot. However, Philippines’ deforestation rate was computed to be 1.4 % or about 89,000 hectares lost per year. This requires an urgent assessment of the country’s biodiversity where its microbial flora is inadequately...
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... This is further supported by the study of Macabago et al. (2010) which reported barks had the lowest productivity among the four microhabitats they studied. Similarly, Dagamac et al. (2010) obtained a productivity yield as low as 22.5% from the bark samples collected from Samanea saman trees in the tropical Philippines, albeit higher productivity was observed for other substrata collected in the country, e.g. in the studies of Dagamac et al. (2015aDagamac et al. ( , 2015b, Rea-Maminta et al. (2015), Macabago et al. (2016), Carascal et al. (2017), Dagamac et al. (2017), andPecundo et al. (2017). Comparably, Vaz et al (2017) obtained a productivity yield of 46.7% from the barks of different trees in a seasonally dry tropical forest in Brazil. ...
... Likewise, P. leucophaum is also reported to occur on bark substrates with a high number of collections as observed in this and other studies. Dagamac et al. (2010) sp.1 occurred mostly in the east direction. A similar collection of Licea sp. 1 was also reported from the barks of Samanea saman collected from the same locality (Policina & dela Cruz 2020). ...
Barks of living trees serve as a microhabitat for a distinct assemblage of myxomycetes, the corticolous myxomycetes. In this study, we sampled 86 living Swietenia macrophylla trees for bark samples at four cardinal directions (North, East, South, West) to prepare 344 moist chambers. Of these, only 134 moist chambers yielded myxomycetes recorded either as fruiting bodies or plasmodia. Our study also recorded a total of 125 determinable fruiting bodies which were identified as belonging to 22 species, 11 genera, and 7 taxonomic orders and with the most number of taxa recorded in the west (17) and south (14), followed by east (12) and north (11) directions. Eleven taxa were recorded as abundant, with three taxa of Licea having the highest number of records. Comparing species composition, only four species were common in all directions. Following statistical analysis, we did not observe any significant differences between the diversity values per cardinal direction.
... Myxomycetes (also known as plasmodial slime molds or true slime molds) are phagotrophic eukaryotes, abundantly thriving in terrestrial ecosystems (Dagamac et al. 2010, Kuhn et al. 2013, Massingill and Stephenson 2013, Dagamac et al. 2015a. Morphologically, there are ca. ...
In spite of the increasing number of myxomycete studies in the tropical Southeast Asia over the last decades, many
forest patches are still left unexplored for the region, in particular in the Philippine archipelago. Thus, an assessment of myxomycete
diversity, occurrence, and composition was carried out in forest fragments from two municipalities of the province of
Laguna, Philippines. From the 12 established 5 m × 5 m plots, a total of 240 moist chamber cultures were prepared for this study
and yielded 42 myxomycete species belonging to 14 genera. Rarefaction curves and several heterogeneity indices revealed
higher species diversity in Los Baños than in Calauan. Moreover, the taxonomic diversity index also showed that the taxonomic
diversity of myxomycete in Los Baños is more intuitively diverse than in Calauan. In terms of community analysis between the
two municipalities, it showed that myxomycete communities clustered between different microhabitats. High values of coefficient
of community and percentage similarity indices possibly implicates that spore dispersal in forest fragments in closer proximities
may cause high number of shared species (60%). With an addition of Cribraria lepida as a new record for the country,
this study now updates the myxomycete profile for Laguna, Philippines.
... In the present study, we first looked at the productivity of moist chamber cultures. Percentage yield has been used in several previous studies of myxomycetes in the Philippines and was, for example, noted for substrates collected in different parts of Luzon Island (Dagamac et al. 2012;Dagamac et al. 2010;dela Cruz et al. 2010). In general, substrates collected from lower elevation study areas were observed to yield more myxomycetes in moist chamber cultures. ...
... Stephenson (1988) also reported that collections obtained over a period of five years revealed evidence of seasonal patterns of abundance, species richness and species diversity. Another factor that can influence for the observed variation in species composition at different elevations is the nature of the substrates or microhabitats potentially available for the growth and development Kosheleva et al. 2008;Kilgore et al. 2009;Dagamac et al. 2010;Tucker et al. 2011). Moreover, factors such as an exceptionally low or high pH for a particular type of substrate can limit the occurrence of species of myxomycetes that are otherwise considered as cosmopolitan. ...
There is a general lack of understanding of the ecology of myxomycetes in tropical rainforests, particularly those found in the Philippines. The research described herein was carried out to assess the occurrence and distribution of litter myxomycetes at different elevations in Mt. Arayat
National Park, Pampanga, Philippines. Samples of leaf litter and twigs on the ground were collected from study sites located at five different elevations (200, 315, 500, 700, and 800 masl) along two transects on Mt. Arayat. In each study site, samples were collected randomly from within a
10 m × 10 m plot. These samples were taken back to the laboratory and used to prepare 1200 moist chamber cultures (240 cultures for each elevation). The cultures yielded a total of 30 species of myxomycetes representing 13 genera. The highest taxonomic diversity was recorded for study
sites at the highest elevations (i.e., 700–800 masl), while the highest species diversity was observed at 700 masl.
... Dagamac et al. (2011) and Macabago et al. (2012) reported eleven new records for the Philippines from Mt. Arayat National Park, Pampanga and Lubang Island, Occidental Mindoro, respectively. Dagamac et al. (2010) also included five new records of corticolous myxomycetes associated with Samanea saman (Jacq.) Merr. in the Philippines. ...
... Recently, Dagamac et al. (2011) and Macabago et al. (2012) reported eleven new records for the Philippines from Mt. Arayat National Park, Pampanga and Lubang Island, Occidental Mindoro, respectively. Dagamac et al. (2010) also included five new records of corticolous myxomycetes associated with Samanea saman (Jacq.) Merr. in the Philippines. ...
... Generally, little is known for myxomycete assemblages associated with tropical forests in the Southeast Asian region. A few published studies reported 124 species for the Philippines (Reynolds 1981;Moreno et al. 2009;Dagamac et al. 2010Dagamac et al. , 2011Macabago et al. 2012). In the present study, assemblages of myxomycetes were assessed in six highland areas in Luzon Island using the moist chamber culture technique. ...
yxomycetes (slime molds) are ideal model organisms for population dynamics studies in terrestrial forest habitats. This research assessed the occurrence and distribution of myxomycetes in selected highland areas of three provinces in Luzon Island, Philippines. Myxomycetes present in the moist chambers of aerial and ground leaf litter, twigs, and dead barks of living trees were recorded and used to assess their abundance and diversity for each of the study sites. The obtained results showed that 51% of prepared moist chambers yielded myxomycetes. Identification of the collected myxomycetes resulted in 25 species belonging to 7 genera including Arcyria, Comatricha, Diderma, Didymium, M Perichaena, Physarum, and Stemonitis. Physarum decipiens is reported as a new record for the Philippines. Four species including Arcyria cinerea, Comatricha nigra, Physarum album, and Stemonitis fusca were the most abundant. Many species were reported as rare. Our research showed similarities in the distribution of myxomycete assemblages in the study areas with closer proximities.
... Recently, Dagamac et al. (2011) and Macabago et al. (2012) reported eleven new records for the Philippines from Mt. Arayat National Park, Pampanga and Lubang Island, Occidental Mindoro, respectively. Dagamac et al. (2010) also included five new records of corticolous myxomycetes associated with Samanea saman (Jacq.) Merr. in the Philippines. ...
... Generally, little is known for myxomycete assemblages associated with tropical forests in the Southeast Asian region. A few published studies reported 124 species for the Philippines (Reynolds 1981;Moreno et al. 2009;Dagamac et al. 2010Dagamac et al. , 2011Macabago et al. 2012). In the present study, assemblages of myxomycetes were assessed in six highland areas in Luzon Island using the moist chamber culture technique. ...
... cacographicum, O. schweinitzii and P. microspora-have not been reported previously from Asia and thus are first known records in Asia. Recently, 15 species were listed as new records for the Philippines (Corpuz et al. 2009;Moreno et al. 2009;Dagamac et al. 2010Dagamac et al. , 2011. Together with the new records reported in this study, this increases the number of species of Philippine myxomycetes from the previously annotated list of 107 (Reynolds 1981) to a new total of 128 species. ...
The first records of myxomycetes are reported from Lubang Island, Occidental Mindoro, Philippines. Specimens collected in the field and/or from moist chamber cultures prepared with samples of ground leaf litter and twigs yielded a total of 45 taxa, six of which are new to the Philippines. These are Arcyria globosa, Collaria rubens, Comatricha robusta, Craterium atrolucens, Lamproderma cacographicum, and Perichaena microspora. Thirty years after Reynolds (1981) had published a checklist of the myxomycetes of the Philippines, the total number of species now known from the country has been increased from 107 to 128, including the present six new additions.
... A total of 696 moist chambers were prepared from the four types of substrate, and a relatively low percent yield (23%) of myxomycetes was obtained. These result were comparable to the same low productivity noted for samples of substrates collected in different part of Luzon Island (Corpuz et al. 2009;Dagamac et al. 2010), Nevertheless, the overall value in using moist chamber cultures to assess the diversity of myxomycetes had been demonstrated in numerous studies (e.g. Harkonen, 1981;Stephenson, 1989;Lado et al. 2003;Wrigley-de Bassanta et al. 2008, Kilgore et al. 2009). ...
... Arcyria pomiformis) were reported recently from Laguna and Cavite (Corpuz et al. 2009). Two other myxomycetes (Stemonitis pallida and Diderma subasteroides) were also reported recently as new records for the country and noted as corticolous myxomycetes on the bark of Samanea saman in Quezon City and Zambales (Dagamac et al. 2010). Interestingly, four of the species (Arcyria afroalpina, Collaria arcyrionema, Craterium concinnum and Licea biforis) listed herein are reported as new records for the country. ...
... In the Neotropics, A. cinerea was reported as abundant, along with a number other species belonging to the order Physarales ). However, Dagamac et al. (2010) noted that A. cinerea was rare on bark substrates. Two species (D. squamolosum and P. compressum) were reported as abundant, whereas three species (D. hemisphaericum, P. echinosporum and S. pallida) represented ≥5% but <10% of the total collections and, thus, were recorded as common. ...
The Philippines has a poorly documented microbial flora and this is particularly true for myxomycetes. Thus, the research project described herein was carried out to assess the occurrence, distribution and diversity of the communities of myxomycetes in Mt. Arayat National Park. A total of 21 species representing 11 genera were recorded from substrates collected along two transects (Baño and Magaang) located in Mt. Arayat during the wet and dry season. Samples collected during the dry season, along the Magalang Trail, and aerial litter were the most taxonomically diverse, whereas the highest values for species diversity were observed for the Baño Trail, ground leaf litter and the dry season. Comparisons of the myxomycete communities yielded relatively high coefficient of community (CC) and percentage similarity (PS) values for the dry and wet seasons. This is the first study for the Philippines that has attempted to document the species composition of myxomycetes and their abundance in relation to the time of year they were collected, differences that exist between sites and substrates upon which these organisms occur.
... Only just recently that interest in these organisms came about. Dagamac et al. (2010) reported seven corticolous myxomycetes from different sites in Luzon, five were new records for the country. Dagamac (2010) also assessed the myxomycete diversity on Mt. ...
... Dagamac et al. (2010) reported seven corticolous myxomycetes from different sites in Luzon, five were new records for the country. Dagamac (2010) also assessed the myxomycete diversity on Mt. Arayat National Park, Pampanga and reported a total of 34 species, 5 of these were new records for the Philippines. ...
ABSRACT Myxomycetes are ubiquitous in terrestrial forest ecosystems. Thus, this research study looks at the taxonomic diversity and distribution of plasmodial myxomycetes in La Mesa Ecopark in Quezon City, Philippines. A total of 240 moist chambers were prepared from four substrates (aerial and ground leaf litter, twigs and barks) collected within this ecopark. Following incubation of moist chambers for eight weeks, a total of 28 species belonging to 10 genera were collected and identified: Arcyria (3), Diderma (2), Didymium (5), Lamproderma (2), Perichaena (3), Physarum (8), Macbrideola (1), Metatrichia (1), Trichia (1) and Stemonitis (2). Highest myxomycete yield (85%) was observed in aerial leaf litter. In terms of taxonomic diversity, highest diversity was observed in bark microhabitats, although the lowest number of species was recorded in it. Assessment of their abundance and distribution showed similarities in species composition between aerial and ground leaf litter. This research study is the first report of plasmodial myxomycetes in La Mesa Ecopark in Quezon City, Philippines.
... Dagamac et al. also reported seven species of corticolous myxomycetes from Samanea samans (Jacq.) Merr., five of which were new records for the country [9]. However, the number is still considered small as compared to other countries in the tropics. ...
... Listed below are the myxomycetes collected from Subic Watershed Forest Reserve: [15,16]. Physarum leucophaeum and Stemonitis pallida were reported as corticolous myxomycetes associated with Samanea samans [9]. These, together with the species of Arcyria denudata, Comatricha nigra, and Stemonitis fusca, were listed from Mt. Arayat National Park in Pampanga as well as from either one of the provinces of Camarines, Palawan and the Mountain Province [15,16]. ...
